Add record_image_ops opclass for matview concurrent refresh.

REFRESH MATERIALIZED VIEW CONCURRENTLY was broken for any matview
containing a column of a type without a default btree operator
class.  It also did not produce results consistent with a non-
concurrent REFRESH or a normal view if any column was of a type
which allowed user-visible differences between values which
compared as equal according to the type's default btree opclass.
Concurrent matview refresh was modified to use the new operators
to solve these problems.

Documentation was added for record comparison, both for the
default btree operator class for record, and the newly added
operators.  Regression tests now check for proper behavior both
for a matview with a box column and a matview containing a citext
column.

Reviewed by Steve Singer, who suggested some of the doc language.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/include/catalog/pg_opclass.h b/src/include/catalog/pg_opclass.h
index f714db567e..0a3eb3e1f7 100644
--- a/src/include/catalog/pg_opclass.h
+++ b/src/include/catalog/pg_opclass.h
@@ -143,6 +143,7 @@ DATA(insert (	405		oid_ops				PGNSP PGUID 1990   26 t 0 ));
 DATA(insert (	403		oidvector_ops		PGNSP PGUID 1991   30 t 0 ));
 DATA(insert (	405		oidvector_ops		PGNSP PGUID 1992   30 t 0 ));
 DATA(insert (	403		record_ops			PGNSP PGUID 2994 2249 t 0 ));
+DATA(insert (	403		record_image_ops	PGNSP PGUID 3194 2249 f 0 ));
 DATA(insert OID = 3126 ( 403	text_ops	PGNSP PGUID 1994   25 t 0 ));
 #define TEXT_BTREE_OPS_OID 3126
 DATA(insert (	405		text_ops			PGNSP PGUID 1995   25 t 0 ));