From 5d009c50aae2925a2c490e83fef9e3b83da10530 Mon Sep 17 00:00:00 2001
From: Yugo Nagata <nagata@sraoss.co.jp>
Date: Fri, 20 Dec 2019 10:07:23 +0900
Subject: [PATCH v26 02/10] Add relisivm column to pg_class system catalog

If this boolean column is true, a relations is Incrementally Maintainable
Materialized View (IMMV). This is set when IMMV is created.
---
 src/backend/catalog/heap.c          |  1 +
 src/backend/catalog/index.c         |  1 +
 src/backend/utils/cache/lsyscache.c | 24 ++++++++++++++++++++++++
 src/backend/utils/cache/relcache.c  |  2 ++
 src/include/catalog/pg_class.h      |  3 +++
 src/include/utils/lsyscache.h       |  1 +
 src/include/utils/rel.h             |  2 ++
 7 files changed, 34 insertions(+)

diff --git a/src/backend/catalog/heap.c b/src/backend/catalog/heap.c
index 7e99de88b3..212a6293aa 100644
--- a/src/backend/catalog/heap.c
+++ b/src/backend/catalog/heap.c
@@ -935,6 +935,7 @@ InsertPgClassTuple(Relation pg_class_desc,
 	values[Anum_pg_class_relrewrite - 1] = ObjectIdGetDatum(rd_rel->relrewrite);
 	values[Anum_pg_class_relfrozenxid - 1] = TransactionIdGetDatum(rd_rel->relfrozenxid);
 	values[Anum_pg_class_relminmxid - 1] = MultiXactIdGetDatum(rd_rel->relminmxid);
+	values[Anum_pg_class_relisivm - 1] = BoolGetDatum(rd_rel->relisivm);
 	if (relacl != (Datum) 0)
 		values[Anum_pg_class_relacl - 1] = relacl;
 	else
diff --git a/src/backend/catalog/index.c b/src/backend/catalog/index.c
index 5e3fc2b35d..d861211f66 100644
--- a/src/backend/catalog/index.c
+++ b/src/backend/catalog/index.c
@@ -982,6 +982,7 @@ index_create(Relation heapRelation,
 	indexRelation->rd_rel->relowner = heapRelation->rd_rel->relowner;
 	indexRelation->rd_rel->relam = accessMethodObjectId;
 	indexRelation->rd_rel->relispartition = OidIsValid(parentIndexRelid);
+	indexRelation->rd_rel->relisivm = false;
 
 	/*
 	 * store index's pg_class entry
diff --git a/src/backend/utils/cache/lsyscache.c b/src/backend/utils/cache/lsyscache.c
index 1b7e11b93e..3275963886 100644
--- a/src/backend/utils/cache/lsyscache.c
+++ b/src/backend/utils/cache/lsyscache.c
@@ -2023,6 +2023,30 @@ get_rel_relispartition(Oid relid)
 		return false;
 }
 
+/*
+ * get_rel_relisivm
+ *
+ *		Returns the relisivm flag associated with a given relation.
+ */
+bool
+get_rel_relisivm(Oid relid)
+{
+	HeapTuple	tp;
+
+	tp = SearchSysCache1(RELOID, ObjectIdGetDatum(relid));
+	if (HeapTupleIsValid(tp))
+	{
+		Form_pg_class reltup = (Form_pg_class) GETSTRUCT(tp);
+		bool		result;
+
+		result = reltup->relisivm;
+		ReleaseSysCache(tp);
+		return result;
+	}
+	else
+		return false;
+}
+
 /*
  * get_rel_tablespace
  *
diff --git a/src/backend/utils/cache/relcache.c b/src/backend/utils/cache/relcache.c
index fccffce572..149c84535c 100644
--- a/src/backend/utils/cache/relcache.c
+++ b/src/backend/utils/cache/relcache.c
@@ -1903,6 +1903,8 @@ formrdesc(const char *relationName, Oid relationReltype,
 
 	/* ... and they're always populated, too */
 	relation->rd_rel->relispopulated = true;
+	/* ... and they're always no ivm, too */
+	relation->rd_rel->relisivm = false;
 
 	relation->rd_rel->relreplident = REPLICA_IDENTITY_NOTHING;
 	relation->rd_rel->relpages = 0;
diff --git a/src/include/catalog/pg_class.h b/src/include/catalog/pg_class.h
index 304e8c18d5..fbaa1438d6 100644
--- a/src/include/catalog/pg_class.h
+++ b/src/include/catalog/pg_class.h
@@ -119,6 +119,9 @@ CATALOG(pg_class,1259,RelationRelationId) BKI_BOOTSTRAP BKI_ROWTYPE_OID(83,Relat
 	/* is relation a partition? */
 	bool		relispartition BKI_DEFAULT(f);
 
+	/* is relation a matview with ivm? */
+	bool		relisivm BKI_DEFAULT(f);
+
 	/* link to original rel during table rewrite; otherwise 0 */
 	Oid			relrewrite BKI_DEFAULT(0) BKI_LOOKUP_OPT(pg_class);
 
diff --git a/src/include/utils/lsyscache.h b/src/include/utils/lsyscache.h
index b8dd27d4a9..cc2f635122 100644
--- a/src/include/utils/lsyscache.h
+++ b/src/include/utils/lsyscache.h
@@ -137,6 +137,7 @@ extern Oid	get_rel_namespace(Oid relid);
 extern Oid	get_rel_type_id(Oid relid);
 extern char get_rel_relkind(Oid relid);
 extern bool get_rel_relispartition(Oid relid);
+extern bool get_rel_relisivm(Oid relid);
 extern Oid	get_rel_tablespace(Oid relid);
 extern char get_rel_persistence(Oid relid);
 extern Oid	get_transform_fromsql(Oid typid, Oid langid, List *trftypes);
diff --git a/src/include/utils/rel.h b/src/include/utils/rel.h
index 3b4ab65ae2..fc6b6ddec8 100644
--- a/src/include/utils/rel.h
+++ b/src/include/utils/rel.h
@@ -650,6 +650,8 @@ RelationGetSmgr(Relation rel)
  */
 #define RelationIsPopulated(relation) ((relation)->rd_rel->relispopulated)
 
+#define RelationIsIVM(relation) ((relation)->rd_rel->relisivm)
+
 /*
  * RelationIsAccessibleInLogicalDecoding
  *		True if we need to log enough information to have access via
-- 
2.17.1