Avoid implicit conversion to boolean

phpstan.neon.dist

@@ -88,5 +88,14 @@ parameters:
                 - %currentWorkingDirectory%/src/Driver/AbstractOracleDriver/EasyConnectString.php
                 - %currentWorkingDirectory%/src/Platforms/*Platform.php
                 - %currentWorkingDirectory%/src/Schema/*SchemaManager.php
+
+        # In some namespaces, we use array<string,mixed>, some elements of which are actually boolean
+        -
+            message: '~^Only booleans are allowed in .*, mixed given~'
+            paths:
+                - %currentWorkingDirectory%/src/Driver/*/Driver.php
+                - %currentWorkingDirectory%/src/Platforms/*Platform.php
+                - %currentWorkingDirectory%/src/Query/QueryBuilder.php
+                - %currentWorkingDirectory%/src/Schema/*SchemaManager.php
 includes:
     - vendor/phpstan/phpstan-strict-rules/rules.neon

src/Cache/ArrayStatement.php

@@ -32,7 +32,7 @@ class ArrayStatement implements IteratorAggregate, ResultStatement
     public function __construct(array $data)
     {
         $this->data = $data;
-        if (! count($data)) {
+        if (count($data) === 0) {
             return;
         }
 

src/Cache/ResultCacheStatement.php

@@ -82,7 +82,7 @@ class ResultCacheStatement implements IteratorAggregate, ResultStatement
         }
 
         $data = $this->resultCache->fetch($this->cacheKey);
-        if (! $data) {
+        if ($data === false) {
             $data = [];
         }
         $data[$this->realKey] = $this->data;
@@ -132,7 +132,7 @@ class ResultCacheStatement implements IteratorAggregate, ResultStatement
 
         $row = $this->statement->fetch(FetchMode::ASSOCIATIVE);
 
-        if ($row) {
+        if ($row !== false) {
             $this->data[] = $row;
 
             $fetchMode = $fetchMode ?? $this->defaultFetchMode;

src/Configuration.php

@@ -72,14 +72,14 @@ class Configuration
      *
      * @deprecated Use Configuration::setSchemaAssetsFilter() instead
      *
-     * @param string $filterExpression
+     * @param string|null $filterExpression
      *
      * @return void
      */
     public function setFilterSchemaAssetsExpression($filterExpression)
     {
         $this->_attributes['filterSchemaAssetsExpression'] = $filterExpression;
-        if ($filterExpression) {
+        if ($filterExpression !== null) {
             $this->_attributes['filterSchemaAssetsExpressionCallable'] = $this->buildSchemaAssetsFilterFromExpression($filterExpression);
         } else {
             $this->_attributes['filterSchemaAssetsExpressionCallable'] = null;

src/Connection.php

@@ -197,11 +197,11 @@ class Connection implements DriverConnection
         }
 
         // Create default config and event manager if none given
-        if (! $config) {
+        if ($config === null) {
             $config = new Configuration();
         }
 
-        if (! $eventManager) {
+        if ($eventManager === null) {
             $eventManager = new EventManager();
         }
 
@@ -884,16 +884,16 @@ class Connection implements DriverConnection
         $connection = $this->getWrappedConnection();
 
         $logger = $this->_config->getSQLLogger();
-        if ($logger) {
+        if ($logger !== null) {
             $logger->startQuery($query, $params, $types);
         }
 
         try {
-            if ($params) {
+            if (count($params) > 0) {
                 [$query, $params, $types] = SQLParserUtils::expandListParameters($query, $params, $types);
 
                 $stmt = $connection->prepare($query);
-                if ($types) {
+                if (count($types) > 0) {
                     $this->_bindTypedValues($stmt, $params, $types);
                     $stmt->execute();
                 } else {
@@ -908,7 +908,7 @@ class Connection implements DriverConnection
 
         $stmt->setFetchMode($this->defaultFetchMode);
 
-        if ($logger) {
+        if ($logger !== null) {
             $logger->stopQuery();
         }
 
@@ -993,7 +993,7 @@ class Connection implements DriverConnection
         $connection = $this->getWrappedConnection();
 
         $logger = $this->_config->getSQLLogger();
-        if ($logger) {
+        if ($logger !== null) {
             $logger->startQuery($sql);
         }
 
@@ -1005,7 +1005,7 @@ class Connection implements DriverConnection
 
         $statement->setFetchMode($this->defaultFetchMode);
 
-        if ($logger) {
+        if ($logger !== null) {
             $logger->stopQuery();
         }
 
@@ -1029,17 +1029,17 @@ class Connection implements DriverConnection
         $connection = $this->getWrappedConnection();
 
         $logger = $this->_config->getSQLLogger();
-        if ($logger) {
+        if ($logger !== null) {
             $logger->startQuery($query, $params, $types);
         }
 
         try {
-            if ($params) {
+            if (count($params) > 0) {
                 [$query, $params, $types] = SQLParserUtils::expandListParameters($query, $params, $types);
 
                 $stmt = $connection->prepare($query);
 
-                if ($types) {
+                if (count($types) > 0) {
                     $this->_bindTypedValues($stmt, $params, $types);
                     $stmt->execute();
                 } else {
@@ -1053,7 +1053,7 @@ class Connection implements DriverConnection
             throw DBALException::driverExceptionDuringQuery($this->_driver, $ex, $query, $this->resolveParams($params, $types));
         }
 
-        if ($logger) {
+        if ($logger !== null) {
             $logger->stopQuery();
         }
 
@@ -1068,7 +1068,7 @@ class Connection implements DriverConnection
         $connection = $this->getWrappedConnection();
 
         $logger = $this->_config->getSQLLogger();
-        if ($logger) {
+        if ($logger !== null) {
             $logger->startQuery($statement);
         }
 
@@ -1078,7 +1078,7 @@ class Connection implements DriverConnection
             throw DBALException::driverExceptionDuringQuery($this->_driver, $ex, $statement);
         }
 
-        if ($logger) {
+        if ($logger !== null) {
             $logger->stopQuery();
         }
 
@@ -1217,21 +1217,21 @@ class Connection implements DriverConnection
         $logger = $this->_config->getSQLLogger();
 
         if ($this->transactionNestingLevel === 1) {
-            if ($logger) {
+            if ($logger !== null) {
                 $logger->startQuery('"START TRANSACTION"');
             }
 
             $connection->beginTransaction();
 
-            if ($logger) {
+            if ($logger !== null) {
                 $logger->stopQuery();
             }
         } elseif ($this->nestTransactionsWithSavepoints) {
-            if ($logger) {
+            if ($logger !== null) {
                 $logger->startQuery('"SAVEPOINT"');
             }
             $this->createSavepoint($this->_getNestedTransactionSavePointName());
-            if ($logger) {
+            if ($logger !== null) {
                 $logger->stopQuery();
             }
         }
@@ -1261,21 +1261,21 @@ class Connection implements DriverConnection
         $logger = $this->_config->getSQLLogger();
 
         if ($this->transactionNestingLevel === 1) {
-            if ($logger) {
+            if ($logger !== null) {
                 $logger->startQuery('"COMMIT"');
             }
 
             $result = $connection->commit();
 
-            if ($logger) {
+            if ($logger !== null) {
                 $logger->stopQuery();
             }
         } elseif ($this->nestTransactionsWithSavepoints) {
-            if ($logger) {
+            if ($logger !== null) {
                 $logger->startQuery('"RELEASE SAVEPOINT"');
             }
             $this->releaseSavepoint($this->_getNestedTransactionSavePointName());
-            if ($logger) {
+            if ($logger !== null) {
                 $logger->stopQuery();
             }
         }
@@ -1327,13 +1327,13 @@ class Connection implements DriverConnection
         $logger = $this->_config->getSQLLogger();
 
         if ($this->transactionNestingLevel === 1) {
-            if ($logger) {
+            if ($logger !== null) {
                 $logger->startQuery('"ROLLBACK"');
             }
             $this->transactionNestingLevel = 0;
             $connection->rollBack();
             $this->isRollbackOnly = false;
-            if ($logger) {
+            if ($logger !== null) {
                 $logger->stopQuery();
             }
 
@@ -1341,12 +1341,12 @@ class Connection implements DriverConnection
                 $this->beginTransaction();
             }
         } elseif ($this->nestTransactionsWithSavepoints) {
-            if ($logger) {
+            if ($logger !== null) {
                 $logger->startQuery('"ROLLBACK TO SAVEPOINT"');
             }
             $this->rollbackSavepoint($this->_getNestedTransactionSavePointName());
             --$this->transactionNestingLevel;
-            if ($logger) {
+            if ($logger !== null) {
                 $logger->stopQuery();
             }
         } else {

src/Connections/MasterSlaveConnection.php

@@ -351,7 +351,7 @@ class MasterSlaveConnection extends Connection
         assert($this->_conn instanceof DriverConnection);
 
         $logger = $this->getConfiguration()->getSQLLogger();
-        if ($logger) {
+        if ($logger !== null) {
             $logger->startQuery($sql);
         }
 
@@ -359,7 +359,7 @@ class MasterSlaveConnection extends Connection
 
         $statement->setFetchMode($this->defaultFetchMode);
 
-        if ($logger) {
+        if ($logger !== null) {
             $logger->stopQuery();
         }
 

src/DBALException.php

@@ -11,6 +11,7 @@ use Exception;
 use Throwable;
 use function array_map;
 use function bin2hex;
+use function count;
 use function get_class;
 use function gettype;
 use function implode;
@@ -103,7 +104,7 @@ class DBALException extends Exception
      */
     public static function driverRequired($url = null)
     {
-        if ($url) {
+        if ($url !== null) {
             return new self(
                 sprintf(
                     "The options 'driver' or 'driverClass' are mandatory if a connection URL without scheme " .
@@ -138,7 +139,7 @@ class DBALException extends Exception
     public static function driverExceptionDuringQuery(Driver $driver, Throwable $driverEx, $sql, array $params = [])
     {
         $msg = "An exception occurred while executing '" . $sql . "'";
-        if ($params) {
+        if (count($params) > 0) {
             $msg .= ' with params ' . self::formatParameters($params);
         }
         $msg .= ":\n\n" . $driverEx->getMessage();

src/Driver/AbstractMySQLDriver.php

@@ -140,11 +140,11 @@ abstract class AbstractMySQLDriver implements ExceptionConverterDriver, VersionA
      */
     private function getOracleMysqlVersionNumber(string $versionString) : string
     {
-        if (! preg_match(
+        if (preg_match(
             '/^(?P<major>\d+)(?:\.(?P<minor>\d+)(?:\.(?P<patch>\d+))?)?/',
             $versionString,
             $versionParts
-        )) {
+        ) === 0) {
             throw DBALException::invalidPlatformVersionSpecified(
                 $versionString,
                 '<major_version>.<minor_version>.<patch_version>'
@@ -171,11 +171,11 @@ abstract class AbstractMySQLDriver implements ExceptionConverterDriver, VersionA
      */
     private function getMariaDbMysqlVersionNumber(string $versionString) : string
     {
-        if (! preg_match(
+        if (preg_match(
             '/^(?:5\.5\.5-)?(mariadb-)?(?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)/i',
             $versionString,
             $versionParts
-        )) {
+        ) === 0) {
             throw DBALException::invalidPlatformVersionSpecified(
                 $versionString,
                 '^(?:5\.5\.5-)?(mariadb-)?<major_version>.<minor_version>.<patch_version>'

src/Driver/AbstractPostgreSQLDriver.php

@@ -80,7 +80,7 @@ abstract class AbstractPostgreSQLDriver implements ExceptionConverterDriver, Ver
      */
     public function createDatabasePlatformForVersion($version)
     {
-        if (! preg_match('/^(?P<major>\d+)(?:\.(?P<minor>\d+)(?:\.(?P<patch>\d+))?)?/', $version, $versionParts)) {
+        if (preg_match('/^(?P<major>\d+)(?:\.(?P<minor>\d+)(?:\.(?P<patch>\d+))?)?/', $version, $versionParts) === 0) {
             throw DBALException::invalidPlatformVersionSpecified(
                 $version,
                 '<major_version>.<minor_version>.<patch_version>'

src/Driver/AbstractSQLAnywhereDriver.php

@@ -65,11 +65,11 @@ abstract class AbstractSQLAnywhereDriver implements ExceptionConverterDriver, Ve
      */
     public function createDatabasePlatformForVersion($version)
     {
-        if (! preg_match(
+        if (preg_match(
             '/^(?P<major>\d+)(?:\.(?P<minor>\d+)(?:\.(?P<patch>\d+)(?:\.(?P<build>\d+))?)?)?/',
             $version,
             $versionParts
-        )) {
+        ) === 0) {
             throw DBALException::invalidPlatformVersionSpecified(
                 $version,
                 '<major_version>.<minor_version>.<patch_version>.<build_version>'

src/Driver/IBMDB2/DB2Connection.php

@@ -81,7 +81,7 @@ class DB2Connection implements ServerInfoAwareConnection
     public function prepare(string $sql) : DriverStatement
     {
         $stmt = @db2_prepare($this->conn, $sql);
-        if (! $stmt) {
+        if ($stmt === false) {
             throw new DB2Exception(db2_stmt_errormsg());
         }
 

src/Driver/OCI8/OCI8Connection.php

@@ -80,7 +80,7 @@ class OCI8Connection implements Connection, ServerInfoAwareConnection
             throw OCI8Exception::fromErrorInfo(oci_error($this->dbh));
         }
 
-        if (! preg_match('/\s+(\d+\.\d+\.\d+\.\d+\.\d+)\s+/', $version, $matches)) {
+        if (preg_match('/\s+(\d+\.\d+\.\d+\.\d+\.\d+)\s+/', $version, $matches) === 0) {
             throw new UnexpectedValueException(
                 sprintf(
                     'Unexpected database version string "%s". Cannot parse an appropriate version number from it. ' .

src/Driver/OCI8/OCI8Statement.php

@@ -191,7 +191,7 @@ class OCI8Statement implements IteratorAggregate, Statement
     ) {
         $token = self::findToken($statement, $tokenOffset, '/[?\'"]/');
 
-        if (! $token) {
+        if ($token === null) {
             return false;
         }
 
@@ -233,7 +233,7 @@ class OCI8Statement implements IteratorAggregate, Statement
             '/' . preg_quote($currentLiteralDelimiter, '/') . '/'
         );
 
-        if (! $token) {
+        if ($token === null) {
             return false;
         }
 
@@ -255,7 +255,7 @@ class OCI8Statement implements IteratorAggregate, Statement
      */
     private static function findToken($statement, &$offset, $regex)
     {
-        if (preg_match($regex, $statement, $matches, PREG_OFFSET_CAPTURE, $offset)) {
+        if (preg_match($regex, $statement, $matches, PREG_OFFSET_CAPTURE, $offset) === 1) {
             $offset = $matches[0][1];
 
             return $matches[0][0];
@@ -387,9 +387,8 @@ class OCI8Statement implements IteratorAggregate, Statement
      */
     public function execute($params = null)
     {
-        if ($params) {
+        if ($params !== null) {
             $hasZeroIndex = array_key_exists(0, $params);
-
             foreach ($params as $key => $val) {
                 if ($hasZeroIndex && is_int($key)) {
                     $this->bindValue($key + 1, $val);

src/Driver/SQLAnywhere/SQLAnywhereException.php

@@ -27,14 +27,14 @@ class SQLAnywhereException extends AbstractDriverException
      */
     public static function fromSQLAnywhereError($conn = null, $stmt = null)
     {
-        $state   = $conn ? sasql_sqlstate($conn) : sasql_sqlstate();
-        $code    = null;
+        $state   = $conn !== null ? sasql_sqlstate($conn) : sasql_sqlstate();
+        $code    = 0;
         $message = null;
 
         /**
          * Try retrieving the last error from statement resource if given
          */
-        if ($stmt) {
+        if ($stmt !== null) {
             $code    = sasql_stmt_errno($stmt);
             $message = sasql_stmt_error($stmt);
         }
@@ -47,7 +47,7 @@ class SQLAnywhereException extends AbstractDriverException
          * it from the connection resource even though it occurred during
          * a prepared statement.
          */
-        if ($conn && ! $code) {
+        if ($conn !== null && $code === 0) {
             $code    = sasql_errorcode($conn);
             $message = sasql_error($conn);
         }
@@ -57,7 +57,7 @@ class SQLAnywhereException extends AbstractDriverException
          * or the last error could not be retrieved from the given
          * connection / statement resource.
          */
-        if (! $conn || ! $code) {
+        if ($conn === null || $code === 0) {
             $code    = sasql_errorcode();
             $message = sasql_error();
         }

src/Driver/SQLAnywhere/SQLAnywhereStatement.php

@@ -14,7 +14,6 @@ use const SASQL_BOTH;
 use function array_key_exists;
 use function count;
 use function gettype;
-use function is_array;
 use function is_int;
 use function is_object;
 use function is_resource;
@@ -171,7 +170,7 @@ class SQLAnywhereStatement implements IteratorAggregate, Statement
      */
     public function execute($params = null)
     {
-        if (is_array($params)) {
+        if ($params !== null) {
             $hasZeroIndex = array_key_exists(0, $params);
 
             foreach ($params as $key => $val) {

src/Driver/SQLSrv/SQLSrvConnection.php

@@ -184,7 +184,7 @@ class SQLSrvConnection implements ServerInfoAwareConnection
     public function errorCode()
     {
         $errors = sqlsrv_errors(SQLSRV_ERR_ERRORS);
-        if ($errors) {
+        if ($errors !== null) {
             return $errors[0]['code'];
         }
 

src/Driver/SQLSrv/SQLSrvException.php

@@ -34,7 +34,7 @@ class SQLSrvException extends AbstractDriverException
             $errorCode = $error['code'];
         }
 
-        if (! $message) {
+        if ($message === '') {
             $message = 'SQL Server error occurred but no error message was retrieved from driver.';
         }
 

src/Driver/SQLSrv/SQLSrvStatement.php

@@ -224,7 +224,7 @@ class SQLSrvStatement implements IteratorAggregate, Statement
     public function errorCode()
     {
         $errors = sqlsrv_errors(SQLSRV_ERR_ERRORS);
-        if ($errors) {
+        if ($errors !== null) {
             return $errors[0]['code'];
         }
 
@@ -244,9 +244,8 @@ class SQLSrvStatement implements IteratorAggregate, Statement
      */
     public function execute($params = null)
     {
-        if ($params) {
+        if ($params !== null) {
             $hasZeroIndex = array_key_exists(0, $params);
-
             foreach ($params as $key => $val) {
                 if ($hasZeroIndex && is_int($key)) {
                     $this->bindValue($key + 1, $val);
@@ -256,7 +255,7 @@ class SQLSrvStatement implements IteratorAggregate, Statement
             }
         }
 
-        if (! $this->stmt) {
+        if ($this->stmt === null) {
             $this->stmt = $this->prepare();
         }
 
@@ -264,7 +263,7 @@ class SQLSrvStatement implements IteratorAggregate, Statement
             throw SQLSrvException::fromSqlSrvErrors();
         }
 
-        if ($this->lastInsertId) {
+        if ($this->lastInsertId !== null) {
             sqlsrv_next_result($this->stmt);
             sqlsrv_fetch($this->stmt);
             $this->lastInsertId->setId(sqlsrv_get_field($this->stmt, 0));
@@ -313,7 +312,7 @@ class SQLSrvStatement implements IteratorAggregate, Statement
 
         $stmt = sqlsrv_prepare($this->conn, $this->sql, $params);
 
-        if (! $stmt) {
+        if ($stmt === false) {
             throw SQLSrvException::fromSqlSrvErrors();
         }
 

src/DriverManager.php

@@ -124,10 +124,10 @@ final class DriverManager
         ?EventManager $eventManager = null
     ) : Connection {
         // create default config and event manager, if not set
-        if (! $config) {
+        if ($config === null) {
             $config = new Configuration();
         }
-        if (! $eventManager) {
+        if ($eventManager === null) {
             $eventManager = new EventManager();
         }
 

src/Event/Listeners/MysqlSessionInit.php

@@ -44,8 +44,13 @@ class MysqlSessionInit implements EventSubscriber
      */
     public function postConnect(ConnectionEventArgs $args)
     {
-        $collation = $this->collation ? ' COLLATE ' . $this->collation : '';
-        $args->getConnection()->executeUpdate('SET NAMES ' . $this->charset . $collation);
+        $statement = 'SET NAMES ' . $this->charset;
+
+        if ($this->collation !== false) {
+            $statement .= ' COLLATE ' . $this->collation;
+        }
+
+        $args->getConnection()->executeUpdate($statement);
     }
 
     /**

src/Event/Listeners/OracleSessionInit.php

@@ -45,7 +45,7 @@ class OracleSessionInit implements EventSubscriber
      */
     public function postConnect(ConnectionEventArgs $args)
     {
-        if (! count($this->_defaultSessionVars)) {
+        if (count($this->_defaultSessionVars) === 0) {
             return;
         }
 

src/Platforms/AbstractPlatform.php

@@ -814,7 +814,7 @@ abstract class AbstractPlatform
             $expression .= $char . ' ';
         }
 
-        if ($mode || $char !== false) {
+        if ($mode !== TrimMode::UNSPECIFIED || $char !== false) {
             $expression .= 'FROM ';
         }
 
@@ -2247,19 +2247,18 @@ abstract class AbstractPlatform
         } else {
             $default = $this->getDefaultValueDeclarationSQL($field);
 
-            $charset = isset($field['charset']) && $field['charset'] ?
+            $charset = ! empty($field['charset']) ?
                 ' ' . $this->getColumnCharsetDeclarationSQL($field['charset']) : '';
 
-            $collation = isset($field['collation']) && $field['collation'] ?
+            $collation = ! empty($field['collation']) ?
                 ' ' . $this->getColumnCollationDeclarationSQL($field['collation']) : '';
 
-            $notnull = isset($field['notnull']) && $field['notnull'] ? ' NOT NULL' : '';
+            $notnull = ! empty($field['notnull']) ? ' NOT NULL' : '';
 
-            $unique = isset($field['unique']) && $field['unique'] ?
+            $unique = ! empty($field['unique']) ?
                 ' ' . $this->getUniqueFieldDeclarationSQL() : '';
 
-            $check = isset($field['check']) && $field['check'] ?
-                ' ' . $field['check'] : '';
+            $check = ! empty($field['check']) ? ' ' . $field['check'] : '';
 
             $typeDecl  = $field['type']->getSQLDeclaration($field, $this);
             $columnDef = $typeDecl . $charset . $default . $notnull . $unique . $check . $collation;
@@ -2557,7 +2556,7 @@ abstract class AbstractPlatform
     public function getForeignKeyBaseDeclarationSQL(ForeignKeyConstraint $foreignKey)
     {
         $sql = '';
-        if (strlen($foreignKey->getName())) {
+        if (strlen($foreignKey->getName()) > 0) {
             $sql .= 'CONSTRAINT ' . $foreignKey->getQuotedName($this) . ' ';
         }
         $sql .= 'FOREIGN KEY (';
@@ -3560,7 +3559,7 @@ abstract class AbstractPlatform
     final public function getReservedKeywordsList()
     {
         // Check for an existing instantiation of the keywords class.
-        if ($this->_keywords) {
+        if ($this->_keywords !== null) {
             return $this->_keywords;
         }
 

src/Platforms/DB2Platform.php

@@ -111,8 +111,8 @@ class DB2Platform extends AbstractPlatform
      */
     protected function getVarcharTypeDeclarationSQLSnippet($length, $fixed)
     {
-        return $fixed ? ($length ? 'CHAR(' . $length . ')' : 'CHAR(254)')
-                : ($length ? 'VARCHAR(' . $length . ')' : 'VARCHAR(255)');
+        return $fixed ? ($length > 0 ? 'CHAR(' . $length . ')' : 'CHAR(254)')
+                : ($length > 0 ? 'VARCHAR(' . $length . ')' : 'VARCHAR(255)');
     }
 
     /**
@@ -664,7 +664,7 @@ class DB2Platform extends AbstractPlatform
 
         $alterClause = 'ALTER COLUMN ' . $columnDiff->column->getQuotedName($this);
 
-        if ($column['columnDefinition']) {
+        if ($column['columnDefinition'] !== null) {
             return [$alterClause . ' ' . $column['columnDefinition']];
         }
 
@@ -687,7 +687,7 @@ class DB2Platform extends AbstractPlatform
             if (isset($column['default'])) {
                 $defaultClause = $this->getDefaultValueDeclarationSQL($column);
 
-                if ($defaultClause) {
+                if ($defaultClause !== '') {
                     $clauses[] = $alterClause . ' SET' . $defaultClause;
                 }
             } else {
@@ -753,7 +753,7 @@ class DB2Platform extends AbstractPlatform
             return '';
         }
 
-        if (isset($field['version']) && $field['version']) {
+        if (! empty($field['version'])) {
             if ((string) $field['type'] !== 'DateTime') {
                 $field['default'] = '1';
             }

src/Platforms/Keywords/ReservedKeywordsValidator.php

@@ -9,6 +9,7 @@ use Doctrine\DBAL\Schema\Schema;
 use Doctrine\DBAL\Schema\Sequence;
 use Doctrine\DBAL\Schema\Table;
 use Doctrine\DBAL\Schema\Visitor\Visitor;
+use function count;
 use function implode;
 use function str_replace;
 
@@ -67,7 +68,7 @@ class ReservedKeywordsValidator implements Visitor
      */
     private function addViolation($asset, $violatedPlatforms)
     {
-        if (! $violatedPlatforms) {
+        if (count($violatedPlatforms) === 0) {
             return;
         }
 

src/Platforms/MySqlPlatform.php

@@ -150,7 +150,7 @@ class MySqlPlatform extends AbstractPlatform
      */
     public function getListTableIndexesSQL($table, $currentDatabase = null)
     {
-        if ($currentDatabase) {
+        if ($currentDatabase !== null) {
             $currentDatabase = $this->quoteStringLiteral($currentDatabase);
             $table           = $this->quoteStringLiteral($table);
 
@@ -224,8 +224,8 @@ class MySqlPlatform extends AbstractPlatform
      */
     protected function getVarcharTypeDeclarationSQLSnippet($length, $fixed)
     {
-        return $fixed ? ($length ? 'CHAR(' . $length . ')' : 'CHAR(255)')
-                : ($length ? 'VARCHAR(' . $length . ')' : 'VARCHAR(255)');
+        return $fixed ? ($length > 0 ? 'CHAR(' . $length . ')' : 'CHAR(255)')
+                : ($length > 0 ? 'VARCHAR(' . $length . ')' : 'VARCHAR(255)');
     }
 
     /**
@@ -372,7 +372,7 @@ class MySqlPlatform extends AbstractPlatform
     {
         $table = $this->quoteStringLiteral($table);
 
-        if ($database) {
+        if ($database !== null) {
             $database = $this->quoteStringLiteral($database);
         } else {
             $database = 'DATABASE()';
@@ -394,7 +394,7 @@ FROM information_schema.TABLES
 WHERE TABLE_TYPE = 'BASE TABLE' AND TABLE_SCHEMA = %s AND TABLE_NAME = %s
 SQL
             ,
-            $database ? $this->quoteStringLiteral($database) : 'DATABASE()',
+            $database !== null ? $this->quoteStringLiteral($database) : 'DATABASE()',
             $this->quoteStringLiteral($table)
         );
     }

src/Platforms/OraclePlatform.php

@@ -43,7 +43,7 @@ class OraclePlatform extends AbstractPlatform
      */
     public static function assertValidIdentifier($identifier)
     {
-        if (! preg_match('(^(([a-zA-Z]{1}[a-zA-Z0-9_$#]{0,})|("[^"]+"))$)', $identifier)) {
+        if (preg_match('(^(([a-zA-Z]{1}[a-zA-Z0-9_$#]{0,})|("[^"]+"))$)', $identifier) === 0) {
             throw new DBALException('Invalid Oracle identifier');
         }
     }
@@ -329,8 +329,8 @@ class OraclePlatform extends AbstractPlatform
      */
     protected function getVarcharTypeDeclarationSQLSnippet($length, $fixed)
     {
-        return $fixed ? ($length ? 'CHAR(' . $length . ')' : 'CHAR(2000)')
-                : ($length ? 'VARCHAR2(' . $length . ')' : 'VARCHAR2(4000)');
+        return $fixed ? ($length > 0 ? 'CHAR(' . $length . ')' : 'CHAR(2000)')
+                : ($length > 0 ? 'VARCHAR2(' . $length . ')' : 'VARCHAR2(4000)');
     }
 
     /**
@@ -725,13 +725,17 @@ SQL
      */
     public function getAdvancedForeignKeyOptionsSQL(ForeignKeyConstraint $foreignKey)
     {
-        $referentialAction = null;
+        $referentialAction = '';
 
         if ($foreignKey->hasOption('onDelete')) {
             $referentialAction = $this->getForeignKeyReferentialActionSQL($foreignKey->getOption('onDelete'));
         }
 
-        return $referentialAction ? ' ON DELETE ' . $referentialAction : '';
+        if ($referentialAction !== '') {
+            return ' ON DELETE ' . $referentialAction;
+        }
+
+        return '';
     }
 
     /**
@@ -785,7 +789,7 @@ SQL
             $fields[] = $this->getColumnDeclarationSQL($column->getQuotedName($this), $column->toArray());
             $comment  = $this->getColumnComment($column);
 
-            if (! $comment) {
+            if ($comment === null || $comment === '') {
                 continue;
             }
 
@@ -796,7 +800,7 @@ SQL
             );
         }
 
-        if (count($fields)) {
+        if (count($fields) > 0) {
             $sql[] = 'ALTER TABLE ' . $diff->getName($this)->getQuotedName($this) . ' ADD (' . implode(', ', $fields) . ')';
         }
 
@@ -844,7 +848,7 @@ SQL
             );
         }
 
-        if (count($fields)) {
+        if (count($fields) > 0) {
             $sql[] = 'ALTER TABLE ' . $diff->getName($this)->getQuotedName($this) . ' MODIFY (' . implode(', ', $fields) . ')';
         }
 
@@ -868,7 +872,7 @@ SQL
             $fields[] = $column->getQuotedName($this);
         }
 
-        if (count($fields)) {
+        if (count($fields) > 0) {
             $sql[] = 'ALTER TABLE ' . $diff->getName($this)->getQuotedName($this) . ' DROP (' . implode(', ', $fields) . ')';
         }
 
@@ -913,10 +917,10 @@ SQL
                 $notnull = $field['notnull'] ? ' NOT NULL' : ' NULL';
             }
 
-            $unique = isset($field['unique']) && $field['unique'] ?
+            $unique = ! empty($field['unique']) ?
                 ' ' . $this->getUniqueFieldDeclarationSQL() : '';
 
-            $check = isset($field['check']) && $field['check'] ?
+            $check = ! empty($field['check']) ?
                 ' ' . $field['check'] : '';
 
             $typeDecl  = $field['type']->getSQLDeclaration($field, $this);
@@ -999,8 +1003,8 @@ SQL
             return $query;
         }
 
-        if (preg_match('/^\s*SELECT/i', $query)) {
-            if (! preg_match('/\sFROM\s/i', $query)) {
+        if (preg_match('/^\s*SELECT/i', $query) === 1) {
+            if (preg_match('/\sFROM\s/i', $query) === 0) {
                 $query .= ' FROM dual';
             }
 

src/Platforms/PostgreSQL94Platform.php

@@ -662,7 +662,7 @@ SQL
 
         $fromColumn = $columnDiff->fromColumn instanceof Column ? $columnDiff->fromColumn : null;
 
-        if ($fromColumn) {
+        if ($fromColumn !== null) {
             $fromColumnType = $fromColumn->getType();
 
             if (! $fromColumnType instanceof BinaryType && ! $fromColumnType instanceof BlobType) {
@@ -1047,8 +1047,8 @@ SQL
      */
     protected function getVarcharTypeDeclarationSQLSnippet($length, $fixed)
     {
-        return $fixed ? ($length ? 'CHAR(' . $length . ')' : 'CHAR(255)')
-            : ($length ? 'VARCHAR(' . $length . ')' : 'VARCHAR(255)');
+        return $fixed ? ($length > 0 ? 'CHAR(' . $length . ')' : 'CHAR(255)')
+            : ($length > 0 ? 'VARCHAR(' . $length . ')' : 'VARCHAR(255)');
     }
 
     /**
@@ -1277,7 +1277,7 @@ SQL
      */
     private function typeChangeBreaksDefaultValue(ColumnDiff $columnDiff) : bool
     {
-        if (! $columnDiff->fromColumn) {
+        if ($columnDiff->fromColumn === null) {
             return $columnDiff->hasChanged('type');
         }
 
@@ -1296,7 +1296,7 @@ SQL
 
     private function getOldColumnComment(ColumnDiff $columnDiff) : ?string
     {
-        return $columnDiff->fromColumn ? $this->getColumnComment($columnDiff->fromColumn) : null;
+        return $columnDiff->fromColumn !== null ? $this->getColumnComment($columnDiff->fromColumn) : null;
     }
 
     public function getListTableMetadataSQL(string $table, ?string $schema = null) : string

src/Platforms/SQLAnywhere16Platform.php

@@ -1132,7 +1132,7 @@ SQL
      */
     public function getTrimExpression($str, $pos = TrimMode::UNSPECIFIED, $char = false)
     {
-        if (! $char) {
+        if ($char === false) {
             switch ($pos) {
                 case TrimMode::LEADING:
                     return $this->getLtrimExpression($str);
@@ -1389,7 +1389,7 @@ SQL
             return $query;
         }
 
-        if (! preg_match('/^\s*(SELECT\s+(DISTINCT\s+)?)(.*)/i', $query, $matches)) {
+        if (preg_match('/^\s*(SELECT\s+(DISTINCT\s+)?)(.*)/i', $query, $matches) === 0) {
             return $query;
         }
 
@@ -1543,8 +1543,8 @@ SQL
     protected function getVarcharTypeDeclarationSQLSnippet($length, $fixed)
     {
         return $fixed
-            ? ($length ? 'CHAR(' . $length . ')' : 'CHAR(' . $this->getVarcharDefaultLength() . ')')
-            : ($length ? 'VARCHAR(' . $length . ')' : 'VARCHAR(' . $this->getVarcharDefaultLength() . ')');
+            ? ($length > 0 ? 'CHAR(' . $length . ')' : 'CHAR(' . $this->getVarcharDefaultLength() . ')')
+            : ($length > 0 ? 'VARCHAR(' . $length . ')' : 'VARCHAR(' . $this->getVarcharDefaultLength() . ')');
     }
 
     /**

src/Platforms/SQLServer2012Platform.php

@@ -316,7 +316,7 @@ SQL
         // @todo does other code breaks because of this?
         // force primary keys to be not null
         foreach ($columns as &$column) {
-            if (isset($column['primary']) && $column['primary']) {
+            if (! empty($column['primary'])) {
                 $column['notnull'] = true;
             }
 
@@ -1123,7 +1123,7 @@ SQL
      */
     public function getTrimExpression($str, $pos = TrimMode::UNSPECIFIED, $char = false)
     {
-        if (! $char) {
+        if ($char === false) {
             switch ($pos) {
                 case TrimMode::LEADING:
                     $trimFn = 'LTRIM';
@@ -1261,7 +1261,9 @@ SQL
      */
     protected function getVarcharTypeDeclarationSQLSnippet($length, $fixed)
     {
-        return $fixed ? ($length ? 'NCHAR(' . $length . ')' : 'CHAR(255)') : ($length ? 'NVARCHAR(' . $length . ')' : 'NVARCHAR(255)');
+        return $fixed
+            ? ($length > 0 ? 'NCHAR(' . $length . ')' : 'CHAR(255)')
+            : ($length > 0 ? 'NVARCHAR(' . $length . ')' : 'NVARCHAR(255)');
     }
 
     /**
@@ -1352,9 +1354,9 @@ SQL
         }
 
         if ($orderByPos === false
-            || substr_count($query, '(', $orderByPos) - substr_count($query, ')', $orderByPos)
+            || substr_count($query, '(', $orderByPos) !== substr_count($query, ')', $orderByPos)
         ) {
-            if (preg_match('/^SELECT\s+DISTINCT/im', $query)) {
+            if (preg_match('/^SELECT\s+DISTINCT/im', $query) > 0) {
                 // SQL Server won't let us order by a non-selected column in a DISTINCT query,
                 // so we have to do this madness. This says, order by the first column in the
                 // result. SQL Server's docs say that a nonordered query's result order is non-
@@ -1399,10 +1401,10 @@ SQL
                     continue;
                 }
 
-                $item[$key] = $value ? 1 : 0;
+                $item[$key] = (int) (bool) $value;
             }
         } elseif (is_bool($item) || is_numeric($item)) {
-            $item = $item ? 1 : 0;
+            $item = (int) (bool) $item;
         }
 
         return $item;
@@ -1611,15 +1613,15 @@ SQL
         if (isset($field['columnDefinition'])) {
             $columnDef = $this->getCustomTypeDeclarationSQL($field);
         } else {
-            $collation = isset($field['collation']) && $field['collation'] ?
+            $collation = ! empty($field['collation']) ?
                 ' ' . $this->getColumnCollationDeclarationSQL($field['collation']) : '';
 
-            $notnull = isset($field['notnull']) && $field['notnull'] ? ' NOT NULL' : '';
+            $notnull = ! empty($field['notnull']) ? ' NOT NULL' : '';
 
-            $unique = isset($field['unique']) && $field['unique'] ?
+            $unique = ! empty($field['unique']) ?
                 ' ' . $this->getUniqueFieldDeclarationSQL() : '';
 
-            $check = isset($field['check']) && $field['check'] ?
+            $check = ! empty($field['check']) ?
                 ' ' . $field['check'] : '';
 
             $typeDecl  = $field['type']->getSQLDeclaration($field, $this);

src/Platforms/SqlitePlatform.php

@@ -394,8 +394,8 @@ class SqlitePlatform extends AbstractPlatform
      */
     protected function getVarcharTypeDeclarationSQLSnippet($length, $fixed)
     {
-        return $fixed ? ($length ? 'CHAR(' . $length . ')' : 'CHAR(255)')
-                : ($length ? 'VARCHAR(' . $length . ')' : 'TEXT');
+        return $fixed ? ($length > 0 ? 'CHAR(' . $length . ')' : 'CHAR(255)')
+            : ($length > 0 ? 'VARCHAR(' . $length . ')' : 'TEXT');
     }
 
     /**
@@ -1109,7 +1109,7 @@ class SqlitePlatform extends AbstractPlatform
 
         foreach ($diff->removedIndexes as $index) {
             $indexName = strtolower($index->getName());
-            if (! strlen($indexName) || ! isset($indexes[$indexName])) {
+            if (strlen($indexName) === 0 || ! isset($indexes[$indexName])) {
                 continue;
             }
 
@@ -1118,7 +1118,7 @@ class SqlitePlatform extends AbstractPlatform
 
         foreach (array_merge($diff->changedIndexes, $diff->addedIndexes, $diff->renamedIndexes) as $index) {
             $indexName = strtolower($index->getName());
-            if (strlen($indexName)) {
+            if (strlen($indexName) > 0) {
                 $indexes[$indexName] = $index;
             } else {
                 $indexes[] = $index;
@@ -1167,7 +1167,7 @@ class SqlitePlatform extends AbstractPlatform
             }
 
             $constraintName = strtolower($constraint->getName());
-            if (! strlen($constraintName) || ! isset($foreignKeys[$constraintName])) {
+            if (strlen($constraintName) === 0 || ! isset($foreignKeys[$constraintName])) {
                 continue;
             }
 
@@ -1176,7 +1176,7 @@ class SqlitePlatform extends AbstractPlatform
 
         foreach (array_merge($diff->changedForeignKeys, $diff->addedForeignKeys) as $constraint) {
             $constraintName = strtolower($constraint->getName());
-            if (strlen($constraintName)) {
+            if (strlen($constraintName) > 0) {
                 $foreignKeys[$constraintName] = $constraint;
             } else {
                 $foreignKeys[] = $constraint;

src/Portability/Connection.php

@@ -63,7 +63,7 @@ class Connection extends \Doctrine\DBAL\Connection
                 $this->portability = $params['portability'];
             }
 
-            if (isset($params['fetch_case']) && $this->portability & self::PORTABILITY_FIX_CASE) {
+            if (isset($params['fetch_case']) && ($this->portability & self::PORTABILITY_FIX_CASE) !== 0) {
                 if ($this->_conn instanceof PDOConnection) {
                     // make use of c-level support for case handling
                     $this->_conn->getWrappedConnection()->setAttribute(PDO::ATTR_CASE, $params['fetch_case']);

src/Portability/Statement.php

@@ -135,10 +135,10 @@ class Statement implements IteratorAggregate, DriverStatement
 
         $row = $this->stmt->fetch($fetchMode, ...$args);
 
-        $iterateRow = $this->portability & (Connection::PORTABILITY_EMPTY_TO_NULL|Connection::PORTABILITY_RTRIM);
+        $iterateRow = ($this->portability & (Connection::PORTABILITY_EMPTY_TO_NULL|Connection::PORTABILITY_RTRIM)) !== 0;
         $fixCase    = $this->case !== null
             && ($fetchMode === FetchMode::ASSOCIATIVE || $fetchMode === FetchMode::MIXED)
-            && ($this->portability & Connection::PORTABILITY_FIX_CASE);
+            && ($this->portability & Connection::PORTABILITY_FIX_CASE) !== 0;
 
         $row = $this->fixRow($row, $iterateRow, $fixCase);
 
@@ -154,10 +154,10 @@ class Statement implements IteratorAggregate, DriverStatement
 
         $rows = $this->stmt->fetchAll($fetchMode, ...$args);
 
-        $iterateRow = $this->portability & (Connection::PORTABILITY_EMPTY_TO_NULL|Connection::PORTABILITY_RTRIM);
+        $iterateRow = ($this->portability & (Connection::PORTABILITY_EMPTY_TO_NULL|Connection::PORTABILITY_RTRIM)) !== 0;
         $fixCase    = $this->case !== null
             && ($fetchMode === FetchMode::ASSOCIATIVE || $fetchMode === FetchMode::MIXED)
-            && ($this->portability & Connection::PORTABILITY_FIX_CASE);
+            && ($this->portability & Connection::PORTABILITY_FIX_CASE) !== 0;
 
         if (! $iterateRow && ! $fixCase) {
             return $rows;
@@ -184,14 +184,14 @@ class Statement implements IteratorAggregate, DriverStatement
 
     /**
      * @param mixed $row
-     * @param int   $iterateRow
+     * @param bool  $iterateRow
      * @param bool  $fixCase
      *
      * @return mixed
      */
     protected function fixRow($row, $iterateRow, $fixCase)
     {
-        if (! $row) {
+        if ($row === false) {
             return $row;
         }
 
@@ -201,9 +201,9 @@ class Statement implements IteratorAggregate, DriverStatement
 
         if ($iterateRow) {
             foreach ($row as $k => $v) {
-                if (($this->portability & Connection::PORTABILITY_EMPTY_TO_NULL) && $v === '') {
+                if (($this->portability & Connection::PORTABILITY_EMPTY_TO_NULL) !== 0 && $v === '') {
                     $row[$k] = null;
-                } elseif (($this->portability & Connection::PORTABILITY_RTRIM) && is_string($v)) {
+                } elseif (($this->portability & Connection::PORTABILITY_RTRIM) !== 0 && is_string($v)) {
                     $row[$k] = rtrim($v);
                 }
             }
@@ -219,13 +219,11 @@ class Statement implements IteratorAggregate, DriverStatement
     {
         $value = $this->stmt->fetchColumn($columnIndex);
 
-        if ($this->portability & (Connection::PORTABILITY_EMPTY_TO_NULL|Connection::PORTABILITY_RTRIM)) {
-            if (($this->portability & Connection::PORTABILITY_EMPTY_TO_NULL) && $value === '') {
+        if (($this->portability & Connection::PORTABILITY_EMPTY_TO_NULL) !== 0 && $value === '') {
             $value = null;
-            } elseif (($this->portability & Connection::PORTABILITY_RTRIM) && is_string($value)) {
+        } elseif (($this->portability & Connection::PORTABILITY_RTRIM) !== 0 && is_string($value)) {
             $value = rtrim($value);
         }
-        }
 
         return $value;
     }

src/Query/QueryBuilder.php

@@ -548,7 +548,7 @@ class QueryBuilder
     {
         $this->type = self::DELETE;
 
-        if (! $delete) {
+        if ($delete === null) {
             return $this;
         }
 
@@ -578,7 +578,7 @@ class QueryBuilder
     {
         $this->type = self::UPDATE;
 
-        if (! $update) {
+        if ($update === null) {
             return $this;
         }
 
@@ -611,7 +611,7 @@ class QueryBuilder
     {
         $this->type = self::INSERT;
 
-        if (! $insert) {
+        if ($insert === null) {
             return $this;
         }
 
@@ -1053,7 +1053,7 @@ class QueryBuilder
      */
     public function orderBy($sort, $order = null)
     {
-        return $this->add('orderBy', $sort . ' ' . (! $order ? 'ASC' : $order), false);
+        return $this->add('orderBy', $sort . ' ' . ($order ?? 'ASC'), false);
     }
 
     /**
@@ -1066,7 +1066,7 @@ class QueryBuilder
      */
     public function addOrderBy($sort, $order = null)
     {
-        return $this->add('orderBy', $sort . ' ' . (! $order ? 'ASC' : $order), true);
+        return $this->add('orderBy', $sort . ' ' . ($order ?? 'ASC'), true);
     }
 
     /**

src/SQLParserUtils.php

@@ -155,7 +155,7 @@ class SQLParserUtils
             $arrayPositions[$name] = false;
         }
 
-        if (( ! $arrayPositions && $isPositional)) {
+        if ($isPositional && count($arrayPositions) === 0) {
             return [$query, $params, $types];
         }
 
@@ -184,7 +184,7 @@ class SQLParserUtils
 
                 $types = array_merge(
                     array_slice($types, 0, $needle),
-                    $count ?
+                    $count > 0 ?
                         // array needles are at {@link \Doctrine\DBAL\ParameterType} constants
                         // + {@link Doctrine\DBAL\Connection::ARRAY_PARAM_OFFSET}
                         array_fill(0, $count, $types[$needle] - Connection::ARRAY_PARAM_OFFSET) :
@@ -192,7 +192,7 @@ class SQLParserUtils
                     array_slice($types, $needle + 1)
                 );
 
-                $expandStr = $count ? implode(', ', array_fill(0, $count, '?')) : 'NULL';
+                $expandStr = $count > 0 ? implode(', ', array_fill(0, $count, '?')) : 'NULL';
                 $query     = substr($query, 0, $needlePos) . $expandStr . substr($query, $needlePos + 1);
 
                 $paramOffset += ($count - 1); // Grows larger by number of parameters minus the replaced needle.

src/Schema/AbstractAsset.php

@@ -114,7 +114,7 @@ abstract class AbstractAsset
     public function getFullQualifiedName($defaultNamespaceName)
     {
         $name = $this->getName();
-        if (! $this->_namespace) {
+        if ($this->_namespace === null) {
             $name = $defaultNamespaceName . '.' . $name;
         }
 
@@ -162,7 +162,7 @@ abstract class AbstractAsset
      */
     public function getName()
     {
-        if ($this->_namespace) {
+        if ($this->_namespace !== null) {
             return $this->_namespace . '.' . $this->_name;
         }
 

src/Schema/AbstractSchemaManager.php

@@ -155,7 +155,7 @@ abstract class AbstractSchemaManager
      */
     public function listTableColumns($table, $database = null)
     {
-        if (! $database) {
+        if ($database === null) {
             $database = $this->_conn->getDatabase();
         }
 
@@ -226,7 +226,7 @@ abstract class AbstractSchemaManager
     protected function filterAssetNames($assetNames)
     {
         $filter = $this->_conn->getConfiguration()->getSchemaAssetsFilter();
-        if (! $filter) {
+        if ($filter === null) {
             return $assetNames;
         }
 
@@ -628,13 +628,7 @@ abstract class AbstractSchemaManager
     {
         $list = [];
         foreach ($databases as $value) {
-            $value = $this->_getPortableDatabaseDefinition($value);
-
-            if (! $value) {
-                continue;
-            }
-
-            $list[] = $value;
+            $list[] = $this->_getPortableDatabaseDefinition($value);
         }
 
         return $list;
@@ -806,7 +800,7 @@ abstract class AbstractSchemaManager
                 $column = $this->_getPortableTableColumnDefinition($tableColumn);
             }
 
-            if (! $column) {
+            if ($column === null) {
                 continue;
             }
 
@@ -886,7 +880,7 @@ abstract class AbstractSchemaManager
                 $index = new Index($data['name'], $data['columns'], $data['unique'], $data['primary'], $data['flags'], $data['options']);
             }
 
-            if (! $index) {
+            if ($index === null) {
                 continue;
             }
 
@@ -905,13 +899,7 @@ abstract class AbstractSchemaManager
     {
         $list = [];
         foreach ($tables as $value) {
-            $value = $this->_getPortableTableDefinition($value);
-
-            if (! $value) {
-                continue;
-            }
-
-            $list[] = $value;
+            $list[] = $this->_getPortableTableDefinition($value);
         }
 
         return $list;
@@ -936,13 +924,7 @@ abstract class AbstractSchemaManager
     {
         $list = [];
         foreach ($users as $value) {
-            $value = $this->_getPortableUserDefinition($value);
-
-            if (! $value) {
-                continue;
-            }
-
-            $list[] = $value;
+            $list[] = $this->_getPortableUserDefinition($value);
         }
 
         return $list;
@@ -969,7 +951,7 @@ abstract class AbstractSchemaManager
         foreach ($views as $value) {
             $view = $this->_getPortableViewDefinition($value);
 
-            if (! $view) {
+            if ($view === false) {
                 continue;
             }
 
@@ -1107,7 +1089,7 @@ abstract class AbstractSchemaManager
      */
     public function extractDoctrineTypeFromComment($comment, $currentType)
     {
-        if ($comment !== null && preg_match('(\(DC2Type:(((?!\)).)+)\))', $comment, $match)) {
+        if ($comment !== null && preg_match('(\(DC2Type:(((?!\)).)+)\))', $comment, $match) === 1) {
             return $match[1];
         }
 

src/Schema/ColumnDiff.php

@@ -48,7 +48,7 @@ class ColumnDiff
      */
     public function getOldColumnName()
     {
-        $quote = $this->fromColumn && $this->fromColumn->isQuoted();
+        $quote = $this->fromColumn !== null && $this->fromColumn->isQuoted();
 
         return new Identifier($this->oldColumnName, $quote);
     }

src/Schema/Comparator.php

@@ -293,7 +293,7 @@ class Comparator
             $changes++;
         }
 
-        return $changes ? $tableDifferences : false;
+        return $changes > 0 ? $tableDifferences : false;
     }
 
     /**

src/Schema/DB2SchemaManager.php

@@ -51,7 +51,7 @@ class DB2SchemaManager extends AbstractSchemaManager
         if ($tableColumn['default'] !== null && $tableColumn['default'] !== 'NULL') {
             $default = $tableColumn['default'];
 
-            if (preg_match('/^\'(.*)\'$/s', $default, $matches)) {
+            if (preg_match('/^\'(.*)\'$/s', $default, $matches) === 1) {
                 $default = str_replace("''", "'", $matches[1]);
             }
         }

src/Schema/MySqlSchemaManager.php

@@ -143,7 +143,11 @@ class MySqlSchemaManager extends AbstractSchemaManager
             case 'real':
             case 'numeric':
             case 'decimal':
-                if (preg_match('([A-Za-z]+\(([0-9]+)\,([0-9]+)\))', $tableColumn['type'], $match)) {
+                if (preg_match(
+                    '([A-Za-z]+\(([0-9]+),([0-9]+)\))',
+                    $tableColumn['type'],
+                    $match
+                ) === 1) {
                     $precision = $match[1];
                     $scale     = $match[2];
                     $length    = null;
@@ -237,7 +241,7 @@ class MySqlSchemaManager extends AbstractSchemaManager
             return null;
         }
 
-        if (preg_match('/^\'(.*)\'$/', $columnDefault, $matches)) {
+        if (preg_match('/^\'(.*)\'$/', $columnDefault, $matches) === 1) {
             return strtr($matches[1], self::MARIADB_ESCAPE_SEQUENCES);
         }
 

src/Schema/OracleSchemaManager.php

@@ -124,7 +124,7 @@ class OracleSchemaManager extends AbstractSchemaManager
 
         $dbType = strtolower($tableColumn['data_type']);
         if (strpos($dbType, 'timestamp(') === 0) {
-            if (strpos($dbType, 'with time zone')) {
+            if (strpos($dbType, 'with time zone') !== false) {
                 $dbType = 'timestamptz';
             } else {
                 $dbType = 'timestamp';
@@ -146,7 +146,7 @@ class OracleSchemaManager extends AbstractSchemaManager
 
         if ($tableColumn['data_default'] !== null) {
             // Default values returned from database are represented as literal expressions
-            if (preg_match('/^\'(.*)\'$/s', $tableColumn['data_default'], $matches)) {
+            if (preg_match('/^\'(.*)\'$/s', $tableColumn['data_default'], $matches) === 1) {
                 $tableColumn['data_default'] = str_replace("''", "'", $matches[1]);
             }
         }
@@ -345,7 +345,7 @@ class OracleSchemaManager extends AbstractSchemaManager
      */
     private function getQuotedIdentifierName($identifier)
     {
-        if (preg_match('/[a-z]/', $identifier)) {
+        if (preg_match('/[a-z]/', $identifier) === 1) {
             return $this->_platform->quoteIdentifier($identifier);
         }
 

src/Schema/PostgreSqlSchemaManager.php

@@ -138,14 +138,26 @@ class PostgreSqlSchemaManager extends AbstractSchemaManager
         $foreignColumns = [];
         $foreignTable   = null;
 
-        if (preg_match('(ON UPDATE ([a-zA-Z0-9]+( (NULL|ACTION|DEFAULT))?))', $tableForeignKey['condef'], $match)) {
+        if (preg_match(
+            '(ON UPDATE ([a-zA-Z0-9]+( (NULL|ACTION|DEFAULT))?))',
+            $tableForeignKey['condef'],
+            $match
+        ) === 1) {
             $onUpdate = $match[1];
         }
-        if (preg_match('(ON DELETE ([a-zA-Z0-9]+( (NULL|ACTION|DEFAULT))?))', $tableForeignKey['condef'], $match)) {
+        if (preg_match(
+            '(ON DELETE ([a-zA-Z0-9]+( (NULL|ACTION|DEFAULT))?))',
+            $tableForeignKey['condef'],
+            $match
+        ) === 1) {
             $onDelete = $match[1];
         }
 
-        if (preg_match('/FOREIGN KEY \((.+)\) REFERENCES (.+)\((.+)\)/', $tableForeignKey['condef'], $values)) {
+        if (preg_match(
+            '/FOREIGN KEY \((.+)\) REFERENCES (.+)\((.+)\)/',
+            $tableForeignKey['condef'],
+            $values
+        ) === 1) {
             // PostgreSQL returns identifiers that are keywords with quotes, we need them later, don't get
             // the idea to trim them here.
             $localColumns   = array_map('trim', explode(',', $values[1]));
@@ -323,15 +335,15 @@ class PostgreSqlSchemaManager extends AbstractSchemaManager
         $matches = [];
 
         $autoincrement = false;
-        if (preg_match("/^nextval\('(.*)'(::.*)?\)$/", $tableColumn['default'], $matches)) {
+        if (preg_match("/^nextval\('(.*)'(::.*)?\)$/", $tableColumn['default'], $matches) === 1) {
             $tableColumn['sequence'] = $matches[1];
             $tableColumn['default']  = null;
             $autoincrement           = true;
         }
 
-        if (preg_match("/^['(](.*)[')]::/", $tableColumn['default'], $matches)) {
+        if (preg_match("/^['(](.*)[')]::/", $tableColumn['default'], $matches) === 1) {
             $tableColumn['default'] = $matches[1];
-        } elseif (preg_match('/^NULL::/', $tableColumn['default'])) {
+        } elseif (preg_match('/^NULL::/', $tableColumn['default']) === 1) {
             $tableColumn['default'] = null;
         }
 
@@ -353,7 +365,8 @@ class PostgreSqlSchemaManager extends AbstractSchemaManager
         $jsonb     = null;
 
         $dbType = strtolower($tableColumn['type']);
-        if (strlen($tableColumn['domain_type']) && ! $this->_platform->hasDoctrineTypeMappingFor($tableColumn['type'])) {
+        if (strlen($tableColumn['domain_type']) > 0
+            && ! $this->_platform->hasDoctrineTypeMappingFor($tableColumn['type'])) {
             $dbType                       = strtolower($tableColumn['domain_type']);
             $tableColumn['complete_type'] = $tableColumn['domain_complete_type'];
         }
@@ -415,7 +428,11 @@ class PostgreSqlSchemaManager extends AbstractSchemaManager
             case 'numeric':
                 $tableColumn['default'] = $this->fixVersion94NegativeNumericDefaultValue($tableColumn['default']);
 
-                if (preg_match('([A-Za-z]+\(([0-9]+)\,([0-9]+)\))', $tableColumn['complete_type'], $match)) {
+                if (preg_match(
+                    '([A-Za-z]+\(([0-9]+)\,([0-9]+)\))',
+                    $tableColumn['complete_type'],
+                    $match
+                ) === 1) {
                     $precision = $match[1];
                     $scale     = $match[2];
                     $length    = null;
@@ -431,7 +448,11 @@ class PostgreSqlSchemaManager extends AbstractSchemaManager
                 break;
         }
 
-        if ($tableColumn['default'] && preg_match("('([^']+)'::)", $tableColumn['default'], $match)) {
+        if ($tableColumn['default'] !== null && preg_match(
+            "('([^']+)'::)",
+            $tableColumn['default'],
+            $match
+        ) === 1) {
             $tableColumn['default'] = $match[1];
         }
 

src/Schema/SQLServerSchemaManager.php

@@ -134,7 +134,7 @@ class SQLServerSchemaManager extends AbstractSchemaManager
             return null;
         }
 
-        if (preg_match('/^\'(.*)\'$/s', $value, $matches)) {
+        if (preg_match('/^\'(.*)\'$/s', $value, $matches) === 1) {
             $value = str_replace("''", "'", $matches[1]);
         }
 

src/Schema/SqliteSchemaManager.php

@@ -131,7 +131,7 @@ class SqliteSchemaManager extends AbstractSchemaManager
                     )?#isx',
                 $createSql,
                 $match
-            )) {
+            ) > 0) {
                 $names      = array_reverse($match[1]);
                 $deferrable = array_reverse($match[2]);
                 $deferred   = array_reverse($match[3]);
@@ -334,7 +334,7 @@ class SqliteSchemaManager extends AbstractSchemaManager
 
         if ($default !== null) {
             // SQLite returns the default value as a literal expression, so we need to parse it
-            if (preg_match('/^\'(.*)\'$/s', $default, $matches)) {
+            if (preg_match('/^\'(.*)\'$/s', $default, $matches) === 1) {
                 $default = str_replace("''", "'", $matches[1]);
             }
         }

src/Schema/Table.php

@@ -271,7 +271,7 @@ class Table extends AbstractAsset
      */
     private function _createIndex(array $columnNames, $indexName, $isUnique, $isPrimary, array $flags = [], array $options = [])
     {
-        if (preg_match('(([^a-zA-Z0-9_]+))', $this->normalizeIdentifier($indexName))) {
+        if (preg_match('(([^a-zA-Z0-9_]+))', $this->normalizeIdentifier($indexName)) === 1) {
             throw SchemaException::indexNameInvalid($indexName);
         }
 
@@ -511,7 +511,7 @@ class Table extends AbstractAsset
     {
         $constraint->setLocalTable($this);
 
-        if (strlen($constraint->getName())) {
+        if (strlen($constraint->getName()) > 0) {
             $name = $constraint->getName();
         } else {
             $name = $this->_generateIdentifierName(
@@ -714,7 +714,7 @@ class Table extends AbstractAsset
      */
     public function hasPrimaryKey()
     {
-        return $this->_primaryKeyName && $this->hasIndex($this->_primaryKeyName);
+        return $this->_primaryKeyName !== false && $this->hasIndex($this->_primaryKeyName);
     }
 
     /**

src/Statement.php

@@ -7,7 +7,6 @@ use Doctrine\DBAL\Platforms\AbstractPlatform;
 use Doctrine\DBAL\Types\Type;
 use IteratorAggregate;
 use Throwable;
-use function is_array;
 use function is_string;
 
 /**
@@ -139,19 +138,19 @@ class Statement implements IteratorAggregate, DriverStatement
      */
     public function execute($params = null)
     {
-        if (is_array($params)) {
+        if ($params !== null) {
             $this->params = $params;
         }
 
         $logger = $this->conn->getConfiguration()->getSQLLogger();
-        if ($logger) {
+        if ($logger !== null) {
             $logger->startQuery($this->sql, $this->params, $this->types);
         }
 
         try {
             $stmt = $this->stmt->execute($params);
         } catch (Throwable $ex) {
-            if ($logger) {
+            if ($logger !== null) {
                 $logger->stopQuery();
             }
             throw DBALException::driverExceptionDuringQuery(
@@ -162,7 +161,7 @@ class Statement implements IteratorAggregate, DriverStatement
             );
         }
 
-        if ($logger) {
+        if ($logger !== null) {
             $logger->stopQuery();
         }
         $this->params = [];

src/Tools/Console/Command/ReservedWordsCommand.php

@@ -108,7 +108,7 @@ EOT
         $conn = $this->getHelper('db')->getConnection();
 
         $keywordLists = (array) $input->getOption('list');
-        if (! $keywordLists) {
+        if (count($keywordLists) === 0) {
             $keywordLists = array_keys($this->keywordListClasses);
         }
 

src/Tools/Console/Command/RunSqlCommand.php

@@ -11,6 +11,7 @@ use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Console\Output\OutputInterface;
 use function assert;
+use function is_bool;
 use function is_numeric;
 use function is_string;
 use function stripos;
@@ -59,7 +60,10 @@ EOT
             throw new LogicException("Option 'depth' must contains an integer value");
         }
 
-        if (stripos($sql, 'select') === 0 || $input->getOption('force-fetch')) {
+        $forceFetch = $input->getOption('force-fetch');
+        assert(is_bool($forceFetch));
+
+        if (stripos($sql, 'select') === 0 || $forceFetch) {
             $resultSet = $conn->fetchAll($sql);
         } else {
             $resultSet = $conn->executeUpdate($sql);

src/Types/DateImmutableType.php

@@ -49,7 +49,7 @@ class DateImmutableType extends DateType
 
         $dateTime = DateTimeImmutable::createFromFormat('!' . $platform->getDateFormatString(), $value);
 
-        if (! $dateTime) {
+        if ($dateTime === false) {
             throw ConversionException::conversionFailedFormat(
                 $value,
                 $this->getName(),

src/Types/DateTimeImmutableType.php

@@ -50,11 +50,11 @@ class DateTimeImmutableType extends DateTimeType
 
         $dateTime = DateTimeImmutable::createFromFormat($platform->getDateTimeFormatString(), $value);
 
-        if (! $dateTime) {
+        if ($dateTime === false) {
             $dateTime = date_create_immutable($value);
         }
 
-        if (! $dateTime) {
+        if ($dateTime === false) {
             throw ConversionException::conversionFailedFormat(
                 $value,
                 $this->getName(),

src/Types/DateTimeType.php

@@ -55,11 +55,11 @@ class DateTimeType extends Type implements PhpDateTimeMappingType
 
         $val = DateTime::createFromFormat($platform->getDateTimeFormatString(), $value);
 
-        if (! $val) {
+        if ($val === false) {
             $val = date_create($value);
         }
 
-        if (! $val) {
+        if ($val === false) {
             throw ConversionException::conversionFailedFormat($value, $this->getName(), $platform->getDateTimeFormatString());
         }
 

src/Types/DateTimeTzImmutableType.php

@@ -49,7 +49,7 @@ class DateTimeTzImmutableType extends DateTimeTzType
 
         $dateTime = DateTimeImmutable::createFromFormat($platform->getDateTimeTzFormatString(), $value);
 
-        if (! $dateTime) {
+        if ($dateTime === false) {
             throw ConversionException::conversionFailedFormat(
                 $value,
                 $this->getName(),

src/Types/DateTimeTzType.php

@@ -66,7 +66,7 @@ class DateTimeTzType extends Type implements PhpDateTimeMappingType
         }
 
         $val = DateTime::createFromFormat($platform->getDateTimeTzFormatString(), $value);
-        if (! $val) {
+        if ($val === false) {
             throw ConversionException::conversionFailedFormat($value, $this->getName(), $platform->getDateTimeTzFormatString());
         }
 

src/Types/DateType.php

@@ -53,7 +53,7 @@ class DateType extends Type
         }
 
         $val = DateTime::createFromFormat('!' . $platform->getDateFormatString(), $value);
-        if (! $val) {
+        if ($val === false) {
             throw ConversionException::conversionFailedFormat($value, $this->getName(), $platform->getDateFormatString());
         }
 

src/Types/SimpleArrayType.php

@@ -3,8 +3,10 @@
 namespace Doctrine\DBAL\Types;
 
 use Doctrine\DBAL\Platforms\AbstractPlatform;
+use function count;
 use function explode;
 use function implode;
+use function is_array;
 use function is_resource;
 use function stream_get_contents;
 
@@ -28,7 +30,7 @@ class SimpleArrayType extends Type
      */
     public function convertToDatabaseValue($value, AbstractPlatform $platform)
     {
-        if (! $value) {
+        if (! is_array($value) || count($value) === 0) {
             return null;
         }
 

src/Types/TimeImmutableType.php

@@ -49,7 +49,7 @@ class TimeImmutableType extends TimeType
 
         $dateTime = DateTimeImmutable::createFromFormat('!' . $platform->getTimeFormatString(), $value);
 
-        if (! $dateTime) {
+        if ($dateTime === false) {
             throw ConversionException::conversionFailedFormat(
                 $value,
                 $this->getName(),

src/Types/TimeType.php

@@ -53,7 +53,7 @@ class TimeType extends Type
         }
 
         $val = DateTime::createFromFormat('!' . $platform->getTimeFormatString(), $value);
-        if (! $val) {
+        if ($val === false) {
             throw ConversionException::conversionFailedFormat($value, $this->getName(), $platform->getTimeFormatString());
         }
 

src/Types/VarDateTimeImmutableType.php

@@ -50,7 +50,7 @@ class VarDateTimeImmutableType extends VarDateTimeType
 
         $dateTime = date_create_immutable($value);
 
-        if (! $dateTime) {
+        if ($dateTime === false) {
             throw ConversionException::conversionFailed($value, $this->getName());
         }
 

src/Types/VarDateTimeType.php

@@ -25,7 +25,7 @@ class VarDateTimeType extends DateTimeType
         }
 
         $val = date_create($value);
-        if (! $val) {
+        if ($val === false) {
             throw ConversionException::conversionFailed($value, $this->getName());
         }
 

tests/FunctionalTestCase.php

@@ -68,7 +68,7 @@ abstract class FunctionalTestCase extends TestCase
             throw $t;
         }
 
-        if (isset($this->sqlLoggerStack->queries) && count($this->sqlLoggerStack->queries)) {
+        if (count($this->sqlLoggerStack->queries) > 0) {
             $queries = '';
             $i       = count($this->sqlLoggerStack->queries);
             foreach (array_reverse($this->sqlLoggerStack->queries) as $query) {