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MDEV-19906 Port show_old_temporals from MySQL 5.6

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Old temporal data types (created with a pre-10.0 version of MariaDB)
are now displayed with a /* mariadb-5.3 */ comment in:

- SHOW CREATE TABLE
- DESCRIBE
- INFORMATION_SCHEMA.COLUMNS.COLUMN_TYPE

For example:

CREATE TABLE `t1` (
  `t0` datetime /* mariadb-5.3 */ DEFAULT NULL,
  `t6` datetime(6) /* mariadb-5.3 */ DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1

Note, new temporal data types are displayed without a format comment.
This commit is contained in:
Alexander Barkov
2020-01-16 13:29:29 +04:00
parent e7558d4760
commit 6f65931f88
10 changed files with 376 additions and 53 deletions
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6
sql/sql_show.cc
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@ -2116,12 +2116,6 @@ int show_create_table(THD *thd, TABLE_LIST *table_list, String *packet,
field->sql_type(type);
packet->append(type.ptr(), type.length(), system_charset_info);
DBUG_EXECUTE_IF("sql_type",
packet->append(" /* ");
packet->append(field->type_handler()->version().ptr());
packet->append(" */");
);
if (field->has_charset() && !(sql_mode & (MODE_MYSQL323 | MODE_MYSQL40)))
{
if (field->charset() != share->table_charset)