SHOW VARIABLES

Description

Shows the system variables of StarRocks. For details about system variables, see System Variables.

Syntax

SHOW [ GLOBAL | SESSION ] VARIABLES
    [ LIKE <pattern> | WHERE <expr> ]

Parameters

Parameter	Description
Modifier: GLOBAL SESSION	With a GLOBAL modifier, the statement displays global system variable values. These are the values used to initialize the corresponding session variables for new connections to StarRocks. If a variable has no global value, no value is displayed. With a SESSION modifier, the statement displays the system variable values that are in effect for the current connection. If a variable has no session value, the global value is displayed. LOCAL is a synonym for SESSION. If no modifier is present, the default is SESSION.
pattern	The pattern used to match the variable by the variable name with the LIKE clause. You can use the % wildcard in this parameter.
expr	The expression used to match the variable by the variable name variable_name or the variable value value with the WHERE clause.

Return value

Return	Description
Variable_name	The name of the variable.
Value	The value of the variable.

Examples

Example 1: Show a variable by exactly matching the variable name with the LIKE clause.

mysql> SHOW VARIABLES LIKE 'wait_timeout';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| wait_timeout  | 28800 |
+---------------+-------+
1 row in set (0.01 sec)

Example 2: Show variables by approximately matching the variable name with the LIKE clause and the wildcard (%).

mysql> SHOW VARIABLES LIKE '%imeou%';
+------------------------------------+-------+
| Variable_name                      | Value |
+------------------------------------+-------+
| interactive_timeout                | 3600  |
| net_read_timeout                   | 60    |
| net_write_timeout                  | 60    |
| new_planner_optimize_timeout       | 3000  |
| query_delivery_timeout             | 300   |
| query_queue_pending_timeout_second | 300   |
| query_timeout                      | 300   |
| tx_visible_wait_timeout            | 10    |
| wait_timeout                       | 28800 |
+------------------------------------+-------+
9 rows in set (0.00 sec)

Example 3: Show a variable by exactly matching the variable name with the WHERE clause.

mysql> show variables where variable_name = 'wait_timeout';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| wait_timeout  | 28800 |
+---------------+-------+
1 row in set (0.17 sec)

Example 4: Show a variable by exactly matching the value of the variable with the WHERE clause.

mysql> show variables where value = '28800';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| wait_timeout  | 28800 |
+---------------+-------+
1 row in set (0.70 sec)