Method init_expr_arena

sql/table.cc:67–76

#define MYSQL57_GCOL_HEADER_SIZE 4

bool TABLE::init_expr_arena(MEM_ROOT *mem_root)
{
  /*
    We need to use CONVENTIONAL_EXECUTION here to ensure that
    any new items created by fix_fields() are not reverted.
  */
  expr_arena= new (alloc_root(mem_root, sizeof(Query_arena)))
                Query_arena(mem_root, Query_arena::STMT_CONVENTIONAL_EXECUTION);
  return expr_arena == NULL;
}

struct extra2_fields
{