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Added cast from half to numeric [skip ci]

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This commit is contained in:
Andrew Kane
2023-12-04 12:38:34 -08:00
parent 4b630d4f27
commit 95eff595f0
5 changed files with 53 additions and 5 deletions
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6
sql/vector--0.5.1--0.6.0.sql
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@@ -55,6 +55,9 @@ CREATE FUNCTION integer_to_half(integer, integer, boolean) RETURNS half
CREATE FUNCTION numeric_to_half(numeric, integer, boolean) RETURNS half
AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
CREATE FUNCTION half_to_numeric(half, integer, boolean) RETURNS numeric
AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
CREATE CAST (real AS half)
WITH FUNCTION float4_to_half(real, integer, boolean) AS IMPLICIT;
@@ -67,6 +70,9 @@ CREATE CAST (integer AS half)
CREATE CAST (numeric AS half)
WITH FUNCTION numeric_to_half(numeric, integer, boolean) AS IMPLICIT;
CREATE CAST (half AS numeric)
WITH FUNCTION half_to_numeric(half, integer, boolean) AS IMPLICIT;
CREATE OPERATOR <-> (
LEFTARG = half[], RIGHTARG = half[], PROCEDURE = l2_distance,
COMMUTATOR = '<->'

6
sql/vector.sql
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@@ -353,6 +353,9 @@ CREATE FUNCTION integer_to_half(integer, integer, boolean) RETURNS half
CREATE FUNCTION numeric_to_half(numeric, integer, boolean) RETURNS half
AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
CREATE FUNCTION half_to_numeric(half, integer, boolean) RETURNS numeric
AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
-- half casts
CREATE CAST (real AS half)
@@ -367,6 +370,9 @@ CREATE CAST (integer AS half)
CREATE CAST (numeric AS half)
WITH FUNCTION numeric_to_half(numeric, integer, boolean) AS IMPLICIT;
CREATE CAST (half AS numeric)
WITH FUNCTION half_to_numeric(half, integer, boolean) AS IMPLICIT;
-- half operators
CREATE OPERATOR <-> (

14
src/half.c
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@@ -426,6 +426,20 @@ numeric_to_half(PG_FUNCTION_ARGS)
PG_RETURN_HALF(h);
}
/*
* Convert half to numeric
*/
PGDLLEXPORT PG_FUNCTION_INFO_V1(half_to_numeric);
Datum
half_to_numeric(PG_FUNCTION_ARGS)
{
half h = PG_GETARG_HALF(0);
float f = HalfToFloat4(h);
Numeric num = DatumGetNumeric(DirectFunctionCall1(float4_numeric, Float4GetDatum(f)));
PG_RETURN_NUMERIC(num);
}
/*
* Convert float4 to half
*/

26
test/expected/half.out
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@@ -58,6 +58,12 @@ SELECT '{1,2,3}'::half[];
{1,2,3}
(1 row)
SELECT '{1,2,3}'::half[]::real[];
float4
---------
{1,2,3}
(1 row)
SELECT '65505'::integer::half;
half
-------
@@ -82,10 +88,22 @@ SELECT '1.5'::half::real;
1.5
(1 row)
SELECT '{1.5}'::half[]::real[];
float4
--------
{1.5}
SELECT '1.5'::real::half;
half
------
1.5
(1 row)
SELECT '1.5'::half::numeric;
numeric
---------
1.5
(1 row)
SELECT '1.5'::numeric::half;
half
------
1.5
(1 row)
SELECT l2_distance('{0,0}'::half[], '{3,4}'::half[]);

6
test/sql/half.sql
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@@ -12,13 +12,17 @@ SELECT '1.5 '::half;
SELECT '1.5a'::half;
SELECT '{1,2,3}'::half[];
SELECT '{1,2,3}'::half[]::real[];
SELECT '65505'::integer::half;
SELECT 'NaN'::real::half;
SELECT 'Infinity'::real::half;
SELECT '1.5'::half::real;
SELECT '{1.5}'::half[]::real[];
SELECT '1.5'::real::half;
SELECT '1.5'::half::numeric;
SELECT '1.5'::numeric::half;
SELECT l2_distance('{0,0}'::half[], '{3,4}'::half[]);
SELECT l2_distance('{0,0}'::half[], '{0,1}'::half[]);