Waiting for 9.1 – Rewrite-less changing types of column

On 12th of February, Robert Haas committed patch: Teach ALTER TABLE .. SET DATA TYPE TO avoid SOME TABLE rewrites.   WHEN the OLD TYPE IS BINARY coercible TO the NEW TYPE AND the USING clause does NOT CHANGE the COLUMN contents, we can avoid a FULL TABLE rewrite, though any indexes ON the affected … Continue reading "Waiting for 9.1 – Rewrite-less changing types of column"