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<?php
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/**
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* @link http://www.yiiframework.com/
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* @copyright Copyright (c) 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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namespace yii\db\cubrid;
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use yii\base\InvalidParamException;
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use yii\db\Exception;
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/**
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* QueryBuilder is the query builder for CUBRID databases (version 9.3.x and higher).
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*
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* @author Carsten Brandt <mail@cebe.cc>
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* @since 2.0
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*/
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class QueryBuilder extends \yii\db\QueryBuilder
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{
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/**
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* @var array mapping from abstract column types (keys) to physical column types (values).
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*/
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public $typeMap = [
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Schema::TYPE_PK => 'int NOT NULL AUTO_INCREMENT PRIMARY KEY',
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Schema::TYPE_BIGPK => 'bigint NOT NULL AUTO_INCREMENT PRIMARY KEY',
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Schema::TYPE_STRING => 'varchar(255)',
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Schema::TYPE_TEXT => 'varchar',
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Schema::TYPE_SMALLINT => 'smallint',
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Schema::TYPE_INTEGER => 'int',
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Schema::TYPE_BIGINT => 'bigint',
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Schema::TYPE_FLOAT => 'float(7)',
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Schema::TYPE_DOUBLE => 'double(15)',
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Schema::TYPE_DECIMAL => 'decimal(10,0)',
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Schema::TYPE_DATETIME => 'datetime',
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Schema::TYPE_TIMESTAMP => 'timestamp',
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Schema::TYPE_TIME => 'time',
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Schema::TYPE_DATE => 'date',
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Schema::TYPE_BINARY => 'blob',
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Schema::TYPE_BOOLEAN => 'smallint',
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Schema::TYPE_MONEY => 'decimal(19,4)',
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];
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/**
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* Creates a SQL statement for resetting the sequence value of a table's primary key.
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* The sequence will be reset such that the primary key of the next new row inserted
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* will have the specified value or 1.
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* @param string $tableName the name of the table whose primary key sequence will be reset
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* @param mixed $value the value for the primary key of the next new row inserted. If this is not set,
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* the next new row's primary key will have a value 1.
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* @return string the SQL statement for resetting sequence
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* @throws InvalidParamException if the table does not exist or there is no sequence associated with the table.
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*/
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public function resetSequence($tableName, $value = null)
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{
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$table = $this->db->getTableSchema($tableName);
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if ($table !== null && $table->sequenceName !== null) {
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$tableName = $this->db->quoteTableName($tableName);
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if ($value === null) {
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$key = reset($table->primaryKey);
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$value = (int) $this->db->createCommand("SELECT MAX(`$key`) FROM " . $this->db->schema->quoteTableName($tableName))->queryScalar() + 1;
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} else {
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$value = (int) $value;
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}
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return "ALTER TABLE " . $this->db->schema->quoteTableName($tableName) . " AUTO_INCREMENT=$value;";
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} elseif ($table === null) {
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throw new InvalidParamException("Table not found: $tableName");
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} else {
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throw new InvalidParamException("There is not sequence associated with table '$tableName'.");
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}
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}
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/**
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* @inheritdoc
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*/
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public function buildLimit($limit, $offset)
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{
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$sql = '';
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// limit is not optional in CUBRID
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// http://www.cubrid.org/manual/90/en/LIMIT%20Clause
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// "You can specify a very big integer for row_count to display to the last row, starting from a specific row."
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if ($this->hasLimit($limit)) {
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$sql = 'LIMIT ' . $limit;
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if ($this->hasOffset($offset)) {
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$sql .= ' OFFSET ' . $offset;
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}
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} elseif ($this->hasOffset($offset)) {
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$sql = "LIMIT 9223372036854775807 OFFSET $offset"; // 2^63-1
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}
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return $sql;
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}
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/**
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* Builds a SQL command for adding comment to column
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*
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* @param string $table the table whose column is to be commented. The table name will be properly quoted by the method.
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* @param string $column the name of the column to be commented. The column name will be properly quoted by the method.
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* @param string $comment the text of the comment to be added. The comment will be properly quoted by the method.
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* @return $this the command object itself
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*/
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public function addCommentOnColumn($table, $column, $comment)
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{
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$quotedTable = $this->db->quoteTableName($table);
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$definition = $this->getColumnDefinition($quotedTable, $column);
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$definition = trim(preg_replace("/COMMENT '(.*?)'/i", '', $definition));
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return sprintf(
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'ALTER TABLE %s CHANGE %s %s%s COMMENT %s',
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$quotedTable,
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$this->db->quoteColumnName($column),
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$this->db->quoteColumnName($column),
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empty($definition) ? '' : ' ' . $definition,
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$this->db->quoteValue($comment)
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);
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}
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/**
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* Builds a SQL command for adding comment to table
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*
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* @param string $table the table whose column is to be commented. The table name will be properly quoted by the method.
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* @param string $comment the text of the comment to be added. The comment will be properly quoted by the method.
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* @return $this the command object itself
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*/
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public function addCommentOnTable($table, $comment)
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{
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$quotedTable = $this->db->quoteTableName($table);
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return sprintf(
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'ALTER TABLE %s COMMENT %s',
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$quotedTable,
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$this->db->quoteValue($comment)
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);
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}
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/**
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* Builds a SQL command for adding comment to column
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*
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* @param string $table the table whose column is to be commented. The table name will be properly quoted by the method.
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* @param string $column the name of the column to be commented. The column name will be properly quoted by the method.
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* @return $this the command object itself
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*/
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public function dropCommentFromColumn($table, $column)
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{
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$quotedTable = $this->db->quoteTableName($table);
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$definition = $this->getColumnDefinition($quotedTable, $column);
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$definition = trim(preg_replace("/COMMENT '(.*?)'/i", '', $definition));
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return sprintf(
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'ALTER TABLE %s CHANGE %s %s%s COMMENT \'\'',
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$quotedTable,
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$this->db->quoteColumnName($column),
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$this->db->quoteColumnName($column),
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empty($definition) ? '' : ' ' . $definition
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);
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}
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/**
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* Builds a SQL command for adding comment to table
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*
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* @param string $table the table whose column is to be commented. The table name will be properly quoted by the method.
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* @return $this the command object itself
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*/
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public function dropCommentFromTable($table)
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{
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$quotedTable = $this->db->quoteTableName($table);
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return sprintf(
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"ALTER TABLE %s COMMENT ''",
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$quotedTable,
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empty($definition) ? '' : ' ' . $definition
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);
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}
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/**
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* Gets column definition.
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*
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* @param string $table table name
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* @param string $column column name
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* @return null|string the column definition
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* @throws Exception in case when table does not contain column
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*/
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private function getColumnDefinition($table, $column)
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{
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$row = $this->db->createCommand('SHOW CREATE TABLE ' . $table)->queryOne();
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if ($row === false) {
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throw new Exception("Unable to find column '$column' in table '$table'.");
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}
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if (isset($row['Create Table'])) {
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$sql = $row['Create Table'];
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} else {
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$row = array_values($row);
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$sql = $row[1];
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}
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if (preg_match_all('/^\s*`(.*?)`\s+(.*?),?$/m', $sql, $matches)) {
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foreach ($matches[1] as $i => $c) {
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if ($c === $column) {
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return $matches[2][$i];
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}
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}
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}
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return null;
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}
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}
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