<?php
namespace Illuminate\Database\Query\Grammars;
use Illuminate\Support\Arr;
use Illuminate\Database\Query\Builder;
use Illuminate\Database\Query\JoinClause;
use Illuminate\Database\Grammar as BaseGrammar;
class Grammar extends BaseGrammar
{
/**
* The grammar specific operators.
*
* @var array
*/
protected $operators = [];
/**
* The components that make up a select clause.
*
* @var array
*/
protected $selectComponents = [
'aggregate',
'columns',
'from',
'joins',
'wheres',
'groups',
'havings',
'orders',
'limit',
'offset',
'unions',
'lock',
];
/**
* Compile a select query into SQL.
*
* @param \Illuminate\Database\Query\Builder $query
* @return string
*/
public function compileSelect(Builder $query)
{
// If the query does not have any columns set, we'll set the columns to the
// * character to just get all of the columns from the database. Then we
// can build the query and concatenate all the pieces together as one.
$original = $query->columns;
if (is_null($query->columns)) {
$query->columns = ['*'];
}
// To compile the query, we'll spin through each component of the query and
// see if that component exists. If it does we'll just call the compiler
// function for the component which is responsible for making the SQL.
$sql = trim($this->concatenate(
$this->compileComponents($query))
);
$query->columns = $original;
return $sql;
}
/**
* Compile the components necessary for a select clause.
*
* @param \Illuminate\Database\Query\Builder $query
* @return array
*/
protected function compileComponents(Builder $query)
{
$sql = [];
foreach ($this->selectComponents as $component) {
// To compile the query, we'll spin through each component of the query and
// see if that component exists. If it does we'll just call the compiler
// function for the component which is responsible for making the SQL.
if (! is_null($query->$component)) {
$method = 'compile'.ucfirst($component);
$sql[$component] = $this->$method($query, $query->$component);
}
}
return $sql;
}
/**
* Compile an aggregated select clause.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $aggregate
* @return string
*/
protected function compileAggregate(Builder $query, $aggregate)
{
$column = $this->columnize($aggregate['columns']);
// If the query has a "distinct" constraint and we're not asking for all columns
// we need to prepend "distinct" onto the column name so that the query takes
// it into account when it performs the aggregating operations on the data.
if ($query->distinct && $column !== '*') {
$column = 'distinct '.$column;
}
return 'select '.$aggregate['function'].'('.$column.') as aggregate';
}
/**
* Compile the "select *" portion of the query.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $columns
* @return string|null
*/
protected function compileColumns(Builder $query, $columns)
{
// If the query is actually performing an aggregating select, we will let that
// compiler handle the building of the select clauses, as it will need some
// more syntax that is best handled by that function to keep things neat.
if (! is_null($query->aggregate)) {
return;
}
$select = $query->distinct ? 'select distinct ' : 'select ';
return $select.$this->columnize($columns);
}
/**
* Compile the "from" portion of the query.
*
* @param \Illuminate\Database\Query\Builder $query
* @param string $table
* @return string
*/
protected function compileFrom(Builder $query, $table)
{
return 'from '.$this->wrapTable($table);
}
/**
* Compile the "join" portions of the query.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $joins
* @return string
*/
protected function compileJoins(Builder $query, $joins)
{
return collect($joins)->map(function ($join) use ($query) {
$table = $this->wrapTable($join->table);
$nestedJoins = is_null($join->joins) ? '' : ' '.$this->compileJoins($query, $join->joins);
return trim("{$join->type} join {$table}{$nestedJoins} {$this->compileWheres($join)}");
})->implode(' ');
}
/**
* Compile the "where" portions of the query.
*
* @param \Illuminate\Database\Query\Builder $query
* @return string
*/
protected function compileWheres(Builder $query)
{
// Each type of where clauses has its own compiler function which is responsible
// for actually creating the where clauses SQL. This helps keep the code nice
// and maintainable since each clause has a very small method that it uses.
if (is_null($query->wheres)) {
return '';
}
// If we actually have some where clauses, we will strip off the first boolean
// operator, which is added by the query builders for convenience so we can
// avoid checking for the first clauses in each of the compilers methods.
if (count($sql = $this->compileWheresToArray($query)) > 0) {
return $this->concatenateWhereClauses($query, $sql);
}
return '';
}
/**
* Get an array of all the where clauses for the query.
*
* @param \Illuminate\Database\Query\Builder $query
* @return array
*/
protected function compileWheresToArray($query)
{
return collect($query->wheres)->map(function ($where) use ($query) {
return $where['boolean'].' '.$this->{"where{$where['type']}"}($query, $where);
})->all();
}
/**
* Format the where clause statements into one string.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $sql
* @return string
*/
protected function concatenateWhereClauses($query, $sql)
{
$conjunction = $query instanceof JoinClause ? 'on' : 'where';
return $conjunction.' '.$this->removeLeadingBoolean(implode(' ', $sql));
}
/**
* Compile a raw where clause.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function whereRaw(Builder $query, $where)
{
return $where['sql'];
}
/**
* Compile a basic where clause.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function whereBasic(Builder $query, $where)
{
$value = $this->parameter($where['value']);
return $this->wrap($where['column']).' '.$where['operator'].' '.$value;
}
/**
* Compile a "where in" clause.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function whereIn(Builder $query, $where)
{
if (! empty($where['values'])) {
return $this->wrap($where['column']).' in ('.$this->parameterize($where['values']).')';
}
return '0 = 1';
}
/**
* Compile a "where not in" clause.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function whereNotIn(Builder $query, $where)
{
if (! empty($where['values'])) {
return $this->wrap($where['column']).' not in ('.$this->parameterize($where['values']).')';
}
return '1 = 1';
}
/**
* Compile a where in sub-select clause.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function whereInSub(Builder $query, $where)
{
return $this->wrap($where['column']).' in ('.$this->compileSelect($where['query']).')';
}
/**
* Compile a where not in sub-select clause.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function whereNotInSub(Builder $query, $where)
{
return $this->wrap($where['column']).' not in ('.$this->compileSelect($where['query']).')';
}
/**
* Compile a "where null" clause.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function whereNull(Builder $query, $where)
{
return $this->wrap($where['column']).' is null';
}
/**
* Compile a "where not null" clause.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function whereNotNull(Builder $query, $where)
{
return $this->wrap($where['column']).' is not null';
}
/**
* Compile a "between" where clause.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function whereBetween(Builder $query, $where)
{
$between = $where['not'] ? 'not between' : 'between';
return $this->wrap($where['column']).' '.$between.' ? and ?';
}
/**
* Compile a "where date" clause.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function whereDate(Builder $query, $where)
{
return $this->dateBasedWhere('date', $query, $where);
}
/**
* Compile a "where time" clause.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function whereTime(Builder $query, $where)
{
return $this->dateBasedWhere('time', $query, $where);
}
/**
* Compile a "where day" clause.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function whereDay(Builder $query, $where)
{
return $this->dateBasedWhere('day', $query, $where);
}
/**
* Compile a "where month" clause.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function whereMonth(Builder $query, $where)
{
return $this->dateBasedWhere('month', $query, $where);
}
/**
* Compile a "where year" clause.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function whereYear(Builder $query, $where)
{
return $this->dateBasedWhere('year', $query, $where);
}
/**
* Compile a date based where clause.
*
* @param string $type
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function dateBasedWhere($type, Builder $query, $where)
{
$value = $this->parameter($where['value']);
return $type.'('.$this->wrap($where['column']).') '.$where['operator'].' '.$value;
}
/**
* Compile a where clause comparing two columns..
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function whereColumn(Builder $query, $where)
{
return $this->wrap($where['first']).' '.$where['operator'].' '.$this->wrap($where['second']);
}
/**
* Compile a nested where clause.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function whereNested(Builder $query, $where)
{
// Here we will calculate what portion of the string we need to remove. If this
// is a join clause query, we need to remove the "on" portion of the SQL and
// if it is a normal query we need to take the leading "where" of queries.
$offset = $query instanceof JoinClause ? 3 : 6;
return '('.substr($this->compileWheres($where['query']), $offset).')';
}
/**
* Compile a where condition with a sub-select.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function whereSub(Builder $query, $where)
{
$select = $this->compileSelect($where['query']);
return $this->wrap($where['column']).' '.$where['operator']." ($select)";
}
/**
* Compile a where exists clause.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function whereExists(Builder $query, $where)
{
return 'exists ('.$this->compileSelect($where['query']).')';
}
/**
* Compile a where exists clause.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function whereNotExists(Builder $query, $where)
{
return 'not exists ('.$this->compileSelect($where['query']).')';
}
/**
* Compile a where row values condition.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function whereRowValues(Builder $query, $where)
{
$values = $this->parameterize($where['values']);
return '('.implode(', ', $where['columns']).') '.$where['operator'].' ('.$values.')';
}
/**
* Compile the "group by" portions of the query.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $groups
* @return string
*/
protected function compileGroups(Builder $query, $groups)
{
return 'group by '.$this->columnize($groups);
}
/**
* Compile the "having" portions of the query.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $havings
* @return string
*/
protected function compileHavings(Builder $query, $havings)
{
$sql = implode(' ', array_map([$this, 'compileHaving'], $havings));
return 'having '.$this->removeLeadingBoolean($sql);
}
/**
* Compile a single having clause.
*
* @param array $having
* @return string
*/
protected function compileHaving(array $having)
{
// If the having clause is "raw", we can just return the clause straight away
// without doing any more processing on it. Otherwise, we will compile the
// clause into SQL based on the components that make it up from builder.
if ($having['type'] === 'Raw') {
return $having['boolean'].' '.$having['sql'];
}
return $this->compileBasicHaving($having);
}
/**
* Compile a basic having clause.
*
* @param array $having
* @return string
*/
protected function compileBasicHaving($having)
{
$column = $this->wrap($having['column']);
$parameter = $this->parameter($having['value']);
return $having['boolean'].' '.$column.' '.$having['operator'].' '.$parameter;
}
/**
* Compile the "order by" portions of the query.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $orders
* @return string
*/
protected function compileOrders(Builder $query, $orders)
{
if (! empty($orders)) {
return 'order by '.implode(', ', $this->compileOrdersToArray($query, $orders));
}
return '';
}
/**
* Compile the query orders to an array.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $orders
* @return array
*/
protected function compileOrdersToArray(Builder $query, $orders)
{
return array_map(function ($order) {
return ! isset($order['sql'])
? $this->wrap($order['column']).' '.$order['direction']
: $order['sql'];
}, $orders);
}
/**
* Compile the random statement into SQL.
*
* @param string $seed
* @return string
*/
public function compileRandom($seed)
{
return 'RANDOM()';
}
/**
* Compile the "limit" portions of the query.
*
* @param \Illuminate\Database\Query\Builder $query
* @param int $limit
* @return string
*/
protected function compileLimit(Builder $query, $limit)
{
return 'limit '.(int) $limit;
}
/**
* Compile the "offset" portions of the query.
*
* @param \Illuminate\Database\Query\Builder $query
* @param int $offset
* @return string
*/
protected function compileOffset(Builder $query, $offset)
{
return 'offset '.(int) $offset;
}
/**
* Compile the "union" queries attached to the main query.
*
* @param \Illuminate\Database\Query\Builder $query
* @return string
*/
protected function compileUnions(Builder $query)
{
$sql = '';
foreach ($query->unions as $union) {
$sql .= $this->compileUnion($union);
}
if (! empty($query->unionOrders)) {
$sql .= ' '.$this->compileOrders($query, $query->unionOrders);
}
if (isset($query->unionLimit)) {
$sql .= ' '.$this->compileLimit($query, $query->unionLimit);
}
if (isset($query->unionOffset)) {
$sql .= ' '.$this->compileOffset($query, $query->unionOffset);
}
return ltrim($sql);
}
/**
* Compile a single union statement.
*
* @param array $union
* @return string
*/
protected function compileUnion(array $union)
{
$conjunction = $union['all'] ? ' union all ' : ' union ';
return $conjunction.$union['query']->toSql();
}
/**
* Compile an exists statement into SQL.
*
* @param \Illuminate\Database\Query\Builder $query
* @return string
*/
public function compileExists(Builder $query)
{
$select = $this->compileSelect($query);
return "select exists({$select}) as {$this->wrap('exists')}";
}
/**
* Compile an insert statement into SQL.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $values
* @return string
*/
public function compileInsert(Builder $query, array $values)
{
// Essentially we will force every insert to be treated as a batch insert which
// simply makes creating the SQL easier for us since we can utilize the same
// basic routine regardless of an amount of records given to us to insert.
$table = $this->wrapTable($query->from);
if (! is_array(reset($values))) {
$values = [$values];
}
$columns = $this->columnize(array_keys(reset($values)));
// We need to build a list of parameter place-holders of values that are bound
// to the query. Each insert should have the exact same amount of parameter
// bindings so we will loop through the record and parameterize them all.
$parameters = collect($values)->map(function ($record) {
return '('.$this->parameterize($record).')';
})->implode(', ');
return "insert into $table ($columns) values $parameters";
}
/**
* Compile an insert and get ID statement into SQL.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $values
* @param string $sequence
* @return string
*/
public function compileInsertGetId(Builder $query, $values, $sequence)
{
return $this->compileInsert($query, $values);
}
/**
* Compile an update statement into SQL.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $values
* @return string
*/
public function compileUpdate(Builder $query, $values)
{
$table = $this->wrapTable($query->from);
// Each one of the columns in the update statements needs to be wrapped in the
// keyword identifiers, also a place-holder needs to be created for each of
// the values in the list of bindings so we can make the sets statements.
$columns = collect($values)->map(function ($value, $key) {
return $this->wrap($key).' = '.$this->parameter($value);
})->implode(', ');
// If the query has any "join" clauses, we will setup the joins on the builder
// and compile them so we can attach them to this update, as update queries
// can get join statements to attach to other tables when they're needed.
$joins = '';
if (isset($query->joins)) {
$joins = ' '.$this->compileJoins($query, $query->joins);
}
// Of course, update queries may also be constrained by where clauses so we'll
// need to compile the where clauses and attach it to the query so only the
// intended records are updated by the SQL statements we generate to run.
$wheres = $this->compileWheres($query);
return trim("update {$table}{$joins} set $columns $wheres");
}
/**
* Prepare the bindings for an update statement.
*
* @param array $bindings
* @param array $values
* @return array
*/
public function prepareBindingsForUpdate(array $bindings, array $values)
{
$cleanBindings = Arr::except($bindings, ['join', 'select']);
return array_values(
array_merge($bindings['join'], $values, Arr::flatten($cleanBindings))
);
}
/**
* Compile a delete statement into SQL.
*
* @param \Illuminate\Database\Query\Builder $query
* @return string
*/
public function compileDelete(Builder $query)
{
$wheres = is_array($query->wheres) ? $this->compileWheres($query) : '';
return trim("delete from {$this->wrapTable($query->from)} $wheres");
}
/**
* Prepare the bindings for a delete statement.
*
* @param array $bindings
* @return array
*/
public function prepareBindingsForDelete(array $bindings)
{
return Arr::flatten($bindings);
}
/**
* Compile a truncate table statement into SQL.
*
* @param \Illuminate\Database\Query\Builder $query
* @return array
*/
public function compileTruncate(Builder $query)
{
return ['truncate '.$this->wrapTable($query->from) => []];
}
/**
* Compile the lock into SQL.
*
* @param \Illuminate\Database\Query\Builder $query
* @param bool|string $value
* @return string
*/
protected function compileLock(Builder $query, $value)
{
return is_string($value) ? $value : '';
}
/**
* Determine if the grammar supports savepoints.
*
* @return bool
*/
public function supportsSavepoints()
{
return true;
}
/**
* Compile the SQL statement to define a savepoint.
*
* @param string $name
* @return string
*/
public function compileSavepoint($name)
{
return 'SAVEPOINT '.$name;
}
/**
* Compile the SQL statement to execute a savepoint rollback.
*
* @param string $name
* @return string
*/
public function compileSavepointRollBack($name)
{
return 'ROLLBACK TO SAVEPOINT '.$name;
}
/**
* Concatenate an array of segments, removing empties.
*
* @param array $segments
* @return string
*/
protected function concatenate($segments)
{
return implode(' ', array_filter($segments, function ($value) {
return (string) $value !== '';
}));
}
/**
* Remove the leading boolean from a statement.
*
* @param string $value
* @return string
*/
protected function removeLeadingBoolean($value)
{
return preg_replace('/and |or /i', '', $value, 1);
}
/**
* Get the grammar specific operators.
*
* @return array
*/
public function getOperators()
{
return $this->operators;
}
}