Jinqiang Han wrote:
> it seems the crosstab function you write in contrib/tablefunc can't work.
> it saids that A column definition list is required for functions returning RECORD.
> How can i make it work?
From contrib/tablefunc/README.tablefunc:
Outputs
Returns setof record, which must defined with a column definition in the FROM clause of the SELECT statement, e.g.:
SELECT * FROM crosstab(sql, 2) AS ct(row_name text, category_1 text, category_2 text);
the example crosstab function produces a set something like: <== values columns ==>
row_name category_1 category_2 ---------+------------+------------ row1 val1 val2
row2 val5 val6
You are apparently forgetting the "AS ct(row_name text, category_1 text, category_2 text)"
part.
hope this helps,
Joe