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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\pgsql;
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use yii\base\InvalidParamException;
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/**
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* QueryBuilder is the query builder for PostgreSQL databases.
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*
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* @author Gevik Babakhani <gevikb@gmail.com>
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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 => 'serial NOT NULL PRIMARY KEY',
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Schema::TYPE_BIGPK => 'bigserial NOT NULL PRIMARY KEY',
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Schema::TYPE_STRING => 'varchar(255)',
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Schema::TYPE_TEXT => 'text',
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Schema::TYPE_SMALLINT => 'smallint',
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Schema::TYPE_INTEGER => 'integer',
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Schema::TYPE_BIGINT => 'bigint',
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Schema::TYPE_FLOAT => 'double precision',
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Schema::TYPE_DOUBLE => 'double precision',
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Schema::TYPE_DECIMAL => 'numeric(10,0)',
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Schema::TYPE_DATETIME => 'timestamp(0)',
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Schema::TYPE_TIMESTAMP => 'timestamp(0)',
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Schema::TYPE_TIME => 'time(0)',
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Schema::TYPE_DATE => 'date',
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Schema::TYPE_BINARY => 'bytea',
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Schema::TYPE_BOOLEAN => 'boolean',
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Schema::TYPE_MONEY => 'numeric(19,4)',
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];
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/**
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* @var array map of query condition to builder methods.
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* These methods are used by [[buildCondition]] to build SQL conditions from array syntax.
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*/
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protected $conditionBuilders = [
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'NOT' => 'buildNotCondition',
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'AND' => 'buildAndCondition',
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'OR' => 'buildAndCondition',
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'BETWEEN' => 'buildBetweenCondition',
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'NOT BETWEEN' => 'buildBetweenCondition',
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'IN' => 'buildInCondition',
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'NOT IN' => 'buildInCondition',
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'LIKE' => 'buildLikeCondition',
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'ILIKE' => 'buildLikeCondition',
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'NOT LIKE' => 'buildLikeCondition',
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'NOT ILIKE' => 'buildLikeCondition',
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'OR LIKE' => 'buildLikeCondition',
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'OR ILIKE' => 'buildLikeCondition',
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'OR NOT LIKE' => 'buildLikeCondition',
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'OR NOT ILIKE' => 'buildLikeCondition',
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'EXISTS' => 'buildExistsCondition',
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'NOT EXISTS' => 'buildExistsCondition',
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];
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/**
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* Builds a SQL statement for dropping an index.
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* @param string $name the name of the index to be dropped. The name will be properly quoted by the method.
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* @param string $table the table whose index is to be dropped. The name will be properly quoted by the method.
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* @return string the SQL statement for dropping an index.
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*/
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public function dropIndex($name, $table)
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{
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return 'DROP INDEX ' . $this->db->quoteTableName($name);
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}
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/**
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* Builds a SQL statement for renaming a DB table.
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* @param string $oldName the table to be renamed. The name will be properly quoted by the method.
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* @param string $newName the new table name. The name will be properly quoted by the method.
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* @return string the SQL statement for renaming a DB table.
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*/
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public function renameTable($oldName, $newName)
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{
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return 'ALTER TABLE ' . $this->db->quoteTableName($oldName) . ' RENAME TO ' . $this->db->quoteTableName($newName);
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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 && $table->sequenceName !== null) {
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// c.f. http://www.postgresql.org/docs/8.1/static/functions-sequence.html
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$sequence = $this->db->quoteTableName($table->sequenceName);
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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 = "(SELECT COALESCE(MAX(\"{$key}\"),0) FROM {$tableName})+1";
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} else {
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$value = (int) $value;
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}
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return "SELECT SETVAL('$sequence',$value,false)";
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} elseif ($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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* Builds a SQL statement for enabling or disabling integrity check.
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* @param boolean $check whether to turn on or off the integrity check.
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* @param string $schema the schema of the tables.
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* @param string $table the table name.
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* @return string the SQL statement for checking integrity
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*/
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public function checkIntegrity($check = true, $schema = '', $table = '')
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{
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$enable = $check ? 'ENABLE' : 'DISABLE';
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$schema = $schema ? $schema : $this->db->getSchema()->defaultSchema;
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$tableNames = $table ? [$table] : $this->db->getSchema()->getTableNames($schema);
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$command = '';
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foreach ($tableNames as $tableName) {
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$tableName = '"' . $schema . '"."' . $tableName . '"';
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$command .= "ALTER TABLE $tableName $enable TRIGGER ALL; ";
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}
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// enable to have ability to alter several tables
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$this->db->getMasterPdo()->setAttribute(\PDO::ATTR_EMULATE_PREPARES, true);
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return $command;
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}
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/**
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* Builds a SQL statement for changing the definition of a column.
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* @param string $table the table whose column is to be changed. The table name will be properly quoted by the method.
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* @param string $column the name of the column to be changed. The name will be properly quoted by the method.
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* @param string $type the new column type. The [[getColumnType()]] method will be invoked to convert abstract
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* column type (if any) into the physical one. Anything that is not recognized as abstract type will be kept
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* in the generated SQL. For example, 'string' will be turned into 'varchar(255)', while 'string not null'
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* will become 'varchar(255) not null'. You can also use PostgreSQL-specific syntax such as `SET NOT NULL`.
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* @return string the SQL statement for changing the definition of a column.
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*/
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public function alterColumn($table, $column, $type)
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{
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// https://github.com/yiisoft/yii2/issues/4492
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// http://www.postgresql.org/docs/9.1/static/sql-altertable.html
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if (!preg_match('/^(DROP|SET|RESET)\s+/i', $type)) {
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$type = 'TYPE ' . $this->getColumnType($type);
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}
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return 'ALTER TABLE ' . $this->db->quoteTableName($table) . ' ALTER COLUMN '
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. $this->db->quoteColumnName($column) . ' ' . $type;
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}
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/**
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* @inheritdoc
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*/
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public function batchInsert($table, $columns, $rows)
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{
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$schema = $this->db->getSchema();
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if (($tableSchema = $schema->getTableSchema($table)) !== null) {
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$columnSchemas = $tableSchema->columns;
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} else {
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$columnSchemas = [];
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}
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$values = [];
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foreach ($rows as $row) {
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$vs = [];
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foreach ($row as $i => $value) {
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if (!is_array($value) && isset($columnSchemas[$columns[$i]])) {
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$value = $columnSchemas[$columns[$i]]->dbTypecast($value);
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}
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if (is_string($value)) {
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$value = $schema->quoteValue($value);
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} elseif ($value === true) {
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$value = 'TRUE';
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} elseif ($value === false) {
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$value = 'FALSE';
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} elseif ($value === null) {
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$value = 'NULL';
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}
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$vs[] = $value;
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}
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$values[] = '(' . implode(', ', $vs) . ')';
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}
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foreach ($columns as $i => $name) {
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$columns[$i] = $schema->quoteColumnName($name);
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}
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return 'INSERT INTO ' . $schema->quoteTableName($table)
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. ' (' . implode(', ', $columns) . ') VALUES ' . implode(', ', $values);
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}
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}
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