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Enable Lexing of begin_label in the in-procedure statements
Ex. BEGIN.. END, LOOP, REPEAT, WHILE statements Fix #57 Fix phpmyadmin/phpmyadmin#12344 Fix phpmyadmin/phpmyadmin#12228 Signed-off-by: Deven Bansod <[email protected]>
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8 files changed

+164
-1
lines changed

8 files changed

+164
-1
lines changed

‎src/Context.php‎

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@@ -29,6 +29,16 @@ abstract class Context
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*/
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const KEYWORD_MAX_LENGTH = 30;
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/**
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* The maximum length of a label.
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*
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* @see static::$TOKEN_LABEL
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* Ref: https://dev.mysql.com/doc/refman/5.7/en/statement-labels.html
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*
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* @var int
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*/
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const LABEL_MAX_LENGTH = 16;
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/**
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* The maximum length of an operator.
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*

‎src/Lexer.php‎

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@@ -76,7 +76,7 @@ class Lexer
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'parseDelimiter', 'parseWhitespace', 'parseNumber',
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'parseComment', 'parseOperator', 'parseBool', 'parseString',
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'parseSymbol', 'parseKeyword', 'parseUnknown'
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'parseSymbol', 'parseKeyword', 'parseLabel', 'parseUnknown'
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);
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/**
@@ -441,6 +441,61 @@ public function parseKeyword()
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return $ret;
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}
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/**
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* Parses a label.
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*
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* @return Token
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*/
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public function parseLabel()
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{
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$token = '';
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/**
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* Value to be returned.
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*
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* @var Token $ret
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*/
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$ret = null;
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/**
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* The value of `$this->last` where `$token` ends in `$this->str`.
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*
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* @var int $iEnd
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*/
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$iEnd = $this->last;
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/**
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* Whether last parsed character is a whitespace.
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*
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* @var bool $lastSpace
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*/
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$lastSpace = false;
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for ($j = 1; $j < Context::LABEL_MAX_LENGTH && $this->last < $this->len; ++$j, ++$this->last) {
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// Composed keywords shouldn't have more than one whitespace between
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// keywords.
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if (Context::isWhitespace($this->str[$this->last])) {
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if ($lastSpace) {
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--$j; // The size of the keyword didn't increase.
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continue;
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} else {
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$lastSpace = true;
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}
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} elseif ($this->str[$this->last] === ':') {
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$token .= $this->str[$this->last];
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$ret = new Token($token, Token::TYPE_LABEL);
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$iEnd = $this->last;
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break;
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} else {
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$lastSpace = false;
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}
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$token .= $this->str[$this->last];
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}
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$this->last = $iEnd;
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return $ret;
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}
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/**
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* Parses an operator.
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*

‎src/Token.php‎

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Original file line numberDiff line numberDiff line change
@@ -119,6 +119,18 @@ class Token
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*/
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const TYPE_DELIMITER = 9;
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/**
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* Labels in LOOP statement, ITERATE statement etc.
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* For example (only for begin label):
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* begin_label: BEGIN [statement_list] END [end_label]
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* begin_label: LOOP [statement_list] END LOOP [end_label]
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* begin_label: REPEAT [statement_list] ... END REPEAT [end_label]
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* begin_label: WHILE ... DO [statement_list] END WHILE [end_label]
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*
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* @var int
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*/
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const TYPE_LABEL = 10;
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// Flags that describe the tokens in more detail.
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// All keywords must have flag 1 so `Context::isKeyword` method doesn't
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// require strict comparison.

‎tests/Lexer/LexerTest.php‎

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@@ -80,6 +80,8 @@ public function testLexProvider()
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array('lexer/lexSymbolErr3'),
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array('lexer/lexSymbolUser'),
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array('lexer/lexWhitespace'),
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array('lexer/lexLabel1'),
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array('lexer/lexLabel2'),
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);
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}
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}

‎tests/data/lexer/lexLabel1.in‎

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,11 @@
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CREATE PROCEDURE doiterate(p1 INT)
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BEGIN
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label1 : LOOP
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SET p1 = p1 + 1;
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IF p1 < 10 THEN
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ITERATE label1;
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END IF;
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LEAVE label1;
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END LOOP label1;
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SET @x = p1;
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END

‎tests/data/lexer/lexLabel1.out‎

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@@ -0,0 +1,31 @@
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a:4:{s:5:"query";s:187:"CREATE PROCEDURE doiterate(p1 INT)
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BEGIN
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label1 : LOOP
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SET p1 = p1 + 1;
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IF p1 < 10 THEN
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ITERATE label1;
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END IF;
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LEAVE label1;
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END LOOP label1;
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SET @x = p1;
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END";s:5:"lexer";O:15:"SqlParser\Lexer":8:{s:6:"strict";b:0;s:3:"str";s:187:"CREATE PROCEDURE doiterate(p1 INT)
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BEGIN
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label1 : LOOP
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SET p1 = p1 + 1;
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IF p1 < 10 THEN
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ITERATE label1;
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END IF;
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LEAVE label1;
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END LOOP label1;
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SET @x = p1;
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END";s:3:"len";i:187;s:4:"last";i:187;s:4:"list";O:20:"SqlParser\TokensList":3:{s:6:"tokens";a:73:{i:0;O:15:"SqlParser\Token":5:{s:5:"token";s:6:"CREATE";s:5:"value";s:6:"CREATE";s:4:"type";i:1;s:5:"flags";i:3;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:3;s:5:"flags";i:0;s:8:"position";i:6;}i:2;O:15:"SqlParser\Token":5:{s:5:"token";s:9:"PROCEDURE";s:5:"value";s:9:"PROCEDURE";s:4:"type";i:1;s:5:"flags";i:3;s:8:"position";i:7;}i:3;O:15:"SqlParser\Token":5:{s:5:"token";s:1:" ";s:5:"value";s:1:" ";s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:16;}i:4;O:15:"SqlParser\Token":5:{s:5:"token";s:9:"doiterate";s:5:"value";s:9:"doiterate";s:4:"type";i:0;s:5:"flags";i:0;s:8:"position";i:17;}i:5;O:15:"SqlParser\Token":5:{s:5:"token";s:1:"(";s:5:"value";s:1:"(";s:4:"type";i:2;s:5:"flags";i:16;s:8:"position";i:26;}i:6;O:15:"SqlParser\Token":5:{s:5:"token";s:2:"p1";s:5:"value";s:2:"p1";s:4:"type";i:0;s:5:"flags";i:0;s:8:"position";i:27;}i:7;O:15:"SqlParser\Token":5:{s:5:"token";s:1:" ";s:5:"value";s:1:" ";s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:29;}i:8;O:15:"SqlParser\Token":5:{s:5:"token";s:3:"INT";s:5:"value";s:3:"INT";s:4:"type";i:1;s:5:"flags";i:11;s:8:"position";i:30;}i:9;O:15:"SqlParser\Token":5:{s:5:"token";s:1:")";s:5:"value";s:1:")";s:4:"type";i:2;s:5:"flags";i:16;s:8:"position";i:33;}i:10;O:15:"SqlParser\Token":5:{s:5:"token";s:1:"
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";s:5:"value";s:1:" ";s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:34;}i:11;O:15:"SqlParser\Token":5:{s:5:"token";s:5:"BEGIN";s:5:"value";s:5:"BEGIN";s:4:"type";i:1;s:5:"flags";i:1;s:8:"position";i:35;}i:12;O:15:"SqlParser\Token":5:{s:5:"token";s:3:"
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";s:5:"value";s:1:" ";s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:40;}i:13;O:15:"SqlParser\Token":5:{s:5:"token";s:8:"label1 :";s:5:"value";s:8:"label1 :";s:4:"type";i:10;s:5:"flags";i:0;s:8:"position";i:43;}i:14;O:15:"SqlParser\Token":5:{s:5:"token";s:1:" ";s:5:"value";s:1:" ";s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:51;}i:15;O:15:"SqlParser\Token":5:{s:5:"token";s:4:"LOOP";s:5:"value";s:4:"LOOP";s:4:"type";i:1;s:5:"flags";i:3;s:8:"position";i:52;}i:16;O:15:"SqlParser\Token":5:{s:5:"token";s:5:"
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";s:5:"value";s:1:" ";s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:56;}i:17;O:15:"SqlParser\Token":5:{s:5:"token";s:3:"SET";s:5:"value";s:3:"SET";s:4:"type";i:1;s:5:"flags";i:11;s:8:"position";i:61;}i:18;O:15:"SqlParser\Token":5:{s:5:"token";s:1:" ";s:5:"value";s:1:" ";s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:64;}i:19;O:15:"SqlParser\Token":5:{s:5:"token";s:2:"p1";s:5:"value";s:2:"p1";s:4:"type";i:0;s:5:"flags";i:0;s:8:"position";i:65;}i:20;O:15:"SqlParser\Token":5:{s:5:"token";s:1:" ";s:5:"value";s:1:" ";s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:67;}i:21;O:15:"SqlParser\Token":5:{s:5:"token";s:1:"=";s:5:"value";s:1:"=";s:4:"type";i:2;s:5:"flags";i:2;s:8:"position";i:68;}i:22;O:15:"SqlParser\Token":5:{s:5:"token";s:1:" ";s:5:"value";s:1:" ";s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:69;}i:23;O:15:"SqlParser\Token":5:{s:5:"token";s:2:"p1";s:5:"value";s:2:"p1";s:4:"type";i:0;s:5:"flags";i:0;s:8:"position";i:70;}i:24;O:15:"SqlParser\Token":5:{s:5:"token";s:1:" ";s:5:"value";s:1:" ";s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:72;}i:25;O:15:"SqlParser\Token":5:{s:5:"token";s:1:"+";s:5:"value";s:1:"+";s:4:"type";i:2;s:5:"flags";i:1;s:8:"position";i:73;}i:26;O:15:"SqlParser\Token":5:{s:5:"token";s:1:" ";s:5:"value";s:1:" ";s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:74;}i:27;O:15:"SqlParser\Token":5:{s:5:"token";s:1:"1";s:5:"value";i:1;s:4:"type";i:6;s:5:"flags";i:0;s:8:"position";i:75;}i:28;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:76;}i:29;O:15:"SqlParser\Token":5:{s:5:"token";s:5:"
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";s:5:"value";s:1:" ";s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:77;}i:30;O:15:"SqlParser\Token":5:{s:5:"token";s:2:"IF";s:5:"value";s:2:"IF";s:4:"type";i:1;s:5:"flags";i:35;s:8:"position";i:82;}i:31;O:15:"SqlParser\Token":5:{s:5:"token";s:1:" ";s:5:"value";s:1:" ";s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:84;}i:32;O:15:"SqlParser\Token":5:{s:5:"token";s:2:"p1";s:5:"value";s:2:"p1";s:4:"type";i:0;s:5:"flags";i:0;s:8:"position";i:85;}i:33;O:15:"SqlParser\Token":5:{s:5:"token";s:1:" ";s:5:"value";s:1:" ";s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:87;}i:34;O:15:"SqlParser\Token":5:{s:5:"token";s:1:"<";s:5:"value";s:1:"<";s:4:"type";i:2;s:5:"flags";i:2;s:8:"position";i:88;}i:35;O:15:"SqlParser\Token":5:{s:5:"token";s:1:" ";s:5:"value";s:1:" ";s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:89;}i:36;O:15:"SqlParser\Token":5:{s:5:"token";s:2:"10";s:5:"value";i:10;s:4:"type";i:6;s:5:"flags";i:0;s:8:"position";i:90;}i:37;O:15:"SqlParser\Token":5:{s:5:"token";s:1:" ";s:5:"value";s:1:" ";s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:92;}i:38;O:15:"SqlParser\Token":5:{s:5:"token";s:4:"THEN";s:5:"value";s:4:"THEN";s:4:"type";i:1;s:5:"flags";i:3;s:8:"position";i:93;}i:39;O:15:"SqlParser\Token":5:{s:5:"token";s:7:"
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";s:5:"value";s:1:" ";s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:97;}i:40;O:15:"SqlParser\Token":5:{s:5:"token";s:7:"ITERATE";s:5:"value";s:7:"ITERATE";s:4:"type";i:1;s:5:"flags";i:3;s:8:"position";i:104;}i:41;O:15:"SqlParser\Token":5:{s:5:"token";s:1:" ";s:5:"value";s:1:" ";s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:111;}i:42;O:15:"SqlParser\Token":5:{s:5:"token";s:6:"label1";s:5:"value";s:6:"label1";s:4:"type";i:0;s:5:"flags";i:0;s:8:"position";i:112;}i:43;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:118;}i:44;O:15:"SqlParser\Token":5:{s:5:"token";s:5:"
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";s:5:"value";s:1:" ";s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:119;}i:45;O:15:"SqlParser\Token":5:{s:5:"token";s:3:"END";s:5:"value";s:3:"END";s:4:"type";i:1;s:5:"flags";i:1;s:8:"position";i:124;}i:46;O:15:"SqlParser\Token":5:{s:5:"token";s:1:" ";s:5:"value";s:1:" ";s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:127;}i:47;O:15:"SqlParser\Token":5:{s:5:"token";s:2:"IF";s:5:"value";s:2:"IF";s:4:"type";i:1;s:5:"flags";i:35;s:8:"position";i:128;}i:48;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:130;}i:49;O:15:"SqlParser\Token":5:{s:5:"token";s:5:"
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";s:5:"value";s:1:" ";s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:131;}i:50;O:15:"SqlParser\Token":5:{s:5:"token";s:5:"LEAVE";s:5:"value";s:5:"LEAVE";s:4:"type";i:1;s:5:"flags";i:3;s:8:"position";i:136;}i:51;O:15:"SqlParser\Token":5:{s:5:"token";s:1:" ";s:5:"value";s:1:" ";s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:141;}i:52;O:15:"SqlParser\Token":5:{s:5:"token";s:6:"label1";s:5:"value";s:6:"label1";s:4:"type";i:0;s:5:"flags";i:0;s:8:"position";i:142;}i:53;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:148;}i:54;O:15:"SqlParser\Token":5:{s:5:"token";s:3:"
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";s:5:"value";s:1:" ";s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:149;}i:55;O:15:"SqlParser\Token":5:{s:5:"token";s:3:"END";s:5:"value";s:3:"END";s:4:"type";i:1;s:5:"flags";i:1;s:8:"position";i:152;}i:56;O:15:"SqlParser\Token":5:{s:5:"token";s:1:" ";s:5:"value";s:1:" ";s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:155;}i:57;O:15:"SqlParser\Token":5:{s:5:"token";s:4:"LOOP";s:5:"value";s:4:"LOOP";s:4:"type";i:1;s:5:"flags";i:3;s:8:"position";i:156;}i:58;O:15:"SqlParser\Token":5:{s:5:"token";s:1:" ";s:5:"value";s:1:" ";s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:160;}i:59;O:15:"SqlParser\Token":5:{s:5:"token";s:6:"label1";s:5:"value";s:6:"label1";s:4:"type";i:0;s:5:"flags";i:0;s:8:"position";i:161;}i:60;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:167;}i:61;O:15:"SqlParser\Token":5:{s:5:"token";s:3:"
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‎tests/data/lexer/lexLabel2.in‎

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CREATE PROCEDURE doiterate(p1 INT)
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BEGIN
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label1: LOOP
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SET p1 = p1 + 1;
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IF p1 < 10 THEN
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ITERATE label1;
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END IF;
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LEAVE label1;
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END LOOP label1;
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SET @x = p1;
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END

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