Hi,
I found something strange (at least for my limited view).
in pl_exec.c:1549 in the function exec_stmt_case() we have this:
""" /* SQL2003 mandates this error if there was no ELSE clause */ if (!stmt->have_else) ereport(ERROR,
(errcode(ERRCODE_CASE_NOT_FOUND), errmsg("case not found"), errhint("CASE statement
ismissing ELSE part.")));
"""
resulting in this function to fail when i try to execute it
"""
postgres=# create or replace function test_case() returns boolean as $$
declare v_one integer = 1; v_two boolean = false;
begin case when v_one is null then v_two = true; end case; return v_two;
end
$$ language plpgsql;
CREATE FUNCTION
postgres=# select test_case();
ERROR: case not found
HINT: CASE statement is missing ELSE part.
CONTEXT: PL/pgSQL function "test_case" line 5 at CASE
"""
this is based on General Rules case 1 of chapter 13.6 (case statement)
but i don't think that behaviour is the meaning of that Rule. Even if
it is, the exception should be: "case not found for case statement"
and not just "case not found"
"""
General Rules
1) Case: a) If the <search condition> of some <searched case statement when
clause> in a <case statement> is True, then let SL be the <SQL statement list> of the first
(leftmost) <searched case statement when clause> whose <search condition> is True. b) If the <case statement>
simplycontains a <case statement else
clause>, then let SL be the <SQL statement list> of that <case statement else clause>. c) Otherwise, an exception
conditionis raised: case not found for
case statement, and the execution of the <case statement> is terminated immediately.
"""
comments?
--
Atentamente,
Jaime Casanova
Soporte y capacitación de PostgreSQL
Asesoría y desarrollo de sistemas
Guayaquil - Ecuador
Cel. +59387171157
