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-rw-r--r--sql/item.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/sql/item.h b/sql/item.h
index b7e6cc6c204..82f99106bc8 100644
--- a/sql/item.h
+++ b/sql/item.h
@@ -918,6 +918,7 @@ public:
virtual bool change_context_processor(uchar *context) { return 0; }
virtual bool reset_query_id_processor(uchar *query_id_arg) { return 0; }
virtual bool is_expensive_processor(uchar *arg) { return 0; }
+ virtual bool find_item_processor(uchar *arg) { return this == (void *) arg; }
virtual bool register_field_in_read_map(uchar *arg) { return 0; }
virtual bool cache_const_expr_analyzer(uchar **arg);
@@ -2316,7 +2317,10 @@ public:
return ref ? (*ref)->real_item() : this;
}
bool walk(Item_processor processor, bool walk_subquery, uchar *arg)
- { return (*ref)->walk(processor, walk_subquery, arg); }
+ {
+ return (*ref)->walk(processor, walk_subquery, arg) ||
+ (this->*processor)(arg);
+ }
virtual void print(String *str, enum_query_type query_type);
bool result_as_longlong()
{