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yii2/framework/db/QueryBuilder.php

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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\db;
use yii\base\InvalidArgumentException;
use yii\base\NotSupportedException;
use yii\db\conditions\ConditionInterface;
use yii\db\conditions\HashCondition;
use yii\helpers\StringHelper;
/**
* QueryBuilder builds a SELECT SQL statement based on the specification given as a [[Query]] object.
*
* SQL statements are created from [[Query]] objects using the [[build()]]-method.
*
* QueryBuilder is also used by [[Command]] to build SQL statements such as INSERT, UPDATE, DELETE, CREATE TABLE.
*
* For more details and usage information on QueryBuilder, see the [guide article on query builders](guide:db-query-builder).
*
* @property string[] $conditionClasses Map of condition aliases to condition classes. For example: ```php
* ['LIKE' => yii\db\condition\LikeCondition::class] ``` . This property is write-only.
* @property string[] $expressionBuilders Array of builders that should be merged with the pre-defined ones in
* [[expressionBuilders]] property. This property is write-only.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class QueryBuilder extends \yii\base\BaseObject
{
/**
* The prefix for automatically generated query binding parameters.
*/
const PARAM_PREFIX = ':qp';
/**
* @var Connection the database connection.
*/
public $db;
/**
* @var string the separator between different fragments of a SQL statement.
* Defaults to an empty space. This is mainly used by [[build()]] when generating a SQL statement.
*/
public $separator = ' ';
/**
* @var array the abstract column types mapped to physical column types.
* This is mainly used to support creating/modifying tables using DB-independent data type specifications.
* Child classes should override this property to declare supported type mappings.
*/
public $typeMap = [];
/**
* @var array map of query condition to builder methods.
* These methods are used by [[buildCondition]] to build SQL conditions from array syntax.
* @deprecated since 2.0.14. Is not used, will be dropped in 2.1.0.
*/
protected $conditionBuilders = [];
/**
* @var array map of condition aliases to condition classes. For example:
*
* ```php
* return [
* 'LIKE' => yii\db\condition\LikeCondition::class,
* ];
* ```
*
* This property is used by [[createConditionFromArray]] method.
* See default condition classes list in [[defaultConditionClasses()]] method.
*
* In case you want to add custom conditions support, use the [[setConditionClasses()]] method.
*
* @see setConditonClasses()
* @see defaultConditionClasses()
* @since 2.0.14
*/
protected $conditionClasses = [];
/**
* @var string[]|ExpressionBuilderInterface[] maps expression class to expression builder class.
* For example:
*
* ```php
* [
* yii\db\Expression::class => yii\db\ExpressionBuilder::class
* ]
* ```
* This property is mainly used by [[buildExpression()]] to build SQL expressions form expression objects.
* See default values in [[defaultExpressionBuilders()]] method.
*
*
* To override existing builders or add custom, use [[setExpressionBuilder()]] method. New items will be added
* to the end of this array.
*
* To find a builder, [[buildExpression()]] will check the expression class for its exact presence in this map.
* In case it is NOT present, the array will be iterated in reverse direction, checking whether the expression
* extends the class, defined in this map.
*
* @see setExpressionBuilders()
* @see defaultExpressionBuilders()
* @since 2.0.14
*/
protected $expressionBuilders = [];
/**
* Constructor.
* @param Connection $connection the database connection.
* @param array $config name-value pairs that will be used to initialize the object properties
*/
public function __construct($connection, $config = [])
{
$this->db = $connection;
parent::__construct($config);
}
/**
* {@inheritdoc}
*/
public function init()
{
parent::init();
$this->expressionBuilders = array_merge($this->defaultExpressionBuilders(), $this->expressionBuilders);
$this->conditionClasses = array_merge($this->defaultConditionClasses(), $this->conditionClasses);
}
/**
* Contains array of default condition classes. Extend this method, if you want to change
* default condition classes for the query builder. See [[conditionClasses]] docs for details.
*
* @return array
* @see conditionClasses
* @since 2.0.14
*/
protected function defaultConditionClasses()
{
return [
'NOT' => 'yii\db\conditions\NotCondition',
'AND' => 'yii\db\conditions\AndCondition',
'OR' => 'yii\db\conditions\OrCondition',
'BETWEEN' => 'yii\db\conditions\BetweenCondition',
'NOT BETWEEN' => 'yii\db\conditions\BetweenCondition',
'IN' => 'yii\db\conditions\InCondition',
'NOT IN' => 'yii\db\conditions\InCondition',
'LIKE' => 'yii\db\conditions\LikeCondition',
'NOT LIKE' => 'yii\db\conditions\LikeCondition',
'OR LIKE' => 'yii\db\conditions\LikeCondition',
'OR NOT LIKE' => 'yii\db\conditions\LikeCondition',
'EXISTS' => 'yii\db\conditions\ExistsCondition',
'NOT EXISTS' => 'yii\db\conditions\ExistsCondition',
];
}
/**
* Contains array of default expression builders. Extend this method and override it, if you want to change
* default expression builders for this query builder. See [[expressionBuilders]] docs for details.
*
* @return array
* @see $expressionBuilders
* @since 2.0.14
*/
protected function defaultExpressionBuilders()
{
return [
'yii\db\Query' => 'yii\db\QueryExpressionBuilder',
'yii\db\PdoValue' => 'yii\db\PdoValueBuilder',
'yii\db\Expression' => 'yii\db\ExpressionBuilder',
'yii\db\conditions\ConjunctionCondition' => 'yii\db\conditions\ConjunctionConditionBuilder',
'yii\db\conditions\NotCondition' => 'yii\db\conditions\NotConditionBuilder',
'yii\db\conditions\AndCondition' => 'yii\db\conditions\ConjunctionConditionBuilder',
'yii\db\conditions\OrCondition' => 'yii\db\conditions\ConjunctionConditionBuilder',
'yii\db\conditions\BetweenCondition' => 'yii\db\conditions\BetweenConditionBuilder',
'yii\db\conditions\InCondition' => 'yii\db\conditions\InConditionBuilder',
'yii\db\conditions\LikeCondition' => 'yii\db\conditions\LikeConditionBuilder',
'yii\db\conditions\ExistsCondition' => 'yii\db\conditions\ExistsConditionBuilder',
'yii\db\conditions\SimpleCondition' => 'yii\db\conditions\SimpleConditionBuilder',
'yii\db\conditions\HashCondition' => 'yii\db\conditions\HashConditionBuilder',
'yii\db\conditions\BetweenColumnsCondition' => 'yii\db\conditions\BetweenColumnsConditionBuilder',
];
}
/**
* Setter for [[expressionBuilders]] property.
*
* @param string[] $builders array of builders that should be merged with the pre-defined ones
* in [[expressionBuilders]] property.
* @since 2.0.14
* @see expressionBuilders
*/
public function setExpressionBuilders($builders)
{
$this->expressionBuilders = array_merge($this->expressionBuilders, $builders);
}
/**
* Setter for [[conditionClasses]] property.
*
* @param string[] $classes map of condition aliases to condition classes. For example:
*
* ```php
* ['LIKE' => yii\db\condition\LikeCondition::class]
* ```
*
* @since 2.0.14.2
* @see conditionClasses
*/
public function setConditionClasses($classes)
{
$this->conditionClasses = array_merge($this->conditionClasses, $classes);
}
/**
* Generates a SELECT SQL statement from a [[Query]] object.
*
* @param Query $query the [[Query]] object from which the SQL statement will be generated.
* @param array $params the parameters to be bound to the generated SQL statement. These parameters will
* be included in the result with the additional parameters generated during the query building process.
* @return array the generated SQL statement (the first array element) and the corresponding
* parameters to be bound to the SQL statement (the second array element). The parameters returned
* include those provided in `$params`.
*/
public function build($query, $params = [])
{
$query = $query->prepare($this);
$params = empty($params) ? $query->params : array_merge($params, $query->params);
$clauses = [
$this->buildSelect($query->select, $params, $query->distinct, $query->selectOption),
$this->buildFrom($query->from, $params),
$this->buildJoin($query->join, $params),
$this->buildWhere($query->where, $params),
$this->buildGroupBy($query->groupBy),
$this->buildHaving($query->having, $params),
];
$sql = implode($this->separator, array_filter($clauses));
$sql = $this->buildOrderByAndLimit($sql, $query->orderBy, $query->limit, $query->offset);
if (!empty($query->orderBy)) {
foreach ($query->orderBy as $expression) {
if ($expression instanceof ExpressionInterface) {
$this->buildExpression($expression, $params);
}
}
}
if (!empty($query->groupBy)) {
foreach ($query->groupBy as $expression) {
if ($expression instanceof ExpressionInterface) {
$this->buildExpression($expression, $params);
}
}
}
$union = $this->buildUnion($query->union, $params);
if ($union !== '') {
$sql = "($sql){$this->separator}$union";
}
return [$sql, $params];
}
/**
* Builds given $expression
*
* @param ExpressionInterface $expression the expression to be built
* @param array $params the parameters to be bound to the generated SQL statement. These parameters will
* be included in the result with the additional parameters generated during the expression building process.
* @return string the SQL statement that will not be neither quoted nor encoded before passing to DBMS
* @throws InvalidArgumentException when $expression building is not supported by this QueryBuilder.
* @see ExpressionBuilderInterface
* @see expressionBuilders
* @since 2.0.14
* @see ExpressionInterface
*/
public function buildExpression(ExpressionInterface $expression, &$params = [])
{
$builder = $this->getExpressionBuilder($expression);
return $builder->build($expression, $params);
}
/**
* Gets object of [[ExpressionBuilderInterface]] that is suitable for $expression.
* Uses [[expressionBuilders]] array to find a suitable builder class.
*
* @param ExpressionInterface $expression
* @return ExpressionBuilderInterface
* @throws InvalidArgumentException when $expression building is not supported by this QueryBuilder.
* @since 2.0.14
* @see expressionBuilders
*/
public function getExpressionBuilder(ExpressionInterface $expression)
{
$className = get_class($expression);
if (!isset($this->expressionBuilders[$className])) {
foreach (array_reverse($this->expressionBuilders) as $expressionClass => $builderClass) {
if (is_subclass_of($expression, $expressionClass)) {
$this->expressionBuilders[$className] = $builderClass;
break;
}
}
if (!isset($this->expressionBuilders[$className])) {
throw new InvalidArgumentException('Expression of class ' . $className . ' can not be built in ' . get_class($this));
}
}
if ($this->expressionBuilders[$className] === __CLASS__) {
return $this;
}
if (!is_object($this->expressionBuilders[$className])) {
$this->expressionBuilders[$className] = new $this->expressionBuilders[$className]($this);
}
return $this->expressionBuilders[$className];
}
/**
* Creates an INSERT SQL statement.
* For example,
* ```php
* $sql = $queryBuilder->insert('user', [
* 'name' => 'Sam',
* 'age' => 30,
* ], $params);
* ```
* The method will properly escape the table and column names.
*
* @param string $table the table that new rows will be inserted into.
* @param array|Query $columns the column data (name => value) to be inserted into the table or instance
* of [[yii\db\Query|Query]] to perform INSERT INTO ... SELECT SQL statement.
* Passing of [[yii\db\Query|Query]] is available since version 2.0.11.
* @param array $params the binding parameters that will be generated by this method.
* They should be bound to the DB command later.
* @return string the INSERT SQL
*/
public function insert($table, $columns, &$params)
{
list($names, $placeholders, $values, $params) = $this->prepareInsertValues($table, $columns, $params);
return 'INSERT INTO ' . $this->db->quoteTableName($table)
. (!empty($names) ? ' (' . implode(', ', $names) . ')' : '')
. (!empty($placeholders) ? ' VALUES (' . implode(', ', $placeholders) . ')' : $values);
}
/**
* Prepares a `VALUES` part for an `INSERT` SQL statement.
*
* @param string $table the table that new rows will be inserted into.
* @param array|Query $columns the column data (name => value) to be inserted into the table or instance
* of [[yii\db\Query|Query]] to perform INSERT INTO ... SELECT SQL statement.
* @param array $params the binding parameters that will be generated by this method.
* They should be bound to the DB command later.
* @return array array of column names, placeholders, values and params.
* @since 2.0.14
*/
protected function prepareInsertValues($table, $columns, $params = [])
{
$schema = $this->db->getSchema();
$tableSchema = $schema->getTableSchema($table);
$columnSchemas = $tableSchema !== null ? $tableSchema->columns : [];
$names = [];
$placeholders = [];
$values = ' DEFAULT VALUES';
if ($columns instanceof Query) {
list($names, $values, $params) = $this->prepareInsertSelectSubQuery($columns, $schema, $params);
} else {
foreach ($columns as $name => $value) {
$names[] = $schema->quoteColumnName($name);
$value = isset($columnSchemas[$name]) ? $columnSchemas[$name]->dbTypecast($value) : $value;
if ($value instanceof ExpressionInterface) {
$placeholders[] = $this->buildExpression($value, $params);
} elseif ($value instanceof \yii\db\Query) {
list($sql, $params) = $this->build($value, $params);
$placeholders[] = "($sql)";
} else {
$placeholders[] = $this->bindParam($value, $params);
}
}
}
return [$names, $placeholders, $values, $params];
}
/**
* Prepare select-subquery and field names for INSERT INTO ... SELECT SQL statement.
*
* @param Query $columns Object, which represents select query.
* @param \yii\db\Schema $schema Schema object to quote column name.
* @param array $params the parameters to be bound to the generated SQL statement. These parameters will
* be included in the result with the additional parameters generated during the query building process.
* @return array array of column names, values and params.
* @throws InvalidArgumentException if query's select does not contain named parameters only.
* @since 2.0.11
*/
protected function prepareInsertSelectSubQuery($columns, $schema, $params = [])
{
if (!is_array($columns->select) || empty($columns->select) || in_array('*', $columns->select)) {
throw new InvalidArgumentException('Expected select query object with enumerated (named) parameters');
}
list($values, $params) = $this->build($columns, $params);
$names = [];
$values = ' ' . $values;
foreach ($columns->select as $title => $field) {
if (is_string($title)) {
$names[] = $schema->quoteColumnName($title);
} elseif (preg_match('/^(.*?)(?i:\s+as\s+|\s+)([\w\-_\.]+)$/', $field, $matches)) {
$names[] = $schema->quoteColumnName($matches[2]);
} else {
$names[] = $schema->quoteColumnName($field);
}
}
return [$names, $values, $params];
}
/**
* Generates a batch INSERT SQL statement.
*
* For example,
*
* ```php
* $sql = $queryBuilder->batchInsert('user', ['name', 'age'], [
* ['Tom', 30],
* ['Jane', 20],
* ['Linda', 25],
* ]);
* ```
*
* Note that the values in each row must match the corresponding column names.
*
* The method will properly escape the column names, and quote the values to be inserted.
*
* @param string $table the table that new rows will be inserted into.
* @param array $columns the column names
* @param array|\Generator $rows the rows to be batch inserted into the table
* @param array $params the binding parameters. This parameter exists since 2.0.14
* @return string the batch INSERT SQL statement
*/
public function batchInsert($table, $columns, $rows, &$params = [])
{
if (empty($rows)) {
return '';
}
$schema = $this->db->getSchema();
if (($tableSchema = $schema->getTableSchema($table)) !== null) {
$columnSchemas = $tableSchema->columns;
} else {
$columnSchemas = [];
}
$values = [];
foreach ($rows as $row) {
$vs = [];
foreach ($row as $i => $value) {
if (isset($columns[$i], $columnSchemas[$columns[$i]])) {
$value = $columnSchemas[$columns[$i]]->dbTypecast($value);
}
if (is_string($value)) {
$value = $schema->quoteValue($value);
} elseif (is_float($value)) {
// ensure type cast always has . as decimal separator in all locales
$value = StringHelper::floatToString($value);
} elseif ($value === false) {
$value = 0;
} elseif ($value === null) {
$value = 'NULL';
} elseif ($value instanceof ExpressionInterface) {
$value = $this->buildExpression($value, $params);
}
$vs[] = $value;
}
$values[] = '(' . implode(', ', $vs) . ')';
}
if (empty($values)) {
return '';
}
foreach ($columns as $i => $name) {
$columns[$i] = $schema->quoteColumnName($name);
}
return 'INSERT INTO ' . $schema->quoteTableName($table)
. ' (' . implode(', ', $columns) . ') VALUES ' . implode(', ', $values);
}
/**
* Creates an SQL statement to insert rows into a database table if
* they do not already exist (matching unique constraints),
* or update them if they do.
*
* For example,
*
* ```php
* $sql = $queryBuilder->upsert('pages', [
* 'name' => 'Front page',
* 'url' => 'http://example.com/', // url is unique
* 'visits' => 0,
* ], [
* 'visits' => new \yii\db\Expression('visits + 1'),
* ], $params);
* ```
*
* The method will properly escape the table and column names.
*
* @param string $table the table that new rows will be inserted into/updated in.
* @param array|Query $insertColumns the column data (name => value) to be inserted into the table or instance
* of [[Query]] to perform `INSERT INTO ... SELECT` SQL statement.
* @param array|bool $updateColumns the column data (name => value) to be updated if they already exist.
* If `true` is passed, the column data will be updated to match the insert column data.
* If `false` is passed, no update will be performed if the column data already exists.
* @param array $params the binding parameters that will be generated by this method.
* They should be bound to the DB command later.
* @return string the resulting SQL.
* @throws NotSupportedException if this is not supported by the underlying DBMS.
* @since 2.0.14
*/
public function upsert($table, $insertColumns, $updateColumns, &$params)
{
throw new NotSupportedException($this->db->getDriverName() . ' does not support upsert statements.');
}
/**
* @param string $table
* @param array|Query $insertColumns
* @param array|bool $updateColumns
* @param Constraint[] $constraints this parameter recieves a matched constraint list.
* The constraints will be unique by their column names.
* @return array
* @since 2.0.14
*/
protected function prepareUpsertColumns($table, $insertColumns, $updateColumns, &$constraints = [])
{
if ($insertColumns instanceof Query) {
list($insertNames) = $this->prepareInsertSelectSubQuery($insertColumns, $this->db->getSchema());
} else {
$insertNames = array_map([$this->db, 'quoteColumnName'], array_keys($insertColumns));
}
$uniqueNames = $this->getTableUniqueColumnNames($table, $insertNames, $constraints);
$uniqueNames = array_map([$this->db, 'quoteColumnName'], $uniqueNames);
if ($updateColumns !== true) {
return [$uniqueNames, $insertNames, null];
}
return [$uniqueNames, $insertNames, array_diff($insertNames, $uniqueNames)];
}
/**
* Returns all column names belonging to constraints enforcing uniqueness (`PRIMARY KEY`, `UNIQUE INDEX`, etc.)
* for the named table removing constraints which did not cover the specified column list.
* The column list will be unique by column names.
*
* @param string $name table name. The table name may contain schema name if any. Do not quote the table name.
* @param string[] $columns source column list.
* @param Constraint[] $constraints this parameter optionally recieves a matched constraint list.
* The constraints will be unique by their column names.
* @return string[] column list.
*/
private function getTableUniqueColumnNames($name, $columns, &$constraints = [])
{
$schema = $this->db->getSchema();
if (!$schema instanceof ConstraintFinderInterface) {
return [];
}
$constraints = [];
$primaryKey = $schema->getTablePrimaryKey($name);
if ($primaryKey !== null) {
$constraints[] = $primaryKey;
}
foreach ($schema->getTableIndexes($name) as $constraint) {
if ($constraint->isUnique) {
$constraints[] = $constraint;
}
}
$constraints = array_merge($constraints, $schema->getTableUniques($name));
// Remove duplicates
$constraints = array_combine(array_map(function (Constraint $constraint) {
$columns = $constraint->columnNames;
sort($columns, SORT_STRING);
return json_encode($columns);
}, $constraints), $constraints);
$columnNames = [];
// Remove all constraints which do not cover the specified column list
$constraints = array_values(array_filter($constraints, function (Constraint $constraint) use ($schema, $columns, &$columnNames) {
$constraintColumnNames = array_map([$schema, 'quoteColumnName'], $constraint->columnNames);
$result = !array_diff($constraintColumnNames, $columns);
if ($result) {
$columnNames = array_merge($columnNames, $constraintColumnNames);
}
return $result;
}));
return array_unique($columnNames);
}
/**
* Creates an UPDATE SQL statement.
*
* For example,
*
* ```php
* $params = [];
* $sql = $queryBuilder->update('user', ['status' => 1], 'age > 30', $params);
* ```
*
* The method will properly escape the table and column names.
*
* @param string $table the table to be updated.
* @param array $columns the column data (name => value) to be updated.
* @param array|string $condition the condition that will be put in the WHERE part. Please
* refer to [[Query::where()]] on how to specify condition.
* @param array $params the binding parameters that will be modified by this method
* so that they can be bound to the DB command later.
* @return string the UPDATE SQL
*/
public function update($table, $columns, $condition, &$params)
{
list($lines, $params) = $this->prepareUpdateSets($table, $columns, $params);
$sql = 'UPDATE ' . $this->db->quoteTableName($table) . ' SET ' . implode(', ', $lines);
$where = $this->buildWhere($condition, $params);
return $where === '' ? $sql : $sql . ' ' . $where;
}
/**
* Prepares a `SET` parts for an `UPDATE` SQL statement.
* @param string $table the table to be updated.
* @param array $columns the column data (name => value) to be updated.
* @param array $params the binding parameters that will be modified by this method
* so that they can be bound to the DB command later.
* @return array an array `SET` parts for an `UPDATE` SQL statement (the first array element) and params (the second array element).
* @since 2.0.14
*/
protected function prepareUpdateSets($table, $columns, $params = [])
{
$tableSchema = $this->db->getTableSchema($table);
$columnSchemas = $tableSchema !== null ? $tableSchema->columns : [];
$sets = [];
foreach ($columns as $name => $value) {
$value = isset($columnSchemas[$name]) ? $columnSchemas[$name]->dbTypecast($value) : $value;
if ($value instanceof ExpressionInterface) {
$placeholder = $this->buildExpression($value, $params);
} else {
$placeholder = $this->bindParam($value, $params);
}
$sets[] = $this->db->quoteColumnName($name) . '=' . $placeholder;
}
return [$sets, $params];
}
/**
* Creates a DELETE SQL statement.
*
* For example,
*
* ```php
* $sql = $queryBuilder->delete('user', 'status = 0');
* ```
*
* The method will properly escape the table and column names.
*
* @param string $table the table where the data will be deleted from.
* @param array|string $condition the condition that will be put in the WHERE part. Please
* refer to [[Query::where()]] on how to specify condition.
* @param array $params the binding parameters that will be modified by this method
* so that they can be bound to the DB command later.
* @return string the DELETE SQL
*/
public function delete($table, $condition, &$params)
{
$sql = 'DELETE FROM ' . $this->db->quoteTableName($table);
$where = $this->buildWhere($condition, $params);
return $where === '' ? $sql : $sql . ' ' . $where;
}
/**
* Builds a SQL statement for creating a new DB table.
*
* The columns in the new table should be specified as name-definition pairs (e.g. 'name' => 'string'),
* where name stands for a column name which will be properly quoted by the method, and definition
* stands for the column type which can contain an abstract DB type.
* The [[getColumnType()]] method will be invoked to convert any abstract type into a physical one.
*
* If a column is specified with definition only (e.g. 'PRIMARY KEY (name, type)'), it will be directly
* inserted into the generated SQL.
*
* For example,
*
* ```php
* $sql = $queryBuilder->createTable('user', [
* 'id' => 'pk',
* 'name' => 'string',
* 'age' => 'integer',
* ]);
* ```
*
* @param string $table the name of the table to be created. The name will be properly quoted by the method.
* @param array $columns the columns (name => definition) in the new table.
* @param string $options additional SQL fragment that will be appended to the generated SQL.
* @return string the SQL statement for creating a new DB table.
*/
public function createTable($table, $columns, $options = null)
{
$cols = [];
foreach ($columns as $name => $type) {
if (is_string($name)) {
$cols[] = "\t" . $this->db->quoteColumnName($name) . ' ' . $this->getColumnType($type);
} else {
$cols[] = "\t" . $type;
}
}
$sql = 'CREATE TABLE ' . $this->db->quoteTableName($table) . " (\n" . implode(",\n", $cols) . "\n)";
return $options === null ? $sql : $sql . ' ' . $options;
}
/**
* Builds a SQL statement for renaming a DB table.
* @param string $oldName the table to be renamed. The name will be properly quoted by the method.
* @param string $newName the new table name. The name will be properly quoted by the method.
* @return string the SQL statement for renaming a DB table.
*/
public function renameTable($oldName, $newName)
{
return 'RENAME TABLE ' . $this->db->quoteTableName($oldName) . ' TO ' . $this->db->quoteTableName($newName);
}
/**
* Builds a SQL statement for dropping a DB table.
* @param string $table the table to be dropped. The name will be properly quoted by the method.
* @return string the SQL statement for dropping a DB table.
*/
public function dropTable($table)
{
return 'DROP TABLE ' . $this->db->quoteTableName($table);
}
/**
* Builds a SQL statement for adding a primary key constraint to an existing table.
* @param string $name the name of the primary key constraint.
* @param string $table the table that the primary key constraint will be added to.
* @param string|array $columns comma separated string or array of columns that the primary key will consist of.
* @return string the SQL statement for adding a primary key constraint to an existing table.
*/
public function addPrimaryKey($name, $table, $columns)
{
if (is_string($columns)) {
$columns = preg_split('/\s*,\s*/', $columns, -1, PREG_SPLIT_NO_EMPTY);
}
foreach ($columns as $i => $col) {
$columns[$i] = $this->db->quoteColumnName($col);
}
return 'ALTER TABLE ' . $this->db->quoteTableName($table) . ' ADD CONSTRAINT '
. $this->db->quoteColumnName($name) . ' PRIMARY KEY ('
. implode(', ', $columns) . ')';
}
/**
* Builds a SQL statement for removing a primary key constraint to an existing table.
* @param string $name the name of the primary key constraint to be removed.
* @param string $table the table that the primary key constraint will be removed from.
* @return string the SQL statement for removing a primary key constraint from an existing table.
*/
public function dropPrimaryKey($name, $table)
{
return 'ALTER TABLE ' . $this->db->quoteTableName($table)
. ' DROP CONSTRAINT ' . $this->db->quoteColumnName($name);
}
/**
* Builds a SQL statement for truncating a DB table.
* @param string $table the table to be truncated. The name will be properly quoted by the method.
* @return string the SQL statement for truncating a DB table.
*/
public function truncateTable($table)
{
return 'TRUNCATE TABLE ' . $this->db->quoteTableName($table);
}
/**
* Builds a SQL statement for adding a new DB column.
* @param string $table the table that the new column will be added to. The table name will be properly quoted by the method.
* @param string $column the name of the new column. The name will be properly quoted by the method.
* @param string $type the column type. The [[getColumnType()]] method will be invoked to convert abstract column type (if any)
* into the physical one. Anything that is not recognized as abstract type will be kept in the generated SQL.
* For example, 'string' will be turned into 'varchar(255)', while 'string not null' will become 'varchar(255) not null'.
* @return string the SQL statement for adding a new column.
*/
public function addColumn($table, $column, $type)
{
return 'ALTER TABLE ' . $this->db->quoteTableName($table)
. ' ADD ' . $this->db->quoteColumnName($column) . ' '
. $this->getColumnType($type);
}
/**
* Builds a SQL statement for dropping a DB column.
* @param string $table the table whose column is to be dropped. The name will be properly quoted by the method.
* @param string $column the name of the column to be dropped. The name will be properly quoted by the method.
* @return string the SQL statement for dropping a DB column.
*/
public function dropColumn($table, $column)
{
return 'ALTER TABLE ' . $this->db->quoteTableName($table)
. ' DROP COLUMN ' . $this->db->quoteColumnName($column);
}
/**
* Builds a SQL statement for renaming a column.
* @param string $table the table whose column is to be renamed. The name will be properly quoted by the method.
* @param string $oldName the old name of the column. The name will be properly quoted by the method.
* @param string $newName the new name of the column. The name will be properly quoted by the method.
* @return string the SQL statement for renaming a DB column.
*/
public function renameColumn($table, $oldName, $newName)
{
return 'ALTER TABLE ' . $this->db->quoteTableName($table)
. ' RENAME COLUMN ' . $this->db->quoteColumnName($oldName)
. ' TO ' . $this->db->quoteColumnName($newName);
}
/**
* Builds a SQL statement for changing the definition of a column.
* @param string $table the table whose column is to be changed. The table name will be properly quoted by the method.
* @param string $column the name of the column to be changed. The name will be properly quoted by the method.
* @param string $type the new column type. The [[getColumnType()]] method will be invoked to convert abstract
* column type (if any) into the physical one. Anything that is not recognized as abstract type will be kept
* in the generated SQL. For example, 'string' will be turned into 'varchar(255)', while 'string not null'
* will become 'varchar(255) not null'.
* @return string the SQL statement for changing the definition of a column.
*/
public function alterColumn($table, $column, $type)
{
return 'ALTER TABLE ' . $this->db->quoteTableName($table) . ' CHANGE '
. $this->db->quoteColumnName($column) . ' '
. $this->db->quoteColumnName($column) . ' '
. $this->getColumnType($type);
}
/**
* Builds a SQL statement for adding a foreign key constraint to an existing table.
* The method will properly quote the table and column names.
* @param string $name the name of the foreign key constraint.
* @param string $table the table that the foreign key constraint will be added to.
* @param string|array $columns the name of the column to that the constraint will be added on.
* If there are multiple columns, separate them with commas or use an array to represent them.
* @param string $refTable the table that the foreign key references to.
* @param string|array $refColumns the name of the column that the foreign key references to.
* If there are multiple columns, separate them with commas or use an array to represent them.
* @param string $delete the ON DELETE option. Most DBMS support these options: RESTRICT, CASCADE, NO ACTION, SET DEFAULT, SET NULL
* @param string $update the ON UPDATE option. Most DBMS support these options: RESTRICT, CASCADE, NO ACTION, SET DEFAULT, SET NULL
* @return string the SQL statement for adding a foreign key constraint to an existing table.
*/
public function addForeignKey($name, $table, $columns, $refTable, $refColumns, $delete = null, $update = null)
{
$sql = 'ALTER TABLE ' . $this->db->quoteTableName($table)
. ' ADD CONSTRAINT ' . $this->db->quoteColumnName($name)
. ' FOREIGN KEY (' . $this->buildColumns($columns) . ')'
. ' REFERENCES ' . $this->db->quoteTableName($refTable)
. ' (' . $this->buildColumns($refColumns) . ')';
if ($delete !== null) {
$sql .= ' ON DELETE ' . $delete;
}
if ($update !== null) {
$sql .= ' ON UPDATE ' . $update;
}
return $sql;
}
/**
* Builds a SQL statement for dropping a foreign key constraint.
* @param string $name the name of the foreign key constraint to be dropped. The name will be properly quoted by the method.
* @param string $table the table whose foreign is to be dropped. The name will be properly quoted by the method.
* @return string the SQL statement for dropping a foreign key constraint.
*/
public function dropForeignKey($name, $table)
{
return 'ALTER TABLE ' . $this->db->quoteTableName($table)
. ' DROP CONSTRAINT ' . $this->db->quoteColumnName($name);
}
/**
* Builds a SQL statement for creating a new index.
* @param string $name the name of the index. The name will be properly quoted by the method.
* @param string $table the table that the new index will be created for. The table name will be properly quoted by the method.
* @param string|array $columns the column(s) that should be included in the index. If there are multiple columns,
* separate them with commas or use an array to represent them. Each column name will be properly quoted
* by the method, unless a parenthesis is found in the name.
* @param bool $unique whether to add UNIQUE constraint on the created index.
* @return string the SQL statement for creating a new index.
*/
public function createIndex($name, $table, $columns, $unique = false)
{
return ($unique ? 'CREATE UNIQUE INDEX ' : 'CREATE INDEX ')
. $this->db->quoteTableName($name) . ' ON '
. $this->db->quoteTableName($table)
. ' (' . $this->buildColumns($columns) . ')';
}
/**
* Builds a SQL statement for dropping an index.
* @param string $name the name of the index to be dropped. The name will be properly quoted by the method.
* @param string $table the table whose index is to be dropped. The name will be properly quoted by the method.
* @return string the SQL statement for dropping an index.
*/
public function dropIndex($name, $table)
{
return 'DROP INDEX ' . $this->db->quoteTableName($name) . ' ON ' . $this->db->quoteTableName($table);
}
/**
* Creates a SQL command for adding an unique constraint to an existing table.
* @param string $name the name of the unique constraint.
* The name will be properly quoted by the method.
* @param string $table the table that the unique constraint will be added to.
* The name will be properly quoted by the method.
* @param string|array $columns the name of the column to that the constraint will be added on.
* If there are multiple columns, separate them with commas.
* The name will be properly quoted by the method.
* @return string the SQL statement for adding an unique constraint to an existing table.
* @since 2.0.13
*/
public function addUnique($name, $table, $columns)
{
if (is_string($columns)) {
$columns = preg_split('/\s*,\s*/', $columns, -1, PREG_SPLIT_NO_EMPTY);
}
foreach ($columns as $i => $col) {
$columns[$i] = $this->db->quoteColumnName($col);
}
return 'ALTER TABLE ' . $this->db->quoteTableName($table) . ' ADD CONSTRAINT '
. $this->db->quoteColumnName($name) . ' UNIQUE ('
. implode(', ', $columns) . ')';
}
/**
* Creates a SQL command for dropping an unique constraint.
* @param string $name the name of the unique constraint to be dropped.
* The name will be properly quoted by the method.
* @param string $table the table whose unique constraint is to be dropped.
* The name will be properly quoted by the method.
* @return string the SQL statement for dropping an unique constraint.
* @since 2.0.13
*/
public function dropUnique($name, $table)
{
return 'ALTER TABLE ' . $this->db->quoteTableName($table)
. ' DROP CONSTRAINT ' . $this->db->quoteColumnName($name);
}
/**
* Creates a SQL command for adding a check constraint to an existing table.
* @param string $name the name of the check constraint.
* The name will be properly quoted by the method.
* @param string $table the table that the check constraint will be added to.
* The name will be properly quoted by the method.
* @param string $expression the SQL of the `CHECK` constraint.
* @return string the SQL statement for adding a check constraint to an existing table.
* @since 2.0.13
*/
public function addCheck($name, $table, $expression)
{
return 'ALTER TABLE ' . $this->db->quoteTableName($table) . ' ADD CONSTRAINT '
. $this->db->quoteColumnName($name) . ' CHECK (' . $this->db->quoteSql($expression) . ')';
}
/**
* Creates a SQL command for dropping a check constraint.
* @param string $name the name of the check constraint to be dropped.
* The name will be properly quoted by the method.
* @param string $table the table whose check constraint is to be dropped.
* The name will be properly quoted by the method.
* @return string the SQL statement for dropping a check constraint.
* @since 2.0.13
*/
public function dropCheck($name, $table)
{
return 'ALTER TABLE ' . $this->db->quoteTableName($table)
. ' DROP CONSTRAINT ' . $this->db->quoteColumnName($name);
}
/**
* Creates a SQL command for adding a default value constraint to an existing table.
* @param string $name the name of the default value constraint.
* The name will be properly quoted by the method.
* @param string $table the table that the default value constraint will be added to.
* The name will be properly quoted by the method.
* @param string $column the name of the column to that the constraint will be added on.
* The name will be properly quoted by the method.
* @param mixed $value default value.
* @return string the SQL statement for adding a default value constraint to an existing table.
* @throws NotSupportedException if this is not supported by the underlying DBMS.
* @since 2.0.13
*/
public function addDefaultValue($name, $table, $column, $value)
{
throw new NotSupportedException($this->db->getDriverName() . ' does not support adding default value constraints.');
}
/**
* Creates a SQL command for dropping a default value constraint.
* @param string $name the name of the default value constraint to be dropped.
* The name will be properly quoted by the method.
* @param string $table the table whose default value constraint is to be dropped.
* The name will be properly quoted by the method.
* @return string the SQL statement for dropping a default value constraint.
* @throws NotSupportedException if this is not supported by the underlying DBMS.
* @since 2.0.13
*/
public function dropDefaultValue($name, $table)
{
throw new NotSupportedException($this->db->getDriverName() . ' does not support dropping default value constraints.');
}
/**
* Creates a SQL statement for resetting the sequence value of a table's primary key.
* The sequence will be reset such that the primary key of the next new row inserted
* will have the specified value or the maximum existing value +1.
* @param string $table the name of the table whose primary key sequence will be reset
* @param array|string $value the value for the primary key of the next new row inserted. If this is not set,
* the next new row's primary key will have the maximum existing value +1.
* @return string the SQL statement for resetting sequence
* @throws NotSupportedException if this is not supported by the underlying DBMS
*/
public function resetSequence($table, $value = null)
{
throw new NotSupportedException($this->db->getDriverName() . ' does not support resetting sequence.');
}
/**
* Execute a SQL statement for resetting the sequence value of a table's primary key.
* Reason for execute is that some databases (Oracle) need several queries to do so.
* The sequence is reset such that the primary key of the next new row inserted
* will have the specified value or the maximum existing value +1.
* @param string $table the name of the table whose primary key sequence is reset
* @param array|string $value the value for the primary key of the next new row inserted. If this is not set,
* the next new row's primary key will have the maximum existing value +1.
* @throws NotSupportedException if this is not supported by the underlying DBMS
* @since 2.0.16
*/
public function executeResetSequence($table, $value = null)
{
$this->db->createCommand()->resetSequence($table, $value)->execute();
}
/**
* Builds a SQL statement for enabling or disabling integrity check.
* @param bool $check whether to turn on or off the integrity check.
* @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema.
* @param string $table the table name. Defaults to empty string, meaning that no table will be changed.
* @return string the SQL statement for checking integrity
* @throws NotSupportedException if this is not supported by the underlying DBMS
*/
public function checkIntegrity($check = true, $schema = '', $table = '')
{
throw new NotSupportedException($this->db->getDriverName() . ' does not support enabling/disabling integrity check.');
}
/**
* Builds a SQL command for adding comment to column.
*
* @param string $table the table whose column is to be commented. The table name will be properly quoted by the method.
* @param string $column the name of the column to be commented. The column name will be properly quoted by the method.
* @param string $comment the text of the comment to be added. The comment will be properly quoted by the method.
* @return string the SQL statement for adding comment on column
* @since 2.0.8
*/
public function addCommentOnColumn($table, $column, $comment)
{
return 'COMMENT ON COLUMN ' . $this->db->quoteTableName($table) . '.' . $this->db->quoteColumnName($column) . ' IS ' . $this->db->quoteValue($comment);
}
/**
* Builds a SQL command for adding comment to table.
*
* @param string $table the table whose column is to be commented. The table name will be properly quoted by the method.
* @param string $comment the text of the comment to be added. The comment will be properly quoted by the method.
* @return string the SQL statement for adding comment on table
* @since 2.0.8
*/
public function addCommentOnTable($table, $comment)
{
return 'COMMENT ON TABLE ' . $this->db->quoteTableName($table) . ' IS ' . $this->db->quoteValue($comment);
}
/**
* Builds a SQL command for adding comment to column.
*
* @param string $table the table whose column is to be commented. The table name will be properly quoted by the method.
* @param string $column the name of the column to be commented. The column name will be properly quoted by the method.
* @return string the SQL statement for adding comment on column
* @since 2.0.8
*/
public function dropCommentFromColumn($table, $column)
{
return 'COMMENT ON COLUMN ' . $this->db->quoteTableName($table) . '.' . $this->db->quoteColumnName($column) . ' IS NULL';
}
/**
* Builds a SQL command for adding comment to table.
*
* @param string $table the table whose column is to be commented. The table name will be properly quoted by the method.
* @return string the SQL statement for adding comment on column
* @since 2.0.8
*/
public function dropCommentFromTable($table)
{
return 'COMMENT ON TABLE ' . $this->db->quoteTableName($table) . ' IS NULL';
}
/**
* Creates a SQL View.
*
* @param string $viewName the name of the view to be created.
* @param string|Query $subQuery the select statement which defines the view.
* This can be either a string or a [[Query]] object.
* @return string the `CREATE VIEW` SQL statement.
* @since 2.0.14
*/
public function createView($viewName, $subQuery)
{
if ($subQuery instanceof Query) {
list($rawQuery, $params) = $this->build($subQuery);
array_walk(
$params,
function (&$param) {
$param = $this->db->quoteValue($param);
}
);
$subQuery = strtr($rawQuery, $params);
}
return 'CREATE VIEW ' . $this->db->quoteTableName($viewName) . ' AS ' . $subQuery;
}
/**
* Drops a SQL View.
*
* @param string $viewName the name of the view to be dropped.
* @return string the `DROP VIEW` SQL statement.
* @since 2.0.14
*/
public function dropView($viewName)
{
return 'DROP VIEW ' . $this->db->quoteTableName($viewName);
}
/**
* Converts an abstract column type into a physical column type.
*
* The conversion is done using the type map specified in [[typeMap]].
* The following abstract column types are supported (using MySQL as an example to explain the corresponding
* physical types):
*
* - `pk`: an auto-incremental primary key type, will be converted into "int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY"
* - `bigpk`: an auto-incremental primary key type, will be converted into "bigint(20) NOT NULL AUTO_INCREMENT PRIMARY KEY"
* - `upk`: an unsigned auto-incremental primary key type, will be converted into "int(10) UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY"
* - `char`: char type, will be converted into "char(1)"
* - `string`: string type, will be converted into "varchar(255)"
* - `text`: a long string type, will be converted into "text"
* - `smallint`: a small integer type, will be converted into "smallint(6)"
* - `integer`: integer type, will be converted into "int(11)"
* - `bigint`: a big integer type, will be converted into "bigint(20)"
* - `boolean`: boolean type, will be converted into "tinyint(1)"
* - `float``: float number type, will be converted into "float"
* - `decimal`: decimal number type, will be converted into "decimal"
* - `datetime`: datetime type, will be converted into "datetime"
* - `timestamp`: timestamp type, will be converted into "timestamp"
* - `time`: time type, will be converted into "time"
* - `date`: date type, will be converted into "date"
* - `money`: money type, will be converted into "decimal(19,4)"
* - `binary`: binary data type, will be converted into "blob"
*
* If the abstract type contains two or more parts separated by spaces (e.g. "string NOT NULL"), then only
* the first part will be converted, and the rest of the parts will be appended to the converted result.
* For example, 'string NOT NULL' is converted to 'varchar(255) NOT NULL'.
*
* For some of the abstract types you can also specify a length or precision constraint
* by appending it in round brackets directly to the type.
* For example `string(32)` will be converted into "varchar(32)" on a MySQL database.
* If the underlying DBMS does not support these kind of constraints for a type it will
* be ignored.
*
* If a type cannot be found in [[typeMap]], it will be returned without any change.
* @param string|ColumnSchemaBuilder $type abstract column type
* @return string physical column type.
*/
public function getColumnType($type)
{
if ($type instanceof ColumnSchemaBuilder) {
$type = $type->__toString();
}
if (isset($this->typeMap[$type])) {
return $this->typeMap[$type];
} elseif (preg_match('/^(\w+)\((.+?)\)(.*)$/', $type, $matches)) {
if (isset($this->typeMap[$matches[1]])) {
return preg_replace('/\(.+\)/', '(' . $matches[2] . ')', $this->typeMap[$matches[1]]) . $matches[3];
}
} elseif (preg_match('/^(\w+)\s+/', $type, $matches)) {
if (isset($this->typeMap[$matches[1]])) {
return preg_replace('/^\w+/', $this->typeMap[$matches[1]], $type);
}
}
return $type;
}
/**
* @param array $columns
* @param array $params the binding parameters to be populated
* @param bool $distinct
* @param string $selectOption
* @return string the SELECT clause built from [[Query::$select]].
*/
public function buildSelect($columns, &$params, $distinct = false, $selectOption = null)
{
$select = $distinct ? 'SELECT DISTINCT' : 'SELECT';
if ($selectOption !== null) {
$select .= ' ' . $selectOption;
}
if (empty($columns)) {
return $select . ' *';
}
foreach ($columns as $i => $column) {
if ($column instanceof ExpressionInterface) {
if (is_int($i)) {
$columns[$i] = $this->buildExpression($column, $params);
} else {
$columns[$i] = $this->buildExpression($column, $params) . ' AS ' . $this->db->quoteColumnName($i);
}
} elseif ($column instanceof Query) {
list($sql, $params) = $this->build($column, $params);
$columns[$i] = "($sql) AS " . $this->db->quoteColumnName($i);
} elseif (is_string($i) && $i !== $column) {
if (strpos($column, '(') === false) {
$column = $this->db->quoteColumnName($column);
}
$columns[$i] = "$column AS " . $this->db->quoteColumnName($i);
} elseif (strpos($column, '(') === false) {
if (preg_match('/^(.*?)(?i:\s+as\s+|\s+)([\w\-_\.]+)$/', $column, $matches)) {
$columns[$i] = $this->db->quoteColumnName($matches[1]) . ' AS ' . $this->db->quoteColumnName($matches[2]);
} else {
$columns[$i] = $this->db->quoteColumnName($column);
}
}
}
return $select . ' ' . implode(', ', $columns);
}
/**
* @param array $tables
* @param array $params the binding parameters to be populated
* @return string the FROM clause built from [[Query::$from]].
*/
public function buildFrom($tables, &$params)
{
if (empty($tables)) {
return '';
}
$tables = $this->quoteTableNames($tables, $params);
return 'FROM ' . implode(', ', $tables);
}
/**
* @param array $joins
* @param array $params the binding parameters to be populated
* @return string the JOIN clause built from [[Query::$join]].
* @throws Exception if the $joins parameter is not in proper format
*/
public function buildJoin($joins, &$params)
{
if (empty($joins)) {
return '';
}
foreach ($joins as $i => $join) {
if (!is_array($join) || !isset($join[0], $join[1])) {
throw new Exception('A join clause must be specified as an array of join type, join table, and optionally join condition.');
}
// 0:join type, 1:join table, 2:on-condition (optional)
list($joinType, $table) = $join;
$tables = $this->quoteTableNames((array)$table, $params);
$table = reset($tables);
$joins[$i] = "$joinType $table";
if (isset($join[2])) {
$condition = $this->buildCondition($join[2], $params);
if ($condition !== '') {
$joins[$i] .= ' ON ' . $condition;
}
}
}
return implode($this->separator, $joins);
}
/**
* Quotes table names passed.
*
* @param array $tables
* @param array $params
* @return array
*/
private function quoteTableNames($tables, &$params)
{
foreach ($tables as $i => $table) {
if ($table instanceof Query) {
list($sql, $params) = $this->build($table, $params);
$tables[$i] = "($sql) " . $this->db->quoteTableName($i);
} elseif (is_string($i)) {
if (strpos($table, '(') === false) {
$table = $this->db->quoteTableName($table);
}
$tables[$i] = "$table " . $this->db->quoteTableName($i);
} elseif (strpos($table, '(') === false) {
if ($tableWithAlias = $this->extractAlias($table)) { // with alias
$tables[$i] = $this->db->quoteTableName($tableWithAlias[1]) . ' ' . $this->db->quoteTableName($tableWithAlias[2]);
} else {
$tables[$i] = $this->db->quoteTableName($table);
}
}
}
return $tables;
}
/**
* @param string|array $condition
* @param array $params the binding parameters to be populated
* @return string the WHERE clause built from [[Query::$where]].
*/
public function buildWhere($condition, &$params)
{
$where = $this->buildCondition($condition, $params);
return $where === '' ? '' : 'WHERE ' . $where;
}
/**
* @param array $columns
* @return string the GROUP BY clause
*/
public function buildGroupBy($columns)
{
if (empty($columns)) {
return '';
}
foreach ($columns as $i => $column) {
if ($column instanceof ExpressionInterface) {
$columns[$i] = $this->buildExpression($column);
} elseif (strpos($column, '(') === false) {
$columns[$i] = $this->db->quoteColumnName($column);
}
}
return 'GROUP BY ' . implode(', ', $columns);
}
/**
* @param string|array $condition
* @param array $params the binding parameters to be populated
* @return string the HAVING clause built from [[Query::$having]].
*/
public function buildHaving($condition, &$params)
{
$having = $this->buildCondition($condition, $params);
return $having === '' ? '' : 'HAVING ' . $having;
}
/**
* Builds the ORDER BY and LIMIT/OFFSET clauses and appends them to the given SQL.
* @param string $sql the existing SQL (without ORDER BY/LIMIT/OFFSET)
* @param array $orderBy the order by columns. See [[Query::orderBy]] for more details on how to specify this parameter.
* @param int $limit the limit number. See [[Query::limit]] for more details.
* @param int $offset the offset number. See [[Query::offset]] for more details.
* @return string the SQL completed with ORDER BY/LIMIT/OFFSET (if any)
*/
public function buildOrderByAndLimit($sql, $orderBy, $limit, $offset)
{
$orderBy = $this->buildOrderBy($orderBy);
if ($orderBy !== '') {
$sql .= $this->separator . $orderBy;
}
$limit = $this->buildLimit($limit, $offset);
if ($limit !== '') {
$sql .= $this->separator . $limit;
}
return $sql;
}
/**
* @param array $columns
* @return string the ORDER BY clause built from [[Query::$orderBy]].
*/
public function buildOrderBy($columns)
{
if (empty($columns)) {
return '';
}
$orders = [];
foreach ($columns as $name => $direction) {
if ($direction instanceof ExpressionInterface) {
$orders[] = $this->buildExpression($direction);
} else {
$orders[] = $this->db->quoteColumnName($name) . ($direction === SORT_DESC ? ' DESC' : '');
}
}
return 'ORDER BY ' . implode(', ', $orders);
}
/**
* @param int $limit
* @param int $offset
* @return string the LIMIT and OFFSET clauses
*/
public function buildLimit($limit, $offset)
{
$sql = '';
if ($this->hasLimit($limit)) {
$sql = 'LIMIT ' . $limit;
}
if ($this->hasOffset($offset)) {
$sql .= ' OFFSET ' . $offset;
}
return ltrim($sql);
}
/**
* Checks to see if the given limit is effective.
* @param mixed $limit the given limit
* @return bool whether the limit is effective
*/
protected function hasLimit($limit)
{
return ($limit instanceof ExpressionInterface) || ctype_digit((string)$limit);
}
/**
* Checks to see if the given offset is effective.
* @param mixed $offset the given offset
* @return bool whether the offset is effective
*/
protected function hasOffset($offset)
{
return ($offset instanceof ExpressionInterface) || ctype_digit((string)$offset) && (string)$offset !== '0';
}
/**
* @param array $unions
* @param array $params the binding parameters to be populated
* @return string the UNION clause built from [[Query::$union]].
*/
public function buildUnion($unions, &$params)
{
if (empty($unions)) {
return '';
}
$result = '';
foreach ($unions as $i => $union) {
$query = $union['query'];
if ($query instanceof Query) {
list($unions[$i]['query'], $params) = $this->build($query, $params);
}
$result .= 'UNION ' . ($union['all'] ? 'ALL ' : '') . '( ' . $unions[$i]['query'] . ' ) ';
}
return trim($result);
}
/**
* Processes columns and properly quotes them if necessary.
* It will join all columns into a string with comma as separators.
* @param string|array $columns the columns to be processed
* @return string the processing result
*/
public function buildColumns($columns)
{
if (!is_array($columns)) {
if (strpos($columns, '(') !== false) {
return $columns;
}
$rawColumns = $columns;
$columns = preg_split('/\s*,\s*/', $columns, -1, PREG_SPLIT_NO_EMPTY);
if ($columns === false) {
throw new InvalidArgumentException("$rawColumns is not valid columns.");
}
}
foreach ($columns as $i => $column) {
if ($column instanceof ExpressionInterface) {
$columns[$i] = $this->buildExpression($column);
} elseif (strpos($column, '(') === false) {
$columns[$i] = $this->db->quoteColumnName($column);
}
}
return implode(', ', $columns);
}
/**
* Parses the condition specification and generates the corresponding SQL expression.
* @param string|array|ExpressionInterface $condition the condition specification. Please refer to [[Query::where()]]
* on how to specify a condition.
* @param array $params the binding parameters to be populated
* @return string the generated SQL expression
*/
public function buildCondition($condition, &$params)
{
if (is_array($condition)) {
if (empty($condition)) {
return '';
}
$condition = $this->createConditionFromArray($condition);
}
if ($condition instanceof ExpressionInterface) {
return $this->buildExpression($condition, $params);
}
return (string)$condition;
}
/**
* Transforms $condition defined in array format (as described in [[Query::where()]]
* to instance of [[yii\db\condition\ConditionInterface|ConditionInterface]] according to
* [[conditionClasses]] map.
*
* @param string|array $condition
* @return ConditionInterface
* @see conditionClasses
* @since 2.0.14
*/
public function createConditionFromArray($condition)
{
if (isset($condition[0])) { // operator format: operator, operand 1, operand 2, ...
$operator = strtoupper(array_shift($condition));
if (isset($this->conditionClasses[$operator])) {
$className = $this->conditionClasses[$operator];
} else {
$className = 'yii\db\conditions\SimpleCondition';
}
/** @var ConditionInterface $className */
return $className::fromArrayDefinition($operator, $condition);
}
// hash format: 'column1' => 'value1', 'column2' => 'value2', ...
return new HashCondition($condition);
}
/**
* Creates a condition based on column-value pairs.
* @param array $condition the condition specification.
* @param array $params the binding parameters to be populated
* @return string the generated SQL expression
* @deprecated since 2.0.14. Use `buildCondition()` instead.
*/
public function buildHashCondition($condition, &$params)
{
return $this->buildCondition(new HashCondition($condition), $params);
}
/**
* Connects two or more SQL expressions with the `AND` or `OR` operator.
* @param string $operator the operator to use for connecting the given operands
* @param array $operands the SQL expressions to connect.
* @param array $params the binding parameters to be populated
* @return string the generated SQL expression
* @deprecated since 2.0.14. Use `buildCondition()` instead.
*/
public function buildAndCondition($operator, $operands, &$params)
{
array_unshift($operands, $operator);
return $this->buildCondition($operands, $params);
}
/**
* Inverts an SQL expressions with `NOT` operator.
* @param string $operator the operator to use for connecting the given operands
* @param array $operands the SQL expressions to connect.
* @param array $params the binding parameters to be populated
* @return string the generated SQL expression
* @throws InvalidArgumentException if wrong number of operands have been given.
* @deprecated since 2.0.14. Use `buildCondition()` instead.
*/
public function buildNotCondition($operator, $operands, &$params)
{
array_unshift($operands, $operator);
return $this->buildCondition($operands, $params);
}
/**
* Creates an SQL expressions with the `BETWEEN` operator.
* @param string $operator the operator to use (e.g. `BETWEEN` or `NOT BETWEEN`)
* @param array $operands the first operand is the column name. The second and third operands
* describe the interval that column value should be in.
* @param array $params the binding parameters to be populated
* @return string the generated SQL expression
* @throws InvalidArgumentException if wrong number of operands have been given.
* @deprecated since 2.0.14. Use `buildCondition()` instead.
*/
public function buildBetweenCondition($operator, $operands, &$params)
{
array_unshift($operands, $operator);
return $this->buildCondition($operands, $params);
}
/**
* Creates an SQL expressions with the `IN` operator.
* @param string $operator the operator to use (e.g. `IN` or `NOT IN`)
* @param array $operands the first operand is the column name. If it is an array
* a composite IN condition will be generated.
* The second operand is an array of values that column value should be among.
* If it is an empty array the generated expression will be a `false` value if
* operator is `IN` and empty if operator is `NOT IN`.
* @param array $params the binding parameters to be populated
* @return string the generated SQL expression
* @throws Exception if wrong number of operands have been given.
* @deprecated since 2.0.14. Use `buildCondition()` instead.
*/
public function buildInCondition($operator, $operands, &$params)
{
array_unshift($operands, $operator);
return $this->buildCondition($operands, $params);
}
/**
* Creates an SQL expressions with the `LIKE` operator.
* @param string $operator the operator to use (e.g. `LIKE`, `NOT LIKE`, `OR LIKE` or `OR NOT LIKE`)
* @param array $operands an array of two or three operands
*
* - The first operand is the column name.
* - The second operand is a single value or an array of values that column value
* should be compared with. If it is an empty array the generated expression will
* be a `false` value if operator is `LIKE` or `OR LIKE`, and empty if operator
* is `NOT LIKE` or `OR NOT LIKE`.
* - An optional third operand can also be provided to specify how to escape special characters
* in the value(s). The operand should be an array of mappings from the special characters to their
* escaped counterparts. If this operand is not provided, a default escape mapping will be used.
* You may use `false` or an empty array to indicate the values are already escaped and no escape
* should be applied. Note that when using an escape mapping (or the third operand is not provided),
* the values will be automatically enclosed within a pair of percentage characters.
* @param array $params the binding parameters to be populated
* @return string the generated SQL expression
* @throws InvalidArgumentException if wrong number of operands have been given.
* @deprecated since 2.0.14. Use `buildCondition()` instead.
*/
public function buildLikeCondition($operator, $operands, &$params)
{
array_unshift($operands, $operator);
return $this->buildCondition($operands, $params);
}
/**
* Creates an SQL expressions with the `EXISTS` operator.
* @param string $operator the operator to use (e.g. `EXISTS` or `NOT EXISTS`)
* @param array $operands contains only one element which is a [[Query]] object representing the sub-query.
* @param array $params the binding parameters to be populated
* @return string the generated SQL expression
* @throws InvalidArgumentException if the operand is not a [[Query]] object.
* @deprecated since 2.0.14. Use `buildCondition()` instead.
*/
public function buildExistsCondition($operator, $operands, &$params)
{
array_unshift($operands, $operator);
return $this->buildCondition($operands, $params);
}
/**
* Creates an SQL expressions like `"column" operator value`.
* @param string $operator the operator to use. Anything could be used e.g. `>`, `<=`, etc.
* @param array $operands contains two column names.
* @param array $params the binding parameters to be populated
* @return string the generated SQL expression
* @throws InvalidArgumentException if wrong number of operands have been given.
* @deprecated since 2.0.14. Use `buildCondition()` instead.
*/
public function buildSimpleCondition($operator, $operands, &$params)
{
array_unshift($operands, $operator);
return $this->buildCondition($operands, $params);
}
/**
* Creates a SELECT EXISTS() SQL statement.
* @param string $rawSql the subquery in a raw form to select from.
* @return string the SELECT EXISTS() SQL statement.
* @since 2.0.8
*/
public function selectExists($rawSql)
{
return 'SELECT EXISTS(' . $rawSql . ')';
}
/**
* Helper method to add $value to $params array using [[PARAM_PREFIX]].
*
* @param string|null $value
* @param array $params passed by reference
* @return string the placeholder name in $params array
*
* @since 2.0.14
*/
public function bindParam($value, &$params)
{
$phName = self::PARAM_PREFIX . count($params);
$params[$phName] = $value;
return $phName;
}
/**
* Extracts table alias if there is one or returns false
* @param $table
* @return bool|array
* @since 2.0.24
*/
protected function extractAlias($table)
{
if (preg_match('/^(.*?)(?i:\s+as|)\s+([^ ]+)$/', $table, $matches)) {
return $matches;
}
return false;
}
}