chickadee » postgresql » value-at

(value-at RES [COLUMN [ROW]] [raw: RAW])procedure

Returns the value at the specified COLUMN and ROW. It is parsed by an appropriate parser unless RAW is specified and #t. If RAW is true, the value is either a string, blob or an sql-null object. Otherwise, it depends on the parsers.

If ROW or COLUMN are not specified, they default to zero. This makes for more convenient syntax if you're just reading out a result of a query which always has one row or even one value.

See type conversion for more info on parsers.