Query/src/QueryBuilder.php

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<?php declare(strict_types=1);
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/**
* Query
*
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* SQL Query Builder / Database Abstraction Layer
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*
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* PHP version 7.1
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*
* @package Query
* @author Timothy J. Warren <tim@timshomepage.net>
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* @copyright 2012 - 2018 Timothy J. Warren
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* @license http://www.opensource.org/licenses/mit-license.html MIT License
* @link https://git.timshomepage.net/aviat4ion/Query
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*/
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namespace Query;
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use BadMethodCallException;
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use PDOStatement;
use Query\Drivers\DriverInterface;
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/**
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* Convenience class for creating sql queries
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*/
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class QueryBuilder extends AbstractQueryBuilder implements QueryBuilderInterface {
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/**
* String class values to be reset
*
* @var array
*/
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private $stringVars = [
'selectString',
'fromString',
'setString',
'orderString',
'groupString',
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'limit',
'offset',
'explain',
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];
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/**
* Array class variables to be reset
*
* @var array
*/
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private $arrayVars = [
'setArrayKeys',
'orderArray',
'groupArray',
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'values',
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'whereValues',
'queryMap',
'havingMap'
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];
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// --------------------------------------------------------------------------
// ! Methods
// --------------------------------------------------------------------------
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/**
* Constructor
*
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* @param DriverInterface $db
* @param QueryParser $parser
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*/
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public function __construct(DriverInterface $db, QueryParser $parser)
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{
// Inject driver and parser
$this->db = $db;
$this->parser = $parser;
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$this->queries['total_time'] = 0;
// Alias driver sql and util classes
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$this->sql = $this->db->getSql();
$this->util = $this->db->getUtil();
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}
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/**
* Destructor
* @codeCoverageIgnore
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*/
public function __destruct()
{
$this->db = NULL;
}
/**
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* Calls a function further down the inheritance chain
*
* @param string $name
* @param array $params
* @return mixed
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* @throws BadMethodCallException
*/
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public function __call(string $name, array $params)
{
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// Alias snake_case method calls
$camelName = \to_camel_case($name);
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foreach([$this, $this->db] as $object)
{
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foreach([$name, $camelName] as $methodName)
{
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if (method_exists($object, $methodName))
{
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return call_user_func_array([$object, $methodName], $params);
}
}
}
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throw new BadMethodCallException('Method does not exist');
}
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// --------------------------------------------------------------------------
// ! Select Queries
// --------------------------------------------------------------------------
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/**
* Specifies rows to select in a query
*
* @param string $fields
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* @return QueryBuilderInterface
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*/
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public function select(string $fields): QueryBuilderInterface
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{
// Split fields by comma
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$fieldsArray = explode(',', $fields);
$fieldsArray = array_map('mb_trim', $fieldsArray);
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// Split on 'As'
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foreach ($fieldsArray as $key => $field)
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{
if (stripos($field, 'as') !== FALSE)
{
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$fieldsArray[$key] = preg_split('` as `i', $field);
$fieldsArray[$key] = array_map('mb_trim', $fieldsArray[$key]);
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}
}
// Quote the identifiers
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$safeArray = $this->db->quoteIdent($fieldsArray);
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unset($fieldsArray);
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// Join the strings back together
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for($i = 0, $c = count($safeArray); $i < $c; $i++)
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{
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if (is_array($safeArray[$i]))
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{
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$safeArray[$i] = implode(' AS ', $safeArray[$i]);
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}
}
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$this->selectString .= implode(', ', $safeArray);
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unset($safeArray);
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return $this;
}
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/**
* Selects the maximum value of a field from a query
*
* @param string $field
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* @param string|bool $as
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* @return QueryBuilderInterface
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*/
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public function selectMax(string $field, $as=FALSE): QueryBuilderInterface
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{
// Create the select string
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$this->selectString .= ' MAX'.$this->_select($field, $as);
return $this;
}
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/**
* Selects the minimum value of a field from a query
*
* @param string $field
* @param string|bool $as
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* @return QueryBuilderInterface
*/
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public function selectMin(string $field, $as=FALSE): QueryBuilderInterface
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{
// Create the select string
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$this->selectString .= ' MIN'.$this->_select($field, $as);
return $this;
}
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/**
* Selects the average value of a field from a query
*
* @param string $field
* @param string|bool $as
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* @return QueryBuilderInterface
*/
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public function selectAvg(string $field, $as=FALSE): QueryBuilderInterface
{
// Create the select string
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$this->selectString .= ' AVG'.$this->_select($field, $as);
return $this;
}
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/**
* Selects the sum of a field from a query
*
* @param string $field
* @param string|bool $as
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* @return QueryBuilderInterface
*/
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public function selectSum(string $field, $as=FALSE): QueryBuilderInterface
{
// Create the select string
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$this->selectString .= ' SUM'.$this->_select($field, $as);
return $this;
}
/**
* Adds the 'distinct' keyword to a query
*
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* @return QueryBuilderInterface
*/
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public function distinct(): QueryBuilderInterface
{
// Prepend the keyword to the select string
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$this->selectString = ' DISTINCT '.$this->selectString;
return $this;
}
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/**
* Tell the database to give you the query plan instead of result set
*
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* @return QueryBuilderInterface
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*/
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public function explain(): QueryBuilderInterface
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{
$this->explain = TRUE;
return $this;
}
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/**
* Specify the database table to select from
*
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* @param string $tblname
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* @return QueryBuilderInterface
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*/
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public function from($tblname): QueryBuilderInterface
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{
// Split identifiers on spaces
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$identArray = explode(' ', \mb_trim($tblname));
$identArray = array_map('\\mb_trim', $identArray);
// Quote the identifiers
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$identArray[0] = $this->db->quoteTable($identArray[0]);
$identArray = $this->db->quoteIdent($identArray);
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// Paste it back together
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$this->fromString = implode(' ', $identArray);
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return $this;
}
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// --------------------------------------------------------------------------
// ! 'Like' methods
// --------------------------------------------------------------------------
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/**
* Creates a Like clause in the sql statement
*
* @param string $field
* @param mixed $val
* @param string $pos
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* @return QueryBuilderInterface
*/
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public function like($field, $val, $pos='both'): QueryBuilderInterface
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{
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return $this->_like($field, $val, $pos, 'LIKE', 'AND');
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}
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/**
* Generates an OR Like clause
*
* @param string $field
* @param mixed $val
* @param string $pos
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* @return QueryBuilderInterface
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*/
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public function orLike($field, $val, $pos='both'): QueryBuilderInterface
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{
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return $this->_like($field, $val, $pos, 'LIKE', 'OR');
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}
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/**
* Generates a NOT LIKE clause
*
* @param string $field
* @param mixed $val
* @param string $pos
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* @return QueryBuilderInterface
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*/
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public function notLike($field, $val, $pos='both'): QueryBuilderInterface
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{
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return $this->_like($field, $val, $pos, 'NOT LIKE', 'AND');
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}
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/**
* Generates a OR NOT LIKE clause
*
* @param string $field
* @param mixed $val
* @param string $pos
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* @return QueryBuilderInterface
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*/
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public function orNotLike($field, $val, $pos='both'): QueryBuilderInterface
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{
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return $this->_like($field, $val, $pos, 'NOT LIKE', 'OR');
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}
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// --------------------------------------------------------------------------
// ! Having methods
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// --------------------------------------------------------------------------
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/**
* Generates a 'Having' clause
*
* @param mixed $key
* @param mixed $val
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* @return QueryBuilderInterface
*/
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public function having($key, $val=[]): QueryBuilderInterface
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{
return $this->_having($key, $val, 'AND');
}
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/**
* Generates a 'Having' clause prefixed with 'OR'
*
* @param mixed $key
* @param mixed $val
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* @return QueryBuilderInterface
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*/
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public function orHaving($key, $val=[]): QueryBuilderInterface
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{
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return $this->_having($key, $val, 'OR');
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}
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// --------------------------------------------------------------------------
// ! 'Where' methods
// --------------------------------------------------------------------------
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/**
* Specify condition(s) in the where clause of a query
* Note: this function works with key / value, or a
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* passed array with key / value pairs
*
* @param mixed $key
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* @param mixed $val
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* @param mixed $escape
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* @return QueryBuilderInterface
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*/
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public function where($key, $val=[], $escape=NULL): QueryBuilderInterface
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{
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return $this->_whereString($key, $val, 'AND');
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}
/**
* Where clause prefixed with "OR"
*
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* @param string $key
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* @param mixed $val
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* @return QueryBuilderInterface
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*/
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public function orWhere($key, $val=[]): QueryBuilderInterface
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{
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return $this->_whereString($key, $val, 'OR');
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}
/**
* Where clause with 'IN' statement
*
* @param mixed $field
* @param mixed $val
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* @return QueryBuilderInterface
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*/
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public function whereIn($field, $val=[]): QueryBuilderInterface
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{
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return $this->_whereIn($field, $val);
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}
/**
* Where in statement prefixed with "or"
*
* @param string $field
* @param mixed $val
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* @return QueryBuilderInterface
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*/
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public function orWhereIn($field, $val=[]): QueryBuilderInterface
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{
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return $this->_whereIn($field, $val, 'IN', 'OR');
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}
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/**
* WHERE NOT IN (FOO) clause
*
* @param string $field
* @param mixed $val
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* @return QueryBuilderInterface
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*/
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public function whereNotIn($field, $val=[]): QueryBuilderInterface
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{
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return $this->_whereIn($field, $val, 'NOT IN', 'AND');
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}
/**
* OR WHERE NOT IN (FOO) clause
*
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* @param string $field
* @param mixed $val
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* @return QueryBuilderInterface
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*/
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public function orWhereNotIn($field, $val=[]): QueryBuilderInterface
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{
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return $this->_whereIn($field, $val, 'NOT IN', 'OR');
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}
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// --------------------------------------------------------------------------
// ! Other Query Modifier methods
// --------------------------------------------------------------------------
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/**
* Sets values for inserts / updates / deletes
*
* @param mixed $key
* @param mixed $val
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* @return QueryBuilderInterface
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*/
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public function set($key, $val = NULL): QueryBuilderInterface
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{
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$this->_mixedSet($this->setArrayKeys, $key, $val, self::KEY);
$this->_mixedSet($this->values, $key, $val, self::VALUE);
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// Use the keys of the array to make the insert/update string
// Escape the field names
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$this->setArrayKeys = array_map([$this->db, '_quote'], $this->setArrayKeys);
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// Generate the "set" string
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$this->setString = implode('=?,', $this->setArrayKeys);
$this->setString .= '=?';
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return $this;
}
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/**
* Creates a join phrase in a compiled query
*
* @param string $table
* @param string $condition
* @param string $type
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* @return QueryBuilderInterface
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*/
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public function join($table, $condition, $type=''): QueryBuilderInterface
{
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// Prefix and quote table name
$table = explode(' ', mb_trim($table));
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$table[0] = $this->db->quoteTable($table[0]);
$table = $this->db->quoteIdent($table);
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$table = implode(' ', $table);
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// Parse out the join condition
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$parsedCondition = $this->parser->compileJoin($condition);
$condition = $table . ' ON ' . $parsedCondition;
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$this->_appendMap("\n" . strtoupper($type) . ' JOIN ', $condition, 'join');
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return $this;
}
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/**
* Group the results by the selected field(s)
*
* @param mixed $field
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* @return QueryBuilderInterface
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*/
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public function groupBy($field): QueryBuilderInterface
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{
if ( ! is_scalar($field))
{
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$newGroupArray = array_map([$this->db, 'quoteIdent'], $field);
$this->groupArray = array_merge($this->groupArray, $newGroupArray);
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}
else
{
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$this->groupArray[] = $this->db->quoteIdent($field);
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}
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$this->groupString = ' GROUP BY ' . implode(',', $this->groupArray);
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return $this;
}
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/**
* Order the results by the selected field(s)
*
* @param string $field
* @param string $type
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* @return QueryBuilderInterface
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*/
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public function orderBy($field, $type=""): QueryBuilderInterface
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{
// When ordering by random, do an ascending order if the driver
// doesn't support random ordering
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if (stripos($type, 'rand') !== FALSE)
{
$rand = $this->sql->random();
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$type = $rand ?? 'ASC';
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}
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// Set fields for later manipulation
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$field = $this->db->quoteIdent($field);
$this->orderArray[$field] = $type;
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$orderClauses = [];
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// Flatten key/val pairs into an array of space-separated pairs
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foreach($this->orderArray as $k => $v)
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{
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$orderClauses[] = $k . ' ' . strtoupper($v);
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}
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// Set the final string
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$this->orderString = ( ! isset($rand))
? "\nORDER BY ".implode(', ', $orderClauses)
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: "\nORDER BY".$rand;
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return $this;
}
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/**
* Set a limit on the current sql statement
*
* @param int $limit
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* @param int|bool $offset
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* @return QueryBuilderInterface
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*/
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public function limit($limit, $offset=FALSE): QueryBuilderInterface
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{
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$this->limit = (int) $limit;
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$this->offset = $offset;
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return $this;
}
// --------------------------------------------------------------------------
// ! Query Grouping Methods
// --------------------------------------------------------------------------
/**
* Adds a paren to the current query for query grouping
*
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* @return QueryBuilderInterface
*/
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public function groupStart(): QueryBuilderInterface
{
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$conj = (empty($this->queryMap)) ? ' WHERE ' : ' ';
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$this->_appendMap($conj, '(', 'group_start');
return $this;
}
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/**
* Adds a paren to the current query for query grouping,
* prefixed with 'NOT'
*
* @return QueryBuilderInterface
*/
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public function notGroupStart(): QueryBuilderInterface
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{
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$conj = (empty($this->queryMap)) ? ' WHERE ' : ' AND ';
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$this->_appendMap($conj, ' NOT (', 'group_start');
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return $this;
}
/**
* Adds a paren to the current query for query grouping,
* prefixed with 'OR'
*
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* @return QueryBuilderInterface
*/
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public function orGroupStart(): QueryBuilderInterface
{
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$this->_appendMap('', ' OR (', 'group_start');
return $this;
}
/**
* Adds a paren to the current query for query grouping,
* prefixed with 'OR NOT'
*
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* @return QueryBuilderInterface
*/
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public function orNotGroupStart(): QueryBuilderInterface
{
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$this->_appendMap('', ' OR NOT (', 'group_start');
return $this;
}
/**
* Ends a query group
*
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* @return QueryBuilderInterface
*/
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public function groupEnd(): QueryBuilderInterface
{
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$this->_appendMap('', ')', 'group_end');
return $this;
}
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// --------------------------------------------------------------------------
// ! Query execution methods
// --------------------------------------------------------------------------
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/**
* Select and retrieve all records from the current table, and/or
* execute current compiled query
*
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* @param string $table
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* @param int|bool $limit
* @param int|bool $offset
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* @return PDOStatement
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*/
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public function get($table='', $limit=FALSE, $offset=FALSE): PDOStatement
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{
// Set the table
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if ( ! empty($table))
{
$this->from($table);
}
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// Set the limit, if it exists
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if (is_int($limit))
{
$this->limit($limit, $offset);
}
return $this->_run("get", $table);
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}
/**
* Convenience method for get() with a where clause
*
* @param string $table
* @param array $where
* @param int|bool $limit
* @param int|bool $offset
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* @return PDOStatement
*/
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public function getWhere($table, $where=[], $limit=FALSE, $offset=FALSE): PDOStatement
{
// Create the where clause
$this->where($where);
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// Return the result
return $this->get($table, $limit, $offset);
}
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/**
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* Retrieve the number of rows in the selected table
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*
* @param string $table
* @return int
*/
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public function countAll($table): int
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{
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$sql = 'SELECT * FROM '.$this->db->quoteTable($table);
$res = $this->db->query($sql);
return (int) count($res->fetchAll());
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}
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/**
* Retrieve the number of results for the generated query - used
* in place of the get() method
*
* @param string $table
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* @param boolean $reset
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* @return int
*/
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public function countAllResults(string $table='', bool $reset = TRUE): int
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{
// Set the table
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if ( ! empty($table))
{
$this->from($table);
}
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$result = $this->_run('get', $table, NULL, NULL, $reset);
$rows = $result->fetchAll();
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return (int) count($rows);
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}
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/**
* Creates an insert clause, and executes it
*
* @param string $table
* @param mixed $data
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* @return PDOStatement
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*/
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public function insert($table, $data=[]): PDOStatement
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{
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if ( ! empty($data))
{
$this->set($data);
}
return $this->_run("insert", $table);
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}
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/**
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* Creates and executes a batch insertion query
*
* @param string $table
* @param array $data
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* @return PDOStatement
*/
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public function insertBatch($table, $data=[]): PDOStatement
{
// Get the generated values and sql string
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list($sql, $data) = $this->db->insertBatch($table, $data);
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return ( ! is_null($sql))
? $this->_run('', $table, $sql, $data)
: NULL;
}
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/**
* Creates an update clause, and executes it
*
* @param string $table
* @param mixed $data
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* @return PDOStatement
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*/
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public function update($table, $data=[]): PDOStatement
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{
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if ( ! empty($data))
{
$this->set($data);
}
return $this->_run("update", $table);
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}
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/**
* Creates a batch update, and executes it.
* Returns the number of affected rows
*
* @param string $table
* @param array|object $data
* @param string $where
* @return int|null
*/
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public function updateBatch($table, $data, $where)
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{
// Get the generated values and sql string
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list($sql, $data) = $this->db->updateBatch($table, $data, $where);
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return ( ! is_null($sql))
? $this->_run('', $table, $sql, $data)
: NULL;
}
/**
* Insertion with automatic overwrite, rather than attempted duplication
*
* @param string $table
* @param array $data
* @return \PDOStatement|null
*/
public function replace($table, $data=[])
{
if ( ! empty($data))
{
$this->set($data);
}
return $this->_run("replace", $table);
}
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/**
* Deletes data from a table
*
* @param string $table
* @param mixed $where
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* @return PDOStatement
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*/
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public function delete($table, $where=''): PDOStatement
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{
// Set the where clause
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if ( ! empty($where))
{
$this->where($where);
}
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return $this->_run("delete", $table);
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}
// --------------------------------------------------------------------------
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// ! SQL Returning Methods
// --------------------------------------------------------------------------
/**
* Returns the generated 'select' sql query
*
* @param string $table
* @param bool $reset
* @return string
*/
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public function getCompiledSelect(string $table='', bool $reset=TRUE): string
{
// Set the table
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if ( ! empty($table))
{
$this->from($table);
}
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return $this->_getCompile('select', $table, $reset);
}
/**
* Returns the generated 'insert' sql query
*
* @param string $table
* @param bool $reset
* @return string
*/
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public function getCompiledInsert(string $table, bool $reset=TRUE): string
{
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return $this->_getCompile('insert', $table, $reset);
}
/**
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* Returns the generated 'update' sql query
*
* @param string $table
* @param bool $reset
* @return string
*/
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public function getCompiledUpdate(string $table='', bool $reset=TRUE): string
{
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return $this->_getCompile('update', $table, $reset);
}
/**
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* Returns the generated 'delete' sql query
*
* @param string $table
* @param bool $reset
* @return string
*/
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public function getCompiledDelete(string $table='', bool $reset=TRUE): string
{
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return $this->_getCompile('delete', $table, $reset);
}
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// --------------------------------------------------------------------------
// ! Miscellaneous Methods
// --------------------------------------------------------------------------
/**
* Clear out the class variables, so the next query can be run
*
* @return void
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*/
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public function resetQuery()
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{
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// Reset strings and booleans
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foreach($this->stringVars as $var)
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{
$this->$var = NULL;
}
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// Reset arrays
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foreach($this->arrayVars as $var)
{
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$this->$var = [];
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}
}
}
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// End of query_builder.php