<?php
/**
* CodeIgniter
*
* An open source application development framework for PHP
*
* This content is released under the MIT License (MIT)
*
* Copyright (c) 2014-2019 British Columbia Institute of Technology
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* @package CodeIgniter
* @author CodeIgniter Dev Team
* @copyright 2014-2019 British Columbia Institute of Technology (https://bcit.ca/)
* @license https://opensource.org/licenses/MIT MIT License
* @link https://codeigniter.com
* @since Version 4.0.0
* @filesource
*/
namespace CodeIgniter\Database;
use CodeIgniter\Database\Exceptions\DatabaseException;
use CodeIgniter\Database\Exceptions\DataException;
use Closure;
/**
* Class BaseBuilder
*
* Provides the core Query Builder methods.
* Database-specific Builders might need to override
* certain methods to make them work.
*
* @package CodeIgniter\Database
* @mixin \CodeIgniter\Model
*/
class BaseBuilder
{
/**
* Reset DELETE data flag
*
* @var boolean
*/
protected $resetDeleteData = false;
/**
* QB SELECT data
*
* @var array
*/
protected $QBSelect = [];
/**
* QB DISTINCT flag
*
* @var boolean
*/
protected $QBDistinct = false;
/**
* QB FROM data
*
* @var array
*/
protected $QBFrom = [];
/**
* QB JOIN data
*
* @var array
*/
protected $QBJoin = [];
/**
* QB WHERE data
*
* @var array
*/
protected $QBWhere = [];
/**
* QB GROUP BY data
*
* @var array
*/
protected $QBGroupBy = [];
/**
* QB HAVING data
*
* @var array
*/
protected $QBHaving = [];
/**
* QB keys
*
* @var array
*/
protected $QBKeys = [];
/**
* QB LIMIT data
*
* @var integer
*/
protected $QBLimit = false;
/**
* QB OFFSET data
*
* @var integer
*/
protected $QBOffset = false;
/**
* QB ORDER BY data
*
* @var array
*/
public $QBOrderBy = [];
/**
* QB NO ESCAPE data
*
* @var array
*/
public $QBNoEscape = [];
/**
* QB data sets
*
* @var array
*/
protected $QBSet = [];
/**
* QB WHERE group started flag
*
* @var boolean
*/
protected $QBWhereGroupStarted = false;
/**
* QB WHERE group count
*
* @var integer
*/
protected $QBWhereGroupCount = 0;
/**
* A reference to the database connection.
*
* @var BaseConnection
*/
protected $db;
/**
* ORDER BY random keyword
*
* @var array
*/
protected $randomKeyword = [
'RAND()',
'RAND(%d)',
];
/**
* COUNT string
*
* @used-by CI_DB_driver::count_all()
* @used-by BaseBuilder::count_all_results()
*
* @var string
*/
protected $countString = 'SELECT COUNT(*) AS ';
/**
* Collects the named parameters and
* their values for later binding
* in the Query object.
*
* @var array
*/
protected $binds = [];
/**
* Some databases, like SQLite, do not by default
* allow limiting of delete clauses.
*
* @var boolean
*/
protected $canLimitDeletes = true;
/**
* Some databases do not by default
* allow limit update queries with WHERE.
*
* @var boolean
*/
protected $canLimitWhereUpdates = true;
//--------------------------------------------------------------------
/**
* Constructor
*
* @param string|array $tableName
* @param \CodeIgniter\Database\ConnectionInterface $db
* @param array $options
* @throws DatabaseException
*/
public function __construct($tableName, ConnectionInterface &$db, array $options = null)
{
if (empty($tableName))
{
throw new DatabaseException('A table must be specified when creating a new Query Builder.');
}
$this->db = $db;
$this->from($tableName);
if (! empty($options))
{
foreach ($options as $key => $value)
{
if (property_exists($this, $key))
{
$this->$key = $value;
}
}
}
}
//--------------------------------------------------------------------
/**
* Returns an array of bind values and their
* named parameters for binding in the Query object later.
*
* @return array
*/
public function getBinds(): array
{
return $this->binds;
}
//--------------------------------------------------------------------
/**
* Select
*
* Generates the SELECT portion of the query
*
* @param string|array $select
* @param boolean $escape
*
* @return BaseBuilder
*/
public function select($select = '*', bool $escape = null)
{
if (is_string($select))
{
$select = explode(',', $select);
}
// If the escape value was not set, we will base it on the global setting
is_bool($escape) || $escape = $this->db->protectIdentifiers;
foreach ($select as $val)
{
$val = trim($val);
if ($val !== '')
{
$this->QBSelect[] = $val;
/*
* When doing 'SELECT NULL as field_alias FROM table'
* null gets taken as a field, and therefore escaped
* with backticks.
* This prevents NULL being escaped
* @see https://github.com/codeigniter4/CodeIgniter4/issues/1169
*/
if (strtoupper(mb_substr(trim($val), 0, 4)) === 'NULL')
{
$escape = false;
}
$this->QBNoEscape[] = $escape;
}
}
return $this;
}
//--------------------------------------------------------------------
/**
* Select Max
*
* Generates a SELECT MAX(field) portion of a query
*
* @param string $select The field
* @param string $alias An alias
*
* @return BaseBuilder
*/
public function selectMax(string $select = '', string $alias = '')
{
return $this->maxMinAvgSum($select, $alias, 'MAX');
}
//--------------------------------------------------------------------
/**
* Select Min
*
* Generates a SELECT MIN(field) portion of a query
*
* @param string $select The field
* @param string $alias An alias
*
* @return BaseBuilder
*/
public function selectMin(string $select = '', string $alias = '')
{
return $this->maxMinAvgSum($select, $alias, 'MIN');
}
//--------------------------------------------------------------------
/**
* Select Average
*
* Generates a SELECT AVG(field) portion of a query
*
* @param string $select The field
* @param string $alias An alias
*
* @return BaseBuilder
*/
public function selectAvg(string $select = '', string $alias = '')
{
return $this->maxMinAvgSum($select, $alias, 'AVG');
}
//--------------------------------------------------------------------
/**
* Select Sum
*
* Generates a SELECT SUM(field) portion of a query
*
* @param string $select The field
* @param string $alias An alias
*
* @return BaseBuilder
*/
public function selectSum(string $select = '', string $alias = '')
{
return $this->maxMinAvgSum($select, $alias, 'SUM');
}
//--------------------------------------------------------------------
/**
* Select Count
*
* Generates a SELECT COUNT(field) portion of a query
*
* @param string $select The field
* @param string $alias An alias
*
* @return BaseBuilder
*/
public function selectCount(string $select = '', string $alias = '')
{
return $this->maxMinAvgSum($select, $alias, 'COUNT');
}
//--------------------------------------------------------------------
/**
* SELECT [MAX|MIN|AVG|SUM|COUNT]()
*
* @used-by selectMax()
* @used-by selectMin()
* @used-by selectAvg()
* @used-by selectSum()
*
* @param string $select Field name
* @param string $alias
* @param string $type
*
* @return BaseBuilder
* @throws \CodeIgniter\Database\Exceptions\DataException
* @throws \CodeIgniter\Database\Exceptions\DatabaseException
*/
protected function maxMinAvgSum(string $select = '', string $alias = '', string $type = 'MAX')
{
if ($select === '')
{
throw DataException::forEmptyInputGiven('Select');
}
if (strpos($select, ',') !== false)
{
throw DataException::forInvalidArgument('column name not separated by comma');
}
$type = strtoupper($type);
if (! in_array($type, ['MAX', 'MIN', 'AVG', 'SUM', 'COUNT']))
{
throw new DatabaseException('Invalid function type: ' . $type);
}
if ($alias === '')
{
$alias = $this->createAliasFromTable(trim($select));
}
$sql = $type . '(' . $this->db->protectIdentifiers(trim($select)) . ') AS ' . $this->db->escapeIdentifiers(trim($alias));
$this->QBSelect[] = $sql;
$this->QBNoEscape[] = null;
return $this;
}
//--------------------------------------------------------------------
/**
* Determines the alias name based on the table
*
* @param string $item
*
* @return string
*/
protected function createAliasFromTable(string $item): string
{
if (strpos($item, '.') !== false)
{
$item = explode('.', $item);
return end($item);
}
return $item;
}
//--------------------------------------------------------------------
/**
* DISTINCT
*
* Sets a flag which tells the query string compiler to add DISTINCT
*
* @param boolean $val
*
* @return BaseBuilder
*/
public function distinct(bool $val = true)
{
$this->QBDistinct = $val;
return $this;
}
//--------------------------------------------------------------------
/**
* From
*
* Generates the FROM portion of the query
*
* @param mixed $from can be a string or array
* @param boolean $overwrite Should we remove the first table existing?
*
* @return BaseBuilder
*/
public function from($from, bool $overwrite = false)
{
if ($overwrite === true)
{
$this->QBFrom = [];
$this->db->setAliasedTables([]);
}
foreach ((array) $from as $val)
{
if (strpos($val, ',') !== false)
{
foreach (explode(',', $val) as $v)
{
$v = trim($v);
$this->trackAliases($v);
$this->QBFrom[] = $v = $this->db->protectIdentifiers($v, true, null, false);
}
}
else
{
$val = trim($val);
// Extract any aliases that might exist. We use this information
// in the protectIdentifiers to know whether to add a table prefix
$this->trackAliases($val);
$this->QBFrom[] = $this->db->protectIdentifiers($val, true, null, false);
}
}
return $this;
}
//--------------------------------------------------------------------
/**
* JOIN
*
* Generates the JOIN portion of the query
*
* @param string $table
* @param string $cond The join condition
* @param string $type The type of join
* @param boolean $escape Whether not to try to escape identifiers
*
* @return BaseBuilder
*/
public function join(string $table, string $cond, string $type = '', bool $escape = null)
{
if ($type !== '')
{
$type = strtoupper(trim($type));
if (! in_array($type, ['LEFT', 'RIGHT', 'OUTER', 'INNER', 'LEFT OUTER', 'RIGHT OUTER'], true))
{
$type = '';
}
else
{
$type .= ' ';
}
}
// Extract any aliases that might exist. We use this information
// in the protectIdentifiers to know whether to add a table prefix
$this->trackAliases($table);
is_bool($escape) || $escape = $this->db->protectIdentifiers;
if (! $this->hasOperator($cond))
{
$cond = ' USING (' . ($escape ? $this->db->escapeIdentifiers($cond) : $cond) . ')';
}
elseif ($escape === false)
{
$cond = ' ON ' . $cond;
}
else
{
// Split multiple conditions
if (preg_match_all('/\sAND\s|\sOR\s/i', $cond, $joints, PREG_OFFSET_CAPTURE))
{
$conditions = [];
$joints = $joints[0];
array_unshift($joints, ['', 0]);
for ($i = count($joints) - 1, $pos = strlen($cond); $i >= 0; $i --)
{
$joints[$i][1] += strlen($joints[$i][0]); // offset
$conditions[$i] = substr($cond, $joints[$i][1], $pos - $joints[$i][1]);
$pos = $joints[$i][1] - strlen($joints[$i][0]);
$joints[$i] = $joints[$i][0];
}
}
else
{
$conditions = [$cond];
$joints = [''];
}
$cond = ' ON ';
for ($i = 0, $c = count($conditions); $i < $c; $i ++)
{
$operator = $this->getOperator($conditions[$i]);
$cond .= $joints[$i];
$cond .= preg_match("/(\(*)?([\[\]\w\.'-]+)" . preg_quote($operator) . '(.*)/i', $conditions[$i], $match) ? $match[1] . $this->db->protectIdentifiers($match[2]) . $operator . $this->db->protectIdentifiers($match[3]) : $conditions[$i];
}
}
// Do we want to escape the table name?
if ($escape === true)
{
$table = $this->db->protectIdentifiers($table, true, null, false);
}
// Assemble the JOIN statement
$this->QBJoin[] = $join = $type . 'JOIN ' . $table . $cond;
return $this;
}
//--------------------------------------------------------------------
/**
* WHERE
*
* Generates the WHERE portion of the query.
* Separates multiple calls with 'AND'.
*
* @param mixed $key
* @param mixed $value
* @param boolean $escape
*
* @return BaseBuilder
*/
public function where($key, $value = null, bool $escape = null)
{
return $this->whereHaving('QBWhere', $key, $value, 'AND ', $escape);
}
//--------------------------------------------------------------------
/**
* OR WHERE
*
* Generates the WHERE portion of the query.
* Separates multiple calls with 'OR'.
*
* @param mixed $key
* @param mixed $value
* @param boolean $escape
*
* @return BaseBuilder
*/
public function orWhere($key, $value = null, bool $escape = null)
{
return $this->whereHaving('QBWhere', $key, $value, 'OR ', $escape);
}
//--------------------------------------------------------------------
/**
* WHERE, HAVING
*
* @used-by where()
* @used-by orWhere()
* @used-by having()
* @used-by orHaving()
*
* @param string $qb_key 'QBWhere' or 'QBHaving'
* @param mixed $key
* @param mixed $value
* @param string $type
* @param boolean $escape
*
* @return BaseBuilder
*/
protected function whereHaving(string $qb_key, $key, $value = null, string $type = 'AND ', bool $escape = null)
{
if (! is_array($key))
{
$key = [$key => $value];
}
// If the escape value was not set will base it on the global setting
is_bool($escape) || $escape = $this->db->protectIdentifiers;
foreach ($key as $k => $v)
{
$prefix = empty($this->$qb_key) ? $this->groupGetType('') : $this->groupGetType($type);
if ($v !== null)
{
$op = $this->getOperator($k, true);
if (! empty($op))
{
$k = trim($k);
end($op);
$op = trim(current($op));
if (substr($k, -1 * strlen($op)) === $op)
{
$k = rtrim(strrev(preg_replace(strrev('/' . $op . '/'), strrev(''), strrev($k), 1)));
}
}
$bind = $this->setBind($k, $v, $escape);
if (empty($op))
{
$k .= ' =';
}
else
{
$k .= " $op";
}
if ($v instanceof Closure)
{
$builder = $this->cleanClone();
$v = '(' . str_replace("\n", ' ', $v($builder)->getCompiledSelect()) . ')';
}
else
{
$v = " :$bind:";
}
}
elseif (! $this->hasOperator($k) && $qb_key !== 'QBHaving')
{
// value appears not to have been set, assign the test to IS NULL
$k .= ' IS NULL';
}
elseif (preg_match('/\s*(!?=|<>|IS(?:\s+NOT)?)\s*$/i', $k, $match, PREG_OFFSET_CAPTURE))
{
$k = substr($k, 0, $match[0][1]) . ($match[1][0] === '=' ? ' IS NULL' : ' IS NOT NULL');
}
$this->{$qb_key}[] = [
'condition' => $prefix . $k . $v,
'escape' => $escape,
];
}
return $this;
}
//--------------------------------------------------------------------
/**
* WHERE IN
*
* Generates a WHERE field IN('item', 'item') SQL query,
* joined with 'AND' if appropriate.
*
* @param string $key The field to search
* @param array|string|Closure $values The values searched on, or anonymous function with subquery
* @param boolean $escape
*
* @return BaseBuilder
*/
public function whereIn(string $key = null, $values = null, bool $escape = null)
{
return $this->_whereIn($key, $values, false, 'AND ', $escape);
}
//--------------------------------------------------------------------
/**
* OR WHERE IN
*
* Generates a WHERE field IN('item', 'item') SQL query,
* joined with 'OR' if appropriate.
*
* @param string $key The field to search
* @param array|string|Closure $values The values searched on, or anonymous function with subquery
* @param boolean $escape
*
* @return BaseBuilder
*/
public function orWhereIn(string $key = null, $values = null, bool $escape = null)
{
return $this->_whereIn($key, $values, false, 'OR ', $escape);
}
//--------------------------------------------------------------------
/**
* WHERE NOT IN
*
* Generates a WHERE field NOT IN('item', 'item') SQL query,
* joined with 'AND' if appropriate.
*
* @param string $key The field to search
* @param array|string|Closure $values The values searched on, or anonymous function with subquery
* @param boolean $escape
*
* @return BaseBuilder
*/
public function whereNotIn(string $key = null, $values = null, bool $escape = null)
{
return $this->_whereIn($key, $values, true, 'AND ', $escape);
}
//--------------------------------------------------------------------
/**
* OR WHERE NOT IN
*
* Generates a WHERE field NOT IN('item', 'item') SQL query,
* joined with 'OR' if appropriate.
*
* @param string $key The field to search
* @param array|string|Closure $values The values searched on, or anonymous function with subquery
* @param boolean $escape
*
* @return BaseBuilder
*/
public function orWhereNotIn(string $key = null, $values = null, bool $escape = null)
{
return $this->_whereIn($key, $values, true, 'OR ', $escape);
}
//--------------------------------------------------------------------
/**
* Internal WHERE IN
*
* @used-by WhereIn()
* @used-by orWhereIn()
* @used-by whereNotIn()
* @used-by orWhereNotIn()
*
* @param string $key The field to search
* @param array|Closure $values The values searched on, or anonymous function with subquery
* @param boolean $not If the statement would be IN or NOT IN
* @param string $type
* @param boolean $escape
*
* @return BaseBuilder
*/
protected function _whereIn(string $key = null, $values = null, bool $not = false, string $type = 'AND ', bool $escape = null)
{
if ($key === null || $values === null || (! is_array($values) && ! ($values instanceof Closure)))
{
return $this;
}
is_bool($escape) || $escape = $this->db->protectIdentifiers;
$ok = $key;
if ($escape === true)
{
$key = $this->db->protectIdentifiers($key);
}
$not = ($not) ? ' NOT' : '';
if ($values instanceof Closure)
{
$builder = $this->cleanClone();
$ok = str_replace("\n", ' ', $values($builder)->getCompiledSelect());
}
else
{
$whereIn = is_array($values) ? array_values($values) : $values;
$ok = $this->setBind($ok, $whereIn, $escape);
}
$prefix = empty($this->QBWhere) ? $this->groupGetType('') : $this->groupGetType($type);
$whereIn = [
'condition' => $prefix . $key . $not . ($values instanceof Closure ? " IN ($ok)" : " IN :{$ok}:"),
'escape' => false,
];
$this->QBWhere[] = $whereIn;
return $this;
}
//--------------------------------------------------------------------
/**
* LIKE
*
* Generates a %LIKE% portion of the query.
* Separates multiple calls with 'AND'.
*
* @param mixed $field
* @param string $match
* @param string $side
* @param boolean $escape
* @param boolean $insensitiveSearch IF true, will force a case-insensitive search
*
* @return BaseBuilder
*/
public function like($field, string $match = '', string $side = 'both', bool $escape = null, bool $insensitiveSearch = false)
{
return $this->_like($field, $match, 'AND ', $side, '', $escape, $insensitiveSearch);
}
//--------------------------------------------------------------------
/**
* NOT LIKE
*
* Generates a NOT LIKE portion of the query.
* Separates multiple calls with 'AND'.
*
* @param mixed $field
* @param string $match
* @param string $side
* @param boolean $escape
* @param boolean $insensitiveSearch IF true, will force a case-insensitive search
*
* @return BaseBuilder
*/
public function notLike($field, string $match = '', string $side = 'both', bool $escape = null, bool $insensitiveSearch = false)
{
return $this->_like($field, $match, 'AND ', $side, 'NOT', $escape, $insensitiveSearch);
}
//--------------------------------------------------------------------
/**
* OR LIKE
*
* Generates a %LIKE% portion of the query.
* Separates multiple calls with 'OR'.
*
* @param mixed $field
* @param string $match
* @param string $side
* @param boolean $escape
* @param boolean $insensitiveSearch IF true, will force a case-insensitive search
*
* @return BaseBuilder
*/
public function orLike($field, string $match = '', string $side = 'both', bool $escape = null, bool $insensitiveSearch = false)
{
return $this->_like($field, $match, 'OR ', $side, '', $escape, $insensitiveSearch);
}
//--------------------------------------------------------------------
/**
* OR NOT LIKE
*
* Generates a NOT LIKE portion of the query.
* Separates multiple calls with 'OR'.
*
* @param mixed $field
* @param string $match
* @param string $side
* @param boolean $escape
* @param boolean $insensitiveSearch IF true, will force a case-insensitive search
*
* @return BaseBuilder
*/
public function orNotLike($field, string $match = '', string $side = 'both', bool $escape = null, bool $insensitiveSearch = false)
{
return $this->_like($field, $match, 'OR ', $side, 'NOT', $escape, $insensitiveSearch);
}
//--------------------------------------------------------------------
/**
* Internal LIKE
*
* @used-by like()
* @used-by orLike()
* @used-by notLike()
* @used-by orNotLike()
*
* @param mixed $field
* @param string $match
* @param string $type
* @param string $side
* @param string $not
* @param boolean $escape
* @param boolean $insensitiveSearch IF true, will force a case-insensitive search
*
* @return BaseBuilder
*/
protected function _like($field, string $match = '', string $type = 'AND ', string $side = 'both', string $not = '', bool $escape = null, bool $insensitiveSearch = false)
{
if (! is_array($field))
{
$field = [$field => $match];
}
$escape = is_bool($escape) ? $escape : $this->db->protectIdentifiers;
// lowercase $side in case somebody writes e.g. 'BEFORE' instead of 'before' (doh)
$side = strtolower($side);
foreach ($field as $k => $v)
{
$prefix = empty($this->QBWhere) ? $this->groupGetType('') : $this->groupGetType($type);
if ($insensitiveSearch === true)
{
$v = strtolower($v);
}
if ($side === 'none')
{
$bind = $this->setBind($k, $v, $escape);
}
elseif ($side === 'before')
{
$bind = $this->setBind($k, "%$v", $escape);
}
elseif ($side === 'after')
{
$bind = $this->setBind($k, "$v%", $escape);
}
else
{
$bind = $this->setBind($k, "%$v%", $escape);
}
$like_statement = $this->_like_statement($prefix, $k, $not, $bind, $insensitiveSearch);
// some platforms require an escape sequence definition for LIKE wildcards
if ($escape === true && $this->db->likeEscapeStr !== '')
{
$like_statement .= sprintf($this->db->likeEscapeStr, $this->db->likeEscapeChar);
}
$this->QBWhere[] = [
'condition' => $like_statement,
'escape' => $escape,
];
}
return $this;
}
//--------------------------------------------------------------------
/**
* Platform independent LIKE statement builder.
*
* @param string $prefix
* @param string $column
* @param string $not
* @param string $bind
* @param boolean $insensitiveSearch
*
* @return string $like_statement
*/
protected function _like_statement(string $prefix = null, string $column, string $not = null, string $bind, bool $insensitiveSearch = false): string
{
$like_statement = "{$prefix} {$column} {$not} LIKE :{$bind}:";
if ($insensitiveSearch === true)
{
$like_statement = "{$prefix} LOWER({$column}) {$not} LIKE :{$bind}:";
}
return $like_statement;
}
//--------------------------------------------------------------------
/**
* Starts a query group.
*
* @param string $not (Internal use only)
* @param string $type (Internal use only)
*
* @return BaseBuilder
*/
public function groupStart(string $not = '', string $type = 'AND ')
{
$type = $this->groupGetType($type);
$this->QBWhereGroupStarted = true;
$prefix = empty($this->QBWhere) ? '' : $type;
$where = [
'condition' => $prefix . $not . str_repeat(' ', ++ $this->QBWhereGroupCount) . ' (',
'escape' => false,
];
$this->QBWhere[] = $where;
return $this;
}
//--------------------------------------------------------------------
/**
* Starts a query group, but ORs the group
*
* @return BaseBuilder
*/
public function orGroupStart()
{
return $this->groupStart('', 'OR ');
}
//--------------------------------------------------------------------
/**
* Starts a query group, but NOTs the group
*
* @return BaseBuilder
*/
public function notGroupStart()
{
return $this->groupStart('NOT ', 'AND ');
}
//--------------------------------------------------------------------
/**
* Starts a query group, but OR NOTs the group
*
* @return BaseBuilder
*/
public function orNotGroupStart()
{
return $this->groupStart('NOT ', 'OR ');
}
//--------------------------------------------------------------------
/**
* Ends a query group
*
* @return BaseBuilder
*/
public function groupEnd()
{
$this->QBWhereGroupStarted = false;
$where = [
'condition' => str_repeat(' ', $this->QBWhereGroupCount -- ) . ')',
'escape' => false,
];
$this->QBWhere[] = $where;
return $this;
}
//--------------------------------------------------------------------
/**
* Group_get_type
*
* @used-by groupStart()
* @used-by _like()
* @used-by whereHaving()
* @used-by _whereIn()
*
* @param string $type
*
* @return string
*/
protected function groupGetType(string $type): string
{
if ($this->QBWhereGroupStarted)
{
$type = '';
$this->QBWhereGroupStarted = false;
}
return $type;
}
//--------------------------------------------------------------------
/**
* GROUP BY
*
* @param string|array $by
* @param boolean $escape
*
* @return BaseBuilder
*/
public function groupBy($by, bool $escape = null)
{
is_bool($escape) || $escape = $this->db->protectIdentifiers;
if (is_string($by))
{
$by = ($escape === true) ? explode(',', $by) : [$by];
}
foreach ($by as $val)
{
$val = trim($val);
if ($val !== '')
{
$val = [
'field' => $val,
'escape' => $escape,
];
$this->QBGroupBy[] = $val;
}
}
return $this;
}
//--------------------------------------------------------------------
/**
* HAVING
*
* Separates multiple calls with 'AND'.
*
* @param string|array $key
* @param mixed $value
* @param boolean $escape
*
* @return BaseBuilder
*/
public function having($key, $value = null, bool $escape = null)
{
return $this->whereHaving('QBHaving', $key, $value, 'AND ', $escape);
}
//--------------------------------------------------------------------
/**
* OR HAVING
*
* Separates multiple calls with 'OR'.
*
* @param string|array $key
* @param mixed $value
* @param boolean $escape
*
* @return BaseBuilder
*/
public function orHaving($key, $value = null, bool $escape = null)
{
return $this->whereHaving('QBHaving', $key, $value, 'OR ', $escape);
}
//--------------------------------------------------------------------
/**
* ORDER BY
*
* @param string $orderBy
* @param string $direction ASC, DESC or RANDOM
* @param boolean $escape
*
* @return BaseBuilder
*/
public function orderBy(string $orderBy, string $direction = '', bool $escape = null)
{
$direction = strtoupper(trim($direction));
if ($direction === 'RANDOM')
{
$direction = '';
// Do we have a seed value?
$orderBy = ctype_digit((string) $orderBy) ? sprintf($this->randomKeyword[1], $orderBy) : $this->randomKeyword[0];
}
elseif (empty($orderBy))
{
return $this;
}
elseif ($direction !== '')
{
$direction = in_array($direction, ['ASC', 'DESC'], true) ? ' ' . $direction : '';
}
is_bool($escape) || $escape = $this->db->protectIdentifiers;
if ($escape === false)
{
$qb_orderBy[] = [
'field' => $orderBy,
'direction' => $direction,
'escape' => false,
];
}
else
{
$qb_orderBy = [];
foreach (explode(',', $orderBy) as $field)
{
$qb_orderBy[] = ($direction === '' && preg_match('/\s+(ASC|DESC)$/i', rtrim($field), $match, PREG_OFFSET_CAPTURE))
?
[
'field' => ltrim(substr($field, 0, $match[0][1])),
'direction' => ' ' . $match[1][0],
'escape' => true,
]
:
[
'field' => trim($field),
'direction' => $direction,
'escape' => true,
];
}
}
$this->QBOrderBy = array_merge($this->QBOrderBy, $qb_orderBy);
return $this;
}
//--------------------------------------------------------------------
/**
* LIMIT
*
* @param integer $value LIMIT value
* @param integer $offset OFFSET value
*
* @return BaseBuilder
*/
public function limit(int $value = null, ?int $offset = 0)
{
if (! is_null($value))
{
$this->QBLimit = $value;
}
if (! empty($offset))
{
$this->QBOffset = $offset;
}
return $this;
}
//--------------------------------------------------------------------
/**
* Sets the OFFSET value
*
* @param integer $offset OFFSET value
*
* @return BaseBuilder
*/
public function offset(int $offset)
{
if (! empty($offset))
{
$this->QBOffset = (int) $offset;
}
return $this;
}
//--------------------------------------------------------------------
/**
* LIMIT string
*
* Generates a platform-specific LIMIT clause.
*
* @param string $sql SQL Query
*
* @return string
*/
protected function _limit(string $sql): string
{
return $sql . ' LIMIT ' . ($this->QBOffset ? $this->QBOffset . ', ' : '') . $this->QBLimit;
}
//--------------------------------------------------------------------
/**
* The "set" function.
*
* Allows key/value pairs to be set for insert(), update() or replace().
*
* @param string|array|object $key Field name, or an array of field/value pairs
* @param string $value Field value, if $key is a single field
* @param boolean $escape Whether to escape values and identifiers
*
* @return BaseBuilder
*/
public function set($key, ?string $value = '', bool $escape = null)
{
$key = $this->objectToArray($key);
if (! is_array($key))
{
$key = [$key => $value];
}
$escape = is_bool($escape) ? $escape : $this->db->protectIdentifiers;
foreach ($key as $k => $v)
{
if ($escape)
{
$bind = $this->setBind($k, $v, $escape);
$this->QBSet[$this->db->protectIdentifiers($k, false, $escape)] = ":$bind:";
}
else
{
$this->QBSet[$this->db->protectIdentifiers($k, false, $escape)] = $v;
}
}
return $this;
}
//--------------------------------------------------------------------
/**
* Returns the previously set() data, alternatively resetting it
* if needed.
*
* @param boolean $clean
*
* @return array
*/
public function getSetData(bool $clean = false): array
{
$data = $this->QBSet;
if ($clean)
{
$this->QBSet = [];
}
return $data;
}
//--------------------------------------------------------------------
/**
* Get SELECT query string
*
* Compiles a SELECT query string and returns the sql.
*
* @param boolean $reset TRUE: resets QB values; FALSE: leave QB values alone
*
* @return string
*/
public function getCompiledSelect(bool $reset = true): string
{
$select = $this->compileSelect();
if ($reset === true)
{
$this->resetSelect();
}
return $this->compileFinalQuery($select);
}
//--------------------------------------------------------------------
/**
* Returns a finalized, compiled query string with the bindings
* inserted and prefixes swapped out.
*
* @param string $sql
*
* @return string
*/
protected function compileFinalQuery(string $sql): string
{
$query = new Query($this->db);
$query->setQuery($sql, $this->binds, false);
if (! empty($this->db->swapPre) && ! empty($this->db->DBPrefix))
{
$query->swapPrefix($this->db->DBPrefix, $this->db->swapPre);
}
return $query->getQuery();
}
/**
* Get
*
* Compiles the select statement based on the other functions called
* and runs the query
*
* @param integer $limit The limit clause
* @param integer $offset The offset clause
* @param boolean $returnSQL If true, returns the generate SQL, otherwise executes the query.
* @param boolean $reset Are we want to clear query builder values?
*
* @return ResultInterface
*/
public function get(int $limit = null, int $offset = 0, bool $returnSQL = false, bool $reset = true)
{
if (! is_null($limit))
{
$this->limit($limit, $offset);
}
$result = $returnSQL
? $this->getCompiledSelect($reset)
: $this->db->query($this->compileSelect(), $this->binds, false);
if ($reset === true)
{
$this->resetSelect();
// Clear our binds so we don't eat up memory
$this->binds = [];
}
return $result;
}
//--------------------------------------------------------------------
/**
* "Count All" query
*
* Generates a platform-specific query string that counts all records in
* the specified database
*
* @param boolean $reset Are we want to clear query builder values?
* @param boolean $test Are we running automated tests?
*
* @return integer|string when $test = true
*/
public function countAll(bool $reset = true, bool $test = false)
{
$table = $this->QBFrom[0];
$sql = $this->countString . $this->db->escapeIdentifiers('numrows') . ' FROM ' .
$this->db->protectIdentifiers($table, true, null, false);
if ($test)
{
return $sql;
}
$query = $this->db->query($sql, null, false);
if (empty($query->getResult()))
{
return 0;
}
$query = $query->getRow();
if ($reset === true)
{
$this->resetSelect();
}
return (int) $query->numrows;
}
//--------------------------------------------------------------------
/**
* "Count All Results" query
*
* Generates a platform-specific query string that counts all records
* returned by an Query Builder query.
*
* @param boolean $reset
* @param boolean $test The reset clause
*
* @return integer|string when $test = true
*/
public function countAllResults(bool $reset = true, bool $test = false)
{
// ORDER BY usage is often problematic here (most notably
// on Microsoft SQL Server) and ultimately unnecessary
// for selecting COUNT(*) ...
$orderBy = [];
if (! empty($this->QBOrderBy))
{
$orderBy = $this->QBOrderBy;
$this->QBOrderBy = null;
}
// We cannot use a LIMIT when getting the single row COUNT(*) result
$limit = $this->QBLimit;
$this->QBLimit = false;
$sql = ($this->QBDistinct === true)
?
$this->countString . $this->db->protectIdentifiers('numrows') . "\nFROM (\n" . $this->compileSelect() . "\n) CI_count_all_results"
:
$this->compileSelect($this->countString . $this->db->protectIdentifiers('numrows'));
if ($test)
{
return $sql;
}
$result = $this->db->query($sql, $this->binds, false);
if ($reset === true)
{
$this->resetSelect();
}
// If we've previously reset the QBOrderBy values, get them back
elseif (! isset($this->QBOrderBy))
{
$this->QBOrderBy = $orderBy ?? [];
}
// Restore the LIMIT setting
$this->QBLimit = $limit;
$row = (! $result instanceof ResultInterface)
? null
: $result->getRow();
if (empty($row))
{
return 0;
}
return (int) $row->numrows;
}
//--------------------------------------------------------------------
/**
* Get compiled 'where' condition string
*
* Compiles the set conditions and returns the sql statement
*
* @return string
*/
public function getCompiledQBWhere()
{
return $this->QBWhere;
}
//--------------------------------------------------------------------
/**
* Get_Where
*
* Allows the where clause, limit and offset to be added directly
*
* @param string|array $where
* @param integer $limit
* @param integer $offset
*
* @return ResultInterface
*/
public function getWhere($where = null, int $limit = null, int $offset = null)
{
if ($where !== null)
{
$this->where($where);
}
if (! empty($limit))
{
$this->limit($limit, $offset);
}
$result = $this->db->query($this->compileSelect(), $this->binds, false);
$this->resetSelect();
return $result;
}
//--------------------------------------------------------------------
/**
* Insert_Batch
*
* Compiles batch insert strings and runs the queries
*
* @param array $set An associative array of insert values
* @param boolean $escape Whether to escape values and identifiers
*
* @param integer $batchSize
* @param boolean $testing
*
* @return integer Number of rows inserted or FALSE on failure
* @throws DatabaseException
*/
public function insertBatch(array $set = null, bool $escape = null, int $batchSize = 100, bool $testing = false)
{
if ($set === null)
{
if (empty($this->QBSet))
{
if (CI_DEBUG)
{
throw new DatabaseException('You must use the "set" method to update an entry.');
}
return false;
}
}
else
{
if (empty($set))
{
if (CI_DEBUG)
{
throw new DatabaseException('insertBatch() called with no data');
}
return false;
}
$this->setInsertBatch($set, '', $escape);
}
$table = $this->QBFrom[0];
// Batch this baby
$affected_rows = 0;
for ($i = 0, $total = count($this->QBSet); $i < $total; $i += $batchSize)
{
$sql = $this->_insertBatch($this->db->protectIdentifiers($table, true, $escape, false), $this->QBKeys, array_slice($this->QBSet, $i, $batchSize));
if ($testing)
{
++ $affected_rows;
}
else
{
$this->db->query($sql, $this->binds, false);
$affected_rows += $this->db->affectedRows();
}
}
if (! $testing)
{
$this->resetWrite();
}
return $affected_rows;
}
//--------------------------------------------------------------------
/**
* Insert batch statement
*
* Generates a platform-specific insert string from the supplied data.
*
* @param string $table Table name
* @param array $keys INSERT keys
* @param array $values INSERT values
*
* @return string
*/
protected function _insertBatch(string $table, array $keys, array $values): string
{
return 'INSERT INTO ' . $table . ' (' . implode(', ', $keys) . ') VALUES ' . implode(', ', $values);
}
//--------------------------------------------------------------------
/**
* The "setInsertBatch" function. Allows key/value pairs to be set for batch inserts
*
* @param mixed $key
* @param string $value
* @param boolean $escape
*
* @return BaseBuilder|null
*/
public function setInsertBatch($key, string $value = '', bool $escape = null)
{
$key = $this->batchObjectToArray($key);
if (! is_array($key))
{
$key = [$key => $value];
}
$escape = is_bool($escape) ? $escape : $this->db->protectIdentifiers;
$keys = array_keys($this->objectToArray(current($key)));
sort($keys);
foreach ($key as $row)
{
$row = $this->objectToArray($row);
if (count(array_diff($keys, array_keys($row))) > 0 || count(array_diff(array_keys($row), $keys)) > 0)
{
// batch function above returns an error on an empty array
$this->QBSet[] = [];
return null;
}
ksort($row); // puts $row in the same order as our keys
$clean = [];
foreach ($row as $k => $value)
{
$clean[] = ':' . $this->setBind($k, $value, $escape) . ':';
}
$row = $clean;
$this->QBSet[] = '(' . implode(',', $row) . ')';
}
foreach ($keys as $k)
{
$this->QBKeys[] = $this->db->protectIdentifiers($k, false, $escape);
}
return $this;
}
//--------------------------------------------------------------------
/**
* Get INSERT query string
*
* Compiles an insert query and returns the sql
*
* @param boolean $reset TRUE: reset QB values; FALSE: leave QB values alone
*
* @return string
*/
public function getCompiledInsert(bool $reset = true): string
{
if ($this->validateInsert() === false)
{
return false;
}
$sql = $this->_insert(
$this->db->protectIdentifiers(
$this->QBFrom[0], true, null, false
), array_keys($this->QBSet), array_values($this->QBSet)
);
if ($reset === true)
{
$this->resetWrite();
}
return $this->compileFinalQuery($sql);
}
//--------------------------------------------------------------------
/**
* Insert
*
* Compiles an insert string and runs the query
*
* @param array $set An associative array of insert values
* @param boolean $escape Whether to escape values and identifiers
* @param boolean $test Used when running tests
*
* @return BaseResult|Query|false
*/
public function insert(array $set = null, bool $escape = null, bool $test = false)
{
if ($set !== null)
{
$this->set($set, '', $escape);
}
if ($this->validateInsert() === false)
{
return false;
}
$sql = $this->_insert(
$this->db->protectIdentifiers(
$this->QBFrom[0], true, $escape, false
), array_keys($this->QBSet), array_values($this->QBSet)
);
if ($test === false)
{
$this->resetWrite();
$result = $this->db->query($sql, $this->binds, false);
// Clear our binds so we don't eat up memory
$this->binds = [];
return $result;
}
return false;
}
//--------------------------------------------------------------------
/**
* Validate Insert
*
* This method is used by both insert() and getCompiledInsert() to
* validate that the there data is actually being set and that table
* has been chosen to be inserted into.
*
* @return boolean
* @throws DatabaseException
*/
protected function validateInsert(): bool
{
if (empty($this->QBSet))
{
if (CI_DEBUG)
{
throw new DatabaseException('You must use the "set" method to update an entry.');
}
return false;
}
return true;
}
//--------------------------------------------------------------------
/**
* Insert statement
*
* Generates a platform-specific insert string from the supplied data
*
* @param string $table The table name
* @param array $keys The insert keys
* @param array $unescapedKeys The insert values
*
* @return string
*/
protected function _insert(string $table, array $keys, array $unescapedKeys): string
{
return 'INSERT INTO ' . $table . ' (' . implode(', ', $keys) . ') VALUES (' . implode(', ', $unescapedKeys) . ')';
}
//--------------------------------------------------------------------
/**
* Replace
*
* Compiles an replace into string and runs the query
*
* @param array $set An associative array of insert values
* @param boolean $returnSQL
*
* @return BaseResult|Query|string|false
* @throws DatabaseException
*/
public function replace(array $set = null, bool $returnSQL = false)
{
if ($set !== null)
{
$this->set($set);
}
if (empty($this->QBSet))
{
if (CI_DEBUG)
{
throw new DatabaseException('You must use the "set" method to update an entry.');
}
return false;
}
$table = $this->QBFrom[0];
$sql = $this->_replace($table, array_keys($this->QBSet), array_values($this->QBSet));
$this->resetWrite();
return $returnSQL ? $sql : $this->db->query($sql, $this->binds, false);
}
//--------------------------------------------------------------------
/**
* Replace statement
*
* Generates a platform-specific replace string from the supplied data
*
* @param string $table The table name
* @param array $keys The insert keys
* @param array $values The insert values
*
* @return string
*/
protected function _replace(string $table, array $keys, array $values): string
{
return 'REPLACE INTO ' . $table . ' (' . implode(', ', $keys) . ') VALUES (' . implode(', ', $values) . ')';
}
//--------------------------------------------------------------------
/**
* FROM tables
*
* Groups tables in FROM clauses if needed, so there is no confusion
* about operator precedence.
*
* Note: This is only used (and overridden) by MySQL and CUBRID.
*
* @return string
*/
protected function _fromTables(): string
{
return implode(', ', $this->QBFrom);
}
//--------------------------------------------------------------------
/**
* Get UPDATE query string
*
* Compiles an update query and returns the sql
*
* @param boolean $reset TRUE: reset QB values; FALSE: leave QB values alone
*
* @return string
*/
public function getCompiledUpdate(bool $reset = true): string
{
if ($this->validateUpdate() === false)
{
return false;
}
$sql = $this->_update($this->QBFrom[0], $this->QBSet);
if ($reset === true)
{
$this->resetWrite();
}
return $this->compileFinalQuery($sql);
}
//--------------------------------------------------------------------
/**
* UPDATE
*
* Compiles an update string and runs the query.
*
* @param array $set An associative array of update values
* @param mixed $where
* @param integer $limit
* @param boolean $test Are we testing the code?
*
* @return boolean TRUE on success, FALSE on failure
*/
public function update(array $set = null, $where = null, int $limit = null, bool $test = false): bool
{
if ($set !== null)
{
$this->set($set);
}
if ($this->validateUpdate() === false)
{
return false;
}
if ($where !== null)
{
$this->where($where);
}
if (! empty($limit))
{
if (! $this->canLimitWhereUpdates)
{
throw new DatabaseException('This driver does not allow LIMITs on UPDATE queries using WHERE.');
}
$this->limit($limit);
}
$sql = $this->_update($this->QBFrom[0], $this->QBSet);
if (! $test)
{
$this->resetWrite();
if ($this->db->query($sql, $this->binds, false))
{
// Clear our binds so we don't eat up memory
$this->binds = [];
return true;
}
return false;
}
return true;
}
//--------------------------------------------------------------------
/**
* Update statement
*
* Generates a platform-specific update string from the supplied data
*
* @param string $table the Table name
* @param array $values the Update data
*
* @return string
*/
protected function _update(string $table, array $values): string
{
$valstr = [];
foreach ($values as $key => $val)
{
$valstr[] = $key . ' = ' . $val;
}
return 'UPDATE ' . $table . ' SET ' . implode(', ', $valstr)
. $this->compileWhereHaving('QBWhere')
. $this->compileOrderBy()
. ($this->QBLimit ? $this->_limit(' ') : '');
}
//--------------------------------------------------------------------
/**
* Validate Update
*
* This method is used by both update() and getCompiledUpdate() to
* validate that data is actually being set and that a table has been
* chosen to be update.
*
* @return boolean
* @throws \CodeIgniter\Database\Exceptions\DatabaseException
*/
protected function validateUpdate(): bool
{
if (empty($this->QBSet))
{
if (CI_DEBUG)
{
throw new DatabaseException('You must use the "set" method to update an entry.');
}
return false;
}
return true;
}
//--------------------------------------------------------------------
/**
* Update_Batch
*
* Compiles an update string and runs the query
*
* @param array $set An associative array of update values
* @param string $index The where key
* @param integer $batchSize The size of the batch to run
* @param boolean $returnSQL True means SQL is returned, false will execute the query
*
* @return mixed Number of rows affected, SQL string, or FALSE on failure
* @throws \CodeIgniter\Database\Exceptions\DatabaseException
*/
public function updateBatch(array $set = null, string $index = null, int $batchSize = 100, bool $returnSQL = false)
{
if ($index === null)
{
if (CI_DEBUG)
{
throw new DatabaseException('You must specify an index to match on for batch updates.');
}
return false;
}
if ($set === null)
{
if (empty($this->QBSet))
{
if (CI_DEBUG)
{
throw new DatabaseException('You must use the "set" method to update an entry.');
}
return false;
}
}
else
{
if (empty($set))
{
if (CI_DEBUG)
{
throw new DatabaseException('updateBatch() called with no data');
}
return false;
}
$this->setUpdateBatch($set, $index);
}
$table = $this->QBFrom[0];
// Batch this baby
$affected_rows = 0;
$savedSQL = [];
for ($i = 0, $total = count($this->QBSet); $i < $total; $i += $batchSize)
{
$sql = $this->_updateBatch($table, array_slice($this->QBSet, $i, $batchSize), $this->db->protectIdentifiers($index)
);
if ($returnSQL)
{
$savedSQL[] = $sql;
}
else
{
$this->db->query($sql, $this->binds, false);
$affected_rows += $this->db->affectedRows();
}
$this->QBWhere = [];
}
$this->resetWrite();
return $returnSQL ? $savedSQL : $affected_rows;
}
//--------------------------------------------------------------------
/**
* Update_Batch statement
*
* Generates a platform-specific batch update string from the supplied data
*
* @param string $table Table name
* @param array $values Update data
* @param string $index WHERE key
*
* @return string
*/
protected function _updateBatch(string $table, array $values, string $index): string
{
$ids = [];
$final = [];
foreach ($values as $key => $val)
{
$ids[] = $val[$index];
foreach (array_keys($val) as $field)
{
if ($field !== $index)
{
$final[$field][] = 'WHEN ' . $index . ' = ' . $val[$index] . ' THEN ' . $val[$field];
}
}
}
$cases = '';
foreach ($final as $k => $v)
{
$cases .= $k . " = CASE \n"
. implode("\n", $v) . "\n"
. 'ELSE ' . $k . ' END, ';
}
$this->where($index . ' IN(' . implode(',', $ids) . ')', null, false);
return 'UPDATE ' . $table . ' SET ' . substr($cases, 0, -2) . $this->compileWhereHaving('QBWhere');
}
//--------------------------------------------------------------------
/**
* The "setUpdateBatch" function. Allows key/value pairs to be set for batch updating
*
* @param array|object $key
* @param string $index
* @param boolean $escape
*
* @return BaseBuilder|null
* @throws \CodeIgniter\Database\Exceptions\DatabaseException
*/
public function setUpdateBatch($key, string $index = '', bool $escape = null)
{
$key = $this->batchObjectToArray($key);
if (! is_array($key))
{
return null;
}
is_bool($escape) || $escape = $this->db->protectIdentifiers;
foreach ($key as $k => $v)
{
$index_set = false;
$clean = [];
foreach ($v as $k2 => $v2)
{
if ($k2 === $index)
{
$index_set = true;
}
$bind = $this->setBind($k2, $v2, $escape);
$clean[$this->db->protectIdentifiers($k2, false, $escape)] = ":$bind:";
}
if ($index_set === false)
{
throw new DatabaseException('One or more rows submitted for batch updating is missing the specified index.');
}
$this->QBSet[] = $clean;
}
return $this;
}
//--------------------------------------------------------------------
/**
* Empty Table
*
* Compiles a delete string and runs "DELETE FROM table"
*
* @param boolean $test
* @return boolean TRUE on success, FALSE on failure
*/
public function emptyTable(bool $test = false)
{
$table = $this->QBFrom[0];
$sql = $this->_delete($table);
if ($test)
{
return $sql;
}
$this->resetWrite();
return $this->db->query($sql, null, false);
}
//--------------------------------------------------------------------
/**
* Truncate
*
* Compiles a truncate string and runs the query
* If the database does not support the truncate() command
* This function maps to "DELETE FROM table"
*
* @param boolean $test Whether we're in test mode or not.
*
* @return boolean TRUE on success, FALSE on failure
*/
public function truncate(bool $test = false)
{
$table = $this->QBFrom[0];
$sql = $this->_truncate($table);
if ($test === true)
{
return $sql;
}
$this->resetWrite();
return $this->db->query($sql, null, false);
}
//--------------------------------------------------------------------
/**
* Truncate statement
*
* Generates a platform-specific truncate string from the supplied data
*
* If the database does not support the truncate() command,
* then this method maps to 'DELETE FROM table'
*
* @param string $table The table name
*
* @return string
*/
protected function _truncate(string $table): string
{
return 'TRUNCATE ' . $table;
}
//--------------------------------------------------------------------
/**
* Get DELETE query string
*
* Compiles a delete query string and returns the sql
*
* @param boolean $reset TRUE: reset QB values; FALSE: leave QB values alone
*
* @return string
*/
public function getCompiledDelete(bool $reset = true): string
{
$table = $this->QBFrom[0];
$sql = $this->delete($table, '', $reset, true);
return $this->compileFinalQuery($sql);
}
//--------------------------------------------------------------------
/**
* Delete
*
* Compiles a delete string and runs the query
*
* @param mixed $where The where clause
* @param integer $limit The limit clause
* @param boolean $reset_data
* @param boolean $returnSQL
*
* @return mixed
* @throws \CodeIgniter\Database\Exceptions\DatabaseException
*/
public function delete($where = '', int $limit = null, bool $reset_data = true, bool $returnSQL = false)
{
$table = $this->db->protectIdentifiers($this->QBFrom[0], true, null, false);
if ($where !== '')
{
$this->where($where);
}
if (empty($this->QBWhere))
{
if (CI_DEBUG)
{
throw new DatabaseException('Deletes are not allowed unless they contain a "where" or "like" clause.');
}
return false;
}
$sql = $this->_delete($table);
if (! empty($limit))
{
$this->QBLimit = $limit;
}
if (! empty($this->QBLimit))
{
if (! $this->canLimitDeletes)
{
throw new DatabaseException('SQLite3 does not allow LIMITs on DELETE queries.');
}
$sql = $this->_limit($sql);
}
if ($reset_data)
{
$this->resetWrite();
}
return ($returnSQL === true) ? $sql : $this->db->query($sql, $this->binds, false);
}
//--------------------------------------------------------------------
/**
* Increments a numeric column by the specified value.
*
* @param string $column
* @param integer $value
*
* @return boolean
*/
public function increment(string $column, int $value = 1)
{
$column = $this->db->protectIdentifiers($column);
$sql = $this->_update($this->QBFrom[0], [$column => "{$column} + {$value}"]);
return $this->db->query($sql, $this->binds, false);
}
//--------------------------------------------------------------------
/**
* Decrements a numeric column by the specified value.
*
* @param string $column
* @param integer $value
*
* @return boolean
*/
public function decrement(string $column, int $value = 1)
{
$column = $this->db->protectIdentifiers($column);
$sql = $this->_update($this->QBFrom[0], [$column => "{$column}-{$value}"]);
return $this->db->query($sql, $this->binds, false);
}
//--------------------------------------------------------------------
/**
* Delete statement
*
* Generates a platform-specific delete string from the supplied data
*
* @param string $table The table name
*
* @return string
*/
protected function _delete(string $table): string
{
return 'DELETE FROM ' . $table . $this->compileWhereHaving('QBWhere')
. ($this->QBLimit ? ' LIMIT ' . $this->QBLimit : '');
}
//--------------------------------------------------------------------
/**
* Track Aliases
*
* Used to track SQL statements written with aliased tables.
*
* @param string|array $table The table to inspect
*
* @return string|void
*/
protected function trackAliases($table)
{
if (is_array($table))
{
foreach ($table as $t)
{
$this->trackAliases($t);
}
return;
}
// Does the string contain a comma? If so, we need to separate
// the string into discreet statements
if (strpos($table, ',') !== false)
{
return $this->trackAliases(explode(',', $table));
}
// if a table alias is used we can recognize it by a space
if (strpos($table, ' ') !== false)
{
// if the alias is written with the AS keyword, remove it
$table = preg_replace('/\s+AS\s+/i', ' ', $table);
// Grab the alias
$table = trim(strrchr($table, ' '));
// Store the alias, if it doesn't already exist
$this->db->addTableAlias($table);
}
}
//--------------------------------------------------------------------
/**
* Compile the SELECT statement
*
* Generates a query string based on which functions were used.
* Should not be called directly.
*
* @param mixed $select_override
*
* @return string
*/
protected function compileSelect($select_override = false): string
{
// Write the "select" portion of the query
if ($select_override !== false)
{
$sql = $select_override;
}
else
{
$sql = ( ! $this->QBDistinct) ? 'SELECT ' : 'SELECT DISTINCT ';
if (empty($this->QBSelect))
{
$sql .= '*';
}
else
{
// Cycle through the "select" portion of the query and prep each column name.
// The reason we protect identifiers here rather than in the select() function
// is because until the user calls the from() function we don't know if there are aliases
foreach ($this->QBSelect as $key => $val)
{
$no_escape = $this->QBNoEscape[$key] ?? null;
$this->QBSelect[$key] = $this->db->protectIdentifiers($val, false, $no_escape);
}
$sql .= implode(', ', $this->QBSelect);
}
}
// Write the "FROM" portion of the query
if (! empty($this->QBFrom))
{
$sql .= "\nFROM " . $this->_fromTables();
}
// Write the "JOIN" portion of the query
if (! empty($this->QBJoin))
{
$sql .= "\n" . implode("\n", $this->QBJoin);
}
$sql .= $this->compileWhereHaving('QBWhere')
. $this->compileGroupBy()
. $this->compileWhereHaving('QBHaving')
. $this->compileOrderBy(); // ORDER BY
// LIMIT
if ($this->QBLimit)
{
return $this->_limit($sql . "\n");
}
return $sql;
}
//--------------------------------------------------------------------
/**
* Compile WHERE, HAVING statements
*
* Escapes identifiers in WHERE and HAVING statements at execution time.
*
* Required so that aliases are tracked properly, regardless of whether
* where(), orWhere(), having(), orHaving are called prior to from(),
* join() and prefixTable is added only if needed.
*
* @param string $qb_key 'QBWhere' or 'QBHaving'
*
* @return string SQL statement
*/
protected function compileWhereHaving(string $qb_key): string
{
if (! empty($this->$qb_key))
{
for ($i = 0, $c = count($this->$qb_key); $i < $c; $i ++)
{
// Is this condition already compiled?
if (is_string($this->{$qb_key}[$i]))
{
continue;
}
elseif ($this->{$qb_key}[$i]['escape'] === false)
{
$this->{$qb_key}[$i] = $this->{$qb_key}[$i]['condition'];
continue;
}
// Split multiple conditions
$conditions = preg_split(
'/((?:^|\s+)AND\s+|(?:^|\s+)OR\s+)/i', $this->{$qb_key}[$i]['condition'], -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY
);
for ($ci = 0, $cc = count($conditions); $ci < $cc; $ci ++)
{
if (($op = $this->getOperator($conditions[$ci])) === false
|| ! preg_match('/^(\(?)(.*)(' . preg_quote($op, '/') . ')\s*(.*(?<!\)))?(\)?)$/i', $conditions[$ci], $matches)
)
{
continue;
}
// $matches = array(
// 0 => '(test <= foo)', /* the whole thing */
// 1 => '(', /* optional */
// 2 => 'test', /* the field name */
// 3 => ' <= ', /* $op */
// 4 => 'foo', /* optional, if $op is e.g. 'IS NULL' */
// 5 => ')' /* optional */
// );
if (! empty($matches[4]))
{
$matches[4] = ' ' . $matches[4];
}
$conditions[$ci] = $matches[1] . $this->db->protectIdentifiers(trim($matches[2]))
. ' ' . trim($matches[3]) . $matches[4] . $matches[5];
}
$this->{$qb_key}[$i] = implode('', $conditions);
}
return ($qb_key === 'QBHaving' ? "\nHAVING " : "\nWHERE ")
. implode("\n", $this->$qb_key);
}
return '';
}
//--------------------------------------------------------------------
/**
* Compile GROUP BY
*
* Escapes identifiers in GROUP BY statements at execution time.
*
* Required so that aliases are tracked properly, regardless of whether
* groupBy() is called prior to from(), join() and prefixTable is added
* only if needed.
*
* @return string SQL statement
*/
protected function compileGroupBy(): string
{
if (! empty($this->QBGroupBy))
{
for ($i = 0, $c = count($this->QBGroupBy); $i < $c; $i ++)
{
// Is it already compiled?
if (is_string($this->QBGroupBy[$i]))
{
continue;
}
$this->QBGroupBy[$i] = ($this->QBGroupBy[$i]['escape'] === false ||
$this->isLiteral($this->QBGroupBy[$i]['field'])) ? $this->QBGroupBy[$i]['field'] : $this->db->protectIdentifiers($this->QBGroupBy[$i]['field']);
}
return "\nGROUP BY " . implode(', ', $this->QBGroupBy);
}
return '';
}
//--------------------------------------------------------------------
/**
* Compile ORDER BY
*
* Escapes identifiers in ORDER BY statements at execution time.
*
* Required so that aliases are tracked properly, regardless of whether
* orderBy() is called prior to from(), join() and prefixTable is added
* only if needed.
*
* @return string SQL statement
*/
protected function compileOrderBy(): string
{
if (is_array($this->QBOrderBy) && ! empty($this->QBOrderBy))
{
for ($i = 0, $c = count($this->QBOrderBy); $i < $c; $i ++)
{
if ($this->QBOrderBy[$i]['escape'] !== false && ! $this->isLiteral($this->QBOrderBy[$i]['field']))
{
$this->QBOrderBy[$i]['field'] = $this->db->protectIdentifiers($this->QBOrderBy[$i]['field']);
}
$this->QBOrderBy[$i] = $this->QBOrderBy[$i]['field'] . $this->QBOrderBy[$i]['direction'];
}
return $this->QBOrderBy = "\nORDER BY " . implode(', ', $this->QBOrderBy);
}
elseif (is_string($this->QBOrderBy))
{
return $this->QBOrderBy;
}
return '';
}
//--------------------------------------------------------------------
/**
* Object to Array
*
* Takes an object as input and converts the class variables to array key/vals
*
* @param mixed $object
*
* @return mixed
*/
protected function objectToArray($object)
{
if (! is_object($object))
{
return $object;
}
$array = [];
foreach (get_object_vars($object) as $key => $val)
{
// There are some built in keys we need to ignore for this conversion
if (! is_object($val) && ! is_array($val) && $key !== '_parent_name')
{
$array[$key] = $val;
}
}
return $array;
}
//--------------------------------------------------------------------
/**
* Object to Array
*
* Takes an object as input and converts the class variables to array key/vals
*
* @param mixed $object
*
* @return mixed
*/
protected function batchObjectToArray($object)
{
if (! is_object($object))
{
return $object;
}
$array = [];
$out = get_object_vars($object);
$fields = array_keys($out);
foreach ($fields as $val)
{
// There are some built in keys we need to ignore for this conversion
if ($val !== '_parent_name')
{
$i = 0;
foreach ($out[$val] as $data)
{
$array[$i ++][$val] = $data;
}
}
}
return $array;
}
//--------------------------------------------------------------------
/**
* Is literal
*
* Determines if a string represents a literal value or a field name
*
* @param string $str
*
* @return boolean
*/
protected function isLiteral(string $str): bool
{
$str = trim($str);
if (empty($str) || ctype_digit($str) || (string) (float) $str === $str ||
in_array(strtoupper($str), ['TRUE', 'FALSE'], true)
)
{
return true;
}
static $_str;
if (empty($_str))
{
$_str = ($this->db->escapeChar !== '"') ? ['"', "'"] : ["'"];
}
return in_array($str[0], $_str, true);
}
//--------------------------------------------------------------------
/**
* Reset Query Builder values.
*
* Publicly-visible method to reset the QB values.
*
* @return BaseBuilder
*/
public function resetQuery()
{
$this->resetSelect();
$this->resetWrite();
return $this;
}
//--------------------------------------------------------------------
/**
* Resets the query builder values. Called by the get() function
*
* @param array $qb_reset_items An array of fields to reset
*
* @return void
*/
protected function resetRun(array $qb_reset_items)
{
foreach ($qb_reset_items as $item => $default_value)
{
$this->$item = $default_value;
}
}
//--------------------------------------------------------------------
/**
* Resets the query builder values. Called by the get() function
*/
protected function resetSelect()
{
$this->resetRun([
'QBSelect' => [],
'QBJoin' => [],
'QBWhere' => [],
'QBGroupBy' => [],
'QBHaving' => [],
'QBOrderBy' => [],
'QBNoEscape' => [],
'QBDistinct' => false,
'QBLimit' => false,
'QBOffset' => false,
]);
if (! empty($this->db))
{
$this->db->setAliasedTables([]);
}
}
//--------------------------------------------------------------------
/**
* Resets the query builder "write" values.
*
* Called by the insert() update() insertBatch() updateBatch() and delete() functions
*/
protected function resetWrite()
{
$this->resetRun([
'QBSet' => [],
'QBJoin' => [],
'QBWhere' => [],
'QBOrderBy' => [],
'QBKeys' => [],
'QBLimit' => false,
]);
}
//--------------------------------------------------------------------
/**
* Tests whether the string has an SQL operator
*
* @param string $str
*
* @return boolean
*/
protected function hasOperator(string $str): bool
{
return (bool) preg_match('/(<|>|!|=|\sIS NULL|\sIS NOT NULL|\sEXISTS|\sBETWEEN|\sLIKE|\sIN\s*\(|\s)/i', trim($str));
}
// --------------------------------------------------------------------
/**
* Returns the SQL string operator
*
* @param string $str
* @param boolean $list
*
* @return mixed
*/
protected function getOperator(string $str, bool $list = false)
{
static $_operators;
if (empty($_operators))
{
$_les = ($this->db->likeEscapeStr !== '') ? '\s+' . preg_quote(trim(sprintf($this->db->likeEscapeStr, $this->db->likeEscapeChar)), '/') : '';
$_operators = [
'\s*(?:<|>|!)?=\s*', // =, <=, >=, !=
'\s*<>?\s*', // <, <>
'\s*>\s*', // >
'\s+IS NULL', // IS NULL
'\s+IS NOT NULL', // IS NOT NULL
'\s+EXISTS\s*\(.*\)', // EXISTS(sql)
'\s+NOT EXISTS\s*\(.*\)', // NOT EXISTS(sql)
'\s+BETWEEN\s+', // BETWEEN value AND value
'\s+IN\s*\(.*\)', // IN(list)
'\s+NOT IN\s*\(.*\)', // NOT IN (list)
'\s+LIKE\s+\S.*(' . $_les . ')?', // LIKE 'expr'[ ESCAPE '%s']
'\s+NOT LIKE\s+\S.*(' . $_les . ')?', // NOT LIKE 'expr'[ ESCAPE '%s']
];
}
return preg_match_all('/' . implode('|', $_operators) . '/i', $str, $match) ? ($list ? $match[0] : $match[0][0]) : false;
}
// --------------------------------------------------------------------
/**
* Stores a bind value after ensuring that it's unique.
* While it might be nicer to have named keys for our binds array
* with PHP 7+ we get a huge memory/performance gain with indexed
* arrays instead, so lets take advantage of that here.
*
* @param string $key
* @param mixed $value
* @param boolean $escape
*
* @return string
*/
protected function setBind(string $key, $value = null, bool $escape = true): string
{
if (! array_key_exists($key, $this->binds))
{
$this->binds[$key] = [
$value,
$escape,
];
return $key;
}
$count = 0;
while (array_key_exists($key . $count, $this->binds))
{
++$count;
}
$this->binds[$key . $count] = [
$value,
$escape,
];
return $key . $count;
}
//--------------------------------------------------------------------
/**
* Returns a clone of a Base Builder with reset query builder values.
*
* @return BaseBuilder
*/
protected function cleanClone()
{
return (clone $this)->from([], true)->resetQuery();
}
//--------------------------------------------------------------------
}
Jim Parry