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<?php
namespace Xgrz\Firebird\Query\Grammars;
use Illuminate\Database\Query\Builder;
use Illuminate\Database\Query\Grammars\Grammar;
use Illuminate\Support\Collection;
use Illuminate\Support\Str;
class FirebirdGrammar extends Grammar
{
/**
* The components that make up a select clause.
*
* @var string[]
*/
protected $selectComponents = [
'aggregate',
'columns',
'from',
'joins',
'wheres',
'groups',
'havings',
'orders',
// 'limit', - Handled in the compileColumns() method.
// 'offset', - Handled in the compileColumns() method.
'lock',
];
/**
* All of the available clause operators.
*
* @var array
*
* @link https://ib-aid.com/download/docs/firebird-language-reference-2.5/fblangref25-commons-predicates.html
*/
protected $operators = [
'=', '<', '>', '<=', '>=', '<>', '!=',
'like', 'not like', 'between', 'not between',
'containing', 'not containing', 'starting with', 'not starting with',
'similar to', 'not similar to', 'is distinct from', 'is not distinct from',
];
/**
* @param Builder $query
* @param array $columns
* @return string|null
*/
protected function compileColumns(Builder $query, $columns)
{
// See superclass.
if (! is_null($query->aggregate)) {
return;
}
// In Firebird, the correct syntax for limiting and offsetting rows is
// "select first [num_rows] skip [start_row] * from table". Laravel does
// not support adding components between the "select" keyword and the
// column names, so compile the limit and offset components here. Note
// that they are commented out in the $selectComponents class variable.
// Reference: http://mc-computing.com/Databases/Firebird/SQL.html
$select = 'select ';
if ($query->limit) {
$select .= $this->compileLimit($query, $query->limit).' ';
}
if ($query->offset) {
$select .= $this->compileOffset($query, $query->offset).' ';
}
if ($query->distinct) {
$select .= 'distinct ';
}
return $select.$this->columnize($columns);
}
/**
* 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 'first '.(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 'skip '.(int) $offset;
}
/**
* Compile the random statement into SQL.
*
* @param string $seed
* @return string
*/
public function compileRandom($seed)
{
return 'RAND()';
}
/**
* Compile an insert statement into SQL.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $values
* @return string
*/
public function compileInsert(Builder $query, array $values)
{
$table = $this->wrapTable($query->from);
if (empty($values)) {
return "insert into {$table} default values";
}
if (! is_array(array_first($values))) {
$values = [$values];
}
$columns = $this->columnize(array_keys(array_first($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 number of parameter
// bindings so we will loop through the record and parameterize them all.
$parameters = (new Collection($values))
->map(fn ($record) => '('.$this->parameterize($record).')')
->implode(', ');
return "insert into $table ($columns) values $parameters returning *";
}
/**
* Wrap a union subquery in parentheses.
*
* @param string $sql
* @return string
*/
protected function wrapUnion($sql)
{
return $sql;
}
/**
* 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 'EXTRACT('.$type.' FROM '.$this->wrap($where['column']).') '.$where['operator'].' '.$value;
}
/**
* Compile SQL statement for a stored procedure.
*
* @param \Illuminate\Database\Query\Builder $query
* @param string $procedure
* @param array $values
* @return string
*/
public function compileProcedure(Builder $query, $procedure, ?array $values = null)
{
$procedure = $this->wrap($procedure);
return $procedure.' ('.$this->parameterize($values).')';
}
/**
* Compile an aggregated select clause.
*
* @param \Illuminate\Database\Query\Builder $query
* @param array $aggregate
* @return string
*/
protected function compileAggregate(Builder $query, $aggregate)
{
// Wrap `aggregate` in double quotes to ensure the resultset returns the
// column name as a lowercase string. This resolves compatibility with
// the framework's paginator.
return Str::replaceLast(
'as aggregate', 'as "aggregate"', parent::compileAggregate($query, $aggregate)
);
}
}
|
