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Direktori : /home/bitrix/www/bitrix/modules/perfmon/lib/sql/ |
Current File : /home/bitrix/www/bitrix/modules/perfmon/lib/sql/index.php |
<?php namespace Bitrix\Perfmon\Sql; use Bitrix\Main\NotSupportedException; class Index extends BaseObject { public $unique = false; public $columns = array(); /** * @param string $name Index name. * @param boolean $unique Uniqueness flag. */ function __construct($name = '', $unique) { parent::__construct($name); $this->unique = (bool)$unique; } /** * Adds column to the index definition. * * @param string $name Column name. * * @return Index */ function addColumn($name) { $this->columns[] = trim($name); $this->setBody(implode(", ", $this->columns)); return $this; } /** * Creates index object from tokens. * <p> * If parameter $indexName is not passed then current position should point to the name of the index. * * @param Tokenizer $tokenizer Tokens collection. * @param boolean $unique Uniqueness flag. * @param string $indexName Optional name of the index. * * @return Index * @throws NotSupportedException */ public static function create(Tokenizer $tokenizer, $unique = false, $indexName = '') { if (!$indexName) { if ($tokenizer->getCurrentToken()->text !== '(') { $indexName = $tokenizer->getCurrentToken()->text; $tokenizer->nextToken(); $tokenizer->skipWhiteSpace(); } } if ($tokenizer->testUpperText('ON')) { $tokenizer->skipWhiteSpace(); /** @noinspection PhpUnusedLocalVariableInspection */ $tableName = $tokenizer->getCurrentToken()->text; $tokenizer->nextToken(); $tokenizer->skipWhiteSpace(); } $index = new self($indexName, $unique); if ($tokenizer->testText('(')) { $tokenizer->skipWhiteSpace(); $token = $tokenizer->getCurrentToken(); $level = $token->level; $column = ''; do { if ($token->text === ',') { $index->addColumn($column); $column = ''; } else { $column .= $token->text; } $token = $tokenizer->nextToken(); } while (!$tokenizer->endOfInput() && $token->level >= $level); if ($column) { $index->addColumn($column); } if (!$tokenizer->testText(')')) throw new NotSupportedException("')' expected. line:".$tokenizer->getCurrentToken()->line); } else { throw new NotSupportedException("'(' expected. line:".$tokenizer->getCurrentToken()->line); } return $index; } /** * Searches token collection for 'ON' keyword. * <p> * Advances current position on to next token skipping whitespace. * * @param Tokenizer $tokenizer Tokens collection. * * @return void * @throws NotSupportedException */ public static function searchTableName(Tokenizer $tokenizer) { $lineToken = $tokenizer->getCurrentToken(); while (!$tokenizer->endOfInput()) { if ($tokenizer->getCurrentToken()->upper === 'ON') { $tokenizer->nextToken(); $tokenizer->skipWhiteSpace(); return; } $tokenizer->nextToken(); } throw new NotSupportedException('Index: table name not found. line: '.$lineToken->line); } /** * Return DDL for index creation. * * @param string $dbType Database type (MYSQL, ORACLE or MSSQL). * * @return array|string */ public function getCreateDdl($dbType = '') { return "CREATE ".($this->unique? "UNIQUE ": "")."INDEX ".$this->name." ON ".$this->parent->name."(".$this->body.")"; } /** * Return DDL for index destruction. * * @param string $dbType Database type (MYSQL, ORACLE or MSSQL). * * @return array|string */ public function getDropDdl($dbType = '') { switch ($dbType) { case "MYSQL": return "DROP INDEX ".$this->name." ON ".$this->parent->name; case "MSSQL": return "DROP INDEX ".$this->name." ON ".$this->parent->name; case "ORACLE": return "DROP INDEX ".$this->name; default: return "// ".get_class($this).":getDropDdl for database type [".$dbType."] not implemented"; } } /** * Return DDL for index modification. * * @param BaseObject $target Target object. * @param string $dbType Database type (MYSQL, ORACLE or MSSQL). * * @return array|string */ public function getModifyDdl(BaseObject $target, $dbType = '') { return array( $this->getDropDdl($dbType), $target->getCreateDdl($dbType), ); } }