Merge branch '10.10' into 10.11

mysql-test/main/table_elim.result

@@ -1003,3 +1003,23 @@ a1	a2
 5	277
 NULL	278
 DROP TABLE t1, t2;
+#
+# MDEV-30007: SIGSEGV in st_select_lex_unit::is_derived_eliminated,
+# runtime error: member access within null pointer of type
+# 'struct TABLE' in st_select_lex_unit::is_derived_eliminated()
+#
+CREATE VIEW v AS SELECT 1 AS a;
+SELECT ROUND ((SELECT 1 FROM v)) FROM v GROUP BY ROUND ((SELECT 1 FROM v));
+ROUND ((SELECT 1 FROM v))
+1
+EXPLAIN
+SELECT ROUND ((SELECT 1 FROM v)) FROM v GROUP BY ROUND ((SELECT 1 FROM v));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	<derived4>	system	NULL	NULL	NULL	NULL	1	
+4	DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
+2	SUBQUERY	<derived5>	system	NULL	NULL	NULL	NULL	1	
+5	DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
+DROP VIEW v;
+#
+# End of 10.10 tests
+#

mysql-test/main/table_elim.test

@@ -783,4 +783,19 @@ SELECT t1.* FROM t1 LEFT JOIN
     GROUP BY t2.a1) dt
  ) dt2 ON dt2.a2 = t1.a2;
 
-DROP TABLE t1, t2;
\ No newline at end of file
+DROP TABLE t1, t2;
+
+--echo #
+--echo # MDEV-30007: SIGSEGV in st_select_lex_unit::is_derived_eliminated,
+--echo # runtime error: member access within null pointer of type
+--echo # 'struct TABLE' in st_select_lex_unit::is_derived_eliminated()
+--echo #
+CREATE VIEW v AS SELECT 1 AS a;
+SELECT ROUND ((SELECT 1 FROM v)) FROM v GROUP BY ROUND ((SELECT 1 FROM v));
+EXPLAIN
+SELECT ROUND ((SELECT 1 FROM v)) FROM v GROUP BY ROUND ((SELECT 1 FROM v));
+DROP VIEW v;
+
+--echo #
+--echo # End of 10.10 tests
+--echo #

sql/sql_lex.cc

@@ -11921,9 +11921,18 @@ bool SELECT_LEX_UNIT::explainable() const
                false;
 }
 
+/*
+  Determines whether the derived table was eliminated during
+  the call of eliminate_tables(JOIN *) made at the optimization stage
+  or completely optimized out (for such degenerate statements like
+  "SELECT 1", for example)
+*/
+
 bool SELECT_LEX_UNIT::is_derived_eliminated() const
 {
   if (!derived)
     return false;
+  if (!derived->table)
+    return true;
   return derived->table->map & outer_select()->join->eliminated_tables;
 }

storage/spider/ha_spider.cc

@@ -2055,7 +2055,6 @@ int ha_spider::index_first_internal(
       pt_clone_source_handler));
     pt_clone_source_handler->pt_clone_last_searcher = this;
   }
-  if (sql_is_empty(SPIDER_SQL_TYPE_SELECT_SQL))
   {
     /*
         spider_db_free_one_result_for_start_next(this);
@@ -2399,7 +2398,6 @@ int ha_spider::index_last_internal(
       pt_clone_source_handler));
     pt_clone_source_handler->pt_clone_last_searcher = this;
   }
-  if (sql_is_empty(SPIDER_SQL_TYPE_SELECT_SQL))
   {
     /*
         spider_db_free_one_result_for_start_next(this);

storage/spider/mysql-test/spider/r/partition_mrr.result

@@ -104,11 +104,47 @@ pkey
 21
 26
 27
+SELECT a.pkey FROM tbl_a a, tbl_b b WHERE a.pkey+0 = b.pkey+0 ORDER BY a.pkey;
+pkey
+0
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10
+11
+12
+13
+14
+15
+16
+17
+18
+19
+20
+21
+22
+23
+24
+25
+26
+27
+28
+29
 connection child2_1;
 SELECT argument FROM mysql.general_log WHERE command_type != 'Execute' AND argument LIKE '%select %';
 argument
 select `pkey` from `auto_test_remote`.`tbl_a` order by `pkey`
 select a.id,b.`pkey` from auto_test_remote.tmp_spider_bka_xxxx a,`auto_test_remote`.`tbl_b` b where a.c0 <=> b.`pkey`
+select `pkey` from `auto_test_remote`.`tbl_a` order by `pkey`
+select `pkey` from `auto_test_remote`.`tbl_b` order by `pkey`
+select `pkey` from `auto_test_remote`.`tbl_b` order by `pkey`
+select `pkey` from `auto_test_remote`.`tbl_b` order by `pkey`
 SELECT argument FROM mysql.general_log WHERE command_type != 'Execute' AND argument LIKE '%select %'
 SELECT pkey FROM tbl_a ORDER BY pkey ;
 SELECT pkey FROM tbl_b ORDER BY pkey;
@@ -139,6 +175,10 @@ SELECT argument FROM mysql.general_log WHERE command_type != 'Execute' AND argum
 argument
 select `pkey` from `auto_test_remote2`.`tbl_a` order by `pkey`
 select a.id,b.`pkey` from auto_test_remote2.tmp_spider_bka_xxxx a,`auto_test_remote2`.`tbl_b` b where a.c0 <=> b.`pkey`
+select `pkey` from `auto_test_remote2`.`tbl_a` order by `pkey`
+select `pkey` from `auto_test_remote2`.`tbl_b` order by `pkey`
+select `pkey` from `auto_test_remote2`.`tbl_b` order by `pkey`
+select `pkey` from `auto_test_remote2`.`tbl_b` order by `pkey`
 SELECT argument FROM mysql.general_log WHERE command_type != 'Execute' AND argument LIKE '%select %'
 SELECT pkey FROM tbl_a ORDER BY pkey ;
 SELECT pkey FROM tbl_b ORDER BY pkey;
@@ -169,6 +209,10 @@ SELECT argument FROM mysql.general_log WHERE command_type != 'Execute' AND argum
 argument
 select `pkey` from `auto_test_remote3`.`tbl_a` order by `pkey`
 select a.id,b.`pkey` from auto_test_remote3.tmp_spider_bka_xxxx a,`auto_test_remote3`.`tbl_b` b where a.c0 <=> b.`pkey`
+select `pkey` from `auto_test_remote3`.`tbl_a` order by `pkey`
+select `pkey` from `auto_test_remote3`.`tbl_b` order by `pkey`
+select `pkey` from `auto_test_remote3`.`tbl_b` order by `pkey`
+select `pkey` from `auto_test_remote3`.`tbl_b` order by `pkey`
 SELECT argument FROM mysql.general_log WHERE command_type != 'Execute' AND argument LIKE '%select %'
 SELECT pkey FROM tbl_a ORDER BY pkey ;
 SELECT pkey FROM tbl_b ORDER BY pkey;

storage/spider/mysql-test/spider/t/partition_mrr.test

@@ -169,6 +169,7 @@ if ($USE_CHILD_GROUP2)
 }
 --connection master_1
 SELECT a.pkey FROM tbl_a a, tbl_b b WHERE a.pkey = b.pkey;
+SELECT a.pkey FROM tbl_a a, tbl_b b WHERE a.pkey+0 = b.pkey+0 ORDER BY a.pkey; # MDEV-29947
 if ($USE_CHILD_GROUP2)
 {
   if (!$OUTPUT_CHILD_GROUP2)