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Document get_call_result_type() and friends; mark TypeGetTupleDesc()

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and RelationNameGetTupleDesc() as deprecated; remove uses of the
latter in the contrib library.  Along the way, clean up crosstab()
code and documentation a little.
This commit is contained in:
Tom Lane
2005-05-30 23:09:07 +00:00
parent b215fae891
commit 978129f28e
12 changed files with 373 additions and 231 deletions
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45
contrib/tablefunc/sql/tablefunc.sql
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@ -34,9 +34,19 @@ SELECT * FROM crosstab2('SELECT rowid, attribute, val FROM ct where rowclass = '
SELECT * FROM crosstab3('SELECT rowid, attribute, val FROM ct where rowclass = ''group2'' ORDER BY 1,2;');
SELECT * FROM crosstab4('SELECT rowid, attribute, val FROM ct where rowclass = ''group2'' ORDER BY 1,2;');
SELECT * FROM crosstab('SELECT rowid, attribute, val FROM ct where rowclass = ''group1'' ORDER BY 1,2;', 2) AS c(rowid text, att1 text, att2 text);
SELECT * FROM crosstab('SELECT rowid, attribute, val FROM ct where rowclass = ''group1'' ORDER BY 1,2;', 3) AS c(rowid text, att1 text, att2 text, att3 text);
SELECT * FROM crosstab('SELECT rowid, attribute, val FROM ct where rowclass = ''group1'' ORDER BY 1,2;', 4) AS c(rowid text, att1 text, att2 text, att3 text, att4 text);
SELECT * FROM crosstab('SELECT rowid, attribute, val FROM ct where rowclass = ''group1'' ORDER BY 1,2;') AS c(rowid text, att1 text, att2 text);
SELECT * FROM crosstab('SELECT rowid, attribute, val FROM ct where rowclass = ''group1'' ORDER BY 1,2;') AS c(rowid text, att1 text, att2 text, att3 text);
SELECT * FROM crosstab('SELECT rowid, attribute, val FROM ct where rowclass = ''group1'' ORDER BY 1,2;') AS c(rowid text, att1 text, att2 text, att3 text, att4 text);
-- check it works with OUT parameters, too
CREATE FUNCTION crosstab_out(text,
OUT rowid text, OUT att1 text, OUT att2 text, OUT att3 text)
RETURNS setof record
AS '$libdir/tablefunc','crosstab'
LANGUAGE 'C' STABLE STRICT;
SELECT * FROM crosstab_out('SELECT rowid, attribute, val FROM ct where rowclass = ''group1'' ORDER BY 1,2;');
--
-- hash based crosstab
@ -100,6 +110,35 @@ SELECT * FROM crosstab(
'SELECT DISTINCT attribute FROM cth WHERE false ORDER BY 1')
AS c(rowid text, rowdt timestamp, temperature text, test_result text, test_startdate text, volts text);
-- check it works with a named result rowtype
create type my_crosstab_result as (
rowid text, rowdt timestamp,
temperature int4, test_result text, test_startdate timestamp, volts float8);
CREATE FUNCTION crosstab_named(text, text)
RETURNS setof my_crosstab_result
AS '$libdir/tablefunc','crosstab_hash'
LANGUAGE 'C' STABLE STRICT;
SELECT * FROM crosstab_named(
'SELECT rowid, rowdt, attribute, val FROM cth ORDER BY 1',
'SELECT DISTINCT attribute FROM cth ORDER BY 1');
-- check it works with OUT parameters
CREATE FUNCTION crosstab_out(text, text,
OUT rowid text, OUT rowdt timestamp,
OUT temperature int4, OUT test_result text,
OUT test_startdate timestamp, OUT volts float8)
RETURNS setof record
AS '$libdir/tablefunc','crosstab_hash'
LANGUAGE 'C' STABLE STRICT;
SELECT * FROM crosstab_out(
'SELECT rowid, rowdt, attribute, val FROM cth ORDER BY 1',
'SELECT DISTINCT attribute FROM cth ORDER BY 1');
--
-- connectby
--