457 lines
12 KiB
PHP
Executable File
457 lines
12 KiB
PHP
Executable File
<?php
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namespace Illuminate\Database\Query\Grammars;
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use Illuminate\Database\Query\Builder;
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use Illuminate\Support\Arr;
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use Illuminate\Support\Str;
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class SqlServerGrammar extends Grammar
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{
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/**
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* All of the available clause operators.
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*
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* @var array
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*/
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protected $operators = [
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'=', '<', '>', '<=', '>=', '!<', '!>', '<>', '!=',
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'like', 'not like', 'ilike',
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'&', '&=', '|', '|=', '^', '^=',
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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 $query
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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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if (! $query->offset) {
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return parent::compileSelect($query);
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}
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// If an offset is present on the query, we will need to wrap the query in
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// a big "ANSI" offset syntax block. This is very nasty compared to the
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// other database systems but is necessary for implementing features.
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if (is_null($query->columns)) {
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$query->columns = ['*'];
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}
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return $this->compileAnsiOffset(
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$query, $this->compileComponents($query)
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);
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}
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/**
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* Compile the "select *" portion of the query.
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*
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* @param \Illuminate\Database\Query\Builder $query
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* @param array $columns
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* @return string|null
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*/
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protected function compileColumns(Builder $query, $columns)
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{
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if (! is_null($query->aggregate)) {
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return;
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}
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$select = $query->distinct ? 'select distinct ' : 'select ';
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// If there is a limit on the query, but not an offset, we will add the top
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// clause to the query, which serves as a "limit" type clause within the
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// SQL Server system similar to the limit keywords available in MySQL.
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if ($query->limit > 0 && $query->offset <= 0) {
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$select .= 'top '.$query->limit.' ';
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}
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return $select.$this->columnize($columns);
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}
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/**
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* Compile the "from" portion of the query.
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*
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* @param \Illuminate\Database\Query\Builder $query
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* @param string $table
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* @return string
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*/
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protected function compileFrom(Builder $query, $table)
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{
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$from = parent::compileFrom($query, $table);
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if (is_string($query->lock)) {
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return $from.' '.$query->lock;
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}
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if (! is_null($query->lock)) {
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return $from.' with(rowlock,'.($query->lock ? 'updlock,' : '').'holdlock)';
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}
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return $from;
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}
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/**
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* Compile a "where date" clause.
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*
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* @param \Illuminate\Database\Query\Builder $query
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* @param array $where
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* @return string
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*/
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protected function whereDate(Builder $query, $where)
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{
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$value = $this->parameter($where['value']);
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return 'cast('.$this->wrap($where['column']).' as date) '.$where['operator'].' '.$value;
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}
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/**
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* Compile a "where time" clause.
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*
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* @param \Illuminate\Database\Query\Builder $query
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* @param array $where
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* @return string
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*/
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protected function whereTime(Builder $query, $where)
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{
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$value = $this->parameter($where['value']);
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return 'cast('.$this->wrap($where['column']).' as time) '.$where['operator'].' '.$value;
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}
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/**
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* Compile a "JSON contains" statement into SQL.
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*
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* @param string $column
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* @param string $value
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* @return string
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*/
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protected function compileJsonContains($column, $value)
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{
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[$field, $path] = $this->wrapJsonFieldAndPath($column);
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return $value.' in (select [value] from openjson('.$field.$path.'))';
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}
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/**
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* Prepare the binding for a "JSON contains" statement.
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*
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* @param mixed $binding
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* @return string
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*/
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public function prepareBindingForJsonContains($binding)
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{
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return is_bool($binding) ? json_encode($binding) : $binding;
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}
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/**
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* Compile a "JSON length" statement into SQL.
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*
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* @param string $column
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* @param string $operator
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* @param string $value
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* @return string
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*/
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protected function compileJsonLength($column, $operator, $value)
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{
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[$field, $path] = $this->wrapJsonFieldAndPath($column);
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return '(select count(*) from openjson('.$field.$path.')) '.$operator.' '.$value;
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}
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/**
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* Create a full ANSI offset clause for the query.
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*
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* @param \Illuminate\Database\Query\Builder $query
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* @param array $components
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* @return string
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*/
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protected function compileAnsiOffset(Builder $query, $components)
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{
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// An ORDER BY clause is required to make this offset query work, so if one does
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// not exist we'll just create a dummy clause to trick the database and so it
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// does not complain about the queries for not having an "order by" clause.
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if (empty($components['orders'])) {
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$components['orders'] = 'order by (select 0)';
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}
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// We need to add the row number to the query so we can compare it to the offset
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// and limit values given for the statements. So we will add an expression to
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// the "select" that will give back the row numbers on each of the records.
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$components['columns'] .= $this->compileOver($components['orders']);
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unset($components['orders']);
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// Next we need to calculate the constraints that should be placed on the query
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// to get the right offset and limit from our query but if there is no limit
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// set we will just handle the offset only since that is all that matters.
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$sql = $this->concatenate($components);
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return $this->compileTableExpression($sql, $query);
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}
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/**
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* Compile the over statement for a table expression.
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*
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* @param string $orderings
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* @return string
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*/
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protected function compileOver($orderings)
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{
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return ", row_number() over ({$orderings}) as row_num";
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}
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/**
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* Compile a common table expression for a query.
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*
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* @param string $sql
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* @param \Illuminate\Database\Query\Builder $query
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* @return string
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*/
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protected function compileTableExpression($sql, $query)
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{
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$constraint = $this->compileRowConstraint($query);
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return "select * from ({$sql}) as temp_table where row_num {$constraint} order by row_num";
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}
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/**
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* Compile the limit / offset row constraint for a query.
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*
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* @param \Illuminate\Database\Query\Builder $query
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* @return string
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*/
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protected function compileRowConstraint($query)
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{
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$start = $query->offset + 1;
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if ($query->limit > 0) {
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$finish = $query->offset + $query->limit;
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return "between {$start} and {$finish}";
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}
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return ">= {$start}";
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}
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/**
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* Compile a delete statement without joins into SQL.
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*
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* @param \Illuminate\Database\Query\Builder $query
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* @param string $table
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* @param string $where
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* @return string
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*/
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protected function compileDeleteWithoutJoins(Builder $query, $table, $where)
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{
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$sql = parent::compileDeleteWithoutJoins($query, $table, $where);
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return ! is_null($query->limit) && $query->limit > 0 && $query->offset <= 0
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? Str::replaceFirst('delete', 'delete top ('.$query->limit.')', $sql)
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: $sql;
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}
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/**
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* Compile the random statement into SQL.
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*
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* @param string $seed
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* @return string
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*/
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public function compileRandom($seed)
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{
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return 'NEWID()';
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}
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/**
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* Compile the "limit" portions of the query.
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*
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* @param \Illuminate\Database\Query\Builder $query
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* @param int $limit
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* @return string
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*/
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protected function compileLimit(Builder $query, $limit)
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{
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return '';
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}
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/**
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* Compile the "offset" portions of the query.
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*
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* @param \Illuminate\Database\Query\Builder $query
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* @param int $offset
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* @return string
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*/
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protected function compileOffset(Builder $query, $offset)
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{
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return '';
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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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return '';
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}
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/**
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* Wrap a union subquery in parentheses.
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*
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* @param string $sql
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* @return string
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*/
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protected function wrapUnion($sql)
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{
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return 'select * from ('.$sql.') as '.$this->wrapTable('temp_table');
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}
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/**
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* Compile an exists 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 compileExists(Builder $query)
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{
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$existsQuery = clone $query;
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$existsQuery->columns = [];
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return $this->compileSelect($existsQuery->selectRaw('1 [exists]')->limit(1));
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}
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/**
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* Compile an update statement with joins into SQL.
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*
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* @param \Illuminate\Database\Query\Builder $query
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* @param string $table
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* @param string $columns
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* @param string $where
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* @return string
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*/
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protected function compileUpdateWithJoins(Builder $query, $table, $columns, $where)
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{
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$alias = last(explode(' as ', $table));
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$joins = $this->compileJoins($query, $query->joins);
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return "update {$alias} set {$columns} from {$table} {$joins} {$where}";
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}
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/**
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* Prepare the bindings for an update statement.
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*
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* @param array $bindings
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* @param array $values
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* @return array
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*/
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public function prepareBindingsForUpdate(array $bindings, array $values)
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{
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$cleanBindings = Arr::except($bindings, 'select');
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return array_values(
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array_merge($values, Arr::flatten($cleanBindings))
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);
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}
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/**
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* Compile the SQL statement to define a savepoint.
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*
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* @param string $name
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* @return string
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*/
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public function compileSavepoint($name)
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{
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return 'SAVE TRANSACTION '.$name;
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}
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/**
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* Compile the SQL statement to execute a savepoint rollback.
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*
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* @param string $name
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* @return string
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*/
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public function compileSavepointRollBack($name)
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{
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return 'ROLLBACK TRANSACTION '.$name;
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}
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/**
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* Get the format for database stored dates.
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*
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* @return string
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*/
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public function getDateFormat()
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{
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return 'Y-m-d H:i:s.v';
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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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return $value === '*' ? $value : '['.str_replace(']', ']]', $value).']';
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}
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/**
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* Wrap the given JSON selector.
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*
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* @param string $value
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* @return string
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*/
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protected function wrapJsonSelector($value)
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{
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[$field, $path] = $this->wrapJsonFieldAndPath($value);
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return 'json_value('.$field.$path.')';
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}
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/**
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* Wrap the given JSON boolean value.
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*
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* @param string $value
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* @return string
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*/
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protected function wrapJsonBooleanValue($value)
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{
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return "'".$value."'";
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}
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/**
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* Wrap a table in keyword identifiers.
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*
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* @param \Illuminate\Database\Query\Expression|string $table
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* @return string
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*/
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public function wrapTable($table)
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{
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if (! $this->isExpression($table)) {
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return $this->wrapTableValuedFunction(parent::wrapTable($table));
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}
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return $this->getValue($table);
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}
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/**
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* Wrap a table in keyword identifiers.
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*
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* @param string $table
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* @return string
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*/
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protected function wrapTableValuedFunction($table)
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{
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if (preg_match('/^(.+?)(\(.*?\))]$/', $table, $matches) === 1) {
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$table = $matches[1].']'.$matches[2];
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}
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return $table;
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}
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}
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