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<?php |
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namespace Mezon\PdoCrud; |
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/** |
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* Class PdoCrud |
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* |
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* @package Mezon |
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* @subpackage PdoCrud |
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* @author Dodonov A.A. |
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* @version v.1.0 (2019/08/16) |
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* @copyright Copyright (c) 2019, aeon.org |
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*/ |
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/** |
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* Class provides simple CRUD operations |
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*/ |
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class PdoCrud |
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{ |
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/** |
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* PDO object |
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* |
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* @var \PDO |
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*/ |
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private $pdo = null; |
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use PdoCrudStatement; |
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/** |
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* Method connects to the database |
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* |
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* @param array $connnectionData |
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* Connection settings |
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* @codeCoverageIgnore |
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*/ |
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public function connect(array $connnectionData): void |
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{ |
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// no need to test this single string. assume that PDO developers did it |
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$this->pdo = new \PDO($connnectionData['dsn'], $connnectionData['user'], $connnectionData['password']); |
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$this->query('SET NAMES utf8'); |
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} |
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/** |
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* Method handles request errors |
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* |
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* @param mixed $result |
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* Query result |
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* @param string $query |
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* SQL Query |
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* @codeCoverageIgnore |
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*/ |
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protected function processQueryError($result, string $query): void |
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{ |
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if ($result === false) { |
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$errorInfo = $this->pdo->errorInfo(); |
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throw (new \Exception($errorInfo[2] . ' in statement ' . $query)); |
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} |
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} |
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/** |
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* |
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* @param string $fieldName |
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* @return int |
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*/ |
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public function getRecordsCount(string $fieldName = 'records_count'): int |
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{ |
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$records = $this->executeSelect(); |
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if (empty($records)) { |
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return 0; |
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} else { |
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return $records[0]->$fieldName; |
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} |
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} |
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/** |
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* Getting records |
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* |
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* @param string $fields |
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* List of fields |
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* @param string $tableNames |
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* List of tables |
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* @param string $where |
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* Condition |
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* @param int $from |
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* First record in query |
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* @param int $limit |
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* Count of records |
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* @return array List of records |
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* @deprecated since 2020-06-16 |
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*/ |
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public function select( |
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string $fields, |
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string $tableNames, |
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string $where = '1 = 1', |
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int $from = 0, |
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int $limit = 1000000): array |
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{ |
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$query = "SELECT $fields FROM $tableNames WHERE $where LIMIT " . intval($from) . ' , ' . intval($limit); |
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$result = $this->query($query); |
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$this->processQueryError($result, $query); |
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return $result->fetchAll(\PDO::FETCH_ASSOC); |
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} |
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/** |
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* Method compiles set-query |
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* |
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* @param array $record |
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* Inserting record |
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* @return string Compiled query string |
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*/ |
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protected function compileGetQuery(array $record): string |
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{ |
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$setFieldsStatement = []; |
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foreach ($record as $field => $value) { |
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if (is_string($value) && strtoupper($value) === 'INC') { |
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$setFieldsStatement[] = $field . ' = ' . $field . ' + 1'; |
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} elseif (is_string($value) && strtoupper($value) !== 'NOW()') { |
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$setFieldsStatement[] = $field . ' = "' . $value . '"'; |
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} elseif ($value === null) { |
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$setFieldsStatement[] = $field . ' = NULL'; |
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} else { |
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$setFieldsStatement[] = $field . ' = ' . $value; |
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} |
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} |
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return implode(' , ', $setFieldsStatement); |
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} |
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/** |
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* Method compiles set-multyple-query |
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* |
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* @param array $records |
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* Inserting records |
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* @return string Compiled query string |
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*/ |
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protected function setMultypleQuery(array $records): string |
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{ |
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$query = '( ' . implode(' , ', array_keys($records[0])) . ' ) VALUES '; |
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$values = []; |
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foreach ($records as $record) { |
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$values[] = "( '" . implode("' , '", array_values($record)) . "' )"; |
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} |
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return $query . implode(' , ', $values); |
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} |
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/** |
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* Updating records |
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* |
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* @param string $tableName |
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* Table name |
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* @param array $record |
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* Updating records |
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* @param string $where |
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* Condition |
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* @param int $limit |
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* Limit for afffecting records |
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* @return int Count of updated records |
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* @deprecated Deprecated since 2020-11-21, use execute |
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*/ |
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public function update(string $tableName, array $record, string $where, int $limit = 10000000): int |
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{ |
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$query = 'UPDATE ' . $tableName . ' SET ' . $this->compileGetQuery($record) . ' WHERE ' . $where . ' LIMIT ' . |
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$limit; |
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$result = $this->query($query); |
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$this->processQueryError($result, $query); |
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return $result->rowCount(); |
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} |
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/** |
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* Deleting records |
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* |
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* @param string $tableName |
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* Table name |
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* @param string $where |
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* Condition |
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* @param int $limit |
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* Liti for afffecting records |
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* @return int Count of deleted records |
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* @deprecated Deprecated since 2020-11-21, use execute |
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*/ |
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public function delete($tableName, $where, $limit = 10000000): int |
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{ |
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// TODO remove this method, do not forget to up version |
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$query = 'DELETE FROM ' . $tableName . ' WHERE ' . $where . ' LIMIT ' . intval($limit); |
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$result = $this->query($query); |
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$this->processQueryError($result, $query); |
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return $result->rowCount(); |
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} |
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/** |
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* Method compiles lock queries |
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* |
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* @param array $tables |
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* List of tables |
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* @param array $modes |
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* List of lock modes |
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* @return string Query |
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*/ |
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protected function lockQuery(array $tables, array $modes): string |
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{ |
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$query = []; |
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foreach ($tables as $i => $table) { |
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$query[] = $table . ' ' . $modes[$i]; |
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} |
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return 'LOCK TABLES ' . implode(' , ', $query); |
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} |
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/** |
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* Method locks tables |
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* |
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* @param array $tables |
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* List of tables |
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* @param array $modes |
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* List of lock modes |
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*/ |
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public function lock(array $tables, array $modes): void |
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{ |
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$query = $this->lockQuery($tables, $modes); |
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$result = $this->query($query); |
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$this->processQueryError($result, $query); |
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} |
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/** |
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* Method unlocks locked tables |
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*/ |
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public function unlock(): void |
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{ |
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$result = $this->query('UNLOCK TABLES'); |
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$this->processQueryError($result, 'UNLOCK TABLES'); |
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} |
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/** |
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* Method starts transaction |
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*/ |
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public function startTransaction(): void |
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{ |
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// setting autocommit off |
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$result = $this->query('SET AUTOCOMMIT = 0'); |
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$this->processQueryError($result, 'SET AUTOCOMMIT = 0'); |
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// starting transaction |
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$result = $this->query('START TRANSACTION'); |
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$this->processQueryError($result, 'START TRANSACTION'); |
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} |
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/** |
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* Commiting transaction |
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*/ |
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public function commit(): void |
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{ |
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// commit transaction |
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$result = $this->query('COMMIT'); |
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$this->processQueryError($result, 'COMMIT'); |
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// setting autocommit on |
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$result = $this->query('SET AUTOCOMMIT = 1'); |
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$this->processQueryError($result, 'SET AUTOCOMMIT = 1'); |
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} |
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/** |
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* Rollback transaction |
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*/ |
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public function rollback(): void |
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{ |
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// rollback transaction |
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$result = $this->query('ROLLBACK'); |
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$this->processQueryError($result, 'ROLLBACK'); |
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} |
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/** |
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* Method executes query |
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* |
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* @param string $query |
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* Query |
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* @return mixed Query execution result |
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*/ |
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public function query(string $query) |
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{ |
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// @codeCoverageIgnoreStart |
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return $this->pdo->query($query); |
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// @codeCoverageIgnoreEnd |
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} |
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/** |
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* Method returns id of the last inserted record |
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* |
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* @return int id of the last inserted record |
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*/ |
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public function lastInsertId(): int |
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{ |
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// @codeCoverageIgnoreStart |
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return (int) $this->pdo->lastInsertId(); |
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// @codeCoverageIgnoreEnd |
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} |
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/** |
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* Method inserts record |
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* |
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* @param string $tableName |
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* Table name |
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* @param array $record |
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* Inserting record |
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* @return int New record's id |
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* @deprecated Deprecated since 2020-11-21, use execute |
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*/ |
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public function insert(string $tableName, array $record): int |
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{ |
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$query = 'INSERT ' . $tableName . ' SET ' . $this->compileGetQuery($record); |
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$result = $this->query($query); |
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$this->processQueryError($result, $query); |
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return $this->lastInsertId(); |
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} |
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/** |
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* Method inserts record |
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* |
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* @param string $tableName |
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* Table name |
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* @param array $records |
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* Inserting records |
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* @return int New record's id |
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* @deprecated Deprecated since 2020-11-21, use execute |
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*/ |
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public function insertMultyple(string $tableName, array $records): int |
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{ |
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$query = 'INSERT INTO ' . $tableName . ' ' . $this->setMultypleQuery($records) . ';'; |
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$result = $this->query($query); |
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$this->processQueryError($result, $query); |
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return 0; |
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} |
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/** |
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* Method destroys connection |
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*/ |
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public function __destruct() |
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{ |
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$this->pdo = null; |
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unset($this->pdo); |
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} |
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} |
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