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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace Wikibase\TermStore\MediaWiki\Tests\Integration\PackagePrivate\Util;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use PHPUnit\Framework\TestCase;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Wikibase\TermStore\MediaWiki\PackagePrivate\Util\ReplicaMasterAwareRecordIdsAcquirer;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Wikimedia\Rdbms\IDatabase;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Wikimedia\Rdbms\DatabaseSqlite;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class ReplicaMasterAwareRecordIdsAcquirerTest extends TestCase { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	const TABLE_DDL_FILE_PATH = __DIR__ . '/ReplicaMasterAwareRecordIdsAcquirerTest_tableDDL.sql';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	const TABLE_NAME = 'replica_master_aware_record_ids_acquirer_test';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	const ID_COLUMN = 'id';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @var IDatabase $dbMaster  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	private $dbMaster;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @var IDatabase $dbReplica  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	private $dbReplica;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	public function setUp() { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$this->dbMaster = DatabaseSqlite::newStandaloneInstance( ':memory:' );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$this->dbMaster->sourceFile( self::TABLE_DDL_FILE_PATH );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$this->dbReplica = DatabaseSqlite::newStandaloneInstance( ':memory:' );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$this->dbReplica->sourceFile( self::TABLE_DDL_FILE_PATH );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	public function testWhenAllRecordsExistInReplica() { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$records = $this->getTestRecords();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$this->dbReplica->insert(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			self::TABLE_NAME,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$records  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$this->assertSameRecordsInDb( $records, $this->dbReplica );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$idsAcquirer = $this->getTestSubjectInstance();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$acquiredRecordsWithIds = $idsAcquirer->acquireIds( $records );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$this->assertNoRecordsInDb( $records, $this->dbMaster );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$this->assertSameRecordsInDb( $acquiredRecordsWithIds, $this->dbReplica );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	public function testWhenAllRecordsExistInMaster() { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$records = $this->getTestRecords();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$this->dbMaster->insert(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			self::TABLE_NAME,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$records  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$this->assertSameRecordsInDb( $records, $this->dbMaster );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$idsAcquirer = $this->getTestSubjectInstance();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$acquiredRecordsWithIds = $idsAcquirer->acquireIds( $records );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$this->assertNoRecordsInDb( $records, $this->dbReplica );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$this->assertSameRecordsInDb( $acquiredRecordsWithIds, $this->dbMaster );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	public function testWhenAllRecordsDoNotExistInReplicaOrMaster() { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$records = $this->getTestRecords();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$idsAcquirer = $this->getTestSubjectInstance();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$acquiredRecordsWithIds = $idsAcquirer->acquireIds( $records );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$this->assertNoRecordsInDb( $records, $this->dbReplica );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$this->assertSameRecordsInDb( $acquiredRecordsWithIds, $this->dbMaster );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	public function testWhenSomeRecordsDoNotExistInReplicaButExistInMaster() { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$records = $this->getTestRecords();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$recordsInReplica = [ $records[0], $records[1] ];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$recordsInMaster = [ $records[2] ];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$this->dbReplica->insert(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			self::TABLE_NAME,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$recordsInReplica  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$this->assertSameRecordsInDb( $recordsInReplica, $this->dbReplica );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$this->dbMaster->insert(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			self::TABLE_NAME,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$recordsInMaster  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$this->assertSameRecordsInDb( $recordsInMaster, $this->dbMaster );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$idsAcquirer = $this->getTestSubjectInstance();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$acquiredRecordsWithIds = $idsAcquirer->acquireIds( $records );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$this->assertSame(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			count( $acquiredRecordsWithIds ),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			count( $records )  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$this->assertSameRecordsInDb( [ $records[3] ], $this->dbMaster );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$this->assertNoRecordsInDb( $recordsInReplica, $this->dbMaster );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$this->assertNoRecordsInDb( $recordsInMaster, $this->dbReplica );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	private function assertNoRecordsInDb( array $records, IDatabase $db ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$recordsInDbCount = $db->selectRowCount(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			self::TABLE_NAME,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			'*',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$this->recordsToSelectConditions( $records, $db )  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$this->assertSame( 0, $recordsInDbCount );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                	private function assertSameRecordsInDb( array $records, IDatabase $db ) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                		$recordsInDbCount = $db->selectRowCount(  | 
            
            
                                                                        
                            
            
                                    
            
            
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                			self::TABLE_NAME,  | 
            
            
                                                                        
                            
            
                                    
            
            
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                			'*',  | 
            
            
                                                                        
                            
            
                                    
            
            
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                			$this->recordsToSelectConditions( $records, $db )  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		$this->assertCount( $recordsInDbCount, $records );  | 
            
            
                                                                        
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	private function recordsToSelectConditions( array $records, IDatabase $db ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$conditionsPairs = [];  | 
            
                            
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                		foreach ( $records as $record ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    129
                 | 
                                    
                                                     | 
                
                 | 
                			$conditionPairs[] = $db->makeList( $record, IDatabase::LIST_AND );  | 
            
                            
                    | 
                        
                     | 
                     | 
                     | 
                    
                                                                                                    
                        
                         
                                                                                        
                                                                                     
                     | 
                
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    130
                 | 
                                    
                                                     | 
                
                 | 
                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    131
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    132
                 | 
                                    
                                                     | 
                
                 | 
                		return $db->makeList( $conditionPairs, IDatabase::LIST_OR );  | 
            
                            
                    | 
                        
                     | 
                     | 
                     | 
                    
                                                                                                    
                        
                         
                                                                                        
                                                                                     
                     | 
                
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    133
                 | 
                                    
                                                     | 
                
                 | 
                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    134
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    135
                 | 
                                    
                                                     | 
                
                 | 
                	private function getTestSubjectInstance() { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    136
                 | 
                                    
                                                     | 
                
                 | 
                		return new ReplicaMasterAwareRecordIdsAcquirer(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    137
                 | 
                                    
                                                     | 
                
                 | 
                			$this->dbMaster,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    138
                 | 
                                    
                                                     | 
                
                 | 
                			$this->dbReplica,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    139
                 | 
                                    
                                                     | 
                
                 | 
                			self::TABLE_NAME,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    140
                 | 
                                    
                                                     | 
                
                 | 
                			self::ID_COLUMN  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    141
                 | 
                                    
                                                     | 
                
                 | 
                		);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    142
                 | 
                                    
                                                     | 
                
                 | 
                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    143
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    144
                 | 
                                    
                                                     | 
                
                 | 
                	private function getTestRecords() { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    145
                 | 
                                    
                                                     | 
                
                 | 
                		return [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    146
                 | 
                                    
                                                     | 
                
                 | 
                			[ 'column_value' => 'valueA1', 'column_id' => '1' ],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    147
                 | 
                                    
                                                     | 
                
                 | 
                			[ 'column_value' => 'valueA2', 'column_id' => '2' ],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    148
                 | 
                                    
                                                     | 
                
                 | 
                			[ 'column_value' => 'valueA3', 'column_id' => '3' ],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    149
                 | 
                                    
                                                     | 
                
                 | 
                			[ 'column_value' => 'valueA4', 'column_id' => '4' ]  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    150
                 | 
                                    
                                                     | 
                
                 | 
                		];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    151
                 | 
                                    
                                                     | 
                
                 | 
                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    152
                 | 
                                    
                                                     | 
                
                 | 
                }  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
                | 
                    153
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                        
            
                                    
            
            
                | 
                    154
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                        
This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVarassignment in line 1 and the$higherassignment in line 2 are dead. The first because$myVaris never used and the second because$higheris always overwritten for every possible time line.