Help Center/ GaussDB/ Centralized_2.x/ Working with Databases/ gsql/ Command Reference
Updated on 2023-10-23 GMT+08:00
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Command Reference

Table 1, Table 2, Table 3 and Table 4 list the gsql parameters.

Table 1 Common Parameters

Parameter

Description

Value Range

-c, --command=COMMAND

Specifies that gsql is to run a string command and then exit.

-

-d, --dbname=DBNAME

Specifies the name of the database to connect to.

In addition, gsql allows you to use extended database names, that is, connection strings in the format of 'postgres[ql]://[user[:password]@][netloc][:port][, ...][/dbname][?param1=value1&...]' or '[key=value] [...]' as database names. gsql parses connection information from the connection strings and preferentially uses the information.

Character string

-f, --file=FILENAME

Specifies that files are used as the command source instead of interactively-entered commands. After the files are processed, gsql exits. If FILENAME is a hyphen (-), then standard input is read.

An absolute path or relative path that meets the OS path naming convention

-l, --list

Lists all available databases and then exits.

-

-v, --set, --variable=NAME=VALUE

Sets the gsql variable NAME to VALUE.

For details about variable examples and descriptions, see devg_03_0027.html#EN-US_TOPIC_0000001496515061__en-us_topic_0294748922_en-us_topic_0059778819_en-us_topic_0058968129_li39134862.

-

-X, --no-gsqlrc

Does not read the startup file (including system-wide gsqlrc file and the user's ~/.gsqlrc file).

NOTE:

The startup file is ~/.gsqlrc by default or it can be specified by the environment variable PSQLRC.

-

-1 ("one"), --single-transaction

When gsql uses the -f parameter to execute a script, START TRANSACTION and COMMIT are added to the start and end of the script, respectively, so that the script is executed as one transaction. This ensures that the script is executed successfully. If the script cannot be executed, the script is invalid.

NOTE:

If the script has used START TRANSACTION, COMMIT, or ROLLBACK, this parameter is invalid.

-

-?, --help

Displays help information about gsql command line parameters, and exits.

-

-V, --version

Prints the gsql version and exits.

-
Table 2 Input and output parameters

Parameter

Description

Value Range

-a, --echo-all

Prints all input lines to standard output as they are read.

CAUTION:

When this parameter is used in some SQL statements, sensitive information, such as user passwords, may be disclosed. Use this parameter with caution.

-

-e, --echo-queries

Copies all SQL statements sent to the server to standard output as well.

CAUTION:

When this parameter is used in some SQL statements, sensitive information, such as user passwords, may be disclosed. Use this parameter with caution.

-

-E, --echo-hidden

Echoes the actual queries generated by \d and other backslash commands.

-

-k, --with-key=KEY

Uses gsql to decrypt imported encrypted files.

NOTICE:
  • For key characters, such as the single quotation mark (') or double quotation mark (") in shell commands, Linux shell checks whether the input single quotation mark (') or double quotation mark (") matches. If no match is found, Linux shell does not enter the gsql program until input is complete.
  • Stored procedures and functions cannot be decrypted and imported.

-

-L, --log-file=FILENAME

Writes normal output destination and all query output into the FILENAME file.

CAUTION:
  • When this parameter is used in some SQL statements, sensitive information, such as user passwords, may be disclosed. Use this parameter with caution.
  • This parameter retains only the query result in the corresponding file, so that the result can be easily found and parsed by other invokers (for example, automatic O&M scripts). Logs about gsql operation are not retained.

An absolute path or relative path that meets the OS path naming convention

-m, --maintenance

Allows connections to the database during two-phase transaction recovery.

NOTE:

The parameter is for engineers only. When this parameter is used, gsql can be connected to the standby server to check data consistency between the primary server and standby server.

-

-n, --no-libedit

Closes the command line editing.

-

-o, --output=FILENAME

Puts all query output into the FILENAME file.

An absolute path or relative path that meets the OS path naming convention

-q, --quiet

Specifies the quiet mode and no additional information will be printed.

By default, gsql displays various information.

-s, --single-step

Runs in single-step mode. This indicates that the user is prompted before each command is sent to the server. This parameter can also be used for canceling execution. This parameter can be used to debug scripts.

CAUTION:

When this parameter is used in some SQL statements, sensitive information, such as user passwords, may be disclosed. Use this parameter with caution.

-

-S, --single-line

Runs in single-row mode where a new line terminates an SQL statement in the same manner as a semicolon does.

-

-C, --enable-client-encryption

When -C is used to connect to a local or remote database, you can use this parameter to enable the encrypted database function.

-
Table 3 Output format parameters

Parameter

Description

Value Range

-A, --no-align

Switches to unaligned output mode.

The default output mode is aligned.

-F, --field-separator=STRING

Specifies the field separator. The default is the vertical bar (|).

-

-H, --html

Turns on the HTML tabular output.

-

-P, --pset=VAR[=ARG]

Specifies the print option in the \pset format in the command line.

NOTE:

The equal sign (=), instead of the space, is used to separate the name and value. For example, enter -P format=latex to set the output format to LaTeX.

-

-R, --record-separator=STRING

Specifies the record separators.

-

-r

Enables the editing mode on the client.

This function is disabled by default.

-t, --tuples-only

Prints only tuples.

-

-T, --table-attr=TEXT

Specifies options to be placed within the HTML table tag.

Works with the -H,--html parameter to specify the output to the HTML format.

-

-x, --expanded

Turns on the expanded table formatting mode.

-

-z, --field-separator-zero

Sets the field separator in the unaligned output mode to be blank.

Use this parameter with the -A, --no-align parameter to switch to unaligned output mode.

-

-0, --record-separator-zero

Sets the record separator in the unaligned output mode to be blank.

Use this parameter with the -A, --no-align parameter to switch to unaligned output mode.

-

-2, --pipeline

Uses a pipe to transmit the password. This parameter cannot be used on devices and must be used together with the -c or -f parameter.

-

-g,

Prints all SQL statements from a file.

-
Table 4 Connection parameters

Parameter

Description

Value Range

-h, --host=HOSTNAME

Specifies the host name of the machine on which the server is running or the directory for the Unix-domain socket.

If the host name is omitted, gsql connects to the server of the local host over the Unix domain socket or over TCP/IP to connect to local host without the Unix domain socket.

-p, --port=PORT

Specifies the port number of the database server.

You can modify the default port number using the -p, --port=PORT parameter.

The default value is 8000.

-U, --username=USERNAME

Specifies the user that connects to the database.

NOTE:
  • If a user is specified to access a database using this parameter, a user password must be provided together for identity verification. You can enter the password interactively or use the -W parameter to specify a password.
  • To connect to a database, add an escape character before any dollar sign ($) in the username.

String. The default username is the same as the current OS username.

-W, --password=PASSWORD

Specifies a password when the -U parameter is used to connect to the local database or a remote database.

NOTE:
  • When the server where the primary database node is located connects to the local primary database node, the trust connection is used by default and this parameter is ignored.
  • To connect to a database, add an escape character before any backslash (\) or back quote (`) in the password.
  • If this parameter is not specified but database connection requires your password, you will be prompted to enter your password in interactive mode. The maximum length of the password is 999 bytes, which is restricted by the maximum value of password_max_length.

String
Parent topic: gsql