From 37df692dce830d3d30bd60c8165c0c0a05703d38 Mon Sep 17 00:00:00 2001 From: Deven Bansod Date: Thu, 20 Dec 2018 17:37:56 +0530 Subject: [PATCH] Add support for PURGE statements Fix #207 Signed-off-by: Deven Bansod --- src/Parser.php | 2 + src/Statements/PurgeStatement.php | 143 +++++++++++++++++++++++++++ tests/Builder/PurgeStatementTest.php | 22 +++++ tests/Parser/PurgeStatementTest.php | 31 ++++++ tests/data/parser/parsePurge.in | 1 + tests/data/parser/parsePurge.out | 1 + tests/data/parser/parsePurge2.in | 1 + tests/data/parser/parsePurge2.out | 1 + tests/data/parser/parsePurge3.in | 1 + tests/data/parser/parsePurge3.out | 1 + tests/data/parser/parsePurge4.in | 1 + tests/data/parser/parsePurge4.out | 1 + tests/data/parser/parsePurgeErr.in | 1 + tests/data/parser/parsePurgeErr.out | 1 + tests/data/parser/parsePurgeErr2.in | 1 + tests/data/parser/parsePurgeErr2.out | 1 + tests/data/parser/parsePurgeErr3.in | 1 + tests/data/parser/parsePurgeErr3.out | 1 + 18 files changed, 212 insertions(+) create mode 100644 src/Statements/PurgeStatement.php create mode 100644 tests/Builder/PurgeStatementTest.php create mode 100644 tests/Parser/PurgeStatementTest.php create mode 100644 tests/data/parser/parsePurge.in create mode 100644 tests/data/parser/parsePurge.out create mode 100644 tests/data/parser/parsePurge2.in create mode 100644 tests/data/parser/parsePurge2.out create mode 100644 tests/data/parser/parsePurge3.in create mode 100644 tests/data/parser/parsePurge3.out create mode 100644 tests/data/parser/parsePurge4.in create mode 100644 tests/data/parser/parsePurge4.out create mode 100644 tests/data/parser/parsePurgeErr.in create mode 100644 tests/data/parser/parsePurgeErr.out create mode 100644 tests/data/parser/parsePurgeErr2.in create mode 100644 tests/data/parser/parsePurgeErr2.out create mode 100644 tests/data/parser/parsePurgeErr3.in create mode 100644 tests/data/parser/parsePurgeErr3.out diff --git a/src/Parser.php b/src/Parser.php index ab97855e3..ca756f51e 100644 --- a/src/Parser.php +++ b/src/Parser.php @@ -86,6 +86,8 @@ class Parser extends Core 'COMMIT' => 'PhpMyAdmin\\SqlParser\\Statements\\TransactionStatement', 'ROLLBACK' => 'PhpMyAdmin\\SqlParser\\Statements\\TransactionStatement', 'START TRANSACTION' => 'PhpMyAdmin\\SqlParser\\Statements\\TransactionStatement', + + 'PURGE' => 'PhpMyAdmin\\SqlParser\\Statements\\PurgeStatement', ); /** diff --git a/src/Statements/PurgeStatement.php b/src/Statements/PurgeStatement.php new file mode 100644 index 000000000..03748135c --- /dev/null +++ b/src/Statements/PurgeStatement.php @@ -0,0 +1,143 @@ +log_type . ' ' . 'LOGS ' + . ($this->end_option !== null ? ($this->end_option . ' ' . $this->end_expr) : ''); + return trim($ret); + } + + /** + * @param Parser $parser the instance that requests parsing + * @param TokensList $list the list of tokens to be parsed + */ + public function parse(Parser $parser, TokensList $list) + { + ++$list->idx; // Skipping `PURGE`. + + /** + * The state of the parser. + * + * @var int + */ + $state = 0; + + for (; $list->idx < $list->count; ++$list->idx) { + /** + * Token parsed at this moment. + * + * @var Token + */ + $token = $list->tokens[$list->idx]; + + // End of statement. + if ($token->type === Token::TYPE_DELIMITER) { + break; + } + + // Skipping whitespaces and comments. + if (($token->type === Token::TYPE_WHITESPACE) || ($token->type === Token::TYPE_COMMENT)) { + continue; + } + + switch ($state) { + case 0: + // parse `{ BINARY | MASTER }` + $this->log_type = self::parseExpectedKeyword($parser, $token, array('BINARY', 'MASTER')); + break; + case 1: + // parse `LOGS` + self::parseExpectedKeyword($parser, $token, array('LOGS')); + break; + case 2: + // parse `{ TO | BEFORE }` + $this->end_option = self::parseExpectedKeyword($parser, $token, array('TO', 'BEFORE')); + break; + case 3: + // parse `expr` + $this->end_expr = Expression::parse($parser, $list, array()); + break; + default: + $parser->error('Unexpected token.', $token); + break; + } + $state++; + $prevToken = $token; + } + + // Only one possible end state + if ($state != 4) { + $parser->error('Unexpected token.', $prevToken); + } + } + + /** + * Parse expected keyword (or throw relevant error) + * + * @param Parser $parser the instance that requests parsing + * @param Token $token token to be parsed + * @param Array $expected_keywords array of possibly expected keywords at this point + */ + private static function parseExpectedKeyword($parser, $token, $expected_keywords) + { + if ($token->type === Token::TYPE_KEYWORD) { + if (in_array($token->keyword, $expected_keywords)) { + return $token->keyword; + } else { + $parser->error('Unexpected keyword', $token); + } + } else { + $parser->error('Unexpected token.', $token); + } + return null; + } +} diff --git a/tests/Builder/PurgeStatementTest.php b/tests/Builder/PurgeStatementTest.php new file mode 100644 index 000000000..caa165239 --- /dev/null +++ b/tests/Builder/PurgeStatementTest.php @@ -0,0 +1,22 @@ +statements[0]; + $this->assertEquals($query, $stmt->build()); + + $query = 'PURGE BINARY LOGS BEFORE \'2008-04-02 22:46:26\''; + $parser = new Parser($query); + $stmt = $parser->statements[0]; + $this->assertEquals($query, $stmt->build()); + } +} diff --git a/tests/Parser/PurgeStatementTest.php b/tests/Parser/PurgeStatementTest.php new file mode 100644 index 000000000..dd67dc6df --- /dev/null +++ b/tests/Parser/PurgeStatementTest.php @@ -0,0 +1,31 @@ +runParserTest($test); + } + + public function testPurgeProvider() + { + return array( + array('parser/parsePurge'), + array('parser/parsePurge2'), + array('parser/parsePurge3'), + array('parser/parsePurge4'), + array('parser/parsePurgeErr'), + array('parser/parsePurgeErr2'), + array('parser/parsePurgeErr3'), + ); + } +} diff --git a/tests/data/parser/parsePurge.in b/tests/data/parser/parsePurge.in new file mode 100644 index 000000000..e13352298 --- /dev/null +++ b/tests/data/parser/parsePurge.in @@ -0,0 +1 @@ +PURGE BINARY LOGS TO 'mysql-bin.010'; \ No newline at end of file diff --git a/tests/data/parser/parsePurge.out b/tests/data/parser/parsePurge.out new file mode 100644 index 000000000..b21609c93 --- /dev/null +++ b/tests/data/parser/parsePurge.out @@ -0,0 +1 @@ +a:4:{s:5:"query";s:37:"PURGE BINARY LOGS TO 'mysql-bin.010';";s:5:"lexer";O:26:"PhpMyAdmin\SqlParser\Lexer":8:{s:3:"str";s:37:"PURGE BINARY LOGS TO 'mysql-bin.010';";s:3:"len";i:37;s:4:"last";i:37;s:4:"list";O:31:"PhpMyAdmin\SqlParser\TokensList":3:{s:6:"tokens";a:11:{i:0;O:26:"PhpMyAdmin\SqlParser\Token":6:{s:5:"token";s:5:"PURGE";s:5:"value";s:5:"PURGE";s:7:"keyword";s:5:"PURGE";s:4:"type";i:1;s:5:"flags";i:3;s:8:"position";i:0;}i:1;O:26:"PhpMyAdmin\SqlParser\Token":6:{s:5:"token";s:1:" ";s:5:"value";s:1:" ";s:7:"keyword";N;s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:5;}i:2;O:26:"PhpMyAdmin\SqlParser\Token":6:{s:5:"token";s:6:"BINARY";s:5:"value";s:6:"BINARY";s:7:"keyword";s:6:"BINARY";s:4:"type";i:1;s:5:"flags";i:43;s:8:"position";i:6;}i:3;O:26:"PhpMyAdmin\SqlParser\Token":6:{s:5:"token";s:1:" ";s:5:"value";s:1:" ";s:7:"keyword";N;s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:12;}i:4;O:26:"PhpMyAdmin\SqlParser\Token":6:{s:5:"token";s:4:"LOGS";s:5:"value";s:4:"LOGS";s:7:"keyword";s:4:"LOGS";s:4:"type";i:1;s:5:"flags";i:1;s:8:"position";i:13;}i:5;O:26:"PhpMyAdmin\SqlParser\Token":6:{s:5:"token";s:1:" ";s:5:"value";s:1:" ";s:7:"keyword";N;s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:17;}i:6;O:26:"PhpMyAdmin\SqlParser\Token":6:{s:5:"token";s:2:"TO";s:5:"value";s:2:"TO";s:7:"keyword";s:2:"TO";s:4:"type";i:1;s:5:"flags";i:3;s:8:"position";i:18;}i:7;O:26:"PhpMyAdmin\SqlParser\Token":6:{s:5:"token";s:1:" ";s:5:"value";s:1:" ";s:7:"keyword";N;s:4:"type";i:3;s:5:"flags";i:0;s:8:"position";i:20;}i:8;O:26:"PhpMyAdmin\SqlParser\Token":6:{s:5:"token";s:15:"'mysql-bin.010'";s:5:"value";s:13:"mysql-bin.010";s:7:"keyword";N;s:4:"type";i:7;s:5:"flags";i:1;s:8:"position";i:21;}i:9;O:26:"PhpMyAdmin\SqlParser\Token":6:{s:5:"token";s:1:";";s:5:"value";s:1:";";s:7:"keyword";N;s:4:"type";i:9;s:5:"flags";i:0;s:8:"position";i:36;}i:10;O:26:"PhpMyAdmin\SqlParser\Token":6:{s:5:"token";N;s:5:"value";N;s:7:"keyword";N;s:4:"type";i:9;s:5:"flags";i:0;s:8:"position";N;}}s:5:"count";i:11;s:3:"idx";i:11;}s:9:"delimiter";s:1:";";s:12:"delimiterLen";i:1;s:6:"strict";b:0;s:6:"errors";a:0:{}}s:6:"parser";O:27:"PhpMyAdmin\SqlParser\Parser":5:{s:4:"list";r:7;s:10:"statements";a:1:{i:0;O:46:"PhpMyAdmin\SqlParser\Statements\PurgeStatement":6:{s:8:"log_type";s:6:"BINARY";s:10:"end_option";s:2:"TO";s:8:"end_expr";O:42:"PhpMyAdmin\SqlParser\Components\Expression":7:{s:8:"database";N;s:5:"table";N;s:6:"column";s:13:"mysql-bin.010";s:4:"expr";s:15:"'mysql-bin.010'";s:5:"alias";N;s:8:"function";N;s:8:"subquery";N;}s:7:"options";N;s:5:"first";i:0;s:4:"last";i:9;}}s:8:"brackets";i:0;s:6:"strict";b:0;s:6:"errors";a:0:{}}s:6:"errors";a:2:{s:5:"lexer";a:0:{}s:6:"parser";a:0:{}}} \ No newline at end of file diff --git a/tests/data/parser/parsePurge2.in b/tests/data/parser/parsePurge2.in new file mode 100644 index 000000000..a09818a1a --- /dev/null +++ b/tests/data/parser/parsePurge2.in @@ -0,0 +1 @@ +PURGE BINARY LOGS BEFORE '2008-04-02 22:46:26'; 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