SQL syntax extended with START TRANSACTION READ ONLY|READ WRITE

and SET TRANSACTION READ ONLT|READ WRITE
statements.


per-file comments:
  mysql-test/include/check-warnings.test
        READ ONLY transaction flag cleaned.
  mysql-test/r/commit.result
        result updated
  mysql-test/r/read_only.result
        result updated
  mysql-test/t/commit.test
        tests added.
  mysql-test/t/read_only.test
        tests added
  sql/lex.h
        ONLY symbol added.
  sql/sql_base.cc
        DBUG_RETURN added.
  sql/sql_parse.cc
        implementations added.
  sql/sql_yacc.yy
        SQL syntax extended.
  storage/perfschema/gen_pfs_lex_token
        changes forced by lex.h
  storage/perfschema/pfs_lex_token.h
        changes forced by lex.h

1 files changed, 37 insertions, 0 deletions

diff --git a/mysql-test/r/read_only.result b/mysql-test/r/read_only.result
index 1ffe2b86f70..3811c6c5487 100644
--- a/mysql-test/r/read_only.result
+++ b/mysql-test/r/read_only.result
@@ -157,3 +157,40 @@ delete from mysql.columns_priv where User like 'mysqltest_%';
 flush privileges;
 drop database mysqltest_db1;
 set global read_only= @start_read_only;
+#
+# WL#5968 Implement START TRANSACTION READ (WRITE|ONLY);
+#
+#
+# Test interaction with read_only system variable.
+DROP TABLE IF EXISTS t1;
+CREATE TABLE t1(a INT);
+INSERT INTO t1 VALUES (1), (2);
+CREATE USER user1;
+SET GLOBAL read_only= 1;
+# All allowed with super privilege
+START TRANSACTION;
+COMMIT;
+START TRANSACTION READ ONLY;
+COMMIT;
+START TRANSACTION READ WRITE;
+COMMIT;
+# We allow implicit RW transaction without super privilege
+# for compatibility reasons
+START TRANSACTION;
+# Check that table updates are still disallowed.
+INSERT INTO t1 VALUES (3);
+ERROR HY000: The MariaDB server is running with the --read-only option so it cannot execute this statement
+UPDATE t1 SET a= 1;
+ERROR HY000: The MariaDB server is running with the --read-only option so it cannot execute this statement
+DELETE FROM t1;
+ERROR HY000: The MariaDB server is running with the --read-only option so it cannot execute this statement
+COMMIT;
+START TRANSACTION READ ONLY;
+COMMIT;
+# Explicit RW trans is not allowed without super privilege
+START TRANSACTION READ WRITE;
+ERROR HY000: The MariaDB server is running with the --read-only option so it cannot execute this statement
+COMMIT;
+DROP USER user1;
+SET GLOBAL read_only= 0;
+DROP TABLE t1;