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<?php |
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/* |
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* The MIT License |
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* |
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* Copyright 2017 David Schoenbauer <[email protected]>. |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy |
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* of this software and associated documentation files (the "Software"), to deal |
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* in the Software without restriction, including without limitation the rights |
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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* copies of the Software, and to permit persons to whom the Software is |
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* furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included in |
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* all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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* THE SOFTWARE. |
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*/ |
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namespace DSchoenbauer\Sql\Command; |
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use DSchoenbauer\Sql\Exception\ExecutionErrorException; |
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use DSchoenbauer\Sql\Exception\NoRecordsAffectedException; |
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use DSchoenbauer\Sql\Exception\NoRecordsAffectedSelectException; |
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use DSchoenbauer\Sql\Where\WhereStatementInterface; |
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use PDO; |
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use PDOStatement; |
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/** |
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* retrieves data from a PDO connected resource |
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* @author David Schoenbauer <[email protected]> |
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*/ |
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class Select extends AbstractCommand |
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{ |
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private $table; |
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private $fields = ['*']; |
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private $data = null; |
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private $fetchStyle = \PDO::FETCH_ASSOC; |
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private $fetchFlat = false; |
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private $defaultValue = []; |
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use WhereTrait; |
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/** |
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* retrieves data from a PDO connected resource |
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* @param string $table name of the table that houses the data |
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* @param array $fields optional default value: empty array - defines which |
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* fields are returned if no fields defined a star will be used |
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* @param null|WhereStatementInterface $where optional default value: null - |
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* object used to limit the returned results |
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* @param integer $fetchStyle optional default value: PDO::FETCH_ASSOC - |
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* sets how the PDO statement will return records |
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* @param boolean $fetchFlat optional default value: false - true will |
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* return one record, false will return all records |
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* @param mixed $defaultValue optional default value: empty array - |
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* value to be returned on query failure |
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* @since v1.0.0 |
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*/ |
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public function __construct( |
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$table, |
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$fields = [], |
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WhereStatementInterface $where = null, |
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$fetchStyle = \PDO::FETCH_ASSOC, |
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$fetchFlat = false, |
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$defaultValue = [] |
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) { |
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$this->setTable($table) |
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->setFields($fields) |
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->setFetchStyle($fetchStyle) |
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->setFetchFlat($fetchFlat) |
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->setDefaultValue($defaultValue) |
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->setWhere($where); |
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} |
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/** |
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* Runs a query and returns the result of the SQL |
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* @param PDO $pdo a PDO connection object |
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* @return mixed with return the result set as defined by fetchStyle |
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* @throws ExecutionErrorException on SQL error with the message of the exception |
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* @since v1.0.0 |
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*/ |
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public function execute(PDO $pdo) |
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{ |
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try { |
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$stmt = $pdo->prepare($this->getSql()); |
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$this->statementExecute($stmt, $this->getWhereData()); |
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$this->checkAffected($stmt, new NoRecordsAffectedSelectException()); |
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$data = $this->fetchData( |
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$stmt, |
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$this->getFetchFlat(), |
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$this->getFetchStyle() |
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); |
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$this->setData($data ?: $this->getDefaultValue()); |
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return $this->getData(); |
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} catch (NoRecordsAffectedException $exc) { |
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throw $exc; |
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} catch (\Exception $exc) { |
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throw new ExecutionErrorException($exc->getMessage()); |
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} |
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} |
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/** |
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* Runs the sql statement inserting the query's data |
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* @param PDOStatement $stmt PDO statement of a prepared SQL statement |
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* @param array $whereData data to be used to fill out a where statement |
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* @return bool true query succeeds, false there was an error executing the query |
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* @since v1.0.0 |
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*/ |
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protected function statementExecute(PDOStatement $stmt, array $whereData) |
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{ |
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if (count($whereData) > 0) { |
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return $stmt->execute($whereData); |
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} |
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return $stmt->execute(); |
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} |
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/** |
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* Fetches the data from PDO resource |
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* @param PDOStatement $stmt PDO statement of a prepared SQL statement |
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* @param bool $fetchFlat true returns one record, false returns all records |
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* @param integer $fetchStyle a \PDO::FETCH_* variable defining the format of |
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* the returned object |
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* @return array returns the results of the query |
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* @since v1.0.0 |
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*/ |
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protected function fetchData(PDOStatement $stmt, $fetchFlat, $fetchStyle) |
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{ |
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if ($fetchFlat) { |
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return $stmt->fetch($fetchStyle); |
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} |
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return $stmt->fetchAll($fetchStyle); |
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} |
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/** |
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* returns a PDO SQL string that has parameter syntax |
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* @return string |
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* @since v1.0.0 |
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*/ |
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public function getSql() |
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{ |
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$sqlTemplate = "SELECT %s FROM %s %s"; |
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$fieldsCompiled = implode(',', $this->getFields()); |
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return trim(sprintf( |
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$sqlTemplate, |
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$fieldsCompiled, |
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$this->getTable(), |
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$this->getWhereStatement() |
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)); |
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} |
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/** |
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* acts as a cache to house ran queries |
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* @param mixed $data data to be stored |
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* @return Select for method chaining |
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* @since v1.0.0 |
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*/ |
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public function setData($data) |
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{ |
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$this->data = $data; |
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return $this; |
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} |
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/** |
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* Acts as a cache array that holds the data returned from a query |
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* @return mixed |
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* @since v1.0.0 |
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*/ |
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public function getData() |
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{ |
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return $this->data; |
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} |
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/** |
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* retrieves the table with which you wish to select from |
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* @return string table with which you wish to select from |
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* @since v1.0.0 |
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*/ |
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public function getTable() |
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{ |
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return $this->table; |
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} |
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/** |
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* defines a table with which you wish to append to |
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* @param string $table a table with which you wish to append to |
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* @return Select for method chaining |
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* @since v1.0.0 |
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*/ |
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public function setTable($table) |
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{ |
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$this->table = $table; |
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return $this; |
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} |
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/** |
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* Returns the fields to be returned, if no fields defined all fields are returned |
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* @return array |
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* @since v1.0.0 |
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*/ |
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public function getFields() |
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{ |
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return $this->fields; |
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} |
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/** |
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* Defines the fields to be returned, if no fields defined all fields are returned |
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* @param null|array $fields |
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* @return Select for method chaining |
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* @since v1.0.0 |
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*/ |
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public function setFields(array $fields = null) |
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{ |
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$this->fields = $fields ?: ["*"]; |
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return $this; |
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} |
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/** |
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* defines how data is returned |
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* @return int $fetchStyle one of the PDO::FETCH_* |
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* @since v1.0.0 |
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*/ |
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public function getFetchStyle() |
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{ |
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return $this->fetchStyle; |
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} |
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/** |
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* used to define how data is returned |
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* @param int $fetchStyle one of the PDO::FETCH_* |
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* @return Select for method chaining |
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* @since v1.0.0 |
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*/ |
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public function setFetchStyle($fetchStyle) |
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{ |
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$this->fetchStyle = $fetchStyle; |
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return $this; |
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} |
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/** |
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* sets if one or many records will be returned. |
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* @return bool true for one record, false for all records |
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* @since v1.0.0 |
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*/ |
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public function getFetchFlat() |
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{ |
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return $this->fetchFlat; |
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} |
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/** |
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* sets if one or many records will be returned. |
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* @param boolean $fetchFlat optional default value: false - true will |
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* return one record, false will return all records |
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* @return Select for method chaining |
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* @since v1.0.0 |
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*/ |
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public function setFetchFlat($fetchFlat = true) |
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{ |
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$this->fetchFlat = $fetchFlat; |
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return $this; |
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} |
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/** |
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* Value to be returned if no data is found or query fails |
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* @return mixed return the value used when the query returns false |
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* @since v1.0.0 |
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*/ |
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public function getDefaultValue() |
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{ |
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return $this->defaultValue; |
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} |
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/** |
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* Value to be returned if no data is found or query fails |
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* @param array $defaultValue optional default value: empty array - value to |
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* be returned on query failure |
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* @return Select for method chaining |
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* @since v1.0.0 |
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*/ |
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public function setDefaultValue($defaultValue = []) |
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{ |
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$this->defaultValue = $defaultValue; |
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return $this; |
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} |
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} |
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