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Hashed crosstab was dying with an SPI_finish error when the source SQL

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produced no rows. Now it returns 0 rows instead. Adjusted regression
test for this case.
This commit is contained in:
Joe Conway
2004-08-11 00:49:35 +00:00
parent 7d3b7db8da
commit bc8a1fc282
3 changed files with 39 additions and 15 deletions
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11
contrib/tablefunc/sql/tablefunc.sql
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@ -88,6 +88,17 @@ SELECT * FROM crosstab(
'SELECT DISTINCT rowdt, attribute FROM cth ORDER BY 2')
AS c(rowid text, rowdt timestamp, temperature int4, test_result text, test_startdate timestamp, volts float8);
-- if source query returns zero rows, get zero rows returned
SELECT * FROM crosstab(
'SELECT rowid, rowdt, attribute, val FROM cth WHERE false ORDER BY 1',
'SELECT DISTINCT attribute FROM cth ORDER BY 1')
AS c(rowid text, rowdt timestamp, temperature text, test_result text, test_startdate text, volts text);
-- if source query returns zero rows, get zero rows returned even if category query generates no rows
SELECT * FROM crosstab(
'SELECT rowid, rowdt, attribute, val FROM cth WHERE false ORDER BY 1',
'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);
--
-- connectby