145 lines
2.7 KiB
PHP
Executable File
145 lines
2.7 KiB
PHP
Executable File
<?php namespace Illuminate\Database\Query\Grammars;
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use Illuminate\Database\Query\Builder;
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class MySqlGrammar extends Grammar {
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/**
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* The components that make up a select clause.
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*
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* @var array
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*/
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protected $selectComponents = array(
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'aggregate',
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'columns',
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'from',
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'joins',
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'wheres',
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'groups',
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'havings',
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'orders',
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'limit',
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'offset',
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'lock',
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);
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/**
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* Compile a select query into SQL.
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*
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* @param \Illuminate\Database\Query\Builder
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* @return string
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*/
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public function compileSelect(Builder $query)
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{
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$sql = parent::compileSelect($query);
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if ($query->unions)
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{
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$sql = '('.$sql.') '.$this->compileUnions($query);
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}
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return $sql;
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}
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/**
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* Compile a single union statement.
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*
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* @param array $union
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* @return string
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*/
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protected function compileUnion(array $union)
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{
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$joiner = $union['all'] ? ' union all ' : ' union ';
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return $joiner.'('.$union['query']->toSql().')';
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}
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/**
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* Compile the lock into SQL.
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*
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* @param \Illuminate\Database\Query\Builder $query
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* @param bool|string $value
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* @return string
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*/
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protected function compileLock(Builder $query, $value)
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{
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if (is_string($value)) return $value;
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return $value ? 'for update' : 'lock in share mode';
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}
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/**
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* Compile an update statement into SQL.
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*
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* @param \Illuminate\Database\Query\Builder $query
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* @param array $values
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* @return string
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*/
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public function compileUpdate(Builder $query, $values)
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{
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$sql = parent::compileUpdate($query, $values);
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if (isset($query->orders))
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{
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$sql .= ' '.$this->compileOrders($query, $query->orders);
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}
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if (isset($query->limit))
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{
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$sql .= ' '.$this->compileLimit($query, $query->limit);
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}
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return rtrim($sql);
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}
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/**
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* Compile a delete statement into SQL.
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*
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* @param \Illuminate\Database\Query\Builder $query
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* @return string
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*/
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public function compileDelete(Builder $query)
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{
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$table = $this->wrapTable($query->from);
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$where = is_array($query->wheres) ? $this->compileWheres($query) : '';
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if (isset($query->joins))
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{
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$joins = ' '.$this->compileJoins($query, $query->joins);
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$sql = trim("delete $table from {$table}{$joins} $where");
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}
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else
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{
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$sql = trim("delete from $table $where");
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}
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if (isset($query->orders))
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{
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$sql .= ' '.$this->compileOrders($query, $query->orders);
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}
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if (isset($query->limit))
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{
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$sql .= ' '.$this->compileLimit($query, $query->limit);
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}
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return $sql;
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}
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/**
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* Wrap a single string in keyword identifiers.
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*
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* @param string $value
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* @return string
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*/
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protected function wrapValue($value)
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{
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if ($value === '*') return $value;
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return '`'.str_replace('`', '``', $value).'`';
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}
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}
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