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717fa274d1
match which function parameters. The syntax uses AS, for example funcname(value AS arg1, anothervalue AS arg2) Pavel Stehule
748 lines
25 KiB
PL/PgSQL
748 lines
25 KiB
PL/PgSQL
-- Currently this tests polymorphic aggregates and indirectly does some
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-- testing of polymorphic SQL functions. It ought to be extended.
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-- Tests for other features related to function-calling have snuck in, too.
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-- Legend:
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-----------
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-- A = type is ANY
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-- P = type is polymorphic
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-- N = type is non-polymorphic
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-- B = aggregate base type
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-- S = aggregate state type
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-- R = aggregate return type
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-- 1 = arg1 of a function
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-- 2 = arg2 of a function
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-- ag = aggregate
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-- tf = trans (state) function
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-- ff = final function
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-- rt = return type of a function
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-- -> = implies
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-- => = allowed
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-- !> = not allowed
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-- E = exists
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-- NE = not-exists
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--
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-- Possible states:
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-- ----------------
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-- B = (A || P || N)
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-- when (B = A) -> (tf2 = NE)
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-- S = (P || N)
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-- ff = (E || NE)
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-- tf1 = (P || N)
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-- tf2 = (NE || P || N)
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-- R = (P || N)
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-- create functions for use as tf and ff with the needed combinations of
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-- argument polymorphism, but within the constraints of valid aggregate
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-- functions, i.e. tf arg1 and tf return type must match
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-- polymorphic single arg transfn
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CREATE FUNCTION stfp(anyarray) RETURNS anyarray AS
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'select $1' LANGUAGE SQL;
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-- non-polymorphic single arg transfn
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CREATE FUNCTION stfnp(int[]) RETURNS int[] AS
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'select $1' LANGUAGE SQL;
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-- dual polymorphic transfn
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CREATE FUNCTION tfp(anyarray,anyelement) RETURNS anyarray AS
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'select $1 || $2' LANGUAGE SQL;
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-- dual non-polymorphic transfn
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CREATE FUNCTION tfnp(int[],int) RETURNS int[] AS
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'select $1 || $2' LANGUAGE SQL;
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-- arg1 only polymorphic transfn
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CREATE FUNCTION tf1p(anyarray,int) RETURNS anyarray AS
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'select $1' LANGUAGE SQL;
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-- arg2 only polymorphic transfn
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CREATE FUNCTION tf2p(int[],anyelement) RETURNS int[] AS
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'select $1' LANGUAGE SQL;
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-- multi-arg polymorphic
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CREATE FUNCTION sum3(anyelement,anyelement,anyelement) returns anyelement AS
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'select $1+$2+$3' language sql strict;
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-- finalfn polymorphic
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CREATE FUNCTION ffp(anyarray) RETURNS anyarray AS
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'select $1' LANGUAGE SQL;
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-- finalfn non-polymorphic
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CREATE FUNCTION ffnp(int[]) returns int[] as
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'select $1' LANGUAGE SQL;
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-- Try to cover all the possible states:
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--
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-- Note: in Cases 1 & 2, we are trying to return P. Therefore, if the transfn
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-- is stfnp, tfnp, or tf2p, we must use ffp as finalfn, because stfnp, tfnp,
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-- and tf2p do not return P. Conversely, in Cases 3 & 4, we are trying to
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-- return N. Therefore, if the transfn is stfp, tfp, or tf1p, we must use ffnp
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-- as finalfn, because stfp, tfp, and tf1p do not return N.
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--
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-- Case1 (R = P) && (B = A)
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-- ------------------------
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-- S tf1
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-- -------
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-- N N
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-- should CREATE
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CREATE AGGREGATE myaggp01a(*) (SFUNC = stfnp, STYPE = int4[],
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FINALFUNC = ffp, INITCOND = '{}');
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-- P N
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-- should ERROR: stfnp(anyarray) not matched by stfnp(int[])
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CREATE AGGREGATE myaggp02a(*) (SFUNC = stfnp, STYPE = anyarray,
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FINALFUNC = ffp, INITCOND = '{}');
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-- N P
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-- should CREATE
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CREATE AGGREGATE myaggp03a(*) (SFUNC = stfp, STYPE = int4[],
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FINALFUNC = ffp, INITCOND = '{}');
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CREATE AGGREGATE myaggp03b(*) (SFUNC = stfp, STYPE = int4[],
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INITCOND = '{}');
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-- P P
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-- should ERROR: we have no way to resolve S
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CREATE AGGREGATE myaggp04a(*) (SFUNC = stfp, STYPE = anyarray,
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FINALFUNC = ffp, INITCOND = '{}');
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CREATE AGGREGATE myaggp04b(*) (SFUNC = stfp, STYPE = anyarray,
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INITCOND = '{}');
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-- Case2 (R = P) && ((B = P) || (B = N))
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-- -------------------------------------
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-- S tf1 B tf2
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-- -----------------------
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-- N N N N
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-- should CREATE
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CREATE AGGREGATE myaggp05a(BASETYPE = int, SFUNC = tfnp, STYPE = int[],
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FINALFUNC = ffp, INITCOND = '{}');
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-- N N N P
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-- should CREATE
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CREATE AGGREGATE myaggp06a(BASETYPE = int, SFUNC = tf2p, STYPE = int[],
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FINALFUNC = ffp, INITCOND = '{}');
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-- N N P N
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-- should ERROR: tfnp(int[], anyelement) not matched by tfnp(int[], int)
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CREATE AGGREGATE myaggp07a(BASETYPE = anyelement, SFUNC = tfnp, STYPE = int[],
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FINALFUNC = ffp, INITCOND = '{}');
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-- N N P P
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-- should CREATE
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CREATE AGGREGATE myaggp08a(BASETYPE = anyelement, SFUNC = tf2p, STYPE = int[],
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FINALFUNC = ffp, INITCOND = '{}');
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-- N P N N
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-- should CREATE
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CREATE AGGREGATE myaggp09a(BASETYPE = int, SFUNC = tf1p, STYPE = int[],
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FINALFUNC = ffp, INITCOND = '{}');
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CREATE AGGREGATE myaggp09b(BASETYPE = int, SFUNC = tf1p, STYPE = int[],
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INITCOND = '{}');
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-- N P N P
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-- should CREATE
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CREATE AGGREGATE myaggp10a(BASETYPE = int, SFUNC = tfp, STYPE = int[],
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FINALFUNC = ffp, INITCOND = '{}');
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CREATE AGGREGATE myaggp10b(BASETYPE = int, SFUNC = tfp, STYPE = int[],
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INITCOND = '{}');
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-- N P P N
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-- should ERROR: tf1p(int[],anyelement) not matched by tf1p(anyarray,int)
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CREATE AGGREGATE myaggp11a(BASETYPE = anyelement, SFUNC = tf1p, STYPE = int[],
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FINALFUNC = ffp, INITCOND = '{}');
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CREATE AGGREGATE myaggp11b(BASETYPE = anyelement, SFUNC = tf1p, STYPE = int[],
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INITCOND = '{}');
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-- N P P P
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-- should ERROR: tfp(int[],anyelement) not matched by tfp(anyarray,anyelement)
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CREATE AGGREGATE myaggp12a(BASETYPE = anyelement, SFUNC = tfp, STYPE = int[],
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FINALFUNC = ffp, INITCOND = '{}');
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CREATE AGGREGATE myaggp12b(BASETYPE = anyelement, SFUNC = tfp, STYPE = int[],
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INITCOND = '{}');
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-- P N N N
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-- should ERROR: tfnp(anyarray, int) not matched by tfnp(int[],int)
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CREATE AGGREGATE myaggp13a(BASETYPE = int, SFUNC = tfnp, STYPE = anyarray,
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FINALFUNC = ffp, INITCOND = '{}');
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-- P N N P
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-- should ERROR: tf2p(anyarray, int) not matched by tf2p(int[],anyelement)
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CREATE AGGREGATE myaggp14a(BASETYPE = int, SFUNC = tf2p, STYPE = anyarray,
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FINALFUNC = ffp, INITCOND = '{}');
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-- P N P N
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-- should ERROR: tfnp(anyarray, anyelement) not matched by tfnp(int[],int)
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CREATE AGGREGATE myaggp15a(BASETYPE = anyelement, SFUNC = tfnp,
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STYPE = anyarray, FINALFUNC = ffp, INITCOND = '{}');
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-- P N P P
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-- should ERROR: tf2p(anyarray, anyelement) not matched by tf2p(int[],anyelement)
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CREATE AGGREGATE myaggp16a(BASETYPE = anyelement, SFUNC = tf2p,
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STYPE = anyarray, FINALFUNC = ffp, INITCOND = '{}');
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-- P P N N
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-- should ERROR: we have no way to resolve S
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CREATE AGGREGATE myaggp17a(BASETYPE = int, SFUNC = tf1p, STYPE = anyarray,
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FINALFUNC = ffp, INITCOND = '{}');
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CREATE AGGREGATE myaggp17b(BASETYPE = int, SFUNC = tf1p, STYPE = anyarray,
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INITCOND = '{}');
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-- P P N P
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-- should ERROR: tfp(anyarray, int) not matched by tfp(anyarray, anyelement)
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CREATE AGGREGATE myaggp18a(BASETYPE = int, SFUNC = tfp, STYPE = anyarray,
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FINALFUNC = ffp, INITCOND = '{}');
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CREATE AGGREGATE myaggp18b(BASETYPE = int, SFUNC = tfp, STYPE = anyarray,
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INITCOND = '{}');
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-- P P P N
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-- should ERROR: tf1p(anyarray, anyelement) not matched by tf1p(anyarray, int)
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CREATE AGGREGATE myaggp19a(BASETYPE = anyelement, SFUNC = tf1p,
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STYPE = anyarray, FINALFUNC = ffp, INITCOND = '{}');
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CREATE AGGREGATE myaggp19b(BASETYPE = anyelement, SFUNC = tf1p,
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STYPE = anyarray, INITCOND = '{}');
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-- P P P P
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-- should CREATE
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CREATE AGGREGATE myaggp20a(BASETYPE = anyelement, SFUNC = tfp,
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STYPE = anyarray, FINALFUNC = ffp, INITCOND = '{}');
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CREATE AGGREGATE myaggp20b(BASETYPE = anyelement, SFUNC = tfp,
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STYPE = anyarray, INITCOND = '{}');
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-- Case3 (R = N) && (B = A)
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-- ------------------------
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-- S tf1
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-- -------
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-- N N
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-- should CREATE
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CREATE AGGREGATE myaggn01a(*) (SFUNC = stfnp, STYPE = int4[],
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FINALFUNC = ffnp, INITCOND = '{}');
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CREATE AGGREGATE myaggn01b(*) (SFUNC = stfnp, STYPE = int4[],
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INITCOND = '{}');
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-- P N
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-- should ERROR: stfnp(anyarray) not matched by stfnp(int[])
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CREATE AGGREGATE myaggn02a(*) (SFUNC = stfnp, STYPE = anyarray,
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FINALFUNC = ffnp, INITCOND = '{}');
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CREATE AGGREGATE myaggn02b(*) (SFUNC = stfnp, STYPE = anyarray,
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INITCOND = '{}');
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-- N P
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-- should CREATE
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CREATE AGGREGATE myaggn03a(*) (SFUNC = stfp, STYPE = int4[],
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FINALFUNC = ffnp, INITCOND = '{}');
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-- P P
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-- should ERROR: ffnp(anyarray) not matched by ffnp(int[])
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CREATE AGGREGATE myaggn04a(*) (SFUNC = stfp, STYPE = anyarray,
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FINALFUNC = ffnp, INITCOND = '{}');
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-- Case4 (R = N) && ((B = P) || (B = N))
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-- -------------------------------------
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-- S tf1 B tf2
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-- -----------------------
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-- N N N N
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-- should CREATE
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CREATE AGGREGATE myaggn05a(BASETYPE = int, SFUNC = tfnp, STYPE = int[],
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FINALFUNC = ffnp, INITCOND = '{}');
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CREATE AGGREGATE myaggn05b(BASETYPE = int, SFUNC = tfnp, STYPE = int[],
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INITCOND = '{}');
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-- N N N P
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-- should CREATE
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CREATE AGGREGATE myaggn06a(BASETYPE = int, SFUNC = tf2p, STYPE = int[],
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FINALFUNC = ffnp, INITCOND = '{}');
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CREATE AGGREGATE myaggn06b(BASETYPE = int, SFUNC = tf2p, STYPE = int[],
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INITCOND = '{}');
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-- N N P N
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-- should ERROR: tfnp(int[], anyelement) not matched by tfnp(int[], int)
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CREATE AGGREGATE myaggn07a(BASETYPE = anyelement, SFUNC = tfnp, STYPE = int[],
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FINALFUNC = ffnp, INITCOND = '{}');
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CREATE AGGREGATE myaggn07b(BASETYPE = anyelement, SFUNC = tfnp, STYPE = int[],
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INITCOND = '{}');
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-- N N P P
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-- should CREATE
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CREATE AGGREGATE myaggn08a(BASETYPE = anyelement, SFUNC = tf2p, STYPE = int[],
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FINALFUNC = ffnp, INITCOND = '{}');
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CREATE AGGREGATE myaggn08b(BASETYPE = anyelement, SFUNC = tf2p, STYPE = int[],
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INITCOND = '{}');
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-- N P N N
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-- should CREATE
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CREATE AGGREGATE myaggn09a(BASETYPE = int, SFUNC = tf1p, STYPE = int[],
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FINALFUNC = ffnp, INITCOND = '{}');
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-- N P N P
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-- should CREATE
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CREATE AGGREGATE myaggn10a(BASETYPE = int, SFUNC = tfp, STYPE = int[],
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FINALFUNC = ffnp, INITCOND = '{}');
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-- N P P N
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-- should ERROR: tf1p(int[],anyelement) not matched by tf1p(anyarray,int)
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CREATE AGGREGATE myaggn11a(BASETYPE = anyelement, SFUNC = tf1p, STYPE = int[],
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FINALFUNC = ffnp, INITCOND = '{}');
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-- N P P P
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-- should ERROR: tfp(int[],anyelement) not matched by tfp(anyarray,anyelement)
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CREATE AGGREGATE myaggn12a(BASETYPE = anyelement, SFUNC = tfp, STYPE = int[],
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FINALFUNC = ffnp, INITCOND = '{}');
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-- P N N N
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-- should ERROR: tfnp(anyarray, int) not matched by tfnp(int[],int)
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CREATE AGGREGATE myaggn13a(BASETYPE = int, SFUNC = tfnp, STYPE = anyarray,
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FINALFUNC = ffnp, INITCOND = '{}');
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CREATE AGGREGATE myaggn13b(BASETYPE = int, SFUNC = tfnp, STYPE = anyarray,
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INITCOND = '{}');
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-- P N N P
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-- should ERROR: tf2p(anyarray, int) not matched by tf2p(int[],anyelement)
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CREATE AGGREGATE myaggn14a(BASETYPE = int, SFUNC = tf2p, STYPE = anyarray,
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FINALFUNC = ffnp, INITCOND = '{}');
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CREATE AGGREGATE myaggn14b(BASETYPE = int, SFUNC = tf2p, STYPE = anyarray,
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INITCOND = '{}');
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-- P N P N
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-- should ERROR: tfnp(anyarray, anyelement) not matched by tfnp(int[],int)
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CREATE AGGREGATE myaggn15a(BASETYPE = anyelement, SFUNC = tfnp,
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STYPE = anyarray, FINALFUNC = ffnp, INITCOND = '{}');
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CREATE AGGREGATE myaggn15b(BASETYPE = anyelement, SFUNC = tfnp,
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STYPE = anyarray, INITCOND = '{}');
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-- P N P P
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-- should ERROR: tf2p(anyarray, anyelement) not matched by tf2p(int[],anyelement)
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CREATE AGGREGATE myaggn16a(BASETYPE = anyelement, SFUNC = tf2p,
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STYPE = anyarray, FINALFUNC = ffnp, INITCOND = '{}');
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CREATE AGGREGATE myaggn16b(BASETYPE = anyelement, SFUNC = tf2p,
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STYPE = anyarray, INITCOND = '{}');
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-- P P N N
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-- should ERROR: ffnp(anyarray) not matched by ffnp(int[])
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CREATE AGGREGATE myaggn17a(BASETYPE = int, SFUNC = tf1p, STYPE = anyarray,
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FINALFUNC = ffnp, INITCOND = '{}');
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-- P P N P
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-- should ERROR: tfp(anyarray, int) not matched by tfp(anyarray, anyelement)
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CREATE AGGREGATE myaggn18a(BASETYPE = int, SFUNC = tfp, STYPE = anyarray,
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FINALFUNC = ffnp, INITCOND = '{}');
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-- P P P N
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-- should ERROR: tf1p(anyarray, anyelement) not matched by tf1p(anyarray, int)
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CREATE AGGREGATE myaggn19a(BASETYPE = anyelement, SFUNC = tf1p,
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STYPE = anyarray, FINALFUNC = ffnp, INITCOND = '{}');
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-- P P P P
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-- should ERROR: ffnp(anyarray) not matched by ffnp(int[])
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CREATE AGGREGATE myaggn20a(BASETYPE = anyelement, SFUNC = tfp,
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STYPE = anyarray, FINALFUNC = ffnp, INITCOND = '{}');
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-- multi-arg polymorphic
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CREATE AGGREGATE mysum2(anyelement,anyelement) (SFUNC = sum3,
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STYPE = anyelement, INITCOND = '0');
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-- create test data for polymorphic aggregates
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create temp table t(f1 int, f2 int[], f3 text);
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insert into t values(1,array[1],'a');
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insert into t values(1,array[11],'b');
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insert into t values(1,array[111],'c');
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insert into t values(2,array[2],'a');
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insert into t values(2,array[22],'b');
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insert into t values(2,array[222],'c');
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insert into t values(3,array[3],'a');
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insert into t values(3,array[3],'b');
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-- test the successfully created polymorphic aggregates
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select f3, myaggp01a(*) from t group by f3 order by f3;
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select f3, myaggp03a(*) from t group by f3 order by f3;
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select f3, myaggp03b(*) from t group by f3 order by f3;
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select f3, myaggp05a(f1) from t group by f3 order by f3;
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select f3, myaggp06a(f1) from t group by f3 order by f3;
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select f3, myaggp08a(f1) from t group by f3 order by f3;
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select f3, myaggp09a(f1) from t group by f3 order by f3;
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select f3, myaggp09b(f1) from t group by f3 order by f3;
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select f3, myaggp10a(f1) from t group by f3 order by f3;
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select f3, myaggp10b(f1) from t group by f3 order by f3;
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select f3, myaggp20a(f1) from t group by f3 order by f3;
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select f3, myaggp20b(f1) from t group by f3 order by f3;
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select f3, myaggn01a(*) from t group by f3 order by f3;
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select f3, myaggn01b(*) from t group by f3 order by f3;
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select f3, myaggn03a(*) from t group by f3 order by f3;
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select f3, myaggn05a(f1) from t group by f3 order by f3;
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select f3, myaggn05b(f1) from t group by f3 order by f3;
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select f3, myaggn06a(f1) from t group by f3 order by f3;
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select f3, myaggn06b(f1) from t group by f3 order by f3;
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select f3, myaggn08a(f1) from t group by f3 order by f3;
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select f3, myaggn08b(f1) from t group by f3 order by f3;
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select f3, myaggn09a(f1) from t group by f3 order by f3;
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select f3, myaggn10a(f1) from t group by f3 order by f3;
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select mysum2(f1, f1 + 1) from t;
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-- test inlining of polymorphic SQL functions
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create function bleat(int) returns int as $$
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begin
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raise notice 'bleat %', $1;
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return $1;
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end$$ language plpgsql;
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create function sql_if(bool, anyelement, anyelement) returns anyelement as $$
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select case when $1 then $2 else $3 end $$ language sql;
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-- Note this would fail with integer overflow, never mind wrong bleat() output,
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-- if the CASE expression were not successfully inlined
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select f1, sql_if(f1 > 0, bleat(f1), bleat(f1 + 1)) from int4_tbl;
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|
|
|
select q2, sql_if(q2 > 0, q2, q2 + 1) from int8_tbl;
|
|
|
|
-- another kind of polymorphic aggregate
|
|
|
|
create function add_group(grp anyarray, ad anyelement, size integer)
|
|
returns anyarray
|
|
as $$
|
|
begin
|
|
if grp is null then
|
|
return array[ad];
|
|
end if;
|
|
if array_upper(grp, 1) < size then
|
|
return grp || ad;
|
|
end if;
|
|
return grp;
|
|
end;
|
|
$$
|
|
language plpgsql immutable;
|
|
|
|
create aggregate build_group(anyelement, integer) (
|
|
SFUNC = add_group,
|
|
STYPE = anyarray
|
|
);
|
|
|
|
select build_group(q1,3) from int8_tbl;
|
|
|
|
-- this should fail because stype isn't compatible with arg
|
|
create aggregate build_group(int8, integer) (
|
|
SFUNC = add_group,
|
|
STYPE = int2[]
|
|
);
|
|
|
|
-- but we can make a non-poly agg from a poly sfunc if types are OK
|
|
create aggregate build_group(int8, integer) (
|
|
SFUNC = add_group,
|
|
STYPE = int8[]
|
|
);
|
|
|
|
-- check that we can apply functions taking ANYARRAY to pg_stats
|
|
select distinct array_ndims(histogram_bounds) from pg_stats
|
|
where histogram_bounds is not null;
|
|
|
|
-- such functions must protect themselves if varying element type isn't OK
|
|
select max(histogram_bounds) from pg_stats;
|
|
|
|
-- test variadic polymorphic functions
|
|
|
|
create function myleast(variadic anyarray) returns anyelement as $$
|
|
select min($1[i]) from generate_subscripts($1,1) g(i)
|
|
$$ language sql immutable strict;
|
|
|
|
select myleast(10, 1, 20, 33);
|
|
select myleast(1.1, 0.22, 0.55);
|
|
select myleast('z'::text);
|
|
select myleast(); -- fail
|
|
|
|
-- test with variadic call parameter
|
|
select myleast(variadic array[1,2,3,4,-1]);
|
|
select myleast(variadic array[1.1, -5.5]);
|
|
|
|
--test with empty variadic call parameter
|
|
select myleast(variadic array[]::int[]);
|
|
|
|
-- an example with some ordinary arguments too
|
|
create function concat(text, variadic anyarray) returns text as $$
|
|
select array_to_string($2, $1);
|
|
$$ language sql immutable strict;
|
|
|
|
select concat('%', 1, 2, 3, 4, 5);
|
|
select concat('|', 'a'::text, 'b', 'c');
|
|
select concat('|', variadic array[1,2,33]);
|
|
select concat('|', variadic array[]::int[]);
|
|
|
|
drop function concat(text, anyarray);
|
|
|
|
-- mix variadic with anyelement
|
|
create function formarray(anyelement, variadic anyarray) returns anyarray as $$
|
|
select array_prepend($1, $2);
|
|
$$ language sql immutable strict;
|
|
|
|
select formarray(1,2,3,4,5);
|
|
select formarray(1.1, variadic array[1.2,55.5]);
|
|
select formarray(1.1, array[1.2,55.5]); -- fail without variadic
|
|
select formarray(1, 'x'::text); -- fail, type mismatch
|
|
select formarray(1, variadic array['x'::text]); -- fail, type mismatch
|
|
|
|
drop function formarray(anyelement, variadic anyarray);
|
|
|
|
-- test pg_typeof() function
|
|
select pg_typeof(null); -- unknown
|
|
select pg_typeof(0); -- integer
|
|
select pg_typeof(0.0); -- numeric
|
|
select pg_typeof(1+1 = 2); -- boolean
|
|
select pg_typeof('x'); -- unknown
|
|
select pg_typeof('' || ''); -- text
|
|
select pg_typeof(pg_typeof(0)); -- regtype
|
|
select pg_typeof(array[1.2,55.5]); -- numeric[]
|
|
select pg_typeof(myleast(10, 1, 20, 33)); -- polymorphic input
|
|
|
|
-- test functions with default parameters
|
|
|
|
-- test basic functionality
|
|
create function dfunc(a int = 1, int = 2) returns int as $$
|
|
select $1 + $2;
|
|
$$ language sql;
|
|
|
|
select dfunc();
|
|
select dfunc(10);
|
|
select dfunc(10, 20);
|
|
select dfunc(10, 20, 30); -- fail
|
|
|
|
drop function dfunc(); -- fail
|
|
drop function dfunc(int); -- fail
|
|
drop function dfunc(int, int); -- ok
|
|
|
|
-- fail: defaults must be at end of argument list
|
|
create function dfunc(a int = 1, b int) returns int as $$
|
|
select $1 + $2;
|
|
$$ language sql;
|
|
|
|
-- however, this should work:
|
|
create function dfunc(a int = 1, out sum int, b int = 2) as $$
|
|
select $1 + $2;
|
|
$$ language sql;
|
|
|
|
select dfunc();
|
|
|
|
-- verify it lists properly
|
|
\df dfunc
|
|
|
|
drop function dfunc(int, int);
|
|
|
|
-- check implicit coercion
|
|
create function dfunc(a int DEFAULT 1.0, int DEFAULT '-1') returns int as $$
|
|
select $1 + $2;
|
|
$$ language sql;
|
|
select dfunc();
|
|
|
|
create function dfunc(a text DEFAULT 'Hello', b text DEFAULT 'World') returns text as $$
|
|
select $1 || ', ' || $2;
|
|
$$ language sql;
|
|
|
|
select dfunc(); -- fail: which dfunc should be called? int or text
|
|
select dfunc('Hi'); -- ok
|
|
select dfunc('Hi', 'City'); -- ok
|
|
select dfunc(0); -- ok
|
|
select dfunc(10, 20); -- ok
|
|
|
|
drop function dfunc(int, int);
|
|
drop function dfunc(text, text);
|
|
|
|
create function dfunc(int = 1, int = 2) returns int as $$
|
|
select 2;
|
|
$$ language sql;
|
|
|
|
create function dfunc(int = 1, int = 2, int = 3, int = 4) returns int as $$
|
|
select 4;
|
|
$$ language sql;
|
|
|
|
-- Now, dfunc(nargs = 2) and dfunc(nargs = 4) are ambiguous when called
|
|
-- with 0 to 2 arguments.
|
|
|
|
select dfunc(); -- fail
|
|
select dfunc(1); -- fail
|
|
select dfunc(1, 2); -- fail
|
|
select dfunc(1, 2, 3); -- ok
|
|
select dfunc(1, 2, 3, 4); -- ok
|
|
|
|
drop function dfunc(int, int);
|
|
drop function dfunc(int, int, int, int);
|
|
|
|
-- default values are not allowed for output parameters
|
|
create function dfunc(out int = 20) returns int as $$
|
|
select 1;
|
|
$$ language sql;
|
|
|
|
-- polymorphic parameter test
|
|
create function dfunc(anyelement = 'World'::text) returns text as $$
|
|
select 'Hello, ' || $1::text;
|
|
$$ language sql;
|
|
|
|
select dfunc();
|
|
select dfunc(0);
|
|
select dfunc(to_date('20081215','YYYYMMDD'));
|
|
select dfunc('City'::text);
|
|
|
|
drop function dfunc(anyelement);
|
|
|
|
-- check defaults for variadics
|
|
|
|
create function dfunc(a variadic int[]) returns int as
|
|
$$ select array_upper($1, 1) $$ language sql;
|
|
|
|
select dfunc(); -- fail
|
|
select dfunc(10);
|
|
select dfunc(10,20);
|
|
|
|
create or replace function dfunc(a variadic int[] default array[]::int[]) returns int as
|
|
$$ select array_upper($1, 1) $$ language sql;
|
|
|
|
select dfunc(); -- now ok
|
|
select dfunc(10);
|
|
select dfunc(10,20);
|
|
|
|
-- can't remove the default once it exists
|
|
create or replace function dfunc(a variadic int[]) returns int as
|
|
$$ select array_upper($1, 1) $$ language sql;
|
|
|
|
\df dfunc
|
|
|
|
drop function dfunc(a variadic int[]);
|
|
|
|
-- Ambiguity should be reported only if there's not a better match available
|
|
|
|
create function dfunc(int = 1, int = 2, int = 3) returns int as $$
|
|
select 3;
|
|
$$ language sql;
|
|
|
|
create function dfunc(int = 1, int = 2) returns int as $$
|
|
select 2;
|
|
$$ language sql;
|
|
|
|
create function dfunc(text) returns text as $$
|
|
select $1;
|
|
$$ language sql;
|
|
|
|
-- dfunc(narg=2) and dfunc(narg=3) are ambiguous
|
|
select dfunc(1); -- fail
|
|
|
|
-- but this works since the ambiguous functions aren't preferred anyway
|
|
select dfunc('Hi');
|
|
|
|
drop function dfunc(int, int, int);
|
|
drop function dfunc(int, int);
|
|
drop function dfunc(text);
|
|
|
|
--
|
|
-- Tests for named- and mixed-notation function calling
|
|
--
|
|
|
|
create function dfunc(a int, b int, c int = 0, d int = 0)
|
|
returns table (a int, b int, c int, d int) as $$
|
|
select $1, $2, $3, $4;
|
|
$$ language sql;
|
|
|
|
select (dfunc(10,20,30)).*;
|
|
select (dfunc(10 as a, 20 as b, 30 as c)).*;
|
|
select * from dfunc(10 as a, 20 as b);
|
|
select * from dfunc(10 as b, 20 as a);
|
|
select * from dfunc(0); -- fail
|
|
select * from dfunc(1,2);
|
|
select * from dfunc(1,2,3 as c);
|
|
select * from dfunc(1,2,3 as d);
|
|
|
|
select * from dfunc(10 as x, 20 as b, 30 as x); -- fail, duplicate name
|
|
select * from dfunc(10, 20 as b, 30); -- fail, named args must be last
|
|
select * from dfunc(10 as x, 20 as b, 30 as c); -- fail, unknown param
|
|
select * from dfunc(10, 10, 20 as a); -- fail, a overlaps positional parameter
|
|
select * from dfunc(1,2 as c,3 as d); -- fail, no value for b
|
|
|
|
drop function dfunc(int, int, int, int);
|
|
|
|
-- test with different parameter types
|
|
create function dfunc(a varchar, b numeric, c date = current_date)
|
|
returns table (a varchar, b numeric, c date) as $$
|
|
select $1, $2, $3;
|
|
$$ language sql;
|
|
|
|
select (dfunc('Hello World', 20, '2009-07-25'::date)).*;
|
|
select * from dfunc('Hello World', 20, '2009-07-25'::date);
|
|
select * from dfunc('2009-07-25'::date as c, 'Hello World' as a, 20 as b);
|
|
select * from dfunc('Hello World', 20 as b, '2009-07-25'::date as c);
|
|
select * from dfunc('Hello World', '2009-07-25'::date as c, 20 as b);
|
|
select * from dfunc('Hello World', 20 as c, '2009-07-25'::date as b); -- fail
|
|
|
|
drop function dfunc(varchar, numeric, date);
|
|
|
|
-- test out parameters with named params
|
|
create function dfunc(a varchar = 'def a', out _a varchar, c numeric = NULL, out _c numeric)
|
|
returns record as $$
|
|
select $1, $2;
|
|
$$ language sql;
|
|
|
|
select (dfunc()).*;
|
|
select * from dfunc();
|
|
select * from dfunc('Hello', 100);
|
|
select * from dfunc('Hello' as a, 100 as c);
|
|
select * from dfunc(100 as c, 'Hello' as a);
|
|
select * from dfunc('Hello');
|
|
select * from dfunc('Hello', 100 as c);
|
|
select * from dfunc(100 as c);
|
|
|
|
-- fail, can no longer change an input parameter's name
|
|
create or replace function dfunc(a varchar = 'def a', out _a varchar, x numeric = NULL, out _c numeric)
|
|
returns record as $$
|
|
select $1, $2;
|
|
$$ language sql;
|
|
|
|
create or replace function dfunc(a varchar = 'def a', out _a varchar, numeric = NULL, out _c numeric)
|
|
returns record as $$
|
|
select $1, $2;
|
|
$$ language sql;
|
|
|
|
drop function dfunc(varchar, numeric);
|
|
|
|
--fail, named parameters are not unique
|
|
create function testfoo(a int, a int) returns int as $$ select 1;$$ language sql;
|
|
create function testfoo(int, out a int, out a int) returns int as $$ select 1;$$ language sql;
|
|
create function testfoo(out a int, inout a int) returns int as $$ select 1;$$ language sql;
|
|
create function testfoo(a int, inout a int) returns int as $$ select 1;$$ language sql;
|
|
|
|
-- valid
|
|
create function testfoo(a int, out a int) returns int as $$ select $1;$$ language sql;
|
|
select testfoo(37);
|
|
drop function testfoo(int);
|
|
create function testfoo(a int) returns table(a int) as $$ select $1;$$ language sql;
|
|
select * from testfoo(37);
|
|
drop function testfoo(int);
|
|
|
|
-- test polymorphic params and defaults
|
|
create function dfunc(a anyelement, b anyelement = null, flag bool = true)
|
|
returns anyelement as $$
|
|
select case when $3 then $1 else $2 end;
|
|
$$ language sql;
|
|
|
|
select dfunc(1,2);
|
|
select dfunc('a'::text, 'b'); -- positional notation with default
|
|
|
|
select dfunc(1 as a, 2 as b);
|
|
select dfunc('a'::text as a, 'b' as b);
|
|
select dfunc('a'::text as a, 'b' as b, false as flag); -- named notation
|
|
|
|
select dfunc('b'::text as b, 'a' as a); -- named notation with default
|
|
select dfunc('a'::text as a, true as flag); -- named notation with default
|
|
select dfunc('a'::text as a, false as flag); -- named notation with default
|
|
select dfunc('b'::text as b, 'a' as a, true as flag); -- named notation
|
|
|
|
select dfunc('a'::text, 'b', false); -- full positional notation
|
|
select dfunc('a'::text, 'b', false as flag); -- mixed notation
|
|
select dfunc('a'::text, 'b', true); -- full positional notation
|
|
select dfunc('a'::text, 'b', true as flag); -- mixed notation
|
|
|
|
-- check reverse-listing of named-arg calls
|
|
CREATE VIEW dfview AS
|
|
SELECT q1, q2,
|
|
dfunc(q1,q2, q1>q2 as flag) as c3,
|
|
dfunc(q1, q1<q2 as flag, q2 AS b) as c4
|
|
FROM int8_tbl;
|
|
|
|
select * from dfview;
|
|
|
|
\d dfview
|
|
|
|
drop view dfview;
|
|
drop function dfunc(anyelement, anyelement, bool);
|