Using the usual parsing method for transactions.

Author: udan11

src/Parser.php

@@ -436,6 +436,9 @@ public function parse()
                         $this->statements[] = $statement;
                     } elseif ($statement->type === TransactionStatement::TYPE_END) {
                         if ($lastTransaction === null) {
+                            // Even though an error occurred, the query is being
+                            // saved.
+                            $this->statements[] = $statement;
                             $this->error(
                                 __('No transaction was previously started.'),
                                 $token

src/Statement.php

@@ -188,7 +188,7 @@ public function parse(Parser $parser, TokensList $list)
          * default.
          * @var bool $parsedOptions
          */
-        $parsedOptions = !empty(static::$OPTIONS) ? false : true;
+        $parsedOptions = empty(static::$OPTIONS);
 
         for (; $list->idx < $list->count; ++$list->idx) {
             /**
@@ -257,7 +257,10 @@ public function parse(Parser $parser, TokensList $list)
                 }
                 $parsedBeginning = true;
                 if (!$parsedOptions) {
-                    ++$list->idx; // Skipping keyword.
+                    if (empty(static::$OPTIONS[$token->value])) {
+                        // Skipping keyword because if it is not a option.
+                        ++$list->idx;
+                    }
                     $this->options = OptionsArray::parse(
                         $parser,
                         $list,
@@ -276,7 +279,7 @@ public function parse(Parser $parser, TokensList $list)
 
             // Parsing this keyword.
             if ($class !== null) {
-                ++$list->idx; // Skipping keyword.
+                ++$list->idx; // Skipping keyword or last option.
                 $this->$field = $class::parse($parser, $list, $options);
             }
 

src/Statements/TransactionStatement.php

@@ -88,11 +88,7 @@ class TransactionStatement extends Statement
      */
     public function parse(Parser $parser, TokensList $list)
     {
-        $this->options = OptionsArray::parse(
-            $parser,
-            $list,
-            static::$OPTIONS
-        );
+        parent::parse($parser, $list);
 
         // Checks the type of this query.
         if (($this->options->has('START TRANSACTION'))

tests/data/parser/parseTransactionErr1.out

@@ -1 +1 @@
-a:4:{s:5:"query";s:7:"COMMIT;";s:5:"lexer";O:15:"SqlParser\Lexer":8:{s:6:"strict";b:0;s:3:"str";s:7:"COMMIT;";s:3:"len";i:7;s:4:"last";i:7;s:4:"list";O:20:"SqlParser\TokensList":3:{s:6:"tokens";a:3:{i:0;O:15:"SqlParser\Token":5:{s:5:"token";s:6:"COMMIT";s:5:"value";s:6:"COMMIT";s:4:"type";i:1;s:5:"flags";i:1;s:8:"position";i:0;}i:1;O:15:"SqlParser\Token":5:{s:5:"token";s:1:";";s:5:"value";s:1:";";s:4:"type";i:9;s:5:"flags";i:0;s:8:"position";i:6;}i:2;O:15:"SqlParser\Token":5:{s:5:"token";N;s:5:"value";N;s:4:"type";i:9;s:5:"flags";i:0;s:8:"position";N;}}s:5:"count";i:3;s:3:"idx";i:3;}s:9:"delimiter";s:1:";";s:12:"delimiterLen";i:1;s:6:"errors";a:0:{}}s:6:"parser";O:16:"SqlParser\Parser":4:{s:4:"list";r:8;s:6:"strict";b:0;s:6:"errors";a:0:{}s:10:"statements";a:0:{}}s:6:"errors";a:2:{s:5:"lexer";a:0:{}s:6:"parser";a:1:{i:0;a:3:{i:0;s:38:"No transaction was previously started.";i:1;r:10;i:2;i:0;}}}}
+a:4:{s:5:"query";s:7:"COMMIT;";s:5:"lexer";O:15:"SqlParser\Lexer":8:{s:6:"strict";b:0;s:3:"str";s:7:"COMMIT;";s:3:"len";i:7;s:4:"last";i:7;s:4:"list";O:20:"SqlParser\TokensList":3:{s:6:"tokens";a:3:{i:0;O:15:"SqlParser\Token":5:{s:5:"token";s:6:"COMMIT";s:5:"value";s:6:"COMMIT";s:4:"type";i:1;s:5:"flags";i:1;s:8:"position";i:0;}i:1;O:15:"SqlParser\Token":5:{s:5:"token";s:1:";";s:5:"value";s:1:";";s:4:"type";i:9;s:5:"flags";i:0;s:8:"position";i:6;}i:2;O:15:"SqlParser\Token":5:{s:5:"token";N;s:5:"value";N;s:4:"type";i:9;s:5:"flags";i:0;s:8:"position";N;}}s:5:"count";i:3;s:3:"idx";i:3;}s:9:"delimiter";s:1:";";s:12:"delimiterLen";i:1;s:6:"errors";a:0:{}}s:6:"parser";O:16:"SqlParser\Parser":4:{s:4:"list";r:8;s:6:"strict";b:0;s:6:"errors";a:0:{}s:10:"statements";a:1:{i:0;O:41:"SqlParser\Statements\TransactionStatement":6:{s:4:"type";i:2;s:10:"statements";N;s:3:"end";N;s:7:"options";O:33:"SqlParser\Components\OptionsArray":1:{s:7:"options";a:1:{i:1;s:6:"COMMIT";}}s:5:"first";i:0;s:4:"last";i:0;}}}s:6:"errors";a:2:{s:5:"lexer";a:0:{}s:6:"parser";a:1:{i:0;a:3:{i:0;s:38:"No transaction was previously started.";i:1;r:10;i:2;i:0;}}}}