Remove not used table_flag HA_NO_VARCHAR

sql/handler.h

@@ -151,7 +151,6 @@ enum enum_alter_inplace_result {
 #define HA_HAS_OLD_CHECKSUM    (1ULL << 24)
 /* Table data are stored in separate files (for lower_case_table_names) */
 #define HA_FILE_BASED	       (1ULL << 26)
-#define HA_NO_VARCHAR	       (1ULL << 27) /* unused */
 #define HA_CAN_BIT_FIELD       (1ULL << 28) /* supports bit fields */
 #define HA_NEED_READ_RANGE_BUFFER (1ULL << 29) /* for read_multi_range */
 #define HA_ANY_INDEX_MAY_BE_UNIQUE (1ULL << 30)

sql/sql_table.cc

@@ -2935,20 +2935,6 @@ uint Column_definition::pack_flag_numeric(uint dec) const
 
 bool Column_definition::prepare_stage2_varchar(ulonglong table_flags)
 {
-#ifndef QQ_ALL_HANDLERS_SUPPORT_VARCHAR
-  if (table_flags & HA_NO_VARCHAR)
-  {
-    /* convert VARCHAR to CHAR because handler is not yet up to date */
-    set_handler(&type_handler_var_string);
-    pack_length= type_handler()->calc_pack_length((uint) length);
-    if ((length / charset->mbmaxlen) > MAX_FIELD_CHARLENGTH)
-    {
-      my_error(ER_TOO_BIG_FIELDLENGTH, MYF(0), field_name.str,
-               static_cast<ulong>(MAX_FIELD_CHARLENGTH));
-      return true;
-    }
-  }
-#endif
   pack_flag= (charset->state & MY_CS_BINSORT) ? FIELDFLAG_BINARY : 0;
   return false;
 }