Add a transform function for varbit typmod coercisions.
Robert Haas <rhaas@postgresql.org>
Add a transform function for varbit typmod coercisions. This enables ALTER TABLE to skip table and index rebuilds when the new type is unconstraint varbit, or when the allowable number of bits is not decreasing. Noah Misch, with review and a fix for an OID collision by me.
Files
| Path | Change | +/− |
|---|---|---|
| src/backend/utils/adt/varbit.c | modified | +35 −0 |
| src/include/catalog/catversion.h | modified | +1 −1 |
| src/include/catalog/pg_proc.h | modified | +3 −1 |
| src/include/utils/varbit.h | modified | +1 −0 |