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, 2 deletions

diff --git a/sql/thr_malloc.h b/sql/thr_malloc.h
index d35207c655a..fc23c87c9fd 100644
--- a/sql/thr_malloc.h
+++ b/sql/thr_malloc.h
@@ -22,8 +22,7 @@ typedef struct st_mem_root MEM_ROOT;
 
 void init_sql_alloc(MEM_ROOT *root, uint block_size, uint pre_alloc_size,
                     myf my_flags);
-void *sql_alloc(size_t);
-char *sql_strmake_with_convert(const char *str, size_t arg_length,
+char *sql_strmake_with_convert(THD *thd, const char *str, size_t arg_length,
 			       CHARSET_INFO *from_cs,
 			       size_t max_res_length,
 			       CHARSET_INFO *to_cs, size_t *result_length);