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Changing the position of the emptied variable #3997

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Changing the position of the emptied variable #3997

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4f51944
Changing the position of the emptied variable
dfrnks May 6, 2020
a711cce
correcting unit test and code correction
dfrnks May 6, 2020
4e54fce
Remove space
dfrnks May 6, 2020
90121e3
New unit test. test ArrayIterator
dfrnks May 7, 2020
6ebd9a1
New unit test. test ArrayIterator
dfrnks May 7, 2020
c7ba8bb
Change the unit test
dfrnks May 7, 2020
03937e3
CS fixed
dfrnks May 7, 2020
8f70206
/** @scrutinizer ignore-call */
dfrnks May 7, 2020
038b00d
Update tests/Doctrine/Tests/DBAL/Functional/ResultCacheTest.php
dfrnks May 8, 2020
039d351
Remove use ArrayIterator
dfrnks May 8, 2020
70ecd18
Change the return of executeCacheQuery
dfrnks May 8, 2020
40a452b
Fixed CS
dfrnks May 8, 2020
3cc7fe2
Add @throws DBALException
dfrnks May 8, 2020
0ca34b8
Remove @throws DBALException
dfrnks May 8, 2020
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4 changes: 2 additions & 2 deletions lib/Doctrine/DBAL/Cache/ResultCacheStatement.php
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Original file line number Diff line number Diff line change
Expand Up @@ -134,6 +134,8 @@ public function fetch($fetchMode = null, $cursorOrientation = PDO::FETCH_ORI_NEX

$row = $this->statement->fetch(FetchMode::ASSOCIATIVE);

$this->emptied = true;

if ($row) {
$this->data[] = $row;

Expand All @@ -158,8 +160,6 @@ public function fetch($fetchMode = null, $cursorOrientation = PDO::FETCH_ORI_NEX
throw new InvalidArgumentException('Invalid fetch-style given for caching result.');
}

$this->emptied = true;

return false;
}

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22 changes: 21 additions & 1 deletion tests/Doctrine/Tests/DBAL/Functional/ResultCacheTest.php
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Expand Up @@ -165,7 +165,7 @@ public function testDontFinishNoCache() : void

$this->hydrateStmt($stmt, FetchMode::NUMERIC);

self::assertCount(2, $this->sqlLogger->queries);
self::assertCount(1, $this->sqlLogger->queries);
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Wait, isn't this test supposed to have 2 queries executed?

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Not really, a second query he took from the cache

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It previously expected 2 queries in the test and I want to know what's the reason for this test. I'll need help from @beberlei, who implemented this test in #69 a long time ago.

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The test was incorrect because, just will save the query in $this->sqlLogger->queries when the query are execute in the database.

dbal/lib/Doctrine/DBAL/Connection.php

Lines 894 to 897 in 4c03ed8

$logger = $this->_config->getSQLLogger();
if ($logger) {
$logger->startQuery($query, $params, $types);
}

When the query are in the cache, they return before

dbal/lib/Doctrine/DBAL/Connection.php

Lines 886 to 897 in 4c03ed8

public function executeQuery($query, array $params = [], $types = [], ?QueryCacheProfile $qcp = null)
{
if ($qcp !== null) {
return $this->executeCacheQuery($query, $params, $types, $qcp);
}
$connection = $this->getWrappedConnection();
$logger = $this->_config->getSQLLogger();
if ($logger) {
$logger->startQuery($query, $params, $types);
}

The reason are the cache doesn't work before, when we use fetch

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I agree, which is why I approved if at first, but if there's another reason why @beberlei expected 2 in the past, I want to know and would like to be on the save side.

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This was recently changed in #4048. It's an improvement, not a bugfix, so this change shouldn't be made in 2.10.x..

}

public function testFetchAllAndFinishSavesCache() : void
Expand Down Expand Up @@ -194,6 +194,26 @@ public function testFetchAllColumn() : void
self::assertEquals([1], $stmt->fetchAll(FetchMode::COLUMN));
}

public function testGetIterator() : void
{
$query = $this->connection->getDatabasePlatform()
->getDummySelectSQL('1');

$qcp = new QueryCacheProfile(0, 0, new ArrayCache());

$stmt = $this->connection->executeCacheQuery($query, [], [], $qcp);
$stmt->/** @scrutinizer ignore-call */
getIterator();
$stmt->closeCursor();

$stmt = $this->connection->executeCacheQuery($query, [], [], $qcp);

$iterator = $stmt->/** @scrutinizer ignore-call */
getIterator();

self::assertCount(1, $iterator);
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This is not a valid behavior to expect. The fact that the iterator internally calls fetchAll() is a bug (see #2718) and shouldn't be relied upon to expect that the statement is cached just because an iterator over its results was instantiated.

}

/**
* @param array<int, array<int, int|string>> $expectedResult
*/
Expand Down