Postgresql function check if variable is null Sep 24, 2019 · I assume you want to catch any exception and return null instead, so something like: create or replace function my_to_timestamp(arg text) returns timestamp language plpgsql as $$ begin begin return to_timestamp(arg, 'dd/mm/yyyy HH:MI:SS'); exception when others then return null; end; end $$; Example: 2 days ago · Notice that we have specified the functions as “ strict ”, meaning that the system should automatically assume a null result if any input value is null. To check if a value is NULL, you cannot compare it with NULL using the equal to operator. nilai is not null) But I also want to change the null record which appears with 0, I've tried COALESCE but it still doesn't give me the right result. Jan 29, 2020 · In PostgreSQL, the || operator concatenates STRINGs but with a NULL argument the result is NULL. nilai is not null or b. Depending on the task, there are various alternatives: PostgreSQL table variable; SELECT multiple rows and columns into a record variable select COALESCE(null, null, 1, 'two') --returns 1 select COALESCE(null, null, null, 'two') --returns 'two' One little note, if COALESCE hasn't argument that is not the NULL, it will throw an exception, so if you have just two arguments and both can be null - do use ISNULL. The following example uses the COALESCE() function to return the first non-null argument: SELECT COALESCE (1, 2 Beware that using variables in a LIKE pattern may have unintended consequences when those variables contain underscores (_) or percent characters (%). Jul 10, 2014 · Calling Function: With null value. If multiple rows are returned, only the first will be assigned to the INTO variable. *) IS NOT NULL) FROM TABLE; -- detect at least one null in rows In some cases, it may be preferable to write row IS DISTINCT FROM NULL or row IS NOT DISTINCT FROM NULL, which will simply check whether the overall row value is null without any additional tests on the row Feb 7, 2010 · It functions much like ISNULL, although provides more functionality. mvrgbj pkehxsr dvqd tmpy eyhv jdeh gzqhhgp isqffgp vkd qqoi tpxx zzddbg gqnj bqelf cbhyl