Don't try to use Orca for queries that it doesn't support

src/backend/optimizer/plan/planner.c

@@ -231,6 +231,7 @@ standard_planner(Query *parse, int cursorOptions, ParamListInfo boundParams)
 	 * PARALLEL RETRIEVE CURSOR is not supported by ORCA yet.
 	 */
 	if (optimizer &&
+		!parse->usePostgresPlanner &&
 		GP_ROLE_DISPATCH == Gp_role &&
 		IS_QUERY_DISPATCHER() &&
 		(cursorOptions & CURSOR_OPT_PARALLEL_RETRIEVE) == 0)

src/backend/parser/analyze.c

@@ -355,6 +355,8 @@ transformStmt(ParseState *pstate, Node *parseTree)
 	if (pstate->p_hasDynamicFunction)
 		result->hasDynamicFunctions = true;
 
+	result->usePostgresPlanner = pstate->usePostgresPlanner;
+
 	return result;
 }
 

src/backend/parser/parse_clause.c

@@ -840,6 +840,8 @@ transformRangeFunction(ParseState *pstate, RangeFunction *r)
 
 					/* Now we set our special attribute in the rte. */
 					rte->forceDistRandom = true;
+					/* Orca doesn't support gp_dist_random */
+					pstate->usePostgresPlanner = true;
 
 					return rte;
 				}

src/backend/parser/parse_func.c

@@ -316,6 +316,10 @@ ParseFuncOrColumn(ParseState *pstate, List *funcname, List *fargs,
 					 errmsg("OVER specified, but %s is not a window function nor an aggregate function",
 							NameListToString(funcname)),
 					 parser_errposition(pstate, location)));
+
+		/* Orca supports only the any exec location */
+		if (func_exec_location(funcid) != PROEXECLOCATION_ANY)
+			pstate->usePostgresPlanner = true;
 	}
 	else if (fdresult == FUNCDETAIL_AGGREGATE)
 	{

src/backend/parser/parse_relation.c

@@ -1029,6 +1029,10 @@ parserOpenTable(ParseState *pstate, const RangeVar *relation,
 		}
 	}
 
+	/* Orca doesn't support queries on master-only tables */
+	if (rel->rd_cdbpolicy == NULL)
+		pstate->usePostgresPlanner = true;
+
 	cancel_parser_errposition_callback(&pcbstate);
 	return rel;
 }

src/include/nodes/parsenodes.h

@@ -215,6 +215,7 @@ typedef struct Query
 	 */
 	ParentStmtType	parentStmtType;
 	bool		expandMatViews; /* force expansion of materialized views during rewrite to treat as views */
+	bool		usePostgresPlanner; /* don't try to plan the query using Orca */
 } Query;
 
 /****************************************************************************

src/include/parser/parse_node.h

@@ -177,6 +177,8 @@ struct ParseState
 	ParseParamRefHook p_paramref_hook;
 	CoerceParamHook p_coerce_param_hook;
 	void	   *p_ref_hook_state;		/* common passthrough link for above */
+	bool		usePostgresPlanner; /* parse analysis found out that Orca
+									   doesn't support the query */
 };
 
 /*