Minor bugfix and make fetch_statentries_for_relation to be accesible by extensions.

Author: danolivo

src/backend/statistics/extended_stats.c

@@ -75,7 +75,6 @@ typedef struct StatExtEntry
 } StatExtEntry;
 
 
-static List *fetch_statentries_for_relation(Relation pg_statext, Oid relid);
 static VacAttrStats **lookup_var_attr_stats(Relation rel, Bitmapset *attrs, List *exprs,
 											int nvacatts, VacAttrStats **vacatts);
 static void statext_store(Oid statOid, bool inh,
@@ -420,7 +419,7 @@ statext_is_kind_built(HeapTuple htup, char type)
 /*
  * Return a list (of StatExtEntry) of statistics objects for the given relation.
  */
-static List *
+List *
 fetch_statentries_for_relation(Relation pg_statext, Oid relid)
 {
 	SysScanDesc scan;

src/backend/utils/cache/typcache.c

@@ -468,7 +468,7 @@ lookup_type_cache(Oid type_id, int flags)
 
 		tp = SearchSysCache1(TYPEOID, ObjectIdGetDatum(type_id));
 		if (!HeapTupleIsValid(tp))
-			ereport(PANIC,
+			ereport(ERROR,
 					(errcode(ERRCODE_UNDEFINED_OBJECT),
 					 errmsg("type with OID %u does not exist", type_id)));
 		typtup = (Form_pg_type) GETSTRUCT(tp);

src/include/statistics/statistics.h

@@ -101,6 +101,7 @@ extern MVNDistinct *statext_ndistinct_load(Oid mvoid, bool inh);
 extern MVDependencies *statext_dependencies_load(Oid mvoid, bool inh);
 extern MCVList *statext_mcv_load(Oid mvoid, bool inh);
 
+extern List *fetch_statentries_for_relation(Relation pg_statext, Oid relid);
 extern void BuildRelationExtStatistics(Relation onerel, bool inh, double totalrows,
 									   int numrows, HeapTuple *rows,
 									   int natts, VacAttrStats **vacattrstats);