<?php
namespace Illuminate\Database\Query\Grammars;
use Illuminate\Database\Grammar as BaseGrammar;
use Illuminate\Database\Query\Builder;
use Illuminate\Database\Query\JoinClause;
use Illuminate\Support\Arr;
use Illuminate\Support\Str;
use RuntimeException;
class Grammar extends BaseGrammar
{
/**
* The grammar specific operators.
*
* @var array
*/
protected $operators = [];
/**
* The components that make up a select clause.
*
* @var string[]
*/
protected $selectComponents = [
'aggregate',
'columns',
'from',
'joins',
'wheres',
'groups',
'havings',
'orders',
'limit',
'offset',
'lock',
];
/**
* Compile a select query into SQL.
*
* @param \Illuminate\Database\Query\Builder $query
* @return string
*/
public function compileSelect(Builder $query)
{
if (($query->unions || $query->havings) && $query->aggregate) {
return $this->compileUnionAggregate($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))
);
if ($query->unions) {
$sql = $this->wrapUnion($sql).' '.$this->compileUnions($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 $component) {
if (isset($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 (is_array($query->distinct)) {
$column = 'distinct '.$this->columnize($query->distinct);
} elseif ($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;
}
if ($query->distinct) {
$select = 'select distinct ';
} else {
$select = '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);
$tableAndNestedJoins = is_null($join->joins) ? $table : '('.$table.$nestedJoins.')';
return trim("{$join->type} join {$tableAndNestedJoins} {$this->compileWheres($join)}");
})->implode(' ');
}
/**
* Compile the "where" portions of the query.
*
* @param \Illuminate\Database\Query\Builder $query
* @return string
*/
public 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']);
$operator = str_replace('?', '??', $where['operator']);
return $this->wrap($where['column']).' '.$operator.' '.$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 not in raw" clause.
*
* For safety, whereIntegerInRaw ensures this method is only used with integer values.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function whereNotInRaw(Builder $query, $where)
{
if (! empty($where['values'])) {
return $this->wrap($where['column']).' not in ('.implode(', ', $where['values']).')';
}
return '1 = 1';
}
/**
* Compile a "where in raw" clause.
*
* For safety, whereIntegerInRaw ensures this method is only used with integer values.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function whereInRaw(Builder $query, $where)
{
if (! empty($where['values'])) {
return $this->wrap($where['column']).' in ('.implode(', ', $where['values']).')';
}
return '0 = 1';
}
/**
* 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';
$min = $this->parameter(reset($where['values']));
$max = $this->parameter(end($where['values']));
return $this->wrap($where['column']).' '.$between.' '.$min.' and '.$max;
}
/**
* Compile a "between" where clause.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function whereBetweenColumns(Builder $query, $where)
{
$between = $where['not'] ? 'not between' : 'between';
$min = $this->wrap(reset($where['values']));
$max = $this->wrap(end($where['values']));
return $this->wrap($where['column']).' '.$between.' '.$min.' and '.$max;
}
/**
* 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)
{
$columns = $this->columnize($where['columns']);
$values = $this->parameterize($where['values']);
return '('.$columns.') '.$where['operator'].' ('.$values.')';
}
/**
* Compile a "where JSON boolean" clause.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function whereJsonBoolean(Builder $query, $where)
{
$column = $this->wrapJsonBooleanSelector($where['column']);
$value = $this->wrapJsonBooleanValue(
$this->parameter($where['value'])
);
return $column.' '.$where['operator'].' '.$value;
}
/**
* Compile a "where JSON contains" clause.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function whereJsonContains(Builder $query, $where)
{
$not = $where['not'] ? 'not ' : '';
return $not.$this->compileJsonContains(
$where['column'], $this->parameter($where['value'])
);
}
/**
* Compile a "JSON contains" statement into SQL.
*
* @param string $column
* @param string $value
* @return string
*
* @throws \RuntimeException
*/
protected function compileJsonContains($column, $value)
{
throw new RuntimeException('This database engine does not support JSON contains operations.');
}
/**
* Prepare the binding for a "JSON contains" statement.
*
* @param mixed $binding
* @return string
*/
public function prepareBindingForJsonContains($binding)
{
return json_encode($binding);
}
/**
* Compile a "where JSON length" clause.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $where
* @return string
*/
protected function whereJsonLength(Builder $query, $where)
{
return $this->compileJsonLength(
$where['column'], $where['operator'], $this->parameter($where['value'])
);
}
/**
* Compile a "JSON length" statement into SQL.
*
* @param string $column
* @param string $operator
* @param string $value
* @return string
*
* @throws \RuntimeException
*/
protected function compileJsonLength($column, $operator, $value)
{
throw new RuntimeException('This database engine does not support JSON length operations.');
}
/**
* 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'];
} elseif ($having['type'] === 'between') {
return $this->compileHavingBetween($having);
}
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 a "between" having clause.
*
* @param array $having
* @return string
*/
protected function compileHavingBetween($having)
{
$between = $having['not'] ? 'not between' : 'between';
$column = $this->wrap($having['column']);
$min = $this->parameter(head($having['values']));
$max = $this->parameter(last($having['values']));
return $having['boolean'].' '.$column.' '.$between.' '.$min.' and '.$max;
}
/**
* 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 $order['sql'] ?? $this->wrap($order['column']).' '.$order['direction'];
}, $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 $conjunction.$this->wrapUnion($union['query']->toSql());
}
/**
* Wrap a union subquery in parentheses.
*
* @param string $sql
* @return string
*/
protected function wrapUnion($sql)
{
return '('.$sql.')';
}
/**
* Compile a union aggregate query into SQL.
*
* @param \Illuminate\Database\Query\Builder $query
* @return string
*/
protected function compileUnionAggregate(Builder $query)
{
$sql = $this->compileAggregate($query, $query->aggregate);
$query->aggregate = null;
return $sql.' from ('.$this->compileSelect($query).') as '.$this->wrapTable('temp_table');
}
/**
* 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 (empty($values)) {
return "insert into {$table} default values";
}
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 ignore statement into SQL.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $values
* @return string
*
* @throws \RuntimeException
*/
public function compileInsertOrIgnore(Builder $query, array $values)
{
throw new RuntimeException('This database engine does not support inserting while ignoring errors.');
}
/**
* 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 insert statement using a subquery into SQL.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $columns
* @param string $sql
* @return string
*/
public function compileInsertUsing(Builder $query, array $columns, string $sql)
{
return "insert into {$this->wrapTable($query->from)} ({$this->columnize($columns)}) $sql";
}
/**
* Compile an update statement into SQL.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $values
* @return string
*/
public function compileUpdate(Builder $query, array $values)
{
$table = $this->wrapTable($query->from);
$columns = $this->compileUpdateColumns($query, $values);
$where = $this->compileWheres($query);
return trim(
isset($query->joins)
? $this->compileUpdateWithJoins($query, $table, $columns, $where)
: $this->compileUpdateWithoutJoins($query, $table, $columns, $where)
);
}
/**
* Compile the columns for an update statement.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $values
* @return string
*/
protected function compileUpdateColumns(Builder $query, array $values)
{
return collect($values)->map(function ($value, $key) {
return $this->wrap($key).' = '.$this->parameter($value);
})->implode(', ');
}
/**
* Compile an update statement without joins into SQL.
*
* @param \Illuminate\Database\Query\Builder $query
* @param string $table
* @param string $columns
* @param string $where
* @return string
*/
protected function compileUpdateWithoutJoins(Builder $query, $table, $columns, $where)
{
return "update {$table} set {$columns} {$where}";
}
/**
* Compile an update statement with joins into SQL.
*
* @param \Illuminate\Database\Query\Builder $query
* @param string $table
* @param string $columns
* @param string $where
* @return string
*/
protected function compileUpdateWithJoins(Builder $query, $table, $columns, $where)
{
$joins = $this->compileJoins($query, $query->joins);
return "update {$table} {$joins} set {$columns} {$where}";
}
/**
* Compile an "upsert" statement into SQL.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $values
* @param array $uniqueBy
* @param array $update
* @return string
*
* @throws \RuntimeException
*/
public function compileUpsert(Builder $query, array $values, array $uniqueBy, array $update)
{
throw new RuntimeException('This database engine does not support upserts.');
}
/**
* 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, ['select', 'join']);
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)
{
$table = $this->wrapTable($query->from);
$where = $this->compileWheres($query);
return trim(
isset($query->joins)
? $this->compileDeleteWithJoins($query, $table, $where)
: $this->compileDeleteWithoutJoins($query, $table, $where)
);
}
/**
* Compile a delete statement without joins into SQL.
*
* @param \Illuminate\Database\Query\Builder $query
* @param string $table
* @param string $where
* @return string
*/
protected function compileDeleteWithoutJoins(Builder $query, $table, $where)
{
return "delete from {$table} {$where}";
}
/**
* Compile a delete statement with joins into SQL.
*
* @param \Illuminate\Database\Query\Builder $query
* @param string $table
* @param string $where
* @return string
*/
protected function compileDeleteWithJoins(Builder $query, $table, $where)
{
$alias = last(explode(' as ', $table));
$joins = $this->compileJoins($query, $query->joins);
return "delete {$alias} from {$table} {$joins} {$where}";
}
/**
* Prepare the bindings for a delete statement.
*
* @param array $bindings
* @return array
*/
public function prepareBindingsForDelete(array $bindings)
{
return Arr::flatten(
Arr::except($bindings, 'select')
);
}
/**
* Compile a truncate table statement into SQL.
*
* @param \Illuminate\Database\Query\Builder $query
* @return array
*/
public function compileTruncate(Builder $query)
{
return ['truncate table '.$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;
}
/**
* Wrap a value in keyword identifiers.
*
* @param \Illuminate\Database\Query\Expression|string $value
* @param bool $prefixAlias
* @return string
*/
public function wrap($value, $prefixAlias = false)
{
if ($this->isExpression($value)) {
return $this->getValue($value);
}
// If the value being wrapped has a column alias we will need to separate out
// the pieces so we can wrap each of the segments of the expression on its
// own, and then join these both back together using the "as" connector.
if (stripos($value, ' as ') !== false) {
return $this->wrapAliasedValue($value, $prefixAlias);
}
// If the given value is a JSON selector we will wrap it differently than a
// traditional value. We will need to split this path and wrap each part
// wrapped, etc. Otherwise, we will simply wrap the value as a string.
if ($this->isJsonSelector($value)) {
return $this->wrapJsonSelector($value);
}
return $this->wrapSegments(explode('.', $value));
}
/**
* Wrap the given JSON selector.
*
* @param string $value
* @return string
*
* @throws \RuntimeException
*/
protected function wrapJsonSelector($value)
{
throw new RuntimeException('This database engine does not support JSON operations.');
}
/**
* Wrap the given JSON selector for boolean values.
*
* @param string $value
* @return string
*/
protected function wrapJsonBooleanSelector($value)
{
return $this->wrapJsonSelector($value);
}
/**
* Wrap the given JSON boolean value.
*
* @param string $value
* @return string
*/
protected function wrapJsonBooleanValue($value)
{
return $value;
}
/**
* Split the given JSON selector into the field and the optional path and wrap them separately.
*
* @param string $column
* @return array
*/
protected function wrapJsonFieldAndPath($column)
{
$parts = explode('->', $column, 2);
$field = $this->wrap($parts[0]);
$path = count($parts) > 1 ? ', '.$this->wrapJsonPath($parts[1], '->') : '';
return [$field, $path];
}
/**
* Wrap the given JSON path.
*
* @param string $value
* @param string $delimiter
* @return string
*/
protected function wrapJsonPath($value, $delimiter = '->')
{
$value = preg_replace("/([\\\\]+)?\\'/", "''", $value);
return '\'$."'.str_replace($delimiter, '"."', $value).'"\'';
}
/**
* Determine if the given string is a JSON selector.
*
* @param string $value
* @return bool
*/
protected function isJsonSelector($value)
{
return Str::contains($value, '->');
}
/**
* 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;
}
}