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2c7cea28da
Problem: Empty queries are incremented if no rows are sent to the client in the EXECUTE phase of select query. With cursor protocol, rows are not sent during EXECUTE phase; they are sent later in FETCH phase. Hence, queries executed with cursor protocol are always falsely treated as empty in EXECUTE phase. Fix: For cursor protocol, empty queries are now counted during the FETCH phase. This ensures counter correctly reflects whether any rows were actually sent to the client. Tests included in `mysql-test/main/show.test`.
101 lines
3.4 KiB
Text
101 lines
3.4 KiB
Text
#
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# MDEV-9538 Server crashes in check_show_access on SHOW STATISTICS
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# MDEV-9539 Server crashes in make_columns_old_format on SHOW GEOMETRY_COLUMNS
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# MDEV-9540 SHOW SPATIAL_REF_SYS and SHOW SYSTEM_VARIABLES return empty results with numerous warnings
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#
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show statistics;
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ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'statistics' at line 1
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show spatial_ref_sys
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--error ER_PARSE_ERROR
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show system_variables;
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ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'spatial_ref_sys
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--error ER_PARSE_ERROR
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show system_variables' at line 2
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show geometry_columns;
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ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'geometry_columns' at line 1
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show nonexistent;
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ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'nonexistent' at line 1
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#
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# MDEV-21603 Crashing SHOW TABLES with derived table in WHERE condition
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#
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create table t1 (nm varchar(32), a int);
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insert t1 values ('1',1),('2',2),('3',3);
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show tables
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where tables_in_test in (select *
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from (select nm from test.t1 group by nm) dt);
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Tables_in_test
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show fields from test.t1
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where field in (select * from (select nm from test.t1 group by nm) dt);
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Field Type Null Key Default Extra
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insert t1 values ('nm',0);
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show fields from test.t1
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where field in (select * from (select nm from test.t1 group by nm) dt);
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Field Type Null Key Default Extra
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nm varchar(32) YES NULL
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show fields from test.t1 where field in
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(select * from (select column_name from information_schema.columns
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where table_name='t1' group by column_name) dt);
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Field Type Null Key Default Extra
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nm varchar(32) YES NULL
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a int(11) YES NULL
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drop table t1;
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#
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# MDEV-4621 select returns null for information_schema.statistics.collation field
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#
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create table t1 (f varchar(64), key(f));
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select index_name, column_name, collation, cardinality from information_schema.STATISTICS where table_schema='test' and table_name='t1';
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index_name column_name collation cardinality
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f f A NULL
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select index_name, column_name, collation from information_schema.STATISTICS where table_schema='test' and table_name='t1';
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index_name column_name collation
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f f A
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drop table t1;
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#
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# End of 10.2 tests
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#
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#
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# MDEV-28253 Mysqldump - INVISIBLE column error
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#
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create table t1 (a int, b datetime invisible on update now() without system versioning) with system versioning;
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desc t1;
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Field Type Null Key Default Extra
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a int(11) YES NULL
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b datetime YES NULL on update current_timestamp(), INVISIBLE, WITHOUT SYSTEM VERSIONING
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drop table t1;
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#
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# End of 10.3 tests
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#
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#
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# MDEV-31721: Cursor protocol increases the counter of "Empty_queries" for select
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#
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FLUSH STATUS;
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CREATE TABLE t1 (a INT);
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INSERT INTO t1 VALUES (1);
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SELECT COUNT(*) FROM t1;
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COUNT(*)
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1
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SELECT * FROM t1;
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a
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1
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SELECT * FROM t1 LIMIT 0;
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a
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SHOW STATUS LIKE "Empty_queries";
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Variable_name Value
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Empty_queries 1
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DROP TABLE t1;
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#------------------------------
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CREATE TABLE t1 (a INT);
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CREATE TABLE t2 (b INT);
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INSERT INTO t1 VALUES (1);
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INSERT INTO t2 VALUES (2);
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SELECT * FROM t1 UNION SELECT * FROM t2;
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a
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1
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2
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SELECT * FROM t1 UNION SELECT * FROM t2 LIMIT 0;
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a
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SHOW STATUS LIKE "Empty_queries";
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Variable_name Value
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Empty_queries 2
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DROP TABLE t1, t2;
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# End of 10.11 tests
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