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Commit 81ee4583 authored by Bill Schaller's avatar Bill Schaller
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Simplified doModifyLimitQuery per @deeky666 comments, added test case for... 

Simplified doModifyLimitQuery per @deeky666 comments, added test case for orderby with parenthetical expression
parent 26938877
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Showing with 29 additions and 47 deletions
lib/Doctrine/DBAL/Platforms/SQLServer2012Platform.php
View file @ 81ee4583
......@@ -105,7 +105,7 @@ class SQLServer2012Platform extends SQLServer2008Platform
}
/**
* @inheritdoc
* {@inheritdoc}
*/
protected function doModifyLimitQuery($query, $limit, $offset = null)
{
......@@ -114,13 +114,14 @@ class SQLServer2012Platform extends SQLServer2008Platform
}
// Queries using OFFSET... FETCH MUST have an ORDER BY clause
if (!preg_match("/ORDER BY ([a-z0-9\.\[\], \t_]|[a-z_]+\([a-z0-9\.\[\], \t_]+\))+\s*$/i", $query)) {
$query .= " ORDER BY dctrn_ver";
$from = $this->findOuterFrom($query);
//TODO handle $from === false
$query = substr_replace($query, ", @@version as dctrn_ver", $from, 0);
// Find the position of the last instance of ORDER BY and ensure it is not within a parenthetical statement
$orderByPos = strripos($query, "ORDER BY");
if ($orderByPos === false
|| substr_count($query, "(", $orderByPos) - substr_count($query, ")", $orderByPos)
) {
// In another DBMS, we could do ORDER BY 0, but SQL Server gets angry if you use constant expressions in
// the order by list.
$query .= " ORDER BY (SELECT 0)";
}
if ($offset === null) {
......@@ -130,40 +131,12 @@ class SQLServer2012Platform extends SQLServer2008Platform
// This looks somewhat like MYSQL, but limit/offset are in inverse positions
// Supposedly SQL:2008 core standard.
// Per TSQL spec, FETCH NEXT n ROWS ONLY is not valid without OFFSET n ROWS.
$query .= " OFFSET " . (int)$offset . " ROWS";
$query .= " OFFSET " . (int) $offset . " ROWS";
if ($limit !== null) {
$query .= " FETCH NEXT " . (int)$limit . " ROWS ONLY";
$query .= " FETCH NEXT " . (int) $limit . " ROWS ONLY";
}
return $query;
}
/**
* recursive function to find the outermost FROM clause in a SELECT query
*
* @param string $query the SQL query
* @param int $pos position of previous FROM instance, if any
* @return bool|int
*/
private function findOuterFrom($query, $pos = 0)
{
$needle = " from ";
if (false === ($found = stripos($query, $needle, $pos))) {
return false;
}
$before = substr_count($query, "(", 0, $found) - substr_count($query, ")", 0, $found);
$after = substr_count($query, "(", $found + strlen($needle)) - substr_count(
$query,
")",
$found + strlen($needle)
);
// $needle was found outside any parens.
if (!$before && !$after) {
return $found;
}
return $this->findOuterFrom($query, $found + strlen($needle));
}
}
tests/Doctrine/Tests/DBAL/Platforms/SQLServer2012PlatformTest.php
View file @ 81ee4583
......@@ -47,13 +47,13 @@ class SQLServer2012PlatformTest extends AbstractSQLServerPlatformTestCase
public function testModifyLimitQuery()
{
$sql = $this->_platform->modifyLimitQuery('SELECT * FROM user', 10, 0);
$this->assertEquals('SELECT *, @@version as dctrn_ver FROM user ORDER BY dctrn_ver OFFSET 0 ROWS FETCH NEXT 10 ROWS ONLY', $sql);
$this->assertEquals('SELECT * FROM user ORDER BY (SELECT 0) OFFSET 0 ROWS FETCH NEXT 10 ROWS ONLY', $sql);
}
public function testModifyLimitQueryWithEmptyOffset()
{
$sql = $this->_platform->modifyLimitQuery('SELECT * FROM user', 10);
$this->assertEquals('SELECT *, @@version as dctrn_ver FROM user ORDER BY dctrn_ver OFFSET 0 ROWS FETCH NEXT 10 ROWS ONLY', $sql);
$this->assertEquals('SELECT * FROM user ORDER BY (SELECT 0) OFFSET 0 ROWS FETCH NEXT 10 ROWS ONLY', $sql);
}
public function testModifyLimitQueryWithOffset()
......@@ -89,7 +89,7 @@ class SQLServer2012PlatformTest extends AbstractSQLServerPlatformTestCase
public function testModifyLimitQueryWithSubSelect()
{
$sql = $this->_platform->modifyLimitQuery('SELECT * FROM (SELECT u.id as uid, u.name as uname) dctrn_result', 10);
$this->assertEquals('SELECT *, @@version as dctrn_ver FROM (SELECT u.id as uid, u.name as uname) dctrn_result ORDER BY dctrn_ver OFFSET 0 ROWS FETCH NEXT 10 ROWS ONLY', $sql);
$this->assertEquals('SELECT * FROM (SELECT u.id as uid, u.name as uname) dctrn_result ORDER BY (SELECT 0) OFFSET 0 ROWS FETCH NEXT 10 ROWS ONLY', $sql);
}
public function testModifyLimitQueryWithSubSelectAndOrder()
......@@ -116,7 +116,7 @@ class SQLServer2012PlatformTest extends AbstractSQLServerPlatformTestCase
public function testModifyLimitQueryWithFromColumnNames()
{
$sql = $this->_platform->modifyLimitQuery('SELECT a.fromFoo, fromBar FROM foo', 10);
$this->assertEquals('SELECT a.fromFoo, fromBar, @@version as dctrn_ver FROM foo ORDER BY dctrn_ver OFFSET 0 ROWS FETCH NEXT 10 ROWS ONLY', $sql);
$this->assertEquals('SELECT a.fromFoo, fromBar FROM foo ORDER BY (SELECT 0) OFFSET 0 ROWS FETCH NEXT 10 ROWS ONLY', $sql);
}
/**
......@@ -131,11 +131,11 @@ class SQLServer2012PlatformTest extends AbstractSQLServerPlatformTestCase
$sql = $this->_platform->modifyLimitQuery($query, 10);
$expected = 'SELECT table1.column1, table2.column2, table3.column3, table4.column4, table5.column5, table6.column6, table7.column7, table8.column8, @@version as dctrn_ver FROM table1, table2, table3, table4, table5, table6, table7, table8 ';
$expected = 'SELECT table1.column1, table2.column2, table3.column3, table4.column4, table5.column5, table6.column6, table7.column7, table8.column8 FROM table1, table2, table3, table4, table5, table6, table7, table8 ';
$expected.= 'WHERE (table1.column1 = table2.column2) AND (table1.column1 = table3.column3) AND (table1.column1 = table4.column4) AND (table1.column1 = table5.column5) AND (table1.column1 = table6.column6) AND (table1.column1 = table7.column7) AND (table1.column1 = table8.column8) AND (table2.column2 = table3.column3) AND (table2.column2 = table4.column4) AND (table2.column2 = table5.column5) AND (table2.column2 = table6.column6) ';
$expected.= 'AND (table2.column2 = table7.column7) AND (table2.column2 = table8.column8) AND (table3.column3 = table4.column4) AND (table3.column3 = table5.column5) AND (table3.column3 = table6.column6) AND (table3.column3 = table7.column7) AND (table3.column3 = table8.column8) AND (table4.column4 = table5.column5) AND (table4.column4 = table6.column6) AND (table4.column4 = table7.column7) AND (table4.column4 = table8.column8) ';
$expected.= 'AND (table5.column5 = table6.column6) AND (table5.column5 = table7.column7) AND (table5.column5 = table8.column8) AND (table6.column6 = table7.column7) AND (table6.column6 = table8.column8) AND (table7.column7 = table8.column8) ';
$expected.= 'ORDER BY dctrn_ver OFFSET 0 ROWS FETCH NEXT 10 ROWS ONLY';
$expected.= 'ORDER BY (SELECT 0) OFFSET 0 ROWS FETCH NEXT 10 ROWS ONLY';
$this->assertEquals($expected, $sql);
......@@ -175,10 +175,10 @@ class SQLServer2012PlatformTest extends AbstractSQLServerPlatformTestCase
"u.id, " .
"(u.foo/2) foodiv, " .
"CONCAT(u.bar, u.baz) barbaz, " .
"(SELECT (SELECT COUNT(*) FROM login l WHERE l.profile_id = p.id) FROM profile p WHERE p.user_id = u.id) login_count, @@version as dctrn_ver " .
"(SELECT (SELECT COUNT(*) FROM login l WHERE l.profile_id = p.id) FROM profile p WHERE p.user_id = u.id) login_count " .
"FROM user u " .
"WHERE u.status = 'disabled' " .
"ORDER BY dctrn_ver OFFSET 0 ROWS FETCH NEXT 10 ROWS ONLY",
"ORDER BY (SELECT 0) OFFSET 0 ROWS FETCH NEXT 10 ROWS ONLY",
$sql
);
}
......@@ -247,7 +247,7 @@ class SQLServer2012PlatformTest extends AbstractSQLServerPlatformTestCase
{
$sql = $this->_platform->modifyLimitQuery("SELECT DISTINCT id_0 FROM (SELECT k0_.id AS id_0 FROM key_measure k0_ WHERE (k0_.id_zone in(2))) dctrn_result", 10);
$expected = "SELECT DISTINCT id_0, @@version as dctrn_ver FROM (SELECT k0_.id AS id_0 FROM key_measure k0_ WHERE (k0_.id_zone in(2))) dctrn_result ORDER BY dctrn_ver OFFSET 0 ROWS FETCH NEXT 10 ROWS ONLY";
$expected = "SELECT DISTINCT id_0 FROM (SELECT k0_.id AS id_0 FROM key_measure k0_ WHERE (k0_.id_zone in(2))) dctrn_result ORDER BY (SELECT 0) OFFSET 0 ROWS FETCH NEXT 10 ROWS ONLY";
$this->assertEquals($sql, $expected);
}
......@@ -260,4 +260,13 @@ class SQLServer2012PlatformTest extends AbstractSQLServerPlatformTestCase
$this->assertEquals($sql, $expected);
}
public function testModifyLimitQueryWithComplexOrderByExpression()
{
$sql = $this->_platform->modifyLimitQuery("SELECT * FROM table ORDER BY (table.x * table.y) DESC", 10);
$expected = "SELECT * FROM table ORDER BY (table.x * table.y) DESC OFFSET 0 ROWS FETCH NEXT 10 ROWS ONLY";
$this->assertEquals($sql, $expected);
}
}
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