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Fix broken clause order validation
Fix #113 Signed-off-by: Deven Bansod <devenbansod.bits@gmail.com>
1 parent 4cd61e0 commit 71aa13c

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4 files changed

+28
-11
lines changed

4 files changed

+28
-11
lines changed

‎src/Statement.php‎

Lines changed: 25 additions & 11 deletions
Original file line numberDiff line numberDiff line change
@@ -451,16 +451,26 @@ public function validateClauseOrder($parser, $list)
451451

452452
/**
453453
* For tracking JOIN clauses in a query
454-
* 0 - JOIN not found till now
455-
* 1 - JOIN has been found
456-
* 2 - A Non-JOIN clause has been found
457-
* after a previously found JOIN clause.
454+
* = 0 - JOIN not found till now
455+
* > 0 - Index of first JOIN clause in the statement
458456
*
459457
* @var int
460458
*/
461-
$joinStart = 0;
459+
$minJoin = 0;
460+
461+
/**
462+
* For tracking JOIN clauses in a query
463+
* = 0 - JOIN not found till now
464+
* > 0 - Index of last JOIN clause
465+
* (which appears together with other JOINs)
466+
* in the statement
467+
*
468+
* @var int
469+
*/
470+
$maxJoin = 0;
462471

463472
$error = 0;
473+
$lastIdx = 0;
464474
foreach ($clauses as $clauseType => $index) {
465475
$clauseStartIdx = Utils\Query::getClauseStartOffset(
466476
$this,
@@ -470,17 +480,19 @@ public function validateClauseOrder($parser, $list)
470480

471481
// Handle ordering of Multiple Joins in a query
472482
if ($clauseStartIdx != -1) {
473-
if ($joinStart == 0 && stripos($clauseType, 'JOIN') !== false) {
474-
$joinStart = 1;
475-
} elseif ($joinStart == 1 && stripos($clauseType, 'JOIN') === false) {
476-
$joinStart = 2;
477-
} elseif ($joinStart == 2 && stripos($clauseType, 'JOIN') !== false) {
483+
if ($minJoin === 0 && stripos($clauseType, 'JOIN')) {
484+
// First JOIN clause is detected
485+
$minJoin = $maxJoin = $clauseStartIdx;
486+
} elseif ($minJoin !== 0 && ! stripos($clauseType, 'JOIN')) {
487+
// After a previous JOIN clause, a non-JOIN clause has been detected
488+
$maxJoin = $lastIdx;
489+
} elseif ($maxJoin < $clauseStartIdx && stripos($clauseType, 'JOIN')) {
478490
$error = 1;
479491
}
480492
}
481493

482494
if ($clauseStartIdx != -1 && $clauseStartIdx < $minIdx) {
483-
if ($joinStart == 0 || ($joinStart == 2 && $error = 1)) {
495+
if ($minJoin === 0 || $error === 1) {
484496
$token = $list->tokens[$clauseStartIdx];
485497
$parser->error(
486498
'Unexpected ordering of clauses.',
@@ -493,6 +505,8 @@ public function validateClauseOrder($parser, $list)
493505
} elseif ($clauseStartIdx != -1) {
494506
$minIdx = $clauseStartIdx;
495507
}
508+
509+
$lastIdx = ($clauseStartIdx !== -1) ? $clauseStartIdx : $lastIdx;
496510
}
497511

498512
return true;

‎tests/Parser/SelectStatementTest.php‎

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -63,6 +63,7 @@ public function testSelectProvider()
6363
array('parser/parseSelectJoinMultiple'),
6464
array('parser/parseSelectJoinMultiple2'),
6565
array('parser/parseSelectWrongOrder'),
66+
array('parser/parseSelectWrongOrder2'),
6667
array('parser/parseSelectEndOptions1'),
6768
array('parser/parseSelectEndOptions2'),
6869
array('parser/parseSelectEndOptionsErr'),

‎tests/data/parser/parseSelectWrongOrder2.in‎

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1 @@
1+
SELECT DISTINCT * FROM tbl1 INNER JOIN tbl2 ON id1 = id2 WHERE 1=1 LEFT OUTER JOIN l3;

‎tests/data/parser/parseSelectWrongOrder2.out‎

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1 @@
1+
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