Gbase 8C configuration setting function

The configuration setting function is a function that can be used to query and modify run-time configuration parameters .

current_setting(setting_name)

describe ： Current setting value .

return type ：text

remarks ：current_setting Used to obtain setting_name The current value of the . and SQL sentence SHOW It's equivalent . such as ：

 gbase=# SELECT current_setting('datestyle');

current_setting

-----------------

 ISO, MDY

(1 row)

set_working_grand_version_num_manually(tmp_version)

describe ： Update and upgrade the new features of the database by switching the authorized version number .

return type ：void

shell_in(type)

describe ： by shell Type input route （ Those types that have not been filled ）.

return type ：void

shell_out(type)

describe ： by shell Type output route （ Those types that have not been filled ）.

return type ：void

set_config(setting_name, new_value, is_local)

describe ： Set parameters and return new values .

return type ：text

remarks ：set_config The parameter setting_name Set to new_value. If is_local by true, be new_value Will only be applied to the current transaction . If you want to new_value Apply to current session , have access to false, and SQL sentence SET It's equivalent . for example ：

 gbase=# SELECT set_config('log_statement_stats', 'off', false);

set_config

------------

 off

(1 row)