Allow automatic retry if the first query fails due to the
connection having already been lost. Hide packet warnings
in doMultiStatementQuery(), which can occur due to dropped
connections.
Make queryMulti() actually mark the transaction or session
as corrupt when needed,
Improve executeQuery() handling of empty $sqls arrays.
Pass the full SQL statement array to beginIfImplied().
Add re-connection tests for queryMulti().
Related documentation changes:
* Clarify affectedRows()/insertId() documentation.
* Update queryMulti() documentation to mention exceptions.
* Add comments about avoiding direct BEGIN/COMMIT/ROLLBACK.
These should be avoided in queryMulti() as well.
Bug: T322689
Change-Id: I51d213acccfacc48674dbcf08c177cd9872c6e15
PHPUnit 3.7.0 was the first version to support @requires extension. At
the time checkPHPExtension() was added in a7901801b4, MediaWiki
still supported PHPUnit 3.6.7.
MediaWiki now requires intl and xml, so I removed checks for those
extensions rather than converting them to annotations.
checkPHPExtension() is removed without deprecation; it does not appear
to have ever been used (and is not likely to be used) in MW extensions.
This is explicitly permitted under the stable interface policy. Even if
it were not, only tests are affected, and they are supposed to fail
anyway if hard deprecated code is used.
Change-Id: I45f9b4c0e120683103cead916f4d4ef58bd11530
Add Database::queryMulti(), which will execute an array of
queries as a batch with minimal roundtrips.
SQLite fallbacks to looping through each statement and
invoking doQuery().
Add QueryStatus class to reduce complexity in Database.
Rewrite doQuery() as doSingleStatementQuery().
Change-Id: I3d51083e36ab06fcc1d94558e51b38e106f71bb9
Rename canRecoverFromDisconnect() in order to better describe
its function. Make it use the transaction ID and query walltime
as arguments and return an ERR_* class constant instead of a bool.
Avoid retries of slow queries that yield lost connection errors.
Track session state errors caused by the loss of named locks or
temp tables (e.g. during connection loss). Such errors will prevent
further queries except for rollback() and flushSession(), which must
be issued to resolve the error.
Add flushPrimarySessions() methods to LBFactory/LoadBalancer
and use it in places where session state loss is meant to be
safely aknowledged.
Change-Id: I60532f86e629c83b357d4832d1963eca17752944
This reverts commit eed58f2f61.
Reason for revert: Blocking the train, going to revert the whole chain
Change-Id: I64f9e5a9dde106671783f958a686ca697182077b
Use the LoadBalancer id in flushPrimarySessions(), not the LBFactory one,
and use assertOwnership() to check $owner, similar to other methods.
In DatabaseMysqlBase::doFlushSession(), change RELEASE_ALL_LOCKS() query
to use RELEASE_LOCK(), since only newer MariaDB versions (>=10.5.2) support
it. No errors were thrown in the method since they are suppressed, but the
syntax error would cause the transaction to be placed in an error state.
Add assertion to testTransactionCallbackChains() that would otherwise fail.
Randomize lock names in lock() tests to avoid contention.
Bug: T292239
Bug: T303887
Follow-Up: ee3c65d541
Follow-Up: 4cac31de4e
Change-Id: I414d737028338cfd5369eee24576df4aa26a2f6f
Rename canRecoverFromDisconnect() in order to better describe
its function. Make it use the transaction ID and query walltime
as arguments and return an ERR_* class constant instead of a bool.
Avoid retries of slow queries that yield lost connection errors.
Add methods and class constants to track session state errors
caused by the loss of named locks or temp tables. Such errors can
be resolved by a "session flush" method.
Make assertQueryIsCurrentlyAllowed() better distinguish ROLLBACK
queries from ROLLBACK TO SAVEPOINT queries. For some scenarios,
only full tranasction ROLLBACK queries should be allowed.
Add flushSession() method to Database and flushPrimarySessions()
methods to LBFactory/LoadBalancer.
Also:
* Rename wasKnownStatementRollbackError() and make it take the
error number as an argument, similar to wasConnectionError().
Add mysql error codes for query timeouts since they only cause
statement rollbacks.
* Rename wasConnectionError() and mark it as protected. This is an
internal method with no outside callers.
* Rename wasQueryTimeout(), remove some HHVM-specific code, and
simplify the arguments.
* Make executeQuery() use a for loop for the query retry logic
to reduce code duplication.
* Move the error state setting logic in executeQueryAttempt() up
in order to reduce code duplication.
* Move the beginIfImplied() call in executeQueryAttempt() up to the
retry loop in executeQuery(). This narrows the executeQueryAttempt()
concerns to sending a single query and updating tracking fields.
* Make closeConnection() and doHandleSessionLossPreconnect() in
DatabaseSqlite more consistent with the base class by releasing named locks.
* Mark trxStatus() as @internal.
Bug: T281451
Bug: T293859
Change-Id: I200f90e413b8a725828745f81925b54985c72180
