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MDEV-15408 Confusing error message upon ER_VERS_FIELD_WRONG_TYPE while omitting UNSIGNED in BIGINT

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Improve diagnostics. Try to guess what type user tried to type.
This commit is contained in:
Eugene Kosov
2019-05-10 16:21:22 +03:00
committed by Sergei Golubchik
parent 3d56adbfac
commit 3d649c6e37
4 changed files with 108 additions and 71 deletions
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142
sql/handler.cc
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@ -7211,8 +7211,9 @@ bool Table_scope_and_contents_source_st::vers_check_system_fields(
{
if (!(options & HA_VERSIONED_TABLE))
return false;
return vers_info.check_sys_fields(create_table.table_name, create_table.db,
alter_info);
return vers_info.check_sys_fields(
create_table.table_name, create_table.db, alter_info,
ha_check_storage_engine_flag(db_type, HTON_NATIVE_SYS_VERSIONING));
}
@ -7321,7 +7322,11 @@ bool Vers_parse_info::fix_alter_info(THD *thd, Alter_info *alter_info,
if (alter_info->flags & ALTER_ADD_SYSTEM_VERSIONING)
{
if (check_sys_fields(table_name, share->db, alter_info))
const bool can_native=
ha_check_storage_engine_flag(create_info->db_type,
HTON_NATIVE_SYS_VERSIONING) ||
create_info->db_type->db_type == DB_TYPE_PARTITION_DB;
if (check_sys_fields(table_name, share->db, alter_info, can_native))
return true;
}
@ -7426,78 +7431,83 @@ bool Vers_parse_info::check_conditions(const Lex_table_name &table_name,
return false;
}
static bool is_versioning_timestamp(const Create_field *f)
{
return (f->type_handler() == &type_handler_datetime2 ||
f->type_handler() == &type_handler_timestamp2) &&
f->length == MAX_DATETIME_FULL_WIDTH;
}
static bool is_some_bigint(const Create_field *f)
{
return f->type_handler() == &type_handler_longlong ||
f->type_handler() == &type_handler_vers_trx_id;
}
static bool is_versioning_bigint(const Create_field *f)
{
return is_some_bigint(f) && f->flags & UNSIGNED_FLAG &&
f->length == MY_INT64_NUM_DECIMAL_DIGITS - 1;
}
static bool require_timestamp(const Create_field *f, Lex_table_name table_name)
{
my_error(ER_VERS_FIELD_WRONG_TYPE, MYF(0), f->field_name.str, "TIMESTAMP(6)",
table_name.str);
return true;
}
static bool require_bigint(const Create_field *f, Lex_table_name table_name)
{
my_error(ER_VERS_FIELD_WRONG_TYPE, MYF(0), f->field_name.str,
"BIGINT(20) UNSIGNED", table_name.str);
return true;
}
bool Vers_parse_info::check_sys_fields(const Lex_table_name &table_name,
const Lex_table_name &db,
Alter_info *alter_info)
Alter_info *alter_info, bool can_native)
{
if (check_conditions(table_name, db))
return true;
const Create_field *row_start= NULL;
const Create_field *row_end= NULL;
List_iterator<Create_field> it(alter_info->create_list);
uint found_flag= 0;
while (Create_field *f= it++)
{
vers_sys_type_t f_check_unit= VERS_UNDEFINED;
uint sys_flag= f->flags & VERS_SYSTEM_FIELD;
if (!sys_flag)
continue;
if (sys_flag & found_flag)
{
my_error(ER_VERS_DUPLICATE_ROW_START_END, MYF(0),
found_flag & VERS_SYS_START_FLAG ? "START" : "END",
f->field_name.str);
return true;
}
sys_flag|= found_flag;
if ((f->type_handler() == &type_handler_datetime2 ||
f->type_handler() == &type_handler_timestamp2) &&
f->length == MAX_DATETIME_FULL_WIDTH)
{
f_check_unit= VERS_TIMESTAMP;
}
else if (f->type_handler() == &type_handler_longlong
&& (f->flags & UNSIGNED_FLAG)
&& f->length == (MY_INT64_NUM_DECIMAL_DIGITS - 1))
{
f_check_unit= VERS_TRX_ID;
}
else
{
if (!check_unit)
check_unit= VERS_TIMESTAMP;
goto error;
}
if (f_check_unit)
{
if (check_unit)
{
if (check_unit == f_check_unit)
{
if (check_unit == VERS_TRX_ID && !TR_table::use_transaction_registry)
{
my_error(ER_VERS_TRT_IS_DISABLED, MYF(0));
return true;
}
return false;
}
error:
my_error(ER_VERS_FIELD_WRONG_TYPE, MYF(0), f->field_name.str,
check_unit == VERS_TIMESTAMP ?
"TIMESTAMP(6)" :
"BIGINT(20) UNSIGNED",
table_name.str);
return true;
}
check_unit= f_check_unit;
}
if (!row_start && f->flags & VERS_SYS_START_FLAG)
row_start= f;
else if (!row_end && f->flags & VERS_SYS_END_FLAG)
row_end= f;
}
my_error(ER_MISSING, MYF(0), table_name.str, found_flag & VERS_SYS_START_FLAG ?
"ROW END" : found_flag ? "ROW START" : "ROW START/END");
return true;
const bool expect_timestamp=
!can_native || !is_some_bigint(row_start) || !is_some_bigint(row_end);
if (expect_timestamp)
{
if (!is_versioning_timestamp(row_start))
return require_timestamp(row_start, table_name);
if (!is_versioning_timestamp(row_end))
return require_timestamp(row_end, table_name);
}
else
{
if (!is_versioning_bigint(row_start))
return require_bigint(row_start, table_name);
if (!is_versioning_bigint(row_end))
return require_bigint(row_end, table_name);
}
if (is_versioning_bigint(row_start) && is_versioning_bigint(row_end) &&
!TR_table::use_transaction_registry)
{
my_error(ER_VERS_TRT_IS_DISABLED, MYF(0));
return true;
}
return false;
}