mirror of
https://github.com/MariaDB/server.git
synced 2025-11-03 20:36:16 +01:00
d20a96f9c1
In MariaDB, we have a confusing problem where: * The transaction_isolation option can be set in a configuration file, but it cannot be set dynamically. * The tx_isolation system variable can be set dynamically, but it cannot be set in a configuration file. Therefore, we have two different names for the same thing in different contexts. This is needlessly confusing, and it complicates the documentation. The same thing applys for transaction_read_only. MySQL 5.7 solved this problem by making them into system variables. https://dev.mysql.com/doc/relnotes/mysql/5.7/en/news-5-7-20.html This commit takes a similar approach by adding new system variables and marking the original ones as deprecated. This commit also resolves some legacy problems related to SET STATEMENT and transaction_isolation.
42 lines
1.1 KiB
Text
42 lines
1.1 KiB
Text
#
|
|
# WL#5968: Implement START TRANSACTION READ (WRITE|ONLY);
|
|
#
|
|
#
|
|
# Test9: The --transaction-read-only startup option.
|
|
# Check that the option was set by the .opt file.
|
|
SELECT @@transaction_read_only;
|
|
@@transaction_read_only
|
|
1
|
|
# Also for new connections.
|
|
connect con1, localhost, root;
|
|
SELECT @@transaction_read_only;
|
|
@@transaction_read_only
|
|
1
|
|
SET SESSION TRANSACTION READ WRITE;
|
|
SELECT @@transaction_read_only;
|
|
@@transaction_read_only
|
|
0
|
|
disconnect con1;
|
|
connection default;
|
|
SELECT @@transaction_read_only;
|
|
@@transaction_read_only
|
|
1
|
|
#
|
|
# Test 10: SET TRANSACTION / START TRANSACTION + implicit commit.
|
|
SET SESSION TRANSACTION READ WRITE;
|
|
SET TRANSACTION READ ONLY;
|
|
# Since DDL does implicit commit before starting, SET TRANSACTION
|
|
# will have no effect because the "next" transaction will already
|
|
# be over before the DDL statement starts.
|
|
CREATE TABLE t1 (a INT);
|
|
START TRANSACTION READ ONLY;
|
|
# The same happens with START TRANSACTION
|
|
DROP TABLE t1;
|
|
#
|
|
# Test 11: INSERT DELAYED
|
|
CREATE TABLE t1(a INT);
|
|
START TRANSACTION READ ONLY;
|
|
INSERT DELAYED INTO t1 VALUES (1);
|
|
ERROR 25006: Cannot execute statement in a READ ONLY transaction
|
|
COMMIT;
|
|
DROP TABLE t1;
|