I am trying to write a function in Postgresql, which takes 2 floats and
returns a box. But seems the nested single-quote in the AS clause prevent $1 and $2 from being expanded. Besides writing a C function instead of a SQL one, is there any way to solve this problem?
Thanks a lot. -Stan
CREATE OR REPLACE FUNCTION func_radec_to_box(float, float) RETURNS box
AS 'SELECT box \'(($1, $2), (1.3, 1.4))\''
LANGUAGE 'sql'
WITH (ISCACHABLE);
Error message: psql:func_radec_to_box.sql:4: ERROR: Bad box external representation '(($1, $2), (1.3, 1.4))'
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