public function dropIndex($tableName, $schemaName, $indexName)
    {
        return $this->dialect->dropIndex($tableName, $schemaName, $indexName);
    }
public function dropIndex($tableName, $schemaName, $indexName)
    {
        return $this->dialect->dropIndex($tableName, $schemaName, $indexName);
    }
public function dropIndex ( $ tableName , $ schemaName , $ indexName ) { return $ this -> dialect -> dropIndex ( $ tableName , $ schemaName , $ indexName ) ; }
Generates SQL to delete an index from a table

@param string $tableName
@param string $schemaName
@param string $indexName

@return string
Generates SQL to delete an index from a table