MDEV-8715 - Obsolete sql_alloc() in favor of THD::alloc() and thd_alloc()

The following left in semi-improved state to keep patch size reasonable:
- Field operator new: left thd_alloc(current_thd)
- Sql_alloc operator new: left thd_alloc(thd_get_current_thd())
- Item_args constructors: left thd_alloc(thd)
- Item_func_interval::fix_length_and_dec(): no THD arg, have to call current_thd
- Item_func_dyncol_exists::val_int(): same
- Item_dyncol_get::val_str(): same
- Item_dyncol_get::val_int(): same
- Item_dyncol_get::val_real(): same
- Item_dyncol_get::val_decimal(): same
- Item_singlerow_subselect::fix_length_and_dec(): same

1 files changed, 1 insertions, 1 deletions

diff --git a/sql/field.h b/sql/field.h
index 5ad4dcf30b3..0591914b8c7 100644
--- a/sql/field.h
+++ b/sql/field.h
@@ -610,7 +610,7 @@ public:
   static void *operator new(size_t size, MEM_ROOT *mem_root) throw ()
   { return alloc_root(mem_root, size); }
   static void *operator new(size_t size) throw ()
-  { return sql_alloc(size); }
+  { return thd_alloc(current_thd, size); }
   static void operator delete(void *ptr_arg, size_t size) { TRASH(ptr_arg, size); }
   static void operator delete(void *ptr, MEM_ROOT *mem_root)
   { DBUG_ASSERT(0); }