SET-VARIABLE
Name
SET VARIABLE
Description
This statement is mainly used to modify Doris system variables. These system variables can be modified at the global and session level, and some can also be modified dynamically. You can also view these system variables with SHOW VARIABLE
.
Syntax:
SET variable_assignment [, variable_assignment] ...
Note:
- variable_assignment: user_var_name = expr | [GLOBAL | SESSION] system_var_name = expr
Note:
- Only ADMIN users can set variables to take effect globally
- The globally effective variable does not affect the variable value of the current session, but only affects the variable in the new session.
Variables that support both the current session and the global effect include:
time_zone
wait_timeout
sql_mode
enable_profile
query_timeout
exec_mem_limit
batch_size
allow_partition_column_nullable
insert_visible_timeout_ms
enable_fold_constant_by_be
Variables that only support global effects include:
default_rowset_type
Example
-
Set the time zone to UTC/GMT +8:00
SET time_zone = "Asia/Shanghai";
-
Set the global execution memory size
SET GLOBAL exec_mem_limit = 137438953472
Keywords
SET, VARIABLE