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<?php |
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declare(strict_types=1); |
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namespace SetBased\Stratum\MySql\Helper; |
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use SetBased\Stratum\MySql\Exception\MySqlQueryErrorException; |
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use SetBased\Stratum\MySql\MySqlMetaDataLayer; |
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/** |
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* Helper class for handling the SQL mode of the MySQL instance. |
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*/ |
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class SqlModeHelper |
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{ |
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//-------------------------------------------------------------------------------------------------------------------- |
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/** |
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* The canonical SQL mode. |
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* |
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* @var string |
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*/ |
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private $canonicalSqlMode; |
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/** |
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* The canonical SQL mode with ORACLE. |
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* |
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* @var ?string |
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*/ |
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private $canonicalSqlModeWithOracle = null; |
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/** |
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* The current SQL mode (also in canonical order). |
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* |
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* @var string |
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*/ |
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private $currentSqlMode; |
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/** |
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* The metadata layer. |
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* |
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* @var MySqlMetaDataLayer |
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*/ |
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private $dl; |
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//-------------------------------------------------------------------------------------------------------------------- |
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/** |
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* Object constructor. |
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* |
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* @param MySqlMetaDataLayer $dl The metadata layer. |
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* @param string $sqlMode The SQL mode. |
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* |
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* @throws MySqlQueryErrorException |
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*/ |
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public function __construct(MySqlMetaDataLayer $dl, string $sqlMode) |
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{ |
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$this->dl = $dl; |
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try |
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{ |
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$this->dl->setSqlMode('ORACLE'); |
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$hasOracleMode = true; |
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} |
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catch (MySqlQueryErrorException $e) |
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{ |
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$hasOracleMode = false; |
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} |
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if ($hasOracleMode) |
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{ |
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$parts = explode(',', $sqlMode); |
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$parts[] = 'ORACLE'; |
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$this->dl->setSqlMode(implode(',', $parts)); |
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$this->canonicalSqlModeWithOracle = $this->dl->getCanonicalSqlMode(); |
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} |
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else |
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{ |
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$this->canonicalSqlModeWithOracle = null; |
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} |
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$this->dl->setSqlMode($sqlMode); |
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$this->canonicalSqlMode = $this->dl->getCanonicalSqlMode(); |
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$this->currentSqlMode = $this->canonicalSqlMode; |
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} |
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//-------------------------------------------------------------------------------------------------------------------- |
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/** |
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* Adds ORACLE too the current SQL_MODE if the initial SQL_MODE did not include ORACLE. |
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* |
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* @throws MySqlQueryErrorException |
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*/ |
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public function addIfRequiredOracleMode(): void |
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{ |
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if ($this->currentSqlMode!==$this->canonicalSqlModeWithOracle) |
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{ |
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$this->dl->setSqlMode($this->canonicalSqlModeWithOracle); |
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$this->currentSqlMode = $this->canonicalSqlModeWithOracle; |
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} |
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} |
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//-------------------------------------------------------------------------------------------------------------------- |
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/** |
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* Compares a SQL mode with the current SQL mode with or without ORACLE when appropriate. |
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* |
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* @param string $sqlMode The SQL mode. |
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* |
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* @return bool |
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*/ |
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public function compare(string $sqlMode): bool |
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{ |
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$parts = explode(',', $sqlMode); |
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if (in_array('ORACLE', $parts)) |
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{ |
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return ($sqlMode===$this->canonicalSqlModeWithOracle); |
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} |
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return ($sqlMode===$this->canonicalSqlMode); |
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} |
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//-------------------------------------------------------------------------------------------------------------------- |
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/** |
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* Returns true if and only if the MySQL instance has ORACLE SQL mode. |
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* |
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* @return bool |
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*/ |
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public function hasOracleMode(): bool |
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{ |
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return ($this->canonicalSqlModeWithOracle!==null); |
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} |
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//-------------------------------------------------------------------------------------------------------------------- |
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/** |
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* Removes ORACLE from the current SQL_MODE if the initial SQL_MODE did not include ORACLE. |
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* |
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* @throws MySqlQueryErrorException |
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*/ |
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public function removeIfRequiredOracleMode(): void |
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{ |
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if ($this->currentSqlMode!==$this->canonicalSqlMode) |
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{ |
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$this->dl->setSqlMode($this->canonicalSqlMode); |
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$this->currentSqlMode = $this->canonicalSqlMode; |
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} |
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} |
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//-------------------------------------------------------------------------------------------------------------------- |
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} |
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//---------------------------------------------------------------------------------------------------------------------- |
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DatabaseStratum /
php-stratum-mysql
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