Merge 10.1 into 10.2

mysql-test/suite/innodb/r/foreign_key.result

@@ -406,6 +406,20 @@ Opened_table_definitions	2
 Opened_tables	2
 drop function foo;
 drop table t2, t1;
+CREATE TABLE t1 (pk INT, a INT, PRIMARY KEY (pk)) ENGINE=InnoDB;
+XA START 'xid';
+INSERT INTO t1 VALUES (1,2);
+CREATE TABLE x AS SELECT * FROM t1;
+ERROR XAE07: XAER_RMFAIL: The command cannot be executed when global transaction is in the  ACTIVE state
+connect  con1,localhost,root,,test;
+SET foreign_key_checks= OFF, innodb_lock_wait_timeout= 1;
+ALTER TABLE t1 ADD FOREIGN KEY f (a) REFERENCES t1 (pk), LOCK=EXCLUSIVE;
+ERROR HY000: Lock wait timeout exceeded; try restarting transaction
+disconnect con1;
+connection default;
+XA END 'xid';
+XA ROLLBACK 'xid';
+DROP TABLE t1;
 # Start of 10.2 tests
 #
 # MDEV-13246 Stale rows despite ON DELETE CASCADE constraint

mysql-test/suite/innodb/t/foreign_key.test

@@ -407,6 +407,20 @@ show status like '%opened_tab%';
 drop function foo;
 drop table t2, t1;
 
+CREATE TABLE t1 (pk INT, a INT, PRIMARY KEY (pk)) ENGINE=InnoDB;
+XA START 'xid';
+INSERT INTO t1 VALUES (1,2);
+--error ER_XAER_RMFAIL
+CREATE TABLE x AS SELECT * FROM t1;
+--connect (con1,localhost,root,,test)
+SET foreign_key_checks= OFF, innodb_lock_wait_timeout= 1;
+--error ER_LOCK_WAIT_TIMEOUT
+ALTER TABLE t1 ADD FOREIGN KEY f (a) REFERENCES t1 (pk), LOCK=EXCLUSIVE;# Cleanup
+--disconnect con1
+--connection default
+XA END 'xid';
+XA ROLLBACK 'xid';
+DROP TABLE t1;
 #
 # End of 10.1 tests
 #

storage/innobase/handler/handler0alter.cc

@@ -5148,6 +5148,12 @@ err_exit:
 	trx_free_for_mysql(ctx->trx);
 	trx_commit_for_mysql(ctx->prebuilt->trx);
 
+	for (uint i = 0; i < ctx->num_to_add_fk; i++) {
+		if (ctx->add_fk[i]) {
+			dict_foreign_free(ctx->add_fk[i]);
+		}
+	}
+
 	delete ctx;
 	ha_alter_info->handler_ctx = NULL;
 

storage/innobase/include/sync0rw.h

@@ -2,7 +2,7 @@
 
 Copyright (c) 1995, 2016, Oracle and/or its affiliates. All Rights Reserved.
 Copyright (c) 2008, Google Inc.
-Copyright (c) 2017, 2019, MariaDB Corporation.
+Copyright (c) 2017, 2020, MariaDB Corporation.
 
 Portions of this file contain modifications contributed and copyrighted by
 Google, Inc. Those modifications are gratefully acknowledged and are described
@@ -577,12 +577,6 @@ struct rw_lock_t
 	/** number of granted SX locks. */
 	volatile ulint	sx_recursive;
 
-	/** This is TRUE if the writer field is RW_LOCK_X_WAIT; this field
-	is located far from the memory update hotspot fields which are at
-	the start of this struct, thus we can peek this field without
-	causing much memory bus traffic */
-	bool		writer_is_wait_ex;
-
 	/** The value is typically set to thread id of a writer thread making
 	normal rw_locks recursive. In case of asynchronous IO, when a non-zero
 	value of 'pass' is passed then we keep the lock non-recursive.

storage/xtradb/handler/handler0alter.cc

@@ -3388,6 +3388,12 @@ err_exit:
 	trx_free_for_mysql(ctx->trx);
 	trx_commit_for_mysql(ctx->prebuilt->trx);
 
+	for (uint i = 0; i < ctx->num_to_add_fk; i++) {
+		if (ctx->add_fk[i]) {
+			dict_foreign_free(ctx->add_fk[i]);
+		}
+	}
+
 	delete ctx;
 	ha_alter_info->handler_ctx = NULL;
 

storage/xtradb/include/sync0rw.h

@@ -2,6 +2,7 @@
 
 Copyright (c) 1995, 2016, Oracle and/or its affiliates. All Rights Reserved.
 Copyright (c) 2008, Google Inc.
+Copyright (c) 2020, MariaDB Corporation.
 
 Portions of this file contain modifications contributed and copyrighted by
 Google, Inc. Those modifications are gratefully acknowledged and are described
@@ -763,13 +764,6 @@ struct rw_lock_t {
         /* last s-lock file/line is not guaranteed to be correct */
 	const char*	last_s_file_name;/*!< File name where last s-locked */
 	const char*	last_x_file_name;/*!< File name where last x-locked */
-	ibool		writer_is_wait_ex;
-				/*!< This is TRUE if the writer field is
-				RW_LOCK_WAIT_EX; this field is located far
-				from the memory update hotspot fields which
-				are at the start of this struct, thus we can
-				peek this field without causing much memory
-				bus traffic */
 	unsigned	cline:14;	/*!< Line where created */
 	unsigned	last_s_line:14;	/*!< Line number where last time s-locked */
 	unsigned	last_x_line:14;	/*!< Line number where last time x-locked */