doris/SET-VARIABLE.md at bdf66731fa075809bca61e229fb45be676cbb803

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Mingyu Chen 74a482ca7f [fix] fix docs build bug (#9293 )

After this PR #9272, the `docs/build_help_zip.sh` will run failed.
This PR fix this issue.
But the help module still has some parse problem, I will fix it in next PR.

This CL mainly changes:
1. fix `docs/build_help_zip.sh` error
2. remove `sql-reference-v2` to `sql-reference`
3. modify build extension github action to run `docs/build_help_zip.sh`

2022-04-28 22:19:04 +08:00

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title, language

title	language
SET-VARIABLE	en

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.

grammar:

SET variable_assignment [, variable_assignment] ...

illustrate:

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 Dongba District
```
SET time_zone = "Asia/Shanghai";
```

Set the global execution memory size

SET GLOBAL exec_mem_limit = 137438953472

Keywords

SET, VARIABLE

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