MDEV-7113 difference between check_vcol_func_processor and check_partition_func_processor

MDEV-6789 segfault in Item_func_from_unixtime::get_date on updating table with virtual columns

* prohibit VALUES in partitioning expression
* prohibit user and system variables in virtual column expressions
* fix Item_func_date_format to cache locale (for %M/%W to return the same as MONTHNAME/DAYNAME)
* fix Item_func_from_unixtime to cache time_zone directly, not THD (and not to crash)
* added tests for other incorrectly allowed (in vcols) functions to see that they don't crash

1 files changed, 1 insertions, 0 deletions

diff --git a/sql/item.h b/sql/item.h
index f7ee860390f..57e91e5b3d8 100644
--- a/sql/item.h
+++ b/sql/item.h
@@ -3939,6 +3939,7 @@ public:
     return arg->walk(processor, walk_subquery, args) ||
 	    (this->*processor)(args);
   }
+  bool check_partition_func_processor(uchar *int_arg) {return TRUE;}
   bool check_vcol_func_processor(uchar *arg) 
   {
     return trace_unsupported_by_check_vcol_func_processor("values");