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gda-sql-4.0

Langue: en

Version: 366614 (MeeGo - 06/11/10)

Section: 1 (Commandes utilisateur)

NAME

gda-sql - an SQL console based on Libgda

SYNOPSIS

gda-sql [--help] [-v] [--version] [-p] [--no-password-ask] [-o] [--output-file <filename>] [-C] [--command] [-f] [--commands-file <filename>] [-i] [--interactive] [-l] [--list-dsn] [-L] [--list-providers] [-s] [--http-port <port>] [-t] [--http-token <token phrase>] ...

DESCRIPTION

gda-sql is an SQL console based on the Libgda library.

It enables you to type in queries interactively, issue them to be executed by a connection, and see the query results.

Several connections can be opened at the same time, allowing you to switch the active connection to any opened connection. When starting, gda-sql opens a connection for each connection specified on the command line (plus optionally one corresponding to the GDA_SQL_CNC environment variable). The prompt indicates the current connection used when executing commands.

Alternatively, input can be from a file. In addition, it provides a number of meta-commands and various shell-like features to facilitate writing scripts and automating a wide variety of tasks.

OPTIONS

gda-sql accepts the following options:
--help
Show command-line options.
-p, --no-password-ask
Don't ask for a password when it is empty.
-o, --output-file <filename>
Specifies a file to which outputs are redirected.
-C, --command
Run only single command (SQL or internal) and exit.
-f, --commands-file <filename>
Execute commands from <filename>, then exit (except if -i specified).
-i, --interactive
Keep the console opened after executing a file (used with the -f option).
-l, --list-dsn
List configured data sources and exit.
-L, --list-providers
List installed database providers and exit
-s, --http-port <port>
Starts the embedded HTTP server on port <port>
-t, --http-token <token phrase>
Requires HTTP clients to authenticate by providing the <token phrase> (empty phrase by default)

ENVIRONMENT

gda-sql respects a number of environment variables.
GDA_SQL_CNC
to define a connection to systematically be opened when the program starts.
PAGER
to define a text pager program to use (by default determined by the system).
GDA_NO_PAGER
to specify that no text pager should be used.
GDA_SQL_EDITOR EDITOR VISUAL
to define a text editor to be used (variables are examined in this order).
GDA_SQL_VIEWER_PNG
to define a PNG viewer.
GDA_SQL_VIEWER_PDF
to define a PDF viewer.
GDA_SQL_HISTFILE
to define the history file name to use (by default .gdasql_history), set to NO_HISTORY to disable history logging.
gda-sql can be compiled with support for binary relocatibility.
This will cause data, plug-ins and configuration files to be searched relative to the location of the gda-sql executable file.

FILES

gda-sql stores data source definitions (DSN) in Libgda defined files ($HOME/.libgda/config and /etc/libgda-4.0/config where ${prefix} is typically /usr).

For each connection defined by a DSN, the meta data is stored in a $HOME/.libgda/gda-sql-<DSN>.db file.

SQL commands

You can run any SQL understood by the database engine of the current connection. Additionally SQL statement can contain variables expressed as ##<name>::<type> where <name> is the variable's name and <type> is its declared type (which can be "int", "string", "boolean", "time", "date", "timestamp" (and other types defined by GLib's syntax).

Use the .set internal command to set variable's values.

Internal commands

In addition to SQL commands, gda-sql supports internal commands which differ from SQL commands because they start with the "." or "\" character. These commands are:
.?
Lists all internal commands
.bind
Bind two or more connections into a single new one (allowing SQL commands to be executed across multiple connections). .bind <CNC_NAME> <CNC_NAME1> <CNC_NAME2> [<CNC_NAME> ...] creates a new connection named <CNC_NAME> which binds the tables of the <CNC_NAME1>, <CNC_NAME2> and any other connection specified.
.c
Opens a connection or sets the current connection.

.c <CNC_NAME> <DSN_NAME> [USER [PASSWORD]] opens a connection internally known as <CNC_NAME>, using the specified DSN.

.c <CNC_NAME> <CNC_DEFINITION> [USER [PASSWORD]] opens a connection internally known as <CNC_NAME>, using a connection specified by <CNC_DEFINITION> which is similar to the <DSN_DEFINITION> parameter of the .lc command.

.c <CNC_NAME> sets the current connection to the connection known as <CNC_NAME>.

.c ~ or .c ~<CNC_NAME> set the current connection to the meta data corresponding to the current connection (for the first notation) or to the meta data corresponding to the <CNC_NAME> connection.

.close
Closes a connection. Full syntax is: .close <CNC_NAME>.
.cd
Changes the current working directory. Full syntax is: .cd <DIR_NAME>.
.copyright
Displays copyright information.
.d
Lists all database objects if no argument is provided. .d <OBJ_NAME> gives details about the specified object and .d <SCHEMA>.* lists all objects in specified schema.
.dn
Lists all schemas if no argument is provided. .d <SCHEMA_NAME> lists specified schema.
.dt
Lists all tables if no argument is provided. .d <TABLE_NAME> lists specified table.
.dv
Lists all views if no argument is provided. .d <VIEW_NAME> lists specified view.
.e
Edits the query buffer with external editor, if no argument is provided. .e <FILE_NAME> edits the specified file name. The external editor can be specified using environment variables.
.echo
Sends output to stdout, full command is: .echo [<TEXT>].
.export
Exports internal parameter or table's value to the FILE file. Internal parameters are named values used when SQL statement containing variables are executed.

.export <NAME> <FILE_NAME> exports the contents of the <NAME> parameter to the specified file.

.export <TABLE> <COLUMN> <ROW_CONDITION> <FILE_NAME> exports the value of the <TABLE> table, column <COLUMN> for the row selected by <ROW_CONDITION> to the specified file. This is most useful to export BLOBs.

.g
Executes the contents of the query buffer, if no parameter is provided. .g <QUERY_BUFFER_NAME> Executes the contents of the specified query buffer. A named query buffer is created using the .qs command.
.graph
Creates a graph of tables showing their relations (based on foreign key constraints). If no argument is provided, the graph lists all tables. .graph <TABLE_NAME> [<TABLE_NAME>...] creates a graph listing the specified tables.

The generated graph is created as the "gdaph.dot" file. If the GDA_SQL_VIEWER_PNG or GDA_SQL_VIEWER_PDF environment variables are set and if the "dot" program (from GraphViz) is found, then the graph is displayed (if a display is available).

.H
Set output format. Full syntax is: .H [HTML|XML|CSV|DEFAULT].
.http
Starts/stops the embedded HTTP server. Full syntax is .http [<port> [<authentication_token>]], where <authentication_token> is an optional token phrase which HTTP clients are required to send to authenticate.
.i
Executes commands from file the specified file: .i <FILE_NAME>.
.l
Lists all data sources if no argument is provided. .l <DSN> lists information about the specified DSN.
.lp
Lists all available database providers if no argument is provided. .lp <provider> lists information about the specified provider.
.lc
Declares a DSN. Full syntax is: .lc <DSN_NAME> <DSN_DEFINITION> [<DESCRIPTION>]. The <DSN_DEFINITION> format is: <provider>://[<username>[:<password>]@]<connection_params> where <connection_params> is a semi-colon (";") separated list of <key>=<value> pairs where <key> is defined when using .lp <provider> (if <value> contains non alphanumeric characters, they should be represented as specified by the RFC 1738).

If a DSN with a similar name already exists, it is first removed.

For example: ".lc mydsn PostgreSQL://HOST=moon;DB_NAME=mydb".

.lr
Removes a DSN declaration. Full syntax is: .lc <DSN_NAME>.
.meta
Updates the current connection's meta data (use this command after having modified the database's schema).
.o
Sends output to a file or |pipe. Full syntax is: .o <FILE_NAME> or .o |<COMMAND>.
.q
Quits the application.
.qecho
Sends output to the output stream (stdout). Full syntax is: .qecho <TEXT>.
.qa
Lists all saved query buffers in dictionary.
.qd
Deletes a query buffer from the dictionary. Full syntax is: .qd <QUERY_BUFFER_NAME>
.ql
Loads query buffer from dictionary into the current query buffer. Full syntax is: .ql <QUERY_BUFFER_NAME>.
.qp
Shows the contents of the current query buffer.
.qr
Resets the query buffer to empty if no argument is provided. .qr <FILE _NAME> loads the specified file into the query buffer.
.qs
Saves query buffer to dictionary, full syntax is .qs <QUERY_BUFFER_NAME>. This creates a new query buffer with the specified name in the dictionary, containing the current query buffer.
.qw
Writes the query buffer to the specified file, full syntax is .qw <FILE_NAME>.
.s
Show commands history. .s <FILE_NAME> saves command history to specified file.
.set
Sets, shows or lists internal parameters.

.set lists all the defined internal parameters.

.set <NAME> <VALUE> (re)defines the internal parameter named <NAME> to the specified value (which can be the _null_ literal to set it to NULL).

.set <NAME> shows the contents of the internal parameter named <NAME>.

.setex
Set internal parameter as the contents of the FILE file or from an existing table's value.

.setex <NAME> <FILE_NAME> (re)defines the the internal parameter named <NAME> with the contents of the specified file name.

.setex <NAME> <TABLE> <COLUMN> <ROW_CONDITION> (re)defines the the internal parameter named <NAME> with the value of the <TABLE> table, column <COLUMN> for the row selected by <ROW_CONDITION>.This is most useful to export BLOBs.

.unset
Unset (delete) internal parameter.

.unset unsets all the internal parameters.

.unset <NAME> unsets the internal parameter named <NAME>.

SUGGESTIONS AND BUG REPORTS

Any bugs found should be reported to the online bug-tracking system available on the web at http://bugzilla.gnome.org/. Before reporting bugs, please check to see if the bug has already been reported.

When reporting bugs, it is important to include a reliable way to reproduce the bug, version number of gda-sql, OS name and version, and any relevant hardware specs. If a bug is causing a crash, it is very useful if a stack trace can be provided. And of course, patches to rectify the bug are even better.

OTHER INFO

Consult the Libgda's home page at http://www.gnome-db.org/.

AUTHORS

Vivien Malerba (for Libgda's authors, please consult the AUTORS file within the Libgda's sources)

SEE ALSO

psql(1), mysql(1), sqlite3(1)
Il n'y a point d'accidents si malheureux dont les habiles gens
ne tirent quelque avantage, ni de si heureux que les imprudents
ne puissent tourner à leur préjudice.
-+- François de La Rochefoucauld (1613-1680), Maximes 59 -+-