How to check, if a value is an integer with plpgsql?
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22-09-2019 - |
Question
i am using this function in a trigger:
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.
how would i do this?
Solution
SELECT current_setting('myvar.user') ~ '^[0-9]+$'
OTHER TIPS
Taken from archives.postgresql.org:
CREATE FUNCTION isnumeric(text) RETURNS boolean AS '
SELECT $1 ~ ''^[0-9]+$''
' LANGUAGE 'sql';
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