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-rw-r--r--mysql-test/main/limit_rows_examined.result897
1 files changed, 897 insertions, 0 deletions
diff --git a/mysql-test/main/limit_rows_examined.result b/mysql-test/main/limit_rows_examined.result
new file mode 100644
index 00000000..50b542fa
--- /dev/null
+++ b/mysql-test/main/limit_rows_examined.result
@@ -0,0 +1,897 @@
+call mtr.add_suppression("Sort aborted.*");
+set @save_join_cache_level = @@join_cache_level;
+create table t1 (c1 char(2));
+create table t2 (c2 char(2));
+insert into t1 values ('bb'), ('cc'), ('aa'), ('dd');
+insert into t2 values ('bb'), ('cc'), ('dd'), ('ff');
+create table t1i (c1 char(2) key);
+create table t2i (c2 char(2) key);
+insert into t1i values ('bb'), ('cc'), ('aa'), ('dd');
+insert into t2i values ('bb'), ('cc'), ('dd'), ('ff');
+=========================================================================
+Simple joins
+=========================================================================
+Simple nested loops join without blocking
+set @@join_cache_level=0;
+explain
+select * from t1, t2 where c1 = c2 LIMIT ROWS EXAMINED 2;
+id select_type table type possible_keys key key_len ref rows Extra
+1 SIMPLE t1 ALL NULL NULL NULL NULL 4
+1 SIMPLE t2 ALL NULL NULL NULL NULL 4 Using where
+select * from t1, t2 where c1 = c2 LIMIT ROWS EXAMINED 2;
+c1 c2
+bb bb
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 2. The query result may be incomplete
+explain
+select * from t1i, t2i where c1 = c2 LIMIT ROWS EXAMINED 4;
+id select_type table type possible_keys key key_len ref rows Extra
+1 SIMPLE t1i index PRIMARY PRIMARY 2 NULL 4 Using index
+1 SIMPLE t2i eq_ref PRIMARY PRIMARY 2 test.t1i.c1 1 Using index
+select * from t1i, t2i where c1 = c2 LIMIT ROWS EXAMINED 4;
+c1 c2
+bb bb
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 4. The query result may be incomplete
+Blocked nested loops join, empty result set because of blocking
+set @@join_cache_level=1;
+explain
+select * from t1, t2 where c1 = c2 LIMIT ROWS EXAMINED 6;
+id select_type table type possible_keys key key_len ref rows Extra
+1 SIMPLE t1 ALL NULL NULL NULL NULL 4
+1 SIMPLE t2 ALL NULL NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join)
+select * from t1, t2 where c1 = c2 LIMIT ROWS EXAMINED 6;
+c1 c2
+bb bb
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 6. The query result may be incomplete
+explain
+select * from t1i, t2i where c1 = c2 LIMIT ROWS EXAMINED 6;
+id select_type table type possible_keys key key_len ref rows Extra
+1 SIMPLE t1i index PRIMARY PRIMARY 2 NULL 4 Using index
+1 SIMPLE t2i eq_ref PRIMARY PRIMARY 2 test.t1i.c1 1 Using index
+select * from t1i, t2i where c1 = c2 LIMIT ROWS EXAMINED 6;
+c1 c2
+bb bb
+cc cc
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 6. The query result may be incomplete
+set @@join_cache_level=6;
+explain
+select * from t1, t2 where c1 = c2 LIMIT ROWS EXAMINED 3;
+id select_type table type possible_keys key key_len ref rows Extra
+1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using where
+1 SIMPLE t2 hash_ALL NULL #hash#$hj 3 test.t1.c1 4 Using where; Using join buffer (flat, BNLH join)
+select * from t1, t2 where c1 = c2 LIMIT ROWS EXAMINED 3;
+c1 c2
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 3. The query result may be incomplete
+explain
+select * from t1i, t2i where c1 = c2 LIMIT ROWS EXAMINED 6;
+id select_type table type possible_keys key key_len ref rows Extra
+1 SIMPLE t1i index PRIMARY PRIMARY 2 NULL 4 Using index
+1 SIMPLE t2i eq_ref PRIMARY PRIMARY 2 test.t1i.c1 1 Using index
+select * from t1i, t2i where c1 = c2 LIMIT ROWS EXAMINED 6;
+c1 c2
+bb bb
+cc cc
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 6. The query result may be incomplete
+Mix LIMIT ROWS EXAMINED with LIMIT
+set @@join_cache_level=0;
+explain
+select * from t1, t2 where c1 < c2 LIMIT 1 ROWS EXAMINED 4;
+id select_type table type possible_keys key key_len ref rows Extra
+1 SIMPLE t1 ALL NULL NULL NULL NULL 4
+1 SIMPLE t2 ALL NULL NULL NULL NULL 4 Using where
+select * from t1, t2 where c1 < c2 LIMIT 1 ROWS EXAMINED 4;
+c1 c2
+bb cc
+explain
+select * from t1, t2 where c1 < c2 LIMIT 1,1 ROWS EXAMINED 4;
+id select_type table type possible_keys key key_len ref rows Extra
+1 SIMPLE t1 ALL NULL NULL NULL NULL 4
+1 SIMPLE t2 ALL NULL NULL NULL NULL 4 Using where
+select * from t1, t2 where c1 < c2 LIMIT 1,1 ROWS EXAMINED 4;
+c1 c2
+bb dd
+Empty table optimized away during constant optimization
+create table t0 (c0 int);
+explain
+select * from t0 LIMIT ROWS EXAMINED 0;
+id select_type table type possible_keys key key_len ref rows Extra
+1 SIMPLE t0 system NULL NULL NULL NULL 0 Const row not found
+explain
+select * from t0 LIMIT ROWS EXAMINED 1;
+id select_type table type possible_keys key key_len ref rows Extra
+1 SIMPLE t0 system NULL NULL NULL NULL 0 Const row not found
+select * from t0 LIMIT ROWS EXAMINED 1;
+c0
+drop table t0;
+create table t0 (c0 char(2) primary key);
+insert into t0 values ('bb'), ('cc'), ('aa');
+explain
+select * from t0 where c0 = 'bb' LIMIT ROWS EXAMINED 0;
+id select_type table type possible_keys key key_len ref rows Extra
+1 SIMPLE t0 const PRIMARY PRIMARY 2 const 1 Using index
+select * from t0 where c0 = 'bb' LIMIT ROWS EXAMINED 0;
+c0
+bb
+explain
+select * from t0, t1 where c0 = 'bb' and c1 > c0 LIMIT ROWS EXAMINED 0;
+id select_type table type possible_keys key key_len ref rows Extra
+1 SIMPLE t0 const PRIMARY PRIMARY 2 const 1 Using index
+1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using where
+select * from t0, t1 where c0 = 'bb' and c1 > c0 LIMIT ROWS EXAMINED 0;
+c0 c1
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 0. The query result may be incomplete
+set @@join_cache_level = @save_join_cache_level;
+drop table t0;
+=========================================================================
+LIMIT ROWS EXAMINED with parameter argument
+=========================================================================
+set @@join_cache_level=0;
+set @l = 2;
+Prepared statement parameter
+prepare st1 from "select * from t1, t2 where c1 = c2 LIMIT ROWS EXAMINED ?";
+execute st1 using @l;
+c1 c2
+bb bb
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 2. The query result may be incomplete
+deallocate prepare st1;
+User variable (not supported for LIMIT in MariaDB 5.3/MySQL 5.1)
+select * from t1, t2 where c1 = c2 LIMIT ROWS EXAMINED @l;
+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 '@l' at line 1
+Stored procedure parameter
+create procedure test_limit_rows(l int)
+begin
+select * from t1, t2 where c1 = c2 LIMIT ROWS EXAMINED l;
+end|
+call test_limit_rows(3);
+c1 c2
+bb bb
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 3. The query result may be incomplete
+drop procedure test_limit_rows;
+set @@join_cache_level = @save_join_cache_level;
+=========================================================================
+UNIONs (with several LIMIT ROWS EXAMINED clauses)
+=========================================================================
+(select * from t1, t2 where c1 = c2)
+UNION
+(select * from t1, t2 where c1 < c2) LIMIT ROWS EXAMINED 6;
+c1 c2
+bb bb
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 6. The query result may be incomplete
+(select * from t1, t2 where c1 = c2 LIMIT ROWS EXAMINED 0)
+UNION
+(select * from t1, t2 where c1 < c2 LIMIT ROWS EXAMINED 6);
+c1 c2
+bb bb
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 6. The query result may be incomplete
+select * from t1, t2 where c1 = c2 LIMIT ROWS EXAMINED 0
+UNION
+select * from t1, t2 where c1 < c2 LIMIT ROWS EXAMINED 6;
+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 'UNION
+select * from t1, t2 where c1 < c2 LIMIT ROWS EXAMINED 6' at line 2
+(select * from t1, t2 where c1 = c2 LIMIT ROWS EXAMINED 0)
+UNION
+(select * from t1, t2 where c1 < c2 LIMIT ROWS EXAMINED 0)
+LIMIT ROWS EXAMINED 6;
+c1 c2
+bb bb
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 6. The query result may be incomplete
+(select * from t1, t2 where c1 = c2 LIMIT ROWS EXAMINED 0)
+UNION
+(select * from t1, t2 where c1 < c2 LIMIT ROWS EXAMINED 0)
+LIMIT 1 ROWS EXAMINED 6;
+c1 c2
+bb bb
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 6. The query result may be incomplete
+(select * from t1, t2 where c1 = c2 LIMIT ROWS EXAMINED 0)
+UNION
+(select * from t1, t2 where c1 < c2 LIMIT ROWS EXAMINED 0)
+LIMIT 2 ROWS EXAMINED 10;
+c1 c2
+bb bb
+cc cc
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 10. The query result may be incomplete
+=========================================================================
+Subqueries (with several LIMIT ROWS EXAMINED clauses)
+=========================================================================
+Subqueries, semi-join
+explain
+select * from t1
+where c1 IN (select * from t2 where c2 > ' ' LIMIT ROWS EXAMINED 11);
+id select_type table type possible_keys key key_len ref rows Extra
+1 PRIMARY t1 ALL NULL NULL NULL NULL 4
+1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 2 func 1
+2 MATERIALIZED t2 ALL NULL NULL NULL NULL 4 Using where
+select * from t1
+where c1 IN (select * from t2 where c2 > ' ' LIMIT ROWS EXAMINED 11);
+c1
+bb
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 11. The query result may be incomplete
+explain
+select * from t1
+where c1 IN (select * from t2 where c2 > ' ')
+LIMIT ROWS EXAMINED 11;
+id select_type table type possible_keys key key_len ref rows Extra
+1 PRIMARY t1 ALL NULL NULL NULL NULL 4
+1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 2 func 1
+2 MATERIALIZED t2 ALL NULL NULL NULL NULL 4 Using where
+select * from t1
+where c1 IN (select * from t2 where c2 > ' ')
+LIMIT ROWS EXAMINED 11;
+c1
+bb
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 11. The query result may be incomplete
+explain
+select * from t1
+where c1 IN (select * from t2 where c2 > ' ' LIMIT ROWS EXAMINED 0)
+LIMIT ROWS EXAMINED 11;
+id select_type table type possible_keys key key_len ref rows Extra
+1 PRIMARY t1 ALL NULL NULL NULL NULL 4
+1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 2 func 1
+2 MATERIALIZED t2 ALL NULL NULL NULL NULL 4 Using where
+select * from t1
+where c1 IN (select * from t2 where c2 > ' ' LIMIT ROWS EXAMINED 0)
+LIMIT ROWS EXAMINED 11;
+c1
+bb
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 11. The query result may be incomplete
+explain
+select * from t1i
+where c1 IN (select * from t2i where c2 > ' ')
+LIMIT ROWS EXAMINED 6;
+id select_type table type possible_keys key key_len ref rows Extra
+1 PRIMARY t1i range PRIMARY PRIMARY 2 NULL 4 Using where; Using index
+1 PRIMARY t2i eq_ref PRIMARY PRIMARY 2 test.t1i.c1 1 Using index
+select * from t1i
+where c1 IN (select * from t2i where c2 > ' ')
+LIMIT ROWS EXAMINED 6;
+c1
+bb
+cc
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 6. The query result may be incomplete
+Subqueries with IN-TO-EXISTS
+set @@optimizer_switch='semijoin=off,in_to_exists=on,materialization=off';
+explain
+select * from t1
+where c1 IN (select * from t2 where c2 > ' ' LIMIT ROWS EXAMINED 4);
+id select_type table type possible_keys key key_len ref rows Extra
+1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
+2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 4 Using where
+select * from t1
+where c1 IN (select * from t2 where c2 > ' ' LIMIT ROWS EXAMINED 4);
+c1
+bb
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 4. The query result may be incomplete
+explain
+select * from t1
+where c1 IN (select * from t2 where c2 > ' ')
+LIMIT ROWS EXAMINED 4;
+id select_type table type possible_keys key key_len ref rows Extra
+1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
+2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 4 Using where
+select * from t1
+where c1 IN (select * from t2 where c2 > ' ')
+LIMIT ROWS EXAMINED 4;
+c1
+bb
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 4. The query result may be incomplete
+explain
+select * from t1
+where c1 IN (select * from t2 where c2 > ' ' LIMIT ROWS EXAMINED 0)
+LIMIT ROWS EXAMINED 4;
+id select_type table type possible_keys key key_len ref rows Extra
+1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
+2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 4 Using where
+select * from t1
+where c1 IN (select * from t2 where c2 > ' ' LIMIT ROWS EXAMINED 0)
+LIMIT ROWS EXAMINED 4;
+c1
+bb
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 4. The query result may be incomplete
+explain
+select * from t1i
+where c1 IN (select * from t2i where c2 > ' ')
+LIMIT ROWS EXAMINED 9;
+id select_type table type possible_keys key key_len ref rows Extra
+1 PRIMARY t1i index NULL PRIMARY 2 NULL 4 Using where; Using index
+2 DEPENDENT SUBQUERY t2i unique_subquery PRIMARY PRIMARY 2 func 1 Using index; Using where
+select * from t1i
+where c1 IN (select * from t2i where c2 > ' ')
+LIMIT ROWS EXAMINED 9;
+c1
+bb
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 9. The query result may be incomplete
+Same as above, without subquery cache
+set @@optimizer_switch='subquery_cache=off';
+select * from t1
+where c1 IN (select * from t2 where c2 > ' ' LIMIT ROWS EXAMINED 2);
+c1
+bb
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 2. The query result may be incomplete
+select * from t1
+where c1 IN (select * from t2 where c2 > ' ')
+LIMIT ROWS EXAMINED 2;
+c1
+bb
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 2. The query result may be incomplete
+select * from t1
+where c1 IN (select * from t2 where c2 > ' ' LIMIT ROWS EXAMINED 0)
+LIMIT ROWS EXAMINED 2;
+c1
+bb
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 2. The query result may be incomplete
+select * from t1i
+where c1 IN (select * from t2i where c2 > ' ')
+LIMIT ROWS EXAMINED 5;
+c1
+bb
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 5. The query result may be incomplete
+Subqueries with materialization
+set @@optimizer_switch='semijoin=off,in_to_exists=off,materialization=on,subquery_cache=on';
+explain
+select * from t1
+where c1 IN (select * from t2 where c2 > ' ' LIMIT ROWS EXAMINED 13);
+id select_type table type possible_keys key key_len ref rows Extra
+1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
+2 MATERIALIZED t2 ALL NULL NULL NULL NULL 4 Using where
+select * from t1
+where c1 IN (select * from t2 where c2 > ' ' LIMIT ROWS EXAMINED 13);
+c1
+bb
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 13. The query result may be incomplete
+explain
+select * from t1
+where c1 IN (select * from t2 where c2 > ' ') LIMIT ROWS EXAMINED 13;
+id select_type table type possible_keys key key_len ref rows Extra
+1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
+2 MATERIALIZED t2 ALL NULL NULL NULL NULL 4 Using where
+select * from t1
+where c1 IN (select * from t2 where c2 > ' ') LIMIT ROWS EXAMINED 13;
+c1
+bb
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 13. The query result may be incomplete
+explain
+select * from t1
+where c1 IN (select * from t2 where c2 > ' ' LIMIT ROWS EXAMINED 0)
+LIMIT ROWS EXAMINED 13;
+id select_type table type possible_keys key key_len ref rows Extra
+1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
+2 MATERIALIZED t2 ALL NULL NULL NULL NULL 4 Using where
+select * from t1
+where c1 IN (select * from t2 where c2 > ' ' LIMIT ROWS EXAMINED 0)
+LIMIT ROWS EXAMINED 13;
+c1
+bb
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 13. The query result may be incomplete
+explain
+select * from t1i
+where c1 IN (select * from t2i where c2 > ' ') LIMIT ROWS EXAMINED 17;
+id select_type table type possible_keys key key_len ref rows Extra
+1 PRIMARY t1i index NULL PRIMARY 2 NULL 4 Using where; Using index
+2 MATERIALIZED t2i range PRIMARY PRIMARY 2 NULL 4 Using where; Using index
+select * from t1i
+where c1 IN (select * from t2i where c2 > ' ') LIMIT ROWS EXAMINED 17;
+c1
+bb
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 17. The query result may be incomplete
+set @@optimizer_switch='default';
+=========================================================================
+Views and derived tables
+=========================================================================
+create view v1 as
+select * from t1 where c1 IN (select * from t2 where c2 > ' ' LIMIT ROWS EXAMINED 13);
+ERROR 42000: This version of MariaDB doesn't yet support 'LIMIT ROWS EXAMINED inside views'
+create view v1 as
+select * from t1 where c1 IN (select * from t2 where c2 > ' ');
+select * from v1;
+c1
+bb
+cc
+dd
+select * from v1 LIMIT ROWS EXAMINED 17;
+c1
+bb
+cc
+dd
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 17. The query result may be incomplete
+select * from v1 LIMIT ROWS EXAMINED 16;
+c1
+bb
+cc
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 16. The query result may be incomplete
+select * from v1 LIMIT ROWS EXAMINED 11;
+c1
+bb
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 11. The query result may be incomplete
+drop view v1;
+explain
+select *
+from (select * from t1
+where c1 IN (select * from t2 where c2 > ' ' LIMIT ROWS EXAMINED 0)) as tmp
+LIMIT ROWS EXAMINED 11;
+id select_type table type possible_keys key key_len ref rows Extra
+1 PRIMARY t1 ALL NULL NULL NULL NULL 4
+1 PRIMARY <subquery3> eq_ref distinct_key distinct_key 2 func 1
+3 MATERIALIZED t2 ALL NULL NULL NULL NULL 4 Using where
+select *
+from (select * from t1
+where c1 IN (select * from t2 where c2 > ' ' LIMIT ROWS EXAMINED 0)) as tmp
+LIMIT ROWS EXAMINED 11;
+c1
+bb
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 11. The query result may be incomplete
+=========================================================================
+Aggregation
+=========================================================================
+create table t3 (c1 char(2), c2 int);
+insert into t3 values
+('aa', 1), ('aa', 2),
+('bb', 3), ('bb', 4), ('bb', 5);
+explain
+select c1, sum(c2) from t3 group by c1;
+id select_type table type possible_keys key key_len ref rows Extra
+1 SIMPLE t3 ALL NULL NULL NULL NULL 5 Using temporary; Using filesort
+select c1, sum(c2) from t3 group by c1;
+c1 sum(c2)
+aa 3
+bb 12
+explain
+select c1, sum(c2) from t3 group by c1 LIMIT ROWS EXAMINED 0;
+id select_type table type possible_keys key key_len ref rows Extra
+1 SIMPLE t3 ALL NULL NULL NULL NULL 5 Using temporary; Using filesort
+select c1, sum(c2) from t3 group by c1 LIMIT ROWS EXAMINED 0;
+c1 sum(c2)
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 0. The query result may be incomplete
+select c1, sum(c2) from t3 group by c1 LIMIT ROWS EXAMINED 1;
+c1 sum(c2)
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 1. The query result may be incomplete
+select c1, sum(c2) from t3 group by c1 LIMIT ROWS EXAMINED 20;
+c1 sum(c2)
+aa 3
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 20. The query result may be incomplete
+select c1, sum(c2) from t3 group by c1 LIMIT ROWS EXAMINED 21;
+c1 sum(c2)
+aa 3
+bb 12
+create table t3i (c1 char(2), c2 int);
+create index it3i on t3i(c1);
+create index it3j on t3i(c2,c1);
+insert into t3i values
+('aa', 1), ('aa', 2),
+('bb', 3), ('bb', 4), ('bb', 5);
+explain
+select c1, sum(c2) from t3i group by c1 LIMIT ROWS EXAMINED 0;
+id select_type table type possible_keys key key_len ref rows Extra
+1 SIMPLE t3i index NULL it3j 8 NULL 5 Using index; Using temporary; Using filesort
+select c1, sum(c2) from t3i group by c1 LIMIT ROWS EXAMINED 0;
+c1 sum(c2)
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 0. The query result may be incomplete
+select c1, sum(c2) from t3i group by c1 LIMIT ROWS EXAMINED 1;
+c1 sum(c2)
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 1. The query result may be incomplete
+select c1, sum(c2) from t3i group by c1 LIMIT ROWS EXAMINED 20;
+c1 sum(c2)
+aa 3
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 20. The query result may be incomplete
+select c1, sum(c2) from t3i group by c1 LIMIT ROWS EXAMINED 21;
+c1 sum(c2)
+aa 3
+bb 12
+Aggregation without grouping
+explain
+select min(c2) from t3 LIMIT ROWS EXAMINED 5;
+id select_type table type possible_keys key key_len ref rows Extra
+1 SIMPLE t3 ALL NULL NULL NULL NULL 5
+select min(c2) from t3 LIMIT ROWS EXAMINED 5;
+min(c2)
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 5. The query result may be incomplete
+select max(c2) from t3 LIMIT ROWS EXAMINED 6;
+max(c2)
+5
+select max(c2) from t3 LIMIT ROWS EXAMINED 0;
+max(c2)
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 0. The query result may be incomplete
+explain
+select max(c2) from t3 where c2 > 10 LIMIT ROWS EXAMINED 5;
+id select_type table type possible_keys key key_len ref rows Extra
+1 SIMPLE t3 ALL NULL NULL NULL NULL 5 Using where
+select max(c2) from t3 where c2 > 10 LIMIT ROWS EXAMINED 5;
+max(c2)
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 5. The query result may be incomplete
+select max(c2) from t3 where c2 > 10 LIMIT ROWS EXAMINED 6;
+max(c2)
+NULL
+select max(c2) from t3 where c2 > 10 LIMIT ROWS EXAMINED 0;
+max(c2)
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 0. The query result may be incomplete
+explain
+select count(c2) from t3 LIMIT ROWS EXAMINED 5;
+id select_type table type possible_keys key key_len ref rows Extra
+1 SIMPLE t3 ALL NULL NULL NULL NULL 5
+select count(c2) from t3 LIMIT ROWS EXAMINED 5;
+count(c2)
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 5. The query result may be incomplete
+select count(c2) from t3 LIMIT ROWS EXAMINED 6;
+count(c2)
+5
+select count(c2) from t3 LIMIT ROWS EXAMINED 0;
+count(c2)
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 0. The query result may be incomplete
+explain
+select count(c2) from t3 where c2 > 10 LIMIT ROWS EXAMINED 5;
+id select_type table type possible_keys key key_len ref rows Extra
+1 SIMPLE t3 ALL NULL NULL NULL NULL 5 Using where
+select count(c2) from t3 where c2 > 10 LIMIT ROWS EXAMINED 5;
+count(c2)
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 5. The query result may be incomplete
+select count(c2) from t3 where c2 > 10 LIMIT ROWS EXAMINED 6;
+count(c2)
+0
+explain
+select sum(c2) from t3 LIMIT ROWS EXAMINED 5;
+id select_type table type possible_keys key key_len ref rows Extra
+1 SIMPLE t3 ALL NULL NULL NULL NULL 5
+select sum(c2) from t3 LIMIT ROWS EXAMINED 5;
+sum(c2)
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 5. The query result may be incomplete
+select sum(c2) from t3 LIMIT ROWS EXAMINED 6;
+sum(c2)
+15
+The query result is found during optimization, LIMIT ROWS EXAMINED has no effect.
+explain
+select max(c1) from t3i LIMIT ROWS EXAMINED 0;
+id select_type table type possible_keys key key_len ref rows Extra
+1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
+select max(c1) from t3i LIMIT ROWS EXAMINED 0;
+max(c1)
+bb
+create table t3_empty like t3;
+explain
+select max(c1) from t3_empty LIMIT ROWS EXAMINED 0;
+id select_type table type possible_keys key key_len ref rows Extra
+1 SIMPLE t3_empty system NULL NULL NULL NULL 0 Const row not found
+select max(c1) from t3_empty LIMIT ROWS EXAMINED 0;
+max(c1)
+NULL
+drop table t3_empty;
+=========================================================================
+Sorting
+=========================================================================
+explain
+select c1, c2 from t3 order by c2, c1 LIMIT ROWS EXAMINED 2;
+id select_type table type possible_keys key key_len ref rows Extra
+1 SIMPLE t3 ALL NULL NULL NULL NULL 5 Using filesort
+select c1, c2 from t3 order by c2, c1 LIMIT ROWS EXAMINED 2;
+ERROR HY000: Sort aborted:
+explain
+select c1, c2 from t3i order by c2, c1 LIMIT ROWS EXAMINED 2;
+id select_type table type possible_keys key key_len ref rows Extra
+1 SIMPLE t3i index NULL it3j 8 NULL 5 Using index
+select c1, c2 from t3i order by c2, c1 LIMIT ROWS EXAMINED 2;
+c1 c2
+aa 1
+aa 2
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 2. The query result may be incomplete
+explain
+select c1, c2 from t3i order by c2, c1 desc LIMIT ROWS EXAMINED 2;
+id select_type table type possible_keys key key_len ref rows Extra
+1 SIMPLE t3i index NULL it3j 8 NULL 5 Using index; Using filesort
+select c1, c2 from t3i order by c2, c1 desc LIMIT ROWS EXAMINED 2;
+ERROR HY000: Sort aborted:
+drop table t3,t3i;
+=========================================================================
+INSERT/DELETE/UPDATE
+=========================================================================
+INSERT ... SELECT
+CREATE TABLE t4 (a int);
+INSERT INTO t4 values (1), (2);
+INSERT IGNORE INTO t4 SELECT a + 2 FROM t4 LIMIT ROWS EXAMINED 0;
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 0. The query result may be incomplete
+select * from t4;
+a
+1
+2
+INSERT INTO t4 SELECT a + 2 FROM t4 LIMIT ROWS EXAMINED 6;
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 6. The query result may be incomplete
+select * from t4;
+a
+1
+2
+3
+drop table t4;
+DELETE - LIMIT ROWS EXAMINED not supported
+CREATE TABLE t4 (a int);
+INSERT INTO t4 values (1), (2);
+DELETE FROM t4 WHERE t4.a > 0 LIMIT ROWS EXAMINED 0;
+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 'EXAMINED 0' at line 1
+DELETE FROM t4 WHERE t4.a > 0 LIMIT 0 ROWS EXAMINED 0;
+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 'EXAMINED 0' at line 1
+drop table t4;
+UPDATE - LIMIT ROWS EXAMINED not supported
+CREATE TABLE t4 (a int);
+INSERT INTO t4 values (1), (2);
+update t4 set a=a+10 LIMIT ROWS EXAMINED 0;
+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 'EXAMINED 0' at line 1
+update t4 set a=a+10 LIMIT 0 ROWS EXAMINED 0;
+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 'EXAMINED 0' at line 1
+drop table t4;
+drop table t1,t2,t1i,t2i;
+=========================================================================
+Test cases for bugs
+=========================================================================
+
+MDEV-115
+
+SET @@optimizer_switch='in_to_exists=on,outer_join_with_cache=on';
+CREATE TABLE t1 ( a VARCHAR(3) ) ENGINE=MyISAM;
+INSERT INTO t1 VALUES ('USA'),('CAN');
+CREATE TABLE t2 ( b INT );
+INSERT INTO t2 VALUES (3899),(3914),(3888);
+CREATE TABLE t3 ( c VARCHAR(33), d INT );
+INSERT INTO t3 VALUES ('USASpanish',8),('USATagalog',0),('USAVietnamese',0);
+EXPLAIN
+SELECT DISTINCT a AS field1 FROM t1, t2
+WHERE EXISTS (SELECT c FROM t3 LEFT JOIN t2 ON b = d)
+HAVING field1 > 'aaa' LIMIT ROWS EXAMINED 20;
+id select_type table type possible_keys key key_len ref rows Extra
+1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using temporary
+1 PRIMARY t2 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
+2 SUBQUERY t3 ALL NULL NULL NULL NULL 3
+2 SUBQUERY t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
+SELECT DISTINCT a AS field1 FROM t1, t2
+WHERE EXISTS (SELECT c FROM t3 LEFT JOIN t2 ON b = d)
+HAVING field1 > 'aaa' LIMIT ROWS EXAMINED 20;
+field1
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 20. The query result may be incomplete
+EXPLAIN
+SELECT DISTINCT a FROM t1, t2 HAVING a > ' ' LIMIT ROWS EXAMINED 14;
+id select_type table type possible_keys key key_len ref rows Extra
+1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using temporary
+1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
+SELECT DISTINCT a FROM t1, t2 HAVING a > ' ' LIMIT ROWS EXAMINED 14;
+a
+USA
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 14. The query result may be incomplete
+SELECT DISTINCT a FROM t1, t2 HAVING a > ' ' LIMIT ROWS EXAMINED 15;
+a
+USA
+CAN
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 15. The query result may be incomplete
+SELECT DISTINCT a FROM t1, t2 HAVING a > ' ' LIMIT ROWS EXAMINED 16;
+a
+USA
+CAN
+drop table t1,t2,t3;
+set @@optimizer_switch='default';
+
+MDEV-153
+
+CREATE TABLE t1 ( a TIME, b DATETIME, KEY(a), KEY(b) ) ENGINE=MyISAM;
+INSERT INTO t1 VALUES
+('21:22:34.025509', '2002-02-13 17:30:06.013935'),
+('10:50:38.059966', '2008-09-27 00:34:58.026613'),
+('00:21:38.058143', '2007-05-28 00:00:00');
+CREATE TABLE t2 ( c INT, d TIME, e DATETIME, f VARCHAR(1), KEY(c) ) ENGINE=MyISAM;
+INSERT INTO t2 VALUES
+(0, '11:03:22.062907', '2007-06-02 11:16:01.053212', 'a'),
+(0, '08:14:05.001407', '1900-01-01 00:00:00', 'm'),
+(5, '19:03:16.024974', '1900-01-01 00:00:00', 'f'),
+(1, '07:23:34.034234', '2000-11-26 05:01:11.054228', 'z'),
+(6, '12:29:32.019411', '2006-02-13 00:00:00', 'f'),
+(6, '06:07:10.010496', '2007-06-08 04:35:26.020373', 'a'),
+(7, '22:55:09.020772', '2005-04-27 00:00:00', 'i');
+EXPLAIN
+SELECT a AS field1, alias2.d AS field2, alias2.f AS field3, alias2.e AS field4, b AS field5
+FROM t1, t2 AS alias2, t2 AS alias3
+WHERE alias3.c IN ( SELECT 1 UNION SELECT 6 )
+GROUP BY field1, field2, field3, field4, field5
+LIMIT ROWS EXAMINED 120;
+id select_type table type possible_keys key key_len ref rows Extra
+1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using temporary; Using filesort
+1 PRIMARY alias2 ALL NULL NULL NULL NULL 7 Using join buffer (flat, BNL join)
+1 PRIMARY alias3 index NULL c 5 NULL 7 Using where; Using index; Using join buffer (incremental, BNL join)
+2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No tables used
+3 DEPENDENT UNION NULL NULL NULL NULL NULL NULL NULL No tables used
+NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL
+FLUSH STATUS;
+SELECT a AS field1, alias2.d AS field2, alias2.f AS field3, alias2.e AS field4, b AS field5
+FROM t1, t2 AS alias2, t2 AS alias3
+WHERE alias3.c IN ( SELECT 1 UNION SELECT 6 )
+GROUP BY field1, field2, field3, field4, field5
+LIMIT ROWS EXAMINED 120;
+field1 field2 field3 field4 field5
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 120. The query result may be incomplete
+SHOW STATUS LIKE 'Handler_read%';
+Variable_name Value
+Handler_read_first 1
+Handler_read_key 4
+Handler_read_last 0
+Handler_read_next 4
+Handler_read_prev 0
+Handler_read_retry 0
+Handler_read_rnd 0
+Handler_read_rnd_deleted 0
+Handler_read_rnd_next 46
+SHOW STATUS LIKE 'Handler_tmp%';
+Variable_name Value
+Handler_tmp_delete 0
+Handler_tmp_update 0
+Handler_tmp_write 66
+FLUSH STATUS;
+SELECT a AS field1, alias2.d AS field2, alias2.f AS field3, alias2.e AS field4, b AS field5
+FROM t1, t2 AS alias2, t2 AS alias3
+WHERE alias3.c IN ( SELECT 1 UNION SELECT 6 )
+GROUP BY field1, field2, field3, field4, field5
+LIMIT ROWS EXAMINED 124;
+field1 field2 field3 field4 field5
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 124. The query result may be incomplete
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 124. The query result may be incomplete
+SHOW STATUS LIKE 'Handler_read%';
+Variable_name Value
+Handler_read_first 1
+Handler_read_key 4
+Handler_read_last 0
+Handler_read_next 4
+Handler_read_prev 0
+Handler_read_retry 0
+Handler_read_rnd 0
+Handler_read_rnd_deleted 0
+Handler_read_rnd_next 48
+SHOW STATUS LIKE 'Handler_tmp%';
+Variable_name Value
+Handler_tmp_delete 0
+Handler_tmp_update 0
+Handler_tmp_write 70
+drop table t1, t2;
+
+MDEV-161 LIMIT_ROWS EXAMINED: query with the limit and NOT EXISTS, without GROUP BY or aggregate,
+returns rows, while the same query without the limit returns empty set
+
+CREATE TABLE t1 ( a INT, b INT );
+INSERT INTO t1 VALUES (3911,17),(3847,33),(3857,26);
+CREATE TABLE t2 ( c VARCHAR(16) );
+INSERT INTO t2 VALUES ('English'),('French'),('German');
+CREATE TABLE t3 ( d INT, e VARCHAR(32) );
+INSERT INTO t3 VALUES (3813,'United States'),(3814,'United States');
+SELECT * FROM t1 AS alias1, t2 AS alias2
+WHERE NOT EXISTS (
+SELECT * FROM t1 LEFT OUTER JOIN t3
+ON (d = a)
+WHERE b <= alias1.b OR e != alias2.c
+);
+a b c
+SELECT * FROM t1 AS alias1, t2 AS alias2
+WHERE NOT EXISTS (
+SELECT * FROM t1 LEFT OUTER JOIN t3
+ON (d = a)
+WHERE b <= alias1.b OR e != alias2.c
+) LIMIT ROWS EXAMINED 20;
+a b c
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 20. The query result may be incomplete
+drop table t1, t2, t3;
+
+MDEV-174: LIMIT ROWS EXAMINED: Assertion `0' failed in net_end_statement(THD*)
+with subquery in SELECT, constant table, aggregate function
+
+CREATE TABLE t1 ( a INT );
+CREATE TABLE t2 ( b INT, c INT, KEY(c) );
+INSERT INTO t2 VALUES
+(5, 0),(3, 4),(6, 1),
+(5, 8),(4, 9),(8, 1);
+SELECT (SELECT MAX(c) FROM t1, t2)
+FROM t2
+WHERE c = (SELECT MAX(b) FROM t2)
+LIMIT ROWS EXAMINED 3;
+(SELECT MAX(c) FROM t1, t2)
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 3. The query result may be incomplete
+drop table t1, t2;
+
+MDEV-178: LIMIT ROWS EXAMINED: Assertion `0' failed in net_end_statement(THD*) on the
+2nd PS execution, with DISTINCT, FROM subquery or view in SELECT, JOIN in nested subquery
+
+CREATE TABLE t1 ( a INT );
+INSERT INTO t1 VALUES (2),(3),(150);
+CREATE TABLE t2 ( b INT );
+INSERT INTO t2 VALUES (2),(17),(3),(6);
+CREATE VIEW v AS
+SELECT DISTINCT * FROM t1 WHERE a > (SELECT COUNT(*) FROM t1, t2 WHERE a = b);
+PREPARE ps FROM 'SELECT * FROM v LIMIT ROWS EXAMINED 21';
+EXECUTE ps;
+a
+3
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 21. The query result may be incomplete
+EXECUTE ps;
+a
+3
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 21. The query result may be incomplete
+drop view v;
+drop table t1, t2;
+#
+# 10.1 Test
+#
+# MDEV-17729: Assertion `! is_set() || m_can_overwrite_status'
+# failed in Diagnostics_area::set_error_status
+#
+set @old_mode= @@sql_mode;
+CREATE TABLE t1(id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,k INT, c CHAR(20));
+INSERT INTO t1 (k,c) VALUES(0,'0'), (0,'0'),(0,'0'),(0,'0'),(0,'0'),(0,'0'),(0,'0');
+SET @@sql_mode='STRICT_TRANS_TABLES';
+INSERT INTO t1 (c) SELECT k FROM t1 LIMIT ROWS EXAMINED 2;
+Warnings:
+Warning 1931 Query execution was interrupted. The query exceeded LIMIT ROWS EXAMINED 2. The query result may be incomplete
+SET @@sql_mode=@old_mode;
+DROP TABLE t1;
+#
+# MDEV-18117: Crash with Explain extended when using limit rows examined
+#
+create table t1 (c1 char(2));
+create table t2 (c2 char(2));
+insert into t1 values ('bb'), ('cc'), ('aa'), ('dd');
+insert into t2 values ('bb'), ('cc'), ('dd'), ('ff');
+explain extended
+select * from t1, t2 where c1 = c2 LIMIT ROWS EXAMINED 2;
+id select_type table type possible_keys key key_len ref rows filtered Extra
+1 SIMPLE t1 ALL NULL NULL NULL NULL 4 100.00
+1 SIMPLE t2 ALL NULL NULL NULL NULL 4 100.00 Using where; Using join buffer (flat, BNL join)
+Warnings:
+Note 1003 select `test`.`t1`.`c1` AS `c1`,`test`.`t2`.`c2` AS `c2` from `test`.`t1` join `test`.`t2` where `test`.`t2`.`c2` = `test`.`t1`.`c1`
+drop table t1,t2;
+# End of 10.4 tests