如果一个值是plpgsql的整数,如何检查?

时间:2021-01-31 22:58:38

i am using this function in a trigger:

我在触发器中使用此功能:

CREATE OR REPLACE FUNCTION xx() RETURNS trigger AS $xx$
    BEGIN   
        INSERT INTO my_log (x, y, z) VALUES (NEW.x, NEW.y, current_setting('myvar.user'));
        RETURN NULL;
    END;
$xx$ LANGUAGE plpgsql;

now i would like to check, if 'myvar.user' is a valid integer, and if not, do another INSERT statement.

现在我想检查一下,如果'myvar.user'是一个有效的整数,如果没有,则执行另一个INSERT语句。

how would i do this?

我该怎么做?

2 个解决方案

#1


9  

SELECT  current_setting('myvar.user') ~ '^[0-9]+$'

#2


2  

Taken from archives.postgresql.org:

取自archives.postgresql.org:

CREATE FUNCTION isnumeric(text) RETURNS boolean AS '
SELECT $1 ~ ''^[0-9]+$''
' LANGUAGE 'sql';

#1


9  

SELECT  current_setting('myvar.user') ~ '^[0-9]+$'

#2


2  

Taken from archives.postgresql.org:

取自archives.postgresql.org:

CREATE FUNCTION isnumeric(text) RETURNS boolean AS '
SELECT $1 ~ ''^[0-9]+$''
' LANGUAGE 'sql';

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