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[bpt/emacs.git] / lisp / progmodes / sql.el

;;; sql.el --- specialized comint.el for SQL interpreters

;; Copyright (C) 1998, 1999, 2000, 2001, 2002  Free Software Foundation, Inc.

;; Author: Alex Schroeder <alex@gnu.org>
;; Maintainer: Alex Schroeder <alex@gnu.org>
;; Version: 1.7.0
;; Keywords: comm languages processes
;; URL: http://www.emacswiki.org/cgi-bin/wiki.pl?SqlMode

;; This file is part of GNU Emacs.

;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

;;; Commentary:

;; Please send bug reports and bug fixes to the mailing list at
;; sql.el@gnu.org.  If you want to subscribe to the mailing list, send
;; mail to sql.el-request@gnu.org with `subscribe sql.el FIRSTNAME
;; LASTNAME' in the mail body.

;; This file provides a sql-mode and a sql-interactive-mode.  My goals
;; were two simple modes providing syntactic hilighting.  The
;; interactive mode had to provide a command-line history; the other
;; mode had to provide "send region/buffer to SQL interpreter"
;; functions.  "simple" in this context means easy to use, easy to
;; maintain and little or no bells and whistles.

;; If anybody feels like extending this sql mode, take a look at the
;; above mentioned modes and write a sqlx-mode on top of this one.  If
;; this proves to be difficult, please suggest changes that will
;; facilitate your plans.

;; sql-interactive-mode is used to interact with a SQL interpreter
;; process in a SQLi buffer (usually called `*SQL*').  The SQLi buffer
;; is created by calling a SQL interpreter-specific entry function.  Do
;; *not* call sql-interactive-mode by itself.

;; The list of currently supported interpreters and the corresponding
;; entry function used to create the SQLi buffers is shown with
;; `sql-help' (M-x sql-help).

;; Since sql-interactive-mode is built on top of the general
;; command-interpreter-in-a-buffer mode (comint mode), it shares a
;; common base functionality, and a common set of bindings, with all
;; modes derived from comint mode.  This makes these modes easier to
;; use.

;; sql-mode can be used to keep editing SQL statements.  The SQL
;; statements can be sent to the SQL process in the SQLi buffer.

;; For documentation on the functionality provided by comint mode, and
;; the hooks available for customizing it, see the file `comint.el'.

;; Hint for newbies: take a look at `dabbrev-expand', `abbrev-mode', and
;; `imenu-add-menubar-index'.

;;; Requirements for Emacs 19.34:

;; If you are using Emacs 19.34, you will have to get and install
;; the file regexp-opt.el
;; <URL:ftp://ftp.ifi.uio.no/pub/emacs/emacs-20.3/lisp/emacs-lisp/regexp-opt.el>
;; and the custom package
;; <URL:http://www.dina.kvl.dk/~abraham/custom/>.

;;; Bugs:

;; Using sql-ms (isql by Microsoft): When commands with syntax errors
;; or execution errors are executed, there is no server feedback.
;; This happens in stored procedures for example.  The server messages
;; only appear after the process is exited.  This makes things
;; somewhat unreliable.

;; ChangeLog available on request.

;;; To Do:

;; Add better hilight support for other brands; there is a bias towards
;; Oracle because that's what I use at work.  Anybody else just send in
;; your lists of reserved words, keywords and builtin functions!  As
;; long as I don't receive any feedback, everything is hilighted with
;; ANSI keywords only.  I received the list of ANSI keywords from a
;; user; if you know of any changes, let me know.

;; Add different hilighting levels.

;;; Thanks to all the people who helped me out:

;; Kai Blauberg <kai.blauberg@metla.fi>
;; <ibalaban@dalet.com>
;; Yair Friedman <yfriedma@JohnBryce.Co.Il>
;; Gregor Zych <zych@pool.informatik.rwth-aachen.de>
;; nino <nino@inform.dk>
;; Berend de Boer <berend@pobox.com>

\f

;;; Code:

(require 'comint)
;; Need the following to allow GNU Emacs 19 to compile the file.
(require 'regexp-opt)
(require 'custom)

;;; Allow customization

(defgroup SQL nil
  "Running a SQL interpreter from within Emacs buffers"
  :version "20.4"
  :group 'processes)

;; These three variables will be used as defaults, if set.

(defcustom sql-user ""
  "*Default username."
  :type 'string
  :group 'SQL)

(defcustom sql-password ""
  "*Default password.

Storing your password in a textfile such as ~/.emacs could be dangerous.
Customizing your password will store it in your ~/.emacs file."
  :type 'string
  :group 'SQL)

(defcustom sql-database ""
  "*Default database."
  :type 'string
  :group 'SQL)

(defcustom sql-server ""
  "*Default server or host."
  :type 'string
  :group 'SQL)

;; misc customization of sql.el behaviour

(defcustom sql-electric-stuff nil
  "Treat some input as electric.
If set to the symbol `semicolon', then hitting `;' will send current
input in the SQLi buffer to the process.
If set to the symbol `go', then hitting `go' on a line by itself will
send current input in the SQLi buffer to the process.
If set to nil, then you must use \\[comint-send-input] in order to send
current input in the SQLi buffer to the process."
  :type '(choice (const :tag "Nothing" nil)
                 (const :tag "The semikolon `;'" semicolon)
                 (const :tag "The string `go' by itself" go))
  :version "20.8"
  :group 'SQL)

(defcustom sql-pop-to-buffer-after-send-region nil
  "*If t, pop to the buffer SQL statements are sent to.

After a call to `sql-send-region' or `sql-send-buffer',
the window is split and the SQLi buffer is shown.  If this
variable is not nil, that buffer's window will be selected
by calling `pop-to-buffer'.  If this variable is nil, that
buffer is shown using `display-buffer'."
  :type 'boolean
  :group 'SQL)

;; imenu support for sql-mode.

(defvar sql-imenu-generic-expression
  '(("Tables" "^\\s-*create\\s-+table\\s-+\\(\\w+\\)" 1)
    ("Indexes" "^\\s-*create\\s-+index\\s-+\\(\\w+\\)" 1))
  "Define interesting points in the SQL buffer for `imenu'.

This is used to set `imenu-generic-expression' when SQL mode is
entered.  Subsequent changes to sql-imenu-generic-expression will not
affect existing SQL buffers because imenu-generic-expression is a
local variable.")

;; history file

(defcustom sql-input-ring-file-name nil
  "*If non-nil, name of the file to read/write input history.

You have to set this variable if you want the history of your commands
saved from one Emacs session to the next.  If this variable is set,
exiting the SQL interpreter in an SQLi buffer will write the input
history to the specified file.  Starting a new process in a SQLi buffer
will read the input history from the specified file.

This is used to initialize `comint-input-ring-file-name'.

Note that the size of the input history is determined by the variable
`comint-input-ring-size'."
  :type '(choice (const :tag "none" nil)
                 (file))
  :group 'SQL)

(defcustom sql-input-ring-separator "\n--\n"
  "*Separator between commands in the history file.

If set to \"\\n\", each line in the history file will be interpreted as
one command.  Multi-line commands are split into several commands when
the input ring is initialized from a history file.

This variable used to initialize `comint-input-ring-separator'.
`comint-input-ring-separator' is part of Emacs 21; if your Emacs
does not have it, setting `sql-input-ring-separator' will have no
effect.  In that case multiline commands will be split into several
commands when the input history is read, as if you had set
`sql-input-ring-separator' to \"\\n\"."
  :type 'string
  :group 'SQL)

;; The usual hooks

(defcustom sql-interactive-mode-hook '()
  "*Hook for customizing `sql-interactive-mode'."
  :type 'hook
  :group 'SQL)

(defcustom sql-mode-hook '()
  "*Hook for customizing `sql-mode'."
  :type 'hook
  :group 'SQL)

(defcustom sql-set-sqli-hook '()
  "*Hook for reacting to changes of `sql-buffer'.

This is called by `sql-set-sqli-buffer' when the value of `sql-buffer'
is changed."
  :type 'hook
  :group 'SQL)

;; Customization for Oracle

(defcustom sql-oracle-program "sqlplus"
  "*Command to start sqlplus by Oracle.

Starts `sql-interactive-mode' after doing some setup.

Under NT, \"sqlplus\" usually starts the sqlplus \"GUI\".  In order to
start the sqlplus console, use \"plus33\" or something similar.  You
will find the file in your Orant\\bin directory.

The program can also specify a TCP connection.  See `make-comint'."
  :type 'file
  :group 'SQL)

(defcustom sql-oracle-options nil
  "*List of additional options for `sql-oracle-program'."
  :type '(repeat string)
  :version "20.8"
  :group 'SQL)

;; Customization for SQLite

(defcustom sql-sqlite-program "sqlite"
  "*Command to start SQLite.

Starts `sql-interactive-mode' after doing some setup.

The program can also specify a TCP connection.  See `make-comint'."
  :type 'file
  :group 'SQL)

(defcustom sql-sqlite-options nil
  "*List of additional options for `sql-mysql-program'.
The following list of options is reported to make things work
on Windows: \"-C\" \"-t\" \"-f\" \"-n\"."
  :type '(repeat string)
  :version "20.8"
  :group 'SQL)

;; Customization for MySql

(defcustom sql-mysql-program "mysql"
  "*Command to start mysql by TcX.

Starts `sql-interactive-mode' after doing some setup.

The program can also specify a TCP connection.  See `make-comint'."
  :type 'file
  :group 'SQL)

(defcustom sql-mysql-options nil
  "*List of additional options for `sql-mysql-program'.
The following list of options is reported to make things work
on Windows: \"-C\" \"-t\" \"-f\" \"-n\"."
  :type '(repeat string)
  :version "20.8"
  :group 'SQL)

;; Customization for Solid

(defcustom sql-solid-program "solsql"
  "*Command to start SOLID SQL Editor.

Starts `sql-interactive-mode' after doing some setup.

The program can also specify a TCP connection.  See `make-comint'."
  :type 'file
  :group 'SQL)

;; Customization for SyBase

(defcustom sql-sybase-program "isql"
  "*Command to start isql by SyBase.

Starts `sql-interactive-mode' after doing some setup.

The program can also specify a TCP connection.  See `make-comint'."
  :type 'file
  :group 'SQL)

(defcustom sql-sybase-options nil
  "*List of additional options for `sql-sybase-program'.
Some versions of isql might require the -n option in order to work."
  :type '(repeat string)
  :version "20.8"
  :group 'SQL)

;; Customization for Informix

(defcustom sql-informix-program "dbaccess"
  "*Command to start dbaccess by Informix.

Starts `sql-interactive-mode' after doing some setup.

The program can also specify a TCP connection.  See `make-comint'."
  :type 'file
  :group 'SQL)

;; Customization for Ingres

(defcustom sql-ingres-program "sql"
  "*Command to start sql by Ingres.

Starts `sql-interactive-mode' after doing some setup.

The program can also specify a TCP connection.  See `make-comint'."
  :type 'file
  :group 'SQL)

;; Customization for Microsoft

(defcustom sql-ms-program "isql"
  "*Command to start isql by Microsoft.

Starts `sql-interactive-mode' after doing some setup.

The program can also specify a TCP connection.  See `make-comint'."
  :type 'file
  :group 'SQL)

(defcustom sql-ms-options '("-w" "300" "-n")
  ;; -w is the linesize
  "*List of additional options for `sql-ms-program'."
  :type '(repeat string)
  :version "21.4"
  :group 'SQL)

;; Customization for Postgres

(defcustom sql-postgres-program "psql"
  "Command to start psql by Postgres.

Starts `sql-interactive-mode' after doing some setup.

The program can also specify a TCP connection.  See `make-comint'."
  :type 'file
  :group 'SQL)

(defcustom sql-postgres-options '("-P" "pager=off")
  "*List of additional options for `sql-postgres-program'.
The default setting includes the -P option which breaks older versions
of the psql client (such as version 6.5.3).  The -P option is equivalent
to the --pset option.  If you want the psql to prompt you for a user
name, add the string \"-u\" to the list of options.  If you want to
provide a user name on the command line (newer versions such as 7.1),
add your name with a \"-U\" prefix (such as \"-Umark\") to the list."
  :type '(repeat string)
  :version "20.8"
  :group 'SQL)

;; Customization for Interbase

(defcustom sql-interbase-program "isql"
  "*Command to start isql by Interbase.

Starts `sql-interactive-mode' after doing some setup.

The program can also specify a TCP connection.  See `make-comint'."
  :type 'file
  :group 'SQL)

(defcustom sql-interbase-options nil
  "*List of additional options for `sql-interbase-program'."
  :type '(repeat string)
  :version "20.8"
  :group 'SQL)

;; Customization for DB2

(defcustom sql-db2-program "db2"
  "*Command to start db2 by IBM.

Starts `sql-interactive-mode' after doing some setup.

The program can also specify a TCP connection.  See `make-comint'."
  :type 'file
  :group 'SQL)

(defcustom sql-db2-options nil
  "*List of additional options for `sql-db2-program'."
  :type '(repeat string)
  :version "20.8"
  :group 'SQL)

;; Customization for Linter

(defcustom sql-linter-program "inl"
  "*Command to start inl by RELEX.

Starts `sql-interactive-mode' after doing some setup."
  :type 'file
  :group 'SQL)

(defcustom sql-linter-options nil
  "*List of additional options for `sql-linter-program'."
  :type '(repeat string)
  :version "21.3"
  :group 'SQL)

\f

;;; Variables which do not need customization

(defvar sql-user-history nil
  "History of usernames used.")

(defvar sql-database-history nil
  "History of databases used.")

(defvar sql-server-history nil
  "History of servers used.")

;; Passwords are not kept in a history.

(defvar sql-buffer nil
  "Current SQLi buffer.

The global value of sql-buffer is the name of the latest SQLi buffer
created.  Any SQL buffer created will make a local copy of this value.
See `sql-interactive-mode' for more on multiple sessions.  If you want
to change the SQLi buffer a SQL mode sends its SQL strings to, change
the local value of `sql-buffer' using \\[sql-set-sqli-buffer].")

(defvar sql-prompt-regexp nil
  "Prompt used to initialize `comint-prompt-regexp'.

You can change `comint-prompt-regexp' on `sql-interactive-mode-hook'.")

(defvar sql-prompt-length 0
  "Prompt used to set `left-margin' in `sql-interactive-mode'.

You can change it on `sql-interactive-mode-hook'.")

(defvar sql-alternate-buffer-name nil
  "Buffer-local string used to possibly rename the SQLi buffer.

Used by `sql-rename-buffer'.")

;; Keymap for sql-interactive-mode.

(defvar sql-interactive-mode-map
  (let ((map (make-sparse-keymap)))
    (if (functionp 'set-keymap-parent)
        (set-keymap-parent map comint-mode-map); Emacs
      (set-keymap-parents map (list comint-mode-map))); XEmacs
    (if (functionp 'set-keymap-name)
        (set-keymap-name map 'sql-interactive-mode-map)); XEmacs
    (define-key map (kbd "C-j") 'sql-accumulate-and-indent)
    (define-key map (kbd "C-c C-w") 'sql-copy-column)
    (define-key map (kbd "O") 'sql-magic-go)
    (define-key map (kbd "o") 'sql-magic-go)
    (define-key map (kbd ";") 'sql-magic-semicolon)
    map)
  "Mode map used for `sql-interactive-mode'.
Based on `comint-mode-map'.")

;; Keymap for sql-mode.

(defvar sql-mode-map
  (let ((map (make-sparse-keymap)))
    (define-key map (kbd "C-c C-c") 'sql-send-paragraph)
    (define-key map (kbd "C-c C-r") 'sql-send-region)
    (define-key map (kbd "C-c C-b") 'sql-send-buffer)
    map)
  "Mode map used for `sql-mode'.")

;; easy menu for sql-mode.

(easy-menu-define
 sql-mode-menu sql-mode-map
 "Menu for `sql-mode'."
 '("SQL"
   ["Send Paragraph" sql-send-paragraph (and (buffer-live-p sql-buffer)
                                             (get-buffer-process sql-buffer))]
   ["Send Region" sql-send-region (and (or (and (boundp 'mark-active); Emacs
                                                mark-active)
                                           (mark)); XEmacs
                                       (buffer-live-p sql-buffer)
                                       (get-buffer-process sql-buffer))]
   ["Send Buffer" sql-send-buffer (and (buffer-live-p sql-buffer)
                                       (get-buffer-process sql-buffer))]
   ["Show SQLi buffer" sql-show-sqli-buffer t]
   ["Set SQLi buffer" sql-set-sqli-buffer t]
   ["Pop to SQLi buffer after send"
    sql-toggle-pop-to-buffer-after-send-region
    :style toggle
    :selected sql-pop-to-buffer-after-send-region]
   ("Highlighting"
    ["ANSI SQL keywords" sql-highlight-ansi-keywords t]
    ["Oracle keywords" sql-highlight-oracle-keywords t]
    ["Postgres keywords" sql-highlight-postgres-keywords t]
    ["Linter keywords" sql-highlight-linter-keywords t]
    )))

;; easy menu for sql-interactive-mode.

(easy-menu-define
 sql-interactive-mode-menu sql-interactive-mode-map
 "Menu for `sql-interactive-mode'."
 '("SQL"
   ["Rename Buffer" sql-rename-buffer t]))

;; Abbreviations -- if you want more of them, define them in your
;; ~/.emacs file.  Abbrevs have to be enabled in your ~/.emacs, too.

(defvar sql-mode-abbrev-table nil
  "Abbrev table used in `sql-mode' and `sql-interactive-mode'.")
(if sql-mode-abbrev-table
    ()
  (let ((wrapper))
    (define-abbrev-table 'sql-mode-abbrev-table ())
    (define-abbrev sql-mode-abbrev-table  "ins" "insert")
    (define-abbrev sql-mode-abbrev-table  "upd" "update")
    (define-abbrev sql-mode-abbrev-table  "del" "delete")
    (define-abbrev sql-mode-abbrev-table  "sel" "select")))

;; Syntax Table

(defvar sql-mode-syntax-table
  (let ((table (make-syntax-table)))
    ;; C-style comments /**/ (see elisp manual "Syntax Flags"))
    (modify-syntax-entry ?/ ". 14" table)
    (modify-syntax-entry ?* ". 23" table)
    ;; double-dash starts comment
    (if (string-match "XEmacs\\|Lucid" emacs-version)
        (modify-syntax-entry ?- ". 56" table)
      (modify-syntax-entry ?- ". 12b" table))
    ;; newline and formfeed end coments
    (modify-syntax-entry ?\n "> b" table)
    (modify-syntax-entry ?\f "> b" table)
    ;; single quotes (') quotes delimit strings
    (modify-syntax-entry ?' "\"" table)
    ;; backslash is no escape character
    (modify-syntax-entry ?\\ "." table)
    table)
  "Syntax table used in `sql-mode' and `sql-interactive-mode'.")

;; Font lock support

(defvar sql-mode-ansi-font-lock-keywords nil
  "ANSI SQL keywords used by font-lock.

This variable is used by `sql-mode' and `sql-interactive-mode'.  The
regular expressions are created during compilation by calling the
function `regexp-opt'.  Therefore, take a look at the source before
you define your own sql-mode-ansi-font-lock-keywords.  You may want to
add functions and PL/SQL keywords.")
(if sql-mode-ansi-font-lock-keywords
    ()
  (let ((ansi-keywords (eval-when-compile
                         (concat "\\b"
                                 (regexp-opt '(
"authorization" "avg" "begin" "close" "cobol" "commit"
"continue" "count" "declare" "double" "end" "escape"
"exec" "fetch" "foreign" "fortran" "found" "go" "goto" "indicator"
"key" "language" "max" "min" "module" "numeric" "open" "pascal" "pli"
"precision" "primary" "procedure" "references" "rollback"
"schema" "section" "some" "sqlcode" "sqlerror" "sum" "work") t) "\\b")))
        (ansi-reserved-words (eval-when-compile
                               (concat "\\b"
                                       (regexp-opt '(
"all" "and" "any" "as" "asc" "between" "by" "check" "create"
"current" "default" "delete" "desc" "distinct" "exists" "float" "for"
"from" "grant" "group" "having" "in" "insert" "into" "is"
"like" "not" "null" "of" "on" "option" "or" "order" "privileges"
"public" "select" "set" "table" "to" "union" "unique"
"update" "user" "values" "view" "where" "with") t) "\\b")))
        (ansi-types (eval-when-compile
                      (concat "\\b"
                              (regexp-opt '(
;; ANSI Keywords that look like types
"character" "cursor" "dec" "int" "real"
;; ANSI Reserved Word that look like types
"char" "integer" "smallint" ) t) "\\b"))))
    (setq sql-mode-ansi-font-lock-keywords
          (list (cons ansi-keywords 'font-lock-function-name-face)
                (cons ansi-reserved-words 'font-lock-keyword-face)
                (cons ansi-types 'font-lock-type-face)))))

(defvar sql-mode-oracle-font-lock-keywords nil
  "Oracle SQL keywords used by font-lock.

This variable is used by `sql-mode' and `sql-interactive-mode'.  The
regular expressions are created during compilation by calling the
function `regexp-opt'.  Therefore, take a look at the source before
you define your own sql-mode-oracle-font-lock-keywords.  You may want
to add functions and PL/SQL keywords.")
(if sql-mode-oracle-font-lock-keywords
    ()
  (let ((oracle-keywords (eval-when-compile
                           (concat "\\b"
                                   (regexp-opt '(
"admin" "after" "allocate" "analyze" "archive" "archivelog" "backup"
"become" "before" "block" "body" "cache" "cancel" "cascade" "change"
"checkpoint" "compile" "constraint" "constraints" "contents"
"controlfile" "cycle" "database" "datafile" "dba" "disable" "dismount"
"dump" "each" "else" "elsif" "enable" "events" "except" "exceptions"
"execute" "exit" "explain" "extent" "externally" "false" "flush" "force"
"freelist" "freelists" "function" "groups" "if" "including" "initrans"
"instance" "layer" "link" "lists" "logfile" "loop" "manage" "manual"
"maxdatafiles" "maxinistances" "maxlogfiles" "maxloghistory"
"maxlogmembers" "maxtrans" "maxvalue" "minextents" "minvalue" "mount"
"new" "next" "noarchivelog" "nocache" "nocycle" "nomaxvalue"
"nominvalue" "none" "noorder" "noresetlogs" "normal" "nosort" "off"
"old" "only" "optimal" "others" "out" "own" "package" "parallel"
"pctincrease" "pctused" "plan" "pragma" "private" "profile" "quota"
"raise" "read" "recover" "referencing" "resetlogs" "restrict_references"
"restricted" "return" "returning" "reuse" "rnds" "rnps" "role" "roles"
"savepoint" "scn" "segment" "sequence" "shared" "snapshot" "sort"
"statement_id" "statistics" "stop" "storage" "subtype" "switch" "system"
"tables" "tablespace" "temporary" "thread" "time" "tracing"
"transaction" "triggers" "true" "truncate" "type" "under" "unlimited"
"until" "use" "using" "when" "while" "wnds" "wnps" "write") t) "\\b")))
        (oracle-warning-words (eval-when-compile
                                 (concat "\\b"
                                         (regexp-opt '(
"cursor_already_open" "dup_val_on_index" "exception" "invalid_cursor"
"invalid_number" "login_denied" "no_data_found" "not_logged_on"
"notfound" "others" "pragma" "program_error" "storage_error"
"timeout_on_resource" "too_many_rows" "transaction_backed_out"
"value_error" "zero_divide") t) "\\b")))
        (oracle-reserved-words (eval-when-compile
                                 (concat "\\b"
                                         (regexp-opt '(
"access" "add" "alter" "audit" "cluster" "column" "comment" "compress"
"connect" "drop" "else" "exclusive" "file" "grant"
"identified" "immediate" "increment" "index" "initial" "intersect"
"level" "lock" "long" "maxextents" "minus" "mode" "modify" "noaudit"
"nocompress" "nowait" "number" "offline" "online" "pctfree" "prior"
"raw" "rename" "resource" "revoke" "row" "rowlabel" "rownum"
"rows" "session" "share" "size" "start" "successful" "synonym" "sysdate"
"then" "trigger" "uid" "validate" "whenever") t) "\\b")))
        (oracle-types (eval-when-compile
                        (concat "\\b"
                                (regexp-opt '(
;; Oracle Keywords that look like types
;; Oracle Reserved Words that look like types
"binary_integer" "blob" "boolean" "constant" "date" "decimal" "rowid"
"varchar" "varchar2") t) "\\b")))
        (oracle-builtin-functions (eval-when-compile
                        (concat "\\b"
                                (regexp-opt '(
;; Misc Oracle builtin functions
"abs" "add_months" "ascii" "avg" "ceil" "chartorowid" "chr" "concat"
"convert" "cos" "cosh" "count" "currval" "decode" "dump" "exp" "floor"
"glb" "greatest" "greatest_lb" "hextoraw" "initcap" "instr" "instrb"
"last_day" "least" "least_ub" "length" "lengthb" "ln" "log" "lower"
"lpad" "ltrim" "lub" "max" "min" "mod" "months_between" "new_time"
"next_day" "nextval" "nls_initcap" "nls_lower" "nls_upper" "nlssort"
"nvl" "power" "rawtohex" "replace" "round" "rowidtochar" "rpad"
"rtrim" "sign" "sin" "sinh" "soundex" "sqlcode" "sqlerrm" "sqrt"
"stddev" "sum" "substr" "substrb" "tan" "tanh" "to_char"
"to_date" "to_label" "to_multi_byte" "to_number" "to_single_byte"
"translate" "trim" "trunc" "uid" "upper" "userenv" "variance" "vsize") t) "\\b"))))
    (setq sql-mode-oracle-font-lock-keywords
          (append sql-mode-ansi-font-lock-keywords
                  (list (cons oracle-keywords 'font-lock-function-name-face)
                        (cons oracle-warning-words 'font-lock-warning-face)
                        (cons oracle-reserved-words 'font-lock-keyword-face)
                        ;; XEmacs doesn't have font-lock-builtin-face
                        (if (string-match "XEmacs\\|Lucid" emacs-version)
                            (cons oracle-builtin-functions 'font-lock-preprocessor-face)
                          ;; GNU Emacs 19 doesn't have it either
                          (if (string-match "GNU Emacs 19" emacs-version)
                              (cons oracle-builtin-functions 'font-lock-function-name-face)
                            ;; Emacs
                            (cons oracle-builtin-functions 'font-lock-builtin-face)))
                        (cons oracle-types 'font-lock-type-face))))))

(defvar sql-mode-postgres-font-lock-keywords nil
  "Postgres SQL keywords used by font-lock.

This variable is used by `sql-mode' and `sql-interactive-mode'.  The
regular expressions are created during compilation by calling the
function `regexp-opt'.  Therefore, take a look at the source before
you define your own sql-mode-postgres-font-lock-keywords.")

(if sql-mode-postgres-font-lock-keywords
    ()
  (let ((postgres-reserved-words (eval-when-compile
                                 (concat "\\b"
                                         (regexp-opt '(
"language"
) t) "\\b")))
        (postgres-types (eval-when-compile
                          (concat "\\b"
                                  (regexp-opt '(
"bool" "box" "circle" "char" "char2" "char4" "char8" "char16" "date"
"float4" "float8" "int2" "int4" "int8" "line" "lseg" "money" "path"
"point" "polygon" "serial" "text" "time" "timespan" "timestamp" "varchar"
) t)"\\b")))
        (postgres-builtin-functions (eval-when-compile
                        (concat "\\b"
                                (regexp-opt '(
;; Misc Postgres builtin functions
"abstime" "age" "area" "box" "center" "date_part" "date_trunc"
"datetime" "dexp" "diameter" "dpow" "float" "float4" "height"
"initcap" "integer" "isclosed" "isfinite" "isoldpath" "isopen"
"length" "lower" "lpad" "ltrim" "pclose" "point" "points" "popen"
"position" "radius" "reltime" "revertpoly" "rpad" "rtrim" "substr"
"substring" "text" "timespan" "translate" "trim" "upgradepath"
"upgradepoly" "upper" "varchar" "width"
) t) "\\b"))))
    (setq sql-mode-postgres-font-lock-keywords
          (append sql-mode-ansi-font-lock-keywords
                  (list (cons postgres-reserved-words 'font-lock-keyword-face)
                        ;; XEmacs doesn't have 'font-lock-builtin-face
                        (if (string-match "XEmacs\\|Lucid" emacs-version)
                            (cons postgres-builtin-functions 'font-lock-preprocessor-face)
                          ;; Emacs
                          (cons postgres-builtin-functions 'font-lock-builtin-face))
                        (cons postgres-types 'font-lock-type-face))))))


(defvar sql-mode-linter-font-lock-keywords nil
  "Linter SQL keywords used by font-lock.

This variable is used by `sql-mode' and `sql-interactive-mode'.  The
regular expressions are created during compilation by calling the
function `regexp-opt'.")

(if sql-mode-linter-font-lock-keywords
    ()
  (let ((linter-keywords (eval-when-compile
                           (concat "\\b"
                                   (regexp-opt '(
"autocommit" "autoinc" "autorowid" "cancel" "cascade" "channel"
"committed" "count" "countblob" "cross" "current" "data" "database"
"datafile" "datafiles" "datesplit" "dba" "dbname" "default" "deferred"
"denied" "description" "device" "difference" "directory" "error"
"escape" "euc" "exclusive" "external" "extfile" "false" "file"
"filename" "filesize" "filetime" "filter" "findblob" "first" "foreign"
"full" "fuzzy" "global" "granted" "ignore" "immediate" "increment"
"indexes" "indexfile" "indexfiles" "indextime" "initial" "integrity"
"internal" "key" "last_autoinc" "last_rowid" "limit" "linter"
"linter_file_device" "linter_file_size" "linter_name_length" "ln"
"local" "login" "maxisn" "maxrow" "maxrowid" "maxvalue" "message"
"minvalue" "module" "names" "national" "natural" "new" "new_table"
"no" "node" "noneuc" "nulliferror" "numbers" "off" "old" "old_table"
"only" "operation" "optimistic" "option" "page" "partially" "password"
"phrase" "plan" "precision" "primary" "priority" "privileges"
"proc_info_size" "proc_par_name_len" "protocol" "quant" "range" "raw"
"read" "record" "records" "references" "remote" "rename" "replication"
"restart" "rewrite" "root" "row" "rule" "savepoint" "security"
"sensitive" "sequence" "serializable" "server" "since" "size" "some"
"startup" "statement" "station" "success" "sys_guid" "tables" "test"
"timeout" "trace" "transaction" "translation" "trigger"
"trigger_info_size" "true" "trunc" "uncommitted" "unicode" "unknown"
"unlimited" "unlisted" "user" "utf8" "value" "varying" "volumes"
"wait" "windows_code" "workspace" "write" "xml"
) t) "\\b")))
        (linter-reserved-words (eval-when-compile
                                 (concat "\\b"
                                         (regexp-opt '(
"access" "action" "add" "address" "after" "all" "alter" "always" "and"
"any" "append" "as" "asc" "ascic" "async" "at_begin" "at_end" "audit"
"aud_obj_name_len" "backup" "base" "before" "between" "blobfile"
"blobfiles" "blobpct" "brief" "browse" "by" "case" "cast" "check"
"clear" "close" "column" "comment" "commit" "connect" "contains"
"correct" "create" "delete" "desc" "disable" "disconnect" "distinct"
"drop" "each" "ef" "else" "enable" "end" "event" "except" "exclude"
"execute" "exists" "extract" "fetch" "finish" "for" "from" "get"
"grant" "group" "having" "identified" "in" "index" "inner" "insert"
"instead" "intersect" "into" "is" "isolation" "join" "left" "level"
"like" "lock" "mode" "modify" "not" "nowait" "null" "of" "on" "open"
"or" "order" "outer" "owner" "press" "prior" "procedure" "public"
"purge" "rebuild" "resource" "restrict" "revoke" "right" "role"
"rollback" "rownum" "select" "session" "set" "share" "shutdown"
"start" "stop" "sync" "synchronize" "synonym" "sysdate" "table" "then"
"to" "union" "unique" "unlock" "until" "update" "using" "values"
"view" "when" "where" "with" "without"
) t) "\\b")))
        (linter-types (eval-when-compile
                        (concat "\\b"
                                (regexp-opt '(
"bigint" "bitmap" "blob" "boolean" "char" "character" "date"
"datetime" "dec" "decimal" "double" "float" "int" "integer" "nchar"
"number" "numeric" "real" "smallint" "varbyte" "varchar" "byte"
"cursor" "long"
) t) "\\b")))
        (linter-builtin-functions (eval-when-compile
                        (concat "\\b"
                                (regexp-opt '(
"abs" "acos" "asin" "atan" "atan2" "avg" "ceil" "cos" "cosh" "divtime"
"exp" "floor" "getbits" "getblob" "getbyte" "getlong" "getraw"
"getstr" "gettext" "getword" "hextoraw" "lenblob" "length" "log"
"lower" "lpad" "ltrim" "max" "min" "mod" "monthname" "nvl"
"octet_length" "power" "rand" "rawtohex" "repeat_string"
"right_substr" "round" "rpad" "rtrim" "sign" "sin" "sinh" "soundex"
"sqrt" "sum" "tan" "tanh" "timeint_to_days" "to_char" "to_date"
"to_gmtime" "to_localtime" "to_number" "trim" "upper" "decode"
"substr" "substring" "chr" "dayname" "days" "greatest" "hex" "initcap"
"instr" "least" "multime" "replace" "width"
) t) "\\b"))))
    (setq sql-mode-linter-font-lock-keywords
          (append sql-mode-ansi-font-lock-keywords
                  (list (cons linter-keywords 'font-lock-function-name-face)
                        (cons linter-reserved-words 'font-lock-keyword-face)
                        ;; XEmacs doesn't have font-lock-builtin-face
                        (if (string-match "XEmacs\\|Lucid" emacs-version)
                            (cons linter-builtin-functions 'font-lock-preprocessor-face)
                          ;; GNU Emacs 19 doesn't have it either
                          (if (string-match "GNU Emacs 19" emacs-version)
                              (cons linter-builtin-functions 'font-lock-function-name-face)
                            ;; Emacs
                            (cons linter-builtin-functions 'font-lock-builtin-face)))
                        (cons linter-types 'font-lock-type-face))))))

(defvar sql-mode-font-lock-keywords sql-mode-ansi-font-lock-keywords
  "SQL keywords used by font-lock.

This variable defaults to `sql-mode-ansi-font-lock-keywords'.  This is
used for the default `font-lock-defaults' value in `sql-mode'.  This
can be changed by some entry functions to provide more hilighting.")

\f

;;; Functions to switch highlighting

(defun sql-highlight-oracle-keywords ()
  "Highlight Oracle keywords.
Basically, this just sets `font-lock-keywords' appropriately."
  (interactive)
  (setq font-lock-keywords sql-mode-oracle-font-lock-keywords)
  (font-lock-fontify-buffer))

(defun sql-highlight-postgres-keywords ()
  "Highlight Postgres keywords.
Basically, this just sets `font-lock-keywords' appropriately."
  (interactive)
  (setq font-lock-keywords sql-mode-postgres-font-lock-keywords)
  (font-lock-fontify-buffer))

(defun sql-highlight-linter-keywords ()
  "Highlight LINTER keywords.
Basically, this just sets `font-lock-keywords' appropriately."
  (interactive)
  (setq font-lock-keywords sql-mode-linter-font-lock-keywords)
  (font-lock-fontify-buffer))

(defun sql-highlight-ansi-keywords ()
  "Highlight ANSI SQL keywords.
Basically, this just sets `font-lock-keywords' appropriately."
  (interactive)
  (setq font-lock-keywords sql-mode-ansi-font-lock-keywords)
  (font-lock-fontify-buffer))

\f

;;; Compatibility functions

(if (not (fboundp 'comint-line-beginning-position))
    ;; comint-line-beginning-position is defined in Emacs 21
    (defun comint-line-beginning-position ()
      "Returns the buffer position of the beginning of the line, after any prompt.
The prompt is assumed to be any text at the beginning of the line matching
the regular expression `comint-prompt-regexp', a buffer local variable."
      (save-excursion (comint-bol nil) (point))))

\f

;;; Small functions

(defun sql-magic-go (arg)
  "Insert \"o\" and call `comint-send-input'.
`sql-electric-stuff' must be the symbol `go'."
  (interactive "P")
  (self-insert-command (prefix-numeric-value arg))
  (if (and (equal sql-electric-stuff 'go)
           (save-excursion
             (comint-bol nil)
             (looking-at "go\\b")))
      (comint-send-input)))

(defun sql-magic-semicolon (arg)
  "Insert semicolon and call `comint-send-input'.
`sql-electric-stuff' must be the symbol `semicolon'."
  (interactive "P")
  (self-insert-command (prefix-numeric-value arg))
  (if (equal sql-electric-stuff 'semicolon)
       (comint-send-input)))

(defun sql-accumulate-and-indent ()
  "Continue SQL statement on the next line."
  (interactive)
  (if (fboundp 'comint-accumulate)
      (comint-accumulate)
    (newline))
  (indent-according-to-mode))

;;;###autoload
(defun sql-help ()
  "Show short help for the SQL modes.

Use an entry function to open an interactive SQL buffer.  This buffer is
usually named `*SQL*'.  The name of the major mode is SQLi.

Use the following commands to start a specific SQL interpreter:

    PostGres: \\[sql-postgres]
    MySQL: \\[sql-mysql]
    SQLite: \\[sql-sqlite]

Other non-free SQL implementations are also supported:

    Solid: \\[sql-solid]
    Oracle: \\[sql-oracle]
    Informix: \\[sql-informix]
    Sybase: \\[sql-sybase]
    Ingres: \\[sql-ingres]
    Microsoft: \\[sql-ms]
    Interbase: \\[sql-interbase]
    Linter: \\[sql-linter]

But we urge you to choose a free implementation instead of these.

Once you have the SQLi buffer, you can enter SQL statements in the
buffer.  The output generated is appended to the buffer and a new prompt
is generated.  See the In/Out menu in the SQLi buffer for some functions
that help you navigate through the buffer, the input history, etc.

If you have a really complex SQL statement or if you are writing a
procedure, you can do this in a separate buffer.  Put the new buffer in
`sql-mode' by calling \\[sql-mode].  The name of this buffer can be
anything.  The name of the major mode is SQL.

In this SQL buffer (SQL mode), you can send the region or the entire
buffer to the interactive SQL buffer (SQLi mode).  The results are
appended to the SQLi buffer without disturbing your SQL buffer."
  (interactive)
  (describe-function 'sql-help))

(defun sql-read-passwd (prompt &optional default)
  "Read a password using PROMPT.
Optional DEFAULT is password to start with.  This function calls
`read-passwd' if it is available.  If not, function
`ange-ftp-read-passwd' is called.  This should always be available,
even in old versions of Emacs."
  (if (fboundp 'read-passwd)
      (read-passwd prompt nil default)
    (unless (fboundp 'ange-ftp-read-passwd)
      (autoload 'ange-ftp-read-passwd "ange-ftp"))
    (ange-ftp-read-passwd prompt default)))

(defun sql-get-login (&rest what)
  "Get username, password and database from the user.

The variables `sql-user', `sql-password', `sql-server', and
`sql-database' can be customized.  They are used as the default values.
Usernames, servers and databases are stored in `sql-user-history',
`sql-server-history' and `database-history'.  Passwords are not stored
in a history.

Parameter WHAT is a list of the arguments passed to this function.
The function asks for the username if WHAT contains symbol `user', for
the password if it contains symbol `password', for the server if it
contains symbol `server', and for the database if it contains symbol
`database'.

In order to ask the user for username, password and database, call the
function like this: (sql-get-login 'user 'password 'database)."
  (interactive)
  (if (memq 'user what)
      (setq sql-user
            (read-from-minibuffer "User: " sql-user nil nil
                                  sql-user-history)))
  (if (memq 'password what)
      (setq sql-password
            (sql-read-passwd "Password: " sql-password)))
  (if (memq 'server what)
      (setq sql-server
            (read-from-minibuffer "Server: " sql-server nil nil
                                  sql-server-history)))
  (if (memq 'database what)
      (setq sql-database
            (read-from-minibuffer "Database: " sql-database nil nil
                                  sql-database-history))))

(defun sql-find-sqli-buffer ()
  "Return the current default SQLi buffer or nil.
In order to qualify, the SQLi buffer must be alive,
be in `sql-interactive-mode' and have a process."
  (let ((default-buffer (default-value 'sql-buffer)))
    (if (and (buffer-live-p default-buffer)
             (get-buffer-process default-buffer))
        default-buffer
      (save-excursion
        (let ((buflist (buffer-list))
              (found))
          (while (not (or (null buflist)
                          found))
            (let ((candidate (car buflist)))
              (set-buffer candidate)
              (if (and (equal major-mode 'sql-interactive-mode)
                       (get-buffer-process candidate))
                  (setq found candidate))
              (setq buflist (cdr buflist))))
          found)))))

(defun sql-set-sqli-buffer-generally ()
  "Set SQLi buffer for all SQL buffers that have none.
This function checks all SQL buffers for their SQLi buffer.  If their
SQLi buffer is nonexistent or has no process, it is set to the current
default SQLi buffer.  The current default SQLi buffer is determined
using `sql-find-sqli-buffer'.  If `sql-buffer' is set,
`sql-set-sqli-hook' is run."
  (interactive)
  (save-excursion
    (let ((buflist (buffer-list))
          (default-sqli-buffer (sql-find-sqli-buffer)))
      (setq-default sql-buffer default-sqli-buffer)
      (while (not (null buflist))
        (let ((candidate (car buflist)))
          (set-buffer candidate)
          (if (and (equal major-mode 'sql-mode)
                   (not (buffer-live-p sql-buffer)))
              (progn
                (setq sql-buffer default-sqli-buffer)
                (run-hooks 'sql-set-sqli-hook))))
        (setq buflist (cdr buflist))))))

(defun sql-set-sqli-buffer ()
  "Set the SQLi buffer SQL strings are sent to.

Call this function in a SQL buffer in order to set the SQLi buffer SQL
strings are sent to.  Calling this function sets `sql-buffer' and runs
`sql-set-sqli-hook'.

If you call it from a SQL buffer, this sets the local copy of
`sql-buffer'.

If you call it from anywhere else, it sets the global copy of
`sql-buffer'."
  (interactive)
  (let ((default-buffer (sql-find-sqli-buffer)))
    (if (null default-buffer)
        (error "There is no suitable SQLi buffer"))
    (let ((new-buffer
           (get-buffer
            (read-buffer "New SQLi buffer: " default-buffer t))))
      (if (null (get-buffer-process new-buffer))
          (error "Buffer %s has no process" (buffer-name new-buffer)))
      (if (null (save-excursion
                  (set-buffer new-buffer)
                  (equal major-mode 'sql-interactive-mode)))
          (error "Buffer %s is no SQLi buffer" (buffer-name new-buffer)))
      (if new-buffer
          (progn
            (setq sql-buffer new-buffer)
            (run-hooks 'sql-set-sqli-hook))))))

(defun sql-show-sqli-buffer ()
  "Show the name of current SQLi buffer.

This is the buffer SQL strings are sent to.  It is stored in the
variable `sql-buffer'.  See `sql-help' on how to create such a buffer."
  (interactive)
  (if (null (buffer-live-p sql-buffer))
      (message "%s has no SQLi buffer set." (buffer-name (current-buffer)))
    (if (null (get-buffer-process sql-buffer))
        (message "Buffer %s has no process." (buffer-name sql-buffer))
      (message "Current SQLi buffer is %s." (buffer-name sql-buffer)))))

(defun sql-make-alternate-buffer-name ()
  "Return a string that can be used to rename a SQLi buffer.

This is used to set `sql-alternate-buffer-name' within
`sql-interactive-mode'."
  (concat (if (string= "" sql-user)
              (if (string= "" (user-login-name))
                  ()
                (concat (user-login-name) "/"))
            (concat sql-user "/"))
          (if (string= "" sql-database)
              (if (string= "" sql-server)
                  (system-name)
                sql-server)
            sql-database)))

(defun sql-rename-buffer ()
  "Renames a SQLi buffer."
  (interactive)
  (rename-buffer (format "*SQL: %s*" sql-alternate-buffer-name) t))

(defun sql-copy-column ()
  "Copy current column to the end of buffer.
Inserts SELECT or commas if appropriate."
  (interactive)
  (let ((column))
    (save-excursion
      (setq column (buffer-substring
                  (progn (forward-char 1) (backward-sexp 1) (point))
                  (progn (forward-sexp 1) (point))))
      (goto-char (point-max))
      (let ((bol (comint-line-beginning-position)))
        (cond
         ;; if empty command line, insert SELECT
         ((= bol (point))
          (insert "SELECT "))
         ;; else if appending to INTO .* (, SELECT or ORDER BY, insert a comma
         ((save-excursion
            (re-search-backward "\\b\\(\\(into\\s-+\\S-+\\s-+(\\)\\|select\\|order by\\) .+"
                                bol t))
          (insert ", "))
         ;; else insert a space
         (t
          (if (eq (preceding-char) ? )
              nil
            (insert " ")))))
      ;; in any case, insert the column
      (insert column)
      (message "%s" column))))

;; On NT, SQL*Plus for Oracle turns on full buffering for stdout if it
;; is not attached to a character device; therefore placeholder
;; replacement by SQL*Plus is fully buffered.  The workaround lets
;; Emacs query for the placeholders.

(defvar sql-placeholder-history nil
  "History of placeholder values used.")

(defun sql-query-placeholders-and-send (proc string)
  "Send to PROC input STRING, maybe replacing placeholders.
Placeholders are words starting with and ampersand like &this.
This function is used for `comint-input-sender' if using `sql-oracle' on NT."
  (while (string-match "&\\(\\sw+\\)" string)
    (setq string (replace-match
                  (read-from-minibuffer
                   (format "Enter value for %s: " (match-string 1 string))
                   nil nil nil sql-placeholder-history)
                  t t string)))
  (comint-send-string proc string)
  (if comint-input-sender-no-newline
      (if (not (string-equal string ""))
          (process-send-eof))
    (comint-send-string proc "\n")))

;; Using DB2 interactively, newlines must be escaped with " \".
;; The space before the backslash is relevant.
(defun sql-escape-newlines-and-send (proc string)
  "Send to PROC input STRING, escaping newlines if necessary.
Every newline in STRING will be preceded with a space and a backslash."
  (let ((result "") (start 0) mb me)
    (while (string-match "\n" string start)
      (setq mb (match-beginning 0)
            me (match-end 0))
      (if (and (> mb 1)
               (string-equal " \\" (substring string (- mb 2) mb)))
          (setq result (concat result (substring string start me)))
        (setq result (concat result (substring string start mb) " \\\n")))
      (setq start me))
    (setq result (concat result (substring string start)))
    (comint-send-string proc result)
    (if comint-input-sender-no-newline
        (if (not (string-equal string ""))
            (process-send-eof))
      (comint-send-string proc "\n"))))

\f

;;; Sending the region to the SQLi buffer.

(defun sql-send-region (start end)
  "Send a region to the SQL process."
  (interactive "r")
  (if (buffer-live-p sql-buffer)
      (save-excursion
        (comint-send-region sql-buffer start end)
        (if (string-match "\n$" (buffer-substring start end))
            ()
          (comint-send-string sql-buffer "\n"))
        (message "Sent string to buffer %s." (buffer-name sql-buffer))
        (if sql-pop-to-buffer-after-send-region
            (pop-to-buffer sql-buffer)
          (display-buffer sql-buffer)))
    (message "No SQL process started.")))

(defun sql-send-paragraph ()
  "Send the current paragraph to the SQL process."
  (interactive)
  (let ((start (save-excursion
                 (backward-paragraph)
                 (point)))
        (end (save-excursion
               (forward-paragraph)
               (point))))
    (sql-send-region start end)))

(defun sql-send-buffer ()
  "Send the buffer contents to the SQL process."
  (interactive)
  (sql-send-region (point-min) (point-max)))

(defun sql-toggle-pop-to-buffer-after-send-region (&optional value)
  "Toggle `sql-pop-to-buffer-after-send-region'.

If given the optional parameter VALUE, sets
sql-toggle-pop-to-buffer-after-send-region to VALUE."
  (interactive "P")
  (if value
      (setq sql-pop-to-buffer-after-send-region value)
    (setq sql-pop-to-buffer-after-send-region
          (null sql-pop-to-buffer-after-send-region ))))

\f

;;; SQL mode -- uses SQL interactive mode

;;;###autoload
(defun sql-mode ()
  "Major mode to edit SQL.

You can send SQL statements to the SQLi buffer using
\\[sql-send-region].  Such a buffer must exist before you can do this.
See `sql-help' on how to create SQLi buffers.

\\{sql-mode-map}
Customization: Entry to this mode runs the `sql-mode-hook'.

When you put a buffer in SQL mode, the buffer stores the last SQLi
buffer created as its destination in the variable `sql-buffer'.  This
will be the buffer \\[sql-send-region] sends the region to.  If this
SQLi buffer is killed, \\[sql-send-region] is no longer able to
determine where the strings should be sent to.  You can set the
value of `sql-buffer' using \\[sql-set-sqli-buffer].

For information on how to create multiple SQLi buffers, see
`sql-interactive-mode'.

Note that SQL doesn't have an escape character unless you specify
one.  If you specify backslash as escape character in SQL,
you must tell Emacs.  Here's how to do that in your `~/.emacs' file:

\(add-hook 'sql-mode-hook
          (lambda ()
            (modify-syntax-entry ?\\\\ \".\" sql-mode-syntax-table)))"
  (interactive)
  (kill-all-local-variables)
  (setq major-mode 'sql-mode)
  (setq mode-name "SQL")
  (use-local-map sql-mode-map)
  (if sql-mode-menu
      (easy-menu-add sql-mode-menu)); XEmacs
  (set-syntax-table sql-mode-syntax-table)
  (make-local-variable 'font-lock-defaults)
  ;; Note that making KEYWORDS-ONLY nil will cause havoc if you try
  ;; SELECT 'x' FROM DUAL with SQL*Plus, because the title of the column
  ;; will have just one quote.  Therefore syntactic hilighting is
  ;; disabled for interactive buffers.  `_' and `.' are considered part
  ;; of words.
  (setq font-lock-defaults '(sql-mode-font-lock-keywords
                             nil t ((?_ . "w") (?. . "w"))))
  (make-local-variable 'comment-start)
  (setq comment-start "--")
  ;; Make each buffer in sql-mode remember the "current" SQLi buffer.
  (make-local-variable 'sql-buffer)
  ;; Add imenu support for sql-mode.  Note that imenu-generic-expression
  ;; is buffer-local, so we don't need a local-variable for it.  SQL is
  ;; case-insensitive, that's why we have to set imenu-case-fold-search.
  ;; imenu-syntax-alist makes sure that `_' is considered part of object
  ;; names.
  (setq imenu-generic-expression sql-imenu-generic-expression
        imenu-case-fold-search t
        imenu-syntax-alist '(("_" . "w")))
  ;; Make `sql-send-paragraph' work on paragraphs that contain indented
  ;; lines.
  (make-local-variable 'paragraph-separate)
  (make-local-variable 'paragraph-start)
  (setq paragraph-separate "[\f]*$"
        paragraph-start "[\n\f]")
  ;; Abbrevs
  (setq local-abbrev-table sql-mode-abbrev-table)
  (setq abbrev-all-caps 1)
  ;; Run hook
  (run-hooks 'sql-mode-hook))

\f

;;; SQL interactive mode

(put 'sql-interactive-mode 'mode-class 'special)

(defun sql-interactive-mode ()
  "Major mode to use a SQL interpreter interactively.

Do not call this function by yourself.  The environment must be
initialized by an entry function specific for the SQL interpreter.  See
`sql-help' for a list of available entry functions.

\\[comint-send-input] after the end of the process' output sends the
text from the end of process to the end of the current line.
\\[comint-send-input] before end of process output copies the current
line minus the prompt to the end of the buffer and sends it.
\\[comint-copy-old-input] just copies the current line.
Use \\[sql-accumulate-and-indent] to enter multi-line statements.

If you want to make multiple SQL buffers, rename the `*SQL*' buffer
using \\[rename-buffer] or \\[rename-uniquely] and start a new process.
See `sql-help' for a list of available entry functions.  The last buffer
created by such an entry function is the current SQLi buffer.  SQL
buffers will send strings to the SQLi buffer current at the time of
their creation.  See `sql-mode' for details.

Sample session using two connections:

1. Create first SQLi buffer by calling an entry function.
2. Rename buffer \"*SQL*\" to \"*Connection 1*\".
3. Create a SQL buffer \"test1.sql\".
4. Create second SQLi buffer by calling an entry function.
5. Rename buffer \"*SQL*\" to \"*Connection 2*\".
6. Create a SQL buffer \"test2.sql\".

Now \\[sql-send-region] in buffer \"test1.sql\" will send the region to
buffer \"*Connection 1*\", \\[sql-send-region] in buffer \"test2.sql\"
will send the region to buffer \"*Connection 2*\".

If you accidentally suspend your process, use \\[comint-continue-subjob]
to continue it.  On some operating systems, this will not work because
the signals are not supported.

\\{sql-interactive-mode-map}
Customization: Entry to this mode runs the hooks on `comint-mode-hook'
and `sql-interactive-mode-hook' (in that order).  Before each input, the
hooks on `comint-input-filter-functions' are run.  After each SQL
interpreter output, the hooks on `comint-output-filter-functions' are
run.

Variable `sql-input-ring-file-name' controls the initialisation of the
input ring history.

Variables `comint-output-filter-functions', a hook, and
`comint-scroll-to-bottom-on-input' and
`comint-scroll-to-bottom-on-output' control whether input and output
cause the window to scroll to the end of the buffer.

If you want to make SQL buffers limited in length, add the function
`comint-truncate-buffer' to `comint-output-filter-functions'.

Here is an example for your .emacs file.  It keeps the SQLi buffer a
certain length.

\(add-hook 'sql-interactive-mode-hook
    \(function (lambda ()
        \(setq comint-output-filter-functions 'comint-truncate-buffer))))

Here is another example.  It will always put point back to the statement
you entered, right above the output it created.

\(setq comint-output-filter-functions
       \(function (lambda (STR) (comint-show-output))))"
  (comint-mode)
  (setq comint-prompt-regexp sql-prompt-regexp)
  (setq left-margin sql-prompt-length)
  (setq major-mode 'sql-interactive-mode)
  (setq mode-name "SQLi")
  (use-local-map sql-interactive-mode-map)
  (if sql-interactive-mode-menu
      (easy-menu-add sql-interactive-mode-menu)); XEmacs
  (set-syntax-table sql-mode-syntax-table)
  (make-local-variable 'font-lock-defaults)
  ;; Note that making KEYWORDS-ONLY nil will cause havoc if you try
  ;; SELECT 'x' FROM DUAL with SQL*Plus, because the title of the column
  ;; will have just one quote.  Therefore syntactic hilighting is
  ;; disabled for interactive buffers.  `_' and `.' are considered part
  ;; of words.
  (setq font-lock-defaults '(sql-mode-font-lock-keywords
                             t t ((?_ . "w") (?. . "w"))))
  ;; Enable commenting and uncommenting of the region.
  (make-local-variable 'comment-start)
  (setq comment-start "--")
  ;; Abbreviation table init and case-insensitive.  It is not activatet
  ;; by default.
  (setq local-abbrev-table sql-mode-abbrev-table)
  (setq abbrev-all-caps 1)
  ;; Exiting the process will call sql-stop.
  (set-process-sentinel (get-buffer-process sql-buffer) 'sql-stop)
  ;; People wanting a different history file for each
  ;; buffer/process/client/whatever can change separator and file-name
  ;; on the sql-interactive-mode-hook.
  (setq comint-input-ring-separator sql-input-ring-separator
        comint-input-ring-file-name sql-input-ring-file-name)
  ;; Create a usefull name for renaming this buffer later.
  (make-local-variable 'sql-alternate-buffer-name)
  (setq sql-alternate-buffer-name (sql-make-alternate-buffer-name))
  ;; User stuff.
  (run-hooks 'sql-interactive-mode-hook)
  ;; Calling the hook before calling comint-read-input-ring allows users
  ;; to set comint-input-ring-file-name in sql-interactive-mode-hook.
  (comint-read-input-ring t))

(defun sql-stop (process event)
  "Called when the SQL process is stopped.

Writes the input history to a history file using
`comint-write-input-ring' and inserts a short message in the SQL buffer.

This function is a sentinel watching the SQL interpreter process.
Sentinels will always get the two parameters PROCESS and EVENT."
  (comint-write-input-ring)
  (if (and (eq (current-buffer) sql-buffer)
           (not buffer-read-only))
      (insert (format "\nProcess %s %s\n" process event))
    (message "Process %s %s" process event)))

\f

;;; Entry functions for different SQL interpreters.

;;;###autoload
(defun sql-oracle ()
  "Run sqlplus by Oracle as an inferior process.

If buffer `*SQL*' exists but no process is running, make a new process.
If buffer exists and a process is running, just switch to buffer
`*SQL*'.

Interpreter used comes from variable `sql-oracle-program'.  Login uses
the variables `sql-user', `sql-password', and `sql-database' as
defaults, if set.  Additional command line parameters can be stored in
the list `sql-oracle-options'.

The buffer is put in sql-interactive-mode, giving commands for sending
input.  See `sql-interactive-mode'.

To specify a coding system for converting non-ASCII characters
in the input and output to the process, use \\[universal-coding-system-argument]
before \\[sql-oracle].  You can also specify this with \\[set-buffer-process-coding-system]
in the SQL buffer, after you start the process.
The default comes from `process-coding-system-alist' and
`default-process-coding-system'.

\(Type \\[describe-mode] in the SQL buffer for a list of commands.)"
  (interactive)
  (if (comint-check-proc "*SQL*")
      (pop-to-buffer "*SQL*")
    (sql-get-login 'user 'password 'database)
    (message "Login...")
    ;; Produce user/password@database construct.  Password without user
    ;; is meaningless; database without user/password is meaningless,
    ;; because "@param" will ask sqlplus to interpret the script
    ;; "param".
    (let ((parameter nil))
      (if (not (string= "" sql-user))
          (if (not (string= "" sql-password))
              (setq parameter (concat sql-user "/" sql-password))
            (setq parameter sql-user)))
      (if (and parameter (not (string= "" sql-database)))
          (setq parameter (concat parameter "@" sql-database)))
      (if parameter
          (setq parameter (nconc (list parameter) sql-oracle-options))
        (setq parameter sql-oracle-options))
      (if parameter
          (set-buffer (apply 'make-comint "SQL" sql-oracle-program nil
                             parameter))
        (set-buffer (make-comint "SQL" sql-oracle-program nil))))
    (setq sql-prompt-regexp "^SQL> ")
    (setq sql-prompt-length 5)
    (setq sql-buffer (current-buffer))
    ;; set sql-mode-font-lock-keywords to something different before
    ;; calling sql-interactive-mode.
    (setq sql-mode-font-lock-keywords sql-mode-oracle-font-lock-keywords)
    (sql-interactive-mode)
    ;; If running on NT, make sure we do placeholder replacement
    ;; ourselves.  This must come after sql-interactive-mode because all
    ;; local variables will be killed, there.
    (if (eq window-system 'w32)
        (setq comint-input-sender 'sql-query-placeholders-and-send))
    (message "Login...done")
    (pop-to-buffer sql-buffer)))

\f

;;;###autoload
(defun sql-sybase ()
  "Run isql by SyBase as an inferior process.

If buffer `*SQL*' exists but no process is running, make a new process.
If buffer exists and a process is running, just switch to buffer
`*SQL*'.

Interpreter used comes from variable `sql-sybase-program'.  Login uses
the variables `sql-server', `sql-user', `sql-password', and
`sql-database' as defaults, if set.  Additional command line parameters
can be stored in the list `sql-sybase-options'.

The buffer is put in sql-interactive-mode, giving commands for sending
input.  See `sql-interactive-mode'.

To specify a coding system for converting non-ASCII characters
in the input and output to the process, use \\[universal-coding-system-argument]
before \\[sql-sybase].  You can also specify this with \\[set-buffer-process-coding-system]
in the SQL buffer, after you start the process.
The default comes from `process-coding-system-alist' and
`default-process-coding-system'.

\(Type \\[describe-mode] in the SQL buffer for a list of commands.)"
  (interactive)
  (if (comint-check-proc "*SQL*")
      (pop-to-buffer "*SQL*")
    (sql-get-login 'server 'user 'password 'database)
    (message "Login...")
    ;; Put all parameters to the program (if defined) in a list and call
    ;; make-comint.
    (let ((params sql-sybase-options))
      (if (not (string= "" sql-server))
          (setq params (append (list "-S" sql-server) params)))
      (if (not (string= "" sql-database))
          (setq params (append (list "-D" sql-database) params)))
      (if (not (string= "" sql-password))
          (setq params (append (list "-P" sql-password) params)))
      (if (not (string= "" sql-user))
          (setq params (append (list "-U" sql-user) params)))
      (set-buffer (apply 'make-comint "SQL" sql-sybase-program
                         nil params)))
    (setq sql-prompt-regexp "^SQL> ")
    (setq sql-prompt-length 5)
    (setq sql-buffer (current-buffer))
    (sql-interactive-mode)
    (message "Login...done")
    (pop-to-buffer sql-buffer)))

\f

;;;###autoload
(defun sql-informix ()
  "Run dbaccess by Informix as an inferior process.

If buffer `*SQL*' exists but no process is running, make a new process.
If buffer exists and a process is running, just switch to buffer
`*SQL*'.

Interpreter used comes from variable `sql-informix-program'.  Login uses
the variable `sql-database' as default, if set.

The buffer is put in sql-interactive-mode, giving commands for sending
input.  See `sql-interactive-mode'.

To specify a coding system for converting non-ASCII characters
in the input and output to the process, use \\[universal-coding-system-argument]
before \\[sql-informix].  You can also specify this with \\[set-buffer-process-coding-system]
in the SQL buffer, after you start the process.
The default comes from `process-coding-system-alist' and
`default-process-coding-system'.

\(Type \\[describe-mode] in the SQL buffer for a list of commands.)"
  (interactive)
  (if (comint-check-proc "*SQL*")
      (pop-to-buffer "*SQL*")
    (sql-get-login 'database)
    (message "Login...")
    ;; username and password are ignored.
    (if (string= "" sql-database)
        (set-buffer (make-comint "SQL" sql-informix-program nil))
      (set-buffer (make-comint "SQL" sql-informix-program nil sql-database "-")))
    (setq sql-prompt-regexp "^SQL> ")
    (setq sql-prompt-length 5)
    (setq sql-buffer (current-buffer))
    (sql-interactive-mode)
    (message "Login...done")
    (pop-to-buffer sql-buffer)))

\f

;;;###autoload
(defun sql-sqlite ()
  "Run sqlite as an inferior process.

SQLite is free software.

If buffer `*SQL*' exists but no process is running, make a new process.
If buffer exists and a process is running, just switch to buffer
`*SQL*'.

Interpreter used comes from variable `sql-sqlite-program'.  Login uses
the variables `sql-user', `sql-password', `sql-database', and
`sql-server' as defaults, if set.  Additional command line parameters
can be stored in the list `sql-sqlite-options'.

The buffer is put in sql-interactive-mode, giving commands for sending
input.  See `sql-interactive-mode'.

To specify a coding system for converting non-ASCII characters
in the input and output to the process, use \\[universal-coding-system-argument]
before \\[sql-sqlite].  You can also specify this with \\[set-buffer-process-coding-system]
in the SQL buffer, after you start the process.
The default comes from `process-coding-system-alist' and
`default-process-coding-system'.

\(Type \\[describe-mode] in the SQL buffer for a list of commands.)"
  (interactive)
  (if (comint-check-proc "*SQL*")
      (pop-to-buffer "*SQL*")
    (sql-get-login 'database)
    (message "Login...")
    ;; Put all parameters to the program (if defined) in a list and call
    ;; make-comint.
    (let ((params))
      (if (not (string= "" sql-database))
          (setq params (append (list sql-database) params)))
      (if (not (string= "" sql-server))
          (setq params (append (list (concat "--host=" sql-server)) params)))
      (if (not (string= "" sql-password))
          (setq params (append (list (concat "--password=" sql-password)) params)))
      (if (not (string= "" sql-user))
          (setq params (append (list (concat "--user=" sql-user)) params)))
      (if (not (null sql-sqlite-options))
          (setq params (append sql-sqlite-options params)))
      (set-buffer (apply 'make-comint "SQL" sql-sqlite-program
                         nil params)))
    (setq sql-prompt-regexp "^sqlite> ")
    (setq sql-prompt-length 8)
    (setq sql-buffer (current-buffer))
    (sql-interactive-mode)
    (message "Login...done")
    (pop-to-buffer sql-buffer)))

\f

;;;###autoload
(defun sql-mysql ()
  "Run mysql by TcX as an inferior process.

Mysql versions 3.23 and up are free software.

If buffer `*SQL*' exists but no process is running, make a new process.
If buffer exists and a process is running, just switch to buffer
`*SQL*'.

Interpreter used comes from variable `sql-mysql-program'.  Login uses
the variables `sql-user', `sql-password', `sql-database', and
`sql-server' as defaults, if set.  Additional command line parameters
can be stored in the list `sql-mysql-options'.

The buffer is put in sql-interactive-mode, giving commands for sending
input.  See `sql-interactive-mode'.

To specify a coding system for converting non-ASCII characters
in the input and output to the process, use \\[universal-coding-system-argument]
before \\[sql-mysql].  You can also specify this with \\[set-buffer-process-coding-system]
in the SQL buffer, after you start the process.
The default comes from `process-coding-system-alist' and
`default-process-coding-system'.

\(Type \\[describe-mode] in the SQL buffer for a list of commands.)"
  (interactive)
  (if (comint-check-proc "*SQL*")
      (pop-to-buffer "*SQL*")
    (sql-get-login 'user 'password 'database 'server)
    (message "Login...")
    ;; Put all parameters to the program (if defined) in a list and call
    ;; make-comint.
    (let ((params))
      (if (not (string= "" sql-database))
          (setq params (append (list sql-database) params)))
      (if (not (string= "" sql-server))
          (setq params (append (list (concat "--host=" sql-server)) params)))
      (if (not (string= "" sql-password))
          (setq params (append (list (concat "--password=" sql-password)) params)))
      (if (not (string= "" sql-user))
          (setq params (append (list (concat "--user=" sql-user)) params)))
      (if (not (null sql-mysql-options))
          (setq params (append sql-mysql-options params)))
      (set-buffer (apply 'make-comint "SQL" sql-mysql-program
                         nil params)))
    (setq sql-prompt-regexp "^mysql>")
    (setq sql-prompt-length 6)
    (setq sql-buffer (current-buffer))
    (sql-interactive-mode)
    (message "Login...done")
    (pop-to-buffer sql-buffer)))

\f

;;;###autoload
(defun sql-solid ()
  "Run solsql by Solid as an inferior process.

If buffer `*SQL*' exists but no process is running, make a new process.
If buffer exists and a process is running, just switch to buffer
`*SQL*'.

Interpreter used comes from variable `sql-solid-program'.  Login uses
the variables `sql-user', `sql-password', and `sql-server' as
defaults, if set.

The buffer is put in sql-interactive-mode, giving commands for sending
input.  See `sql-interactive-mode'.

To specify a coding system for converting non-ASCII characters
in the input and output to the process, use \\[universal-coding-system-argument]
before \\[sql-solid].  You can also specify this with \\[set-buffer-process-coding-system]
in the SQL buffer, after you start the process.
The default comes from `process-coding-system-alist' and
`default-process-coding-system'.

\(Type \\[describe-mode] in the SQL buffer for a list of commands.)"
  (interactive)
  (if (comint-check-proc "*SQL*")
      (pop-to-buffer "*SQL*")
    (sql-get-login 'user 'password 'server)
    (message "Login...")
    ;; Put all parameters to the program (if defined) in a list and call
    ;; make-comint.
    (let ((params))
      ;; It only makes sense if both username and password are there.
      (if (not (or (string= "" sql-user)
                   (string= "" sql-password)))
          (setq params (append (list sql-user sql-password) params)))
      (if (not (string= "" sql-server))
          (setq params (append (list sql-server) params)))
      (set-buffer (apply 'make-comint "SQL" sql-solid-program
                         nil params)))
    (setq sql-prompt-regexp "^")
    (setq sql-prompt-length 0)
    (setq sql-buffer (current-buffer))
    (sql-interactive-mode)
    (message "Login...done")
    (pop-to-buffer sql-buffer)))

\f

;;;###autoload
(defun sql-ingres ()
  "Run sql by Ingres as an inferior process.

If buffer `*SQL*' exists but no process is running, make a new process.
If buffer exists and a process is running, just switch to buffer
`*SQL*'.

Interpreter used comes from variable `sql-ingres-program'.  Login uses
the variable `sql-database' as default, if set.

The buffer is put in sql-interactive-mode, giving commands for sending
input.  See `sql-interactive-mode'.

To specify a coding system for converting non-ASCII characters
in the input and output to the process, use \\[universal-coding-system-argument]
before \\[sql-ingres].  You can also specify this with \\[set-buffer-process-coding-system]
in the SQL buffer, after you start the process.
The default comes from `process-coding-system-alist' and
`default-process-coding-system'.

\(Type \\[describe-mode] in the SQL buffer for a list of commands.)"
  (interactive)
  (if (comint-check-proc "*SQL*")
      (pop-to-buffer "*SQL*")
    (sql-get-login 'database)
    (message "Login...")
    ;; username and password are ignored.
    (if (string= "" sql-database)
        (set-buffer (make-comint "SQL" sql-ingres-program nil))
      (set-buffer (make-comint "SQL" sql-ingres-program nil sql-database)))
    (setq sql-prompt-regexp "^\* ")
    (setq sql-prompt-length 2)
    (setq sql-buffer (current-buffer))
    (sql-interactive-mode)
    (message "Login...done")
    (pop-to-buffer sql-buffer)))

\f

;;;###autoload
(defun sql-ms ()
  "Run isql by Microsoft as an inferior process.

If buffer `*SQL*' exists but no process is running, make a new process.
If buffer exists and a process is running, just switch to buffer
`*SQL*'.

Interpreter used comes from variable `sql-ms-program'.  Login uses the
variables `sql-user', `sql-password', `sql-database', and `sql-server'
as defaults, if set.  Additional command line parameters can be stored
in the list `sql-ms-options'.

The buffer is put in sql-interactive-mode, giving commands for sending
input.  See `sql-interactive-mode'.

To specify a coding system for converting non-ASCII characters
in the input and output to the process, use \\[universal-coding-system-argument]
before \\[sql-ms].  You can also specify this with \\[set-buffer-process-coding-system]
in the SQL buffer, after you start the process.
The default comes from `process-coding-system-alist' and
`default-process-coding-system'.

\(Type \\[describe-mode] in the SQL buffer for a list of commands.)"
  (interactive)
  (if (comint-check-proc "*SQL*")
      (pop-to-buffer "*SQL*")
    (sql-get-login 'user 'password 'database 'server)
    (message "Login...")
    ;; Put all parameters to the program (if defined) in a list and call
    ;; make-comint.
    (let ((params sql-ms-options))
      (if (not (string= "" sql-server))
        (setq params (append (list "-S" sql-server) params)))
      (if (not (string= "" sql-database))
        (setq params (append (list "-d" sql-database) params)))
      (if (not (string= "" sql-user))
          (setq params (append (list "-U" sql-user) params)))
      (if (not (string= "" sql-password))
          (setq params (append (list "-P" sql-password) params))
        ;; If -P is passed to ISQL as the last argument without a password,
        ;; it's considered null.
        (setq params (append params (list "-P"))))
      (set-buffer (apply 'make-comint "SQL" sql-ms-program
                         nil params)))
    (setq sql-prompt-regexp "^[0-9]*>")
    (setq sql-prompt-length 5)
    (setq sql-buffer (current-buffer))
    (sql-interactive-mode)
    (message "Login...done")
    (pop-to-buffer sql-buffer)))

\f

;;;###autoload
(defun sql-postgres ()
  "Run psql by Postgres as an inferior process.

If buffer `*SQL*' exists but no process is running, make a new process.
If buffer exists and a process is running, just switch to buffer
`*SQL*'.

Interpreter used comes from variable `sql-postgres-program'.  Login uses
the variables `sql-database' and `sql-server' as default, if set.
Additional command line parameters can be stored in the list
`sql-postgres-options'.

The buffer is put in sql-interactive-mode, giving commands for sending
input.  See `sql-interactive-mode'.

To specify a coding system for converting non-ASCII characters
in the input and output to the process, use \\[universal-coding-system-argument]
before \\[sql-postgres].  You can also specify this with \\[set-buffer-process-coding-system]
in the SQL buffer, after you start the process.
The default comes from `process-coding-system-alist' and
`default-process-coding-system'.  If your output lines end with ^M,
your might try undecided-dos as a coding system.  If this doesn't help,
Try to set `comint-output-filter-functions' like this:

\(setq comint-output-filter-functions (append comint-output-filter-functions
                                             '(comint-strip-ctrl-m)))

\(Type \\[describe-mode] in the SQL buffer for a list of commands.)"
  (interactive)
  (if (comint-check-proc "*SQL*")
      (pop-to-buffer "*SQL*")
    (sql-get-login 'database 'server)
    (message "Login...")
    ;; username and password are ignored.  Mark Stosberg suggest to add
    ;; the database at the end.  Jason Beegan suggest using --pset and
    ;; pager=off instead of \\o|cat.  The later was the solution by
    ;; Gregor Zych.  Jason's suggestion is the default value for
    ;; sql-postgres-options.
    (let ((params sql-postgres-options))
      (if (not (string= "" sql-database))
          (setq params (append params (list sql-database))))
      (if (not (string= "" sql-server))
          (setq params (append (list "-h" sql-server) params)))
      (set-buffer (apply 'make-comint "SQL" sql-postgres-program
                         nil params)))
    (setq sql-prompt-regexp "^.*> *")
    (setq sql-prompt-length 5)
    ;; This is a lousy hack to prevent psql from truncating it's output
    ;; and giving stupid warnings. If s.o. knows a way to prevent psql
    ;; from acting this way, then I would be very thankful to
    ;; incorporate this (Gregor Zych <zych@pool.informatik.rwth-aachen.de>)
    ;; (comint-send-string "*SQL*" "\\o \| cat\n")
    (setq sql-mode-font-lock-keywords sql-mode-postgres-font-lock-keywords)
    (setq sql-buffer (current-buffer))
    (sql-interactive-mode)
    (message "Login...done")
    (pop-to-buffer sql-buffer)))

\f

;;;###autoload
(defun sql-interbase ()
  "Run isql by Interbase as an inferior process.

If buffer `*SQL*' exists but no process is running, make a new process.
If buffer exists and a process is running, just switch to buffer
`*SQL*'.

Interpreter used comes from variable `sql-interbase-program'.  Login
uses the variables `sql-user', `sql-password', and `sql-database' as
defaults, if set.

The buffer is put in sql-interactive-mode, giving commands for sending
input.  See `sql-interactive-mode'.

To specify a coding system for converting non-ASCII characters
in the input and output to the process, use \\[universal-coding-system-argument]
before \\[sql-interbase].  You can also specify this with \\[set-buffer-process-coding-system]
in the SQL buffer, after you start the process.
The default comes from `process-coding-system-alist' and
`default-process-coding-system'.

\(Type \\[describe-mode] in the SQL buffer for a list of commands.)"
  (interactive)
  (if (comint-check-proc "*SQL*")
      (pop-to-buffer "*SQL*")
    (sql-get-login 'user 'password 'database)
    (message "Login...")
    ;; Put all parameters to the program (if defined) in a list and call
    ;; make-comint.
    (let ((params sql-interbase-options))
      (if (not (string= "" sql-user))
          (setq params (append (list "-u" sql-user) params)))
      (if (not (string= "" sql-password))
          (setq params (append (list "-p" sql-password) params)))
      (if (not (string= "" sql-database))
        (setq params (cons sql-database params))); add to the front!
      (set-buffer (apply 'make-comint "SQL" sql-interbase-program
                         nil params)))
    (setq sql-prompt-regexp "^SQL> ")
    (setq sql-prompt-length 5)
    (setq sql-buffer (current-buffer))
    (sql-interactive-mode)
    (message "Login...done")
    (pop-to-buffer sql-buffer)))

\f

;;;###autoload
(defun sql-db2 ()
  "Run db2 by IBM as an inferior process.

If buffer `*SQL*' exists but no process is running, make a new process.
If buffer exists and a process is running, just switch to buffer
`*SQL*'.

Interpreter used comes from variable `sql-db2-program'.  There is not
automatic login.

The buffer is put in sql-interactive-mode, giving commands for sending
input.  See `sql-interactive-mode'.

If you use \\[sql-accumulate-and-indent] to send multiline commands to
db2, newlines will be escaped if necessary.  If you don't want that, set
`comint-input-sender' back to `comint-simple-send' by writing an after
advice.  See the elisp manual for more information.

To specify a coding system for converting non-ASCII characters
in the input and output to the process, use \\[universal-coding-system-argument]
before \\[sql-db2].  You can also specify this with \\[set-buffer-process-coding-system]
in the SQL buffer, after you start the process.
The default comes from `process-coding-system-alist' and
`default-process-coding-system'.

\(Type \\[describe-mode] in the SQL buffer for a list of commands.)"
  (interactive)
  (if (comint-check-proc "*SQL*")
      (pop-to-buffer "*SQL*")
    (message "Login...")
    ;; Put all parameters to the program (if defined) in a list and call
    ;; make-comint.
    (set-buffer (apply 'make-comint "SQL" sql-db2-program
                       nil sql-db2-options))
    (setq sql-prompt-regexp "^db2 => ")
    (setq sql-prompt-length 7)
    (setq sql-buffer (current-buffer))
    (sql-interactive-mode)
    ;; Escape newlines.  This must come after sql-interactive-mode
    ;; because all local variables will be killed, there.
    (setq comint-input-sender 'sql-escape-newlines-and-send)
    (message "Login...done")
    (pop-to-buffer sql-buffer)))

;;;###autoload
(defun sql-linter ()
  "Run inl by RELEX as an inferior process.

If buffer `*SQL*' exists but no process is running, make a new process.
If buffer exists and a process is running, just switch to buffer
`*SQL*'.

Interpreter used comes from variable `sql-linter-program' - usually `inl'.
Login uses the variables `sql-user', `sql-password', `sql-database' and
`sql-server' as defaults, if set.  Additional command line parameters
can be stored in the list `sql-linter-options'. Run inl -h to get help on
parameters.

`sql-database' is used to set the LINTER_MBX environment variable for
local connections, `sql-server' refers to the server name from the
`nodetab' file for the network connection (dbc_tcp or friends must run
for this to work).  If `sql-password' is an empty string, inl will use
an empty password.

The buffer is put in sql-interactive-mode, giving commands for sending
input.  See `sql-interactive-mode'.

To use LINTER font locking by default, put this line into your .emacs :
 (setq sql-mode-font-lock-keywords sql-mode-linter-font-lock-keywords)

\(Type \\[describe-mode] in the SQL buffer for a list of commands.)"
  (interactive)
  (if (comint-check-proc "*SQL*")
      (pop-to-buffer "*SQL*")
    (sql-get-login 'user 'password 'database 'server)
    (message "Login...")
    ;; Put all parameters to the program (if defined) in a list and call
    ;; make-comint.
    (let ((params sql-linter-options) (login nil) (old-mbx (getenv "LINTER_MBX")))
      (if (not (string= "" sql-user))
          (setq login (concat sql-user "/" sql-password)))
      (setq params (append (list "-u" login) params))
      (if (not (string= "" sql-server))
          (setq params (append (list "-n" sql-server) params)))
      (if (string= "" sql-database)
          (setenv "LINTER_MBX" nil)
        (setenv "LINTER_MBX" sql-database))
      (set-buffer (apply 'make-comint "SQL" sql-linter-program nil
                         params))
      (setenv "LINTER_MBX" old-mbx)
      )
    (setq sql-prompt-regexp "^SQL>")
    (setq sql-prompt-length 4)
    (setq sql-buffer (current-buffer))
    (sql-interactive-mode)
    (message "Login...done")
    (pop-to-buffer sql-buffer)))

\f

(provide 'sql)

;;; sql.el ends here