Restore REINDEX constraint validation.

Refactoring as part of commit 8ceb24568054232696dddc1166a8563bc78c900a
had the unintended effect of making REINDEX TABLE and REINDEX DATABASE
no longer validate constraints enforced by the indexes in question;
REINDEX INDEX still did so.  Indexes marked invalid remained so, and
constraint violations arising from data corruption went undetected.
Back-patch to 9.0, like the causative commit.

3 files changed, 32 insertions, 9 deletions

diff --git a/src/backend/commands/indexcmds.c b/src/backend/commands/indexcmds.c
index 441b99fa243..09c8d62f5da 100644
--- a/src/backend/commands/indexcmds.c
+++ b/src/backend/commands/indexcmds.c
@@ -1606,7 +1606,7 @@ ReindexTable(RangeVar *relation)
 
 	ReleaseSysCache(tuple);
 
-	if (!reindex_relation(heapOid, true, 0))
+	if (!reindex_relation(heapOid, true, REINDEX_CHECK_CONSTRAINTS))
 		ereport(NOTICE,
 				(errmsg("table \"%s\" has no indexes",
 						relation->relname)));
@@ -1719,7 +1719,7 @@ ReindexDatabase(const char *databaseName, bool do_system, bool do_user)
 		StartTransactionCommand();
 		/* functions in indexes may want a snapshot set */
 		PushActiveSnapshot(GetTransactionSnapshot());
-		if (reindex_relation(relid, true, 0))
+		if (reindex_relation(relid, true, REINDEX_CHECK_CONSTRAINTS))
 			ereport(NOTICE,
 					(errmsg("table \"%s.%s\" was reindexed",
 							get_namespace_name(get_rel_namespace(relid)),
diff --git a/src/test/regress/expected/create_index.out b/src/test/regress/expected/create_index.out
index f2c09237303..b361201f4b8 100644
--- a/src/test/regress/expected/create_index.out
+++ b/src/test/regress/expected/create_index.out
@@ -890,9 +890,13 @@ COMMIT;
 BEGIN;
 CREATE INDEX std_index on concur_heap(f2);
 COMMIT;
--- check to make sure that the failed indexes were cleaned up properly and the
--- successful indexes are created properly. Notably that they do NOT have the
--- "invalid" flag set.
+-- Failed builds are left invalid by VACUUM FULL, fixed by REINDEX
+VACUUM FULL concur_heap;
+REINDEX TABLE concur_heap;
+ERROR:  could not create unique index "concur_index3"
+DETAIL:  Key (f2)=(b) is duplicated.
+DELETE FROM concur_heap WHERE f1 = 'b';
+VACUUM FULL concur_heap;
 \d concur_heap
 Table "public.concur_heap"
  Column | Type | Modifiers 
@@ -908,6 +912,22 @@ Indexes:
     "concur_index5" btree (f2) WHERE f1 = 'x'::text
     "std_index" btree (f2)
 
+REINDEX TABLE concur_heap;
+\d concur_heap
+Table "public.concur_heap"
+ Column | Type | Modifiers 
+--------+------+-----------
+ f1     | text | 
+ f2     | text | 
+Indexes:
+    "concur_index2" UNIQUE, btree (f1)
+    "concur_index3" UNIQUE, btree (f2)
+    "concur_heap_expr_idx" btree ((f2 || f1))
+    "concur_index1" btree (f2, f1)
+    "concur_index4" btree (f2) WHERE f1 = 'a'::text
+    "concur_index5" btree (f2) WHERE f1 = 'x'::text
+    "std_index" btree (f2)
+
 DROP TABLE concur_heap;
 --
 -- Tests for IS NULL/IS NOT NULL with b-tree indexes
diff --git a/src/test/regress/sql/create_index.sql b/src/test/regress/sql/create_index.sql
index 62f439c3f0f..9d9b2406ed1 100644
--- a/src/test/regress/sql/create_index.sql
+++ b/src/test/regress/sql/create_index.sql
@@ -369,10 +369,13 @@ BEGIN;
 CREATE INDEX std_index on concur_heap(f2);
 COMMIT;
 
--- check to make sure that the failed indexes were cleaned up properly and the
--- successful indexes are created properly. Notably that they do NOT have the
--- "invalid" flag set.
-
+-- Failed builds are left invalid by VACUUM FULL, fixed by REINDEX
+VACUUM FULL concur_heap;
+REINDEX TABLE concur_heap;
+DELETE FROM concur_heap WHERE f1 = 'b';
+VACUUM FULL concur_heap;
+\d concur_heap
+REINDEX TABLE concur_heap;
 \d concur_heap
 
 DROP TABLE concur_heap;