5 files changed, 15 insertions, 3 deletions
diff --git a/src/backend/nodes/copyfuncs.c b/src/backend/nodes/copyfuncs.c
index b4a597bb83c..a0ef3ff1407 100644
--- a/src/backend/nodes/copyfuncs.c
+++ b/src/backend/nodes/copyfuncs.c
@@ -3368,6 +3368,7 @@ _copyTableLikeClause(const TableLikeClause *from)
 
 	COPY_NODE_FIELD(relation);
 	COPY_SCALAR_FIELD(options);
+	COPY_SCALAR_FIELD(relationOid);
 
 	return newnode;
 }
diff --git a/src/backend/nodes/equalfuncs.c b/src/backend/nodes/equalfuncs.c
index 4f2ebe5118e..88e17a3a604 100644
--- a/src/backend/nodes/equalfuncs.c
+++ b/src/backend/nodes/equalfuncs.c
@@ -1252,6 +1252,7 @@ _equalTableLikeClause(const TableLikeClause *a, const TableLikeClause *b)
 {
 	COMPARE_NODE_FIELD(relation);
 	COMPARE_SCALAR_FIELD(options);
+	COMPARE_SCALAR_FIELD(relationOid);
 
 	return true;
 }
diff --git a/src/backend/nodes/outfuncs.c b/src/backend/nodes/outfuncs.c
index fc75384c07b..4a0e461d366 100644
--- a/src/backend/nodes/outfuncs.c
+++ b/src/backend/nodes/outfuncs.c
@@ -2746,6 +2746,7 @@ _outTableLikeClause(StringInfo str, const TableLikeClause *node)
 
 	WRITE_NODE_FIELD(relation);
 	WRITE_UINT_FIELD(options);
+	WRITE_OID_FIELD(relationOid);
 }
 
 static void
diff --git a/src/backend/parser/gram.y b/src/backend/parser/gram.y
index 32797728d2e..9de9dbd8a8a 100644
--- a/src/backend/parser/gram.y
+++ b/src/backend/parser/gram.y
@@ -3595,6 +3595,7 @@ TableLikeClause:
 					TableLikeClause *n = makeNode(TableLikeClause);
 					n->relation = $2;
 					n->options = $3;
+					n->relationOid = InvalidOid;
 					$$ = (Node *)n;
 				}
 		;
diff --git a/src/backend/parser/parse_utilcmd.c b/src/backend/parser/parse_utilcmd.c
index d3ef6f4ab58..577fe1e752e 100644
--- a/src/backend/parser/parse_utilcmd.c
+++ b/src/backend/parser/parse_utilcmd.c
@@ -1091,14 +1091,18 @@ transformTableLikeClause(CreateStmtContext *cxt, TableLikeClause *table_like_cla
 	 * we don't yet know what column numbers the copied columns will have in
 	 * the finished table.  If any of those options are specified, add the
 	 * LIKE clause to cxt->likeclauses so that expandTableLikeClause will be
-	 * called after we do know that.
+	 * called after we do know that.  Also, remember the relation OID so that
+	 * expandTableLikeClause is certain to open the same table.
 	 */
 	if (table_like_clause->options &
 		(CREATE_TABLE_LIKE_DEFAULTS |
 		 CREATE_TABLE_LIKE_GENERATED |
 		 CREATE_TABLE_LIKE_CONSTRAINTS |
 		 CREATE_TABLE_LIKE_INDEXES))
+	{
+		table_like_clause->relationOid = RelationGetRelid(relation);
 		cxt->likeclauses = lappend(cxt->likeclauses, table_like_clause);
+	}
 
 	/*
 	 * We may copy extended statistics if requested, since the representation
@@ -1171,9 +1175,13 @@ expandTableLikeClause(RangeVar *heapRel, TableLikeClause *table_like_clause)
 	 * Open the relation referenced by the LIKE clause.  We should still have
 	 * the table lock obtained by transformTableLikeClause (and this'll throw
 	 * an assertion failure if not).  Hence, no need to recheck privileges
-	 * etc.
+	 * etc.  We must open the rel by OID not name, to be sure we get the same
+	 * table.
 	 */
-	relation = relation_openrv(table_like_clause->relation, NoLock);
+	if (!OidIsValid(table_like_clause->relationOid))
+		elog(ERROR, "expandTableLikeClause called on untransformed LIKE clause");
+
+	relation = relation_open(table_like_clause->relationOid, NoLock);
 
 	tupleDesc = RelationGetDescr(relation);
 	constr = tupleDesc->constr;