135 lines
2.7 KiB
PHP
135 lines
2.7 KiB
PHP
<?php namespace Laravel\DB;
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class Compiler {
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/**
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* Compile a SQL SELECT statment from a Query instance.
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*
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* @param Query $query
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* @return string
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*/
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public function select(Query $query)
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{
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foreach (array('add_select', 'add_from', 'add_where', 'add_order', 'add_limit', 'add_offset') as $builder)
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{
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$sql[] = $this->$builder($query);
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}
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foreach ($sql as $key => $value) { if (is_null($value) or $value === '') unset($sql[$key]); }
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return implode(' ', $sql);
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}
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/**
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* Get the SELECT clause from the Query instance.
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*
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* @param Query $query
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* @return string
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*/
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protected function add_select(Query $query)
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{
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return $query->select;
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}
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/**
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* Get the FROM clause from the Query instance.
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*
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* @param Query $query
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* @return string
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*/
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protected function add_from(Query $query)
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{
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return $query->from;
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}
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/**
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* Get the WHERE clause from the Query instance.
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*
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* @param Query $query
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* @return string
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*/
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protected function add_where(Query $query)
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{
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return $query->where;
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}
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/**
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* Get the ORDER BY clause from the Query instance.
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*
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* @param Query $query
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* @return string
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*/
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protected function add_order(Query $query)
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{
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if (count($query->orderings) > 0) return 'ORDER BY'.implode(', ', $query->orderings);
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}
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/**
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* Get the LIMIT clause from the Query instance.
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*
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* @param Query $query
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* @return string
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*/
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protected function add_limit(Query $query)
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{
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if ( ! is_null($query->limit)) return 'LIMIT '.$query->limit;
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}
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/**
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* Get the OFFSET clause from the Query instance.
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*
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* @param Query $query
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* @return string
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*/
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protected function add_offset(Query $query)
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{
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if ( ! is_null($query->offset)) return 'OFFSET '.$query->offset;
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}
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/**
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* Compile a SQL INSERT statment from a Query instance.
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*
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* @param Query $query
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* @param array $values
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* @return string
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*/
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public function insert(Query $query, $values)
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{
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$sql = 'INSERT INTO '.$query->wrap($query->table);
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$columns = array_map(array($query, 'wrap'), array_keys($values));
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return $sql .= ' ('.implode(', ', $columns).') VALUES ('.$query->parameterize($values).')';
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}
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/**
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* Compile a SQL UPDATE statment from a Query instance.
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*
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* @param Query $query
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* @param array $values
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* @return string
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*/
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public function update(Query $query, $values)
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{
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$sql = 'UPDATE '.$query->wrap($query->table).' SET ';
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foreach (array_keys($values) as $column)
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{
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$sets[] = $query->wrap($column).' = ?';
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}
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return $sql.implode(', ', $sets).' '.$query->where;
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}
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/**
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* Compile a SQL DELETE statment from a Query instance.
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*
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* @param Query $query
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* @return string
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*/
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public function delete(Query $query)
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{
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return 'DELETE FROM '.$query->wrap($query->table).' '.$query->where;
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}
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} |