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Title Object type File name Summary
FetchTest::testLegacyFetchColumn function core/tests/Drupal/KernelTests/Core/Database/FetchTest.php Confirms deprecation of StatementPrefetchIterator::fetchColumn().
FetchTest::testQueryFetchColumn function core/tests/Drupal/KernelTests/Core/Database/FetchTest.php Confirms that we can fetch a single column value.
FetchTest::testQueryFetchColumnOutOfRange function core/tests/Drupal/KernelTests/Core/Database/FetchTest.php Confirms that an out of range index throws an error.
StatementPrefetchIterator::fetchColumn function core/lib/Drupal/Core/Database/StatementPrefetchIterator.php

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