Help Center/ GaussDB/ Developer Guide(Distributed_8.x)/ SQL Reference/ Constant and Macro
Updated on 2024-08-20 GMT+08:00
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Constant and Macro

Table 1 lists the constants and macros that can be used in GaussDB.

Table 1 Constant and macro

Parameter

Description

Example

CURRENT_CATALOG

Specifies the current database.

 
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testdb=# SELECT CURRENT_CATALOG;
current_database
------------------
testdb
(1 row)

CURRENT_ROLE

Specifies the current user.

 
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gaussdb=# SELECT CURRENT_ROLE;
current_user
--------------
omm
(1 row)

CURRENT_SCHEMA

Specifies the current database mode.

 
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gaussdb=# SELECT CURRENT_SCHEMA;
current_schema
----------------
public
(1 row)

CURRENT_USER

Specifies the current user.

 
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gaussdb=# SELECT CURRENT_USER;
current_user
--------------
omm
(1 row)

LOCALTIMESTAMP

Specifies the current session time (without time zone).

 
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gaussdb=# SELECT LOCALTIMESTAMP;
         timestamp
----------------------------
2015-10-10 15:37:30.968538
(1 row)

NULL

This parameter is left blank.

N/A

SESSION_USER

Specifies the current system user.

 
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gaussdb=# SELECT SESSION_USER;
session_user
--------------
omm
(1 row)

SYSDATE

Specifies the current system date.

 
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gaussdb=# SELECT SYSDATE;
sysdate
---------------------
2015-10-10 15:48:53
(1 row)

USER

Specifies the current user, also called CURRENT_USER.

 
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gaussdb=# SELECT USER;
current_user
--------------
omm
(1 row)
Parent topic: SQL Reference