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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\sphinx;
use Yii;
use yii\base\Component;
use yii\base\InvalidCallException;
use yii\db\Expression;
use yii\db\QueryInterface;
use yii\db\QueryTrait;
/**
* Query represents a SELECT SQL statement.
*
* Query provides a set of methods to facilitate the specification of different clauses
* in a SELECT statement. These methods can be chained together.
*
* By calling [[createCommand()]], we can get a [[Command]] instance which can be further
* used to perform/execute the Sphinx query.
*
* For example,
*
* ~~~
* $query = new Query;
* $query->select('id, groupd_id')
* ->from('idx_item')
* ->limit(10);
* // build and execute the query
* $command = $query->createCommand();
* // $command->sql returns the actual SQL
* $rows = $command->queryAll();
* ~~~
*
* Since Sphinx does not store the original indexed text, the snippets for the rows in query result
* should be build separately via another query. You can simplify this workflow using [[snippetCallback]].
*
* Warning: even if you do not set any query limit, implicit LIMIT 0,20 is present by default!
*
* @property Connection $connection Sphinx connection instance.
*
* @author Paul Klimov <klimov.paul@gmail.com>
* @since 2.0
*/
class Query extends Component implements QueryInterface
{
use QueryTrait;
/**
* @var array the columns being selected. For example, `['id', 'group_id']`.
* This is used to construct the SELECT clause in a SQL statement. If not set, if means selecting all columns.
* @see select()
*/
public $select;
/**
* @var string additional option that should be appended to the 'SELECT' keyword.
*/
public $selectOption;
/**
* @var boolean whether to select distinct rows of data only. If this is set true,
* the SELECT clause would be changed to SELECT DISTINCT.
*/
public $distinct;
/**
* @var array the index(es) to be selected from. For example, `['idx_user', 'idx_user_delta']`.
* This is used to construct the FROM clause in a SQL statement.
* @see from()
*/
public $from;
/**
* @var string text, which should be searched in fulltext mode.
* This value will be composed into MATCH operator inside the WHERE clause.
*/
public $match;
/**
* @var array how to group the query results. For example, `['company', 'department']`.
* This is used to construct the GROUP BY clause in a SQL statement.
*/
public $groupBy;
/**
* @var string WITHIN GROUP ORDER BY clause. This is a Sphinx specific extension
* that lets you control how the best row within a group will to be selected.
* The possible value matches the [[orderBy]] one.
*/
public $within;
/**
* @var array per-query options in format: optionName => optionValue
* They will compose OPTION clause. This is a Sphinx specific extension
* that lets you control a number of per-query options.
*/
public $options;
/**
* @var array list of query parameter values indexed by parameter placeholders.
* For example, `[':name' => 'Dan', ':age' => 31]`.
*/
public $params;
/**
* @var callback PHP callback, which should be used to fetch source data for the snippets.
* Such callback will receive array of query result rows as an argument and must return the
* array of snippet source strings in the order, which match one of incoming rows.
* For example:
* ~~~
* $query = new Query;
* $query->from('idx_item')
* ->match('pencil')
* ->snippetCallback(function ($rows) {
* $result = [];
* foreach ($rows as $row) {
* $result[] = file_get_contents('/path/to/index/files/' . $row['id'] . '.txt');
* }
* return $result;
* })
* ->all();
* ~~~
*/
public $snippetCallback;
/**
* @var array query options for the call snippet.
*/
public $snippetOptions;
/**
* @var Connection the Sphinx connection used to generate the SQL statements.
*/
private $_connection;
/**
* @param Connection $connection Sphinx connection instance
* @return static the query object itself
*/
public function setConnection($connection)
{
$this->_connection = $connection;
return $this;
}
/**
* @return Connection Sphinx connection instance
*/
public function getConnection()
{
if ($this->_connection === null) {
$this->_connection = $this->defaultConnection();
}
return $this->_connection;
}
/**
* @return Connection default connection value.
*/
protected function defaultConnection()
{
return Yii::$app->getComponent('sphinx');
}
/**
* Creates a Sphinx command that can be used to execute this query.
* @param Connection $connection the Sphinx connection used to generate the SQL statement.
* If this parameter is not given, the `sphinx` application component will be used.
* @return Command the created Sphinx command instance.
*/
public function createCommand($connection = null)
{
$this->setConnection($connection);
$connection = $this->getConnection();
list ($sql, $params) = $connection->getQueryBuilder()->build($this);
return $connection->createCommand($sql, $params);
}
/**
* Executes the query and returns all results as an array.
* @param Connection $db the Sphinx connection used to generate the SQL statement.
* If this parameter is not given, the `sphinx` application component will be used.
* @return array the query results. If the query results in nothing, an empty array will be returned.
*/
public function all($db = null)
{
$rows = $this->createCommand($db)->queryAll();
$rows = $this->fillUpSnippets($rows);
if ($this->indexBy === null) {
return $rows;
}
$result = [];
foreach ($rows as $row) {
if (is_string($this->indexBy)) {
$key = $row[$this->indexBy];
} else {
$key = call_user_func($this->indexBy, $row);
}
$result[$key] = $row;
}
return $result;
}
/**
* Executes the query and returns a single row of result.
* @param Connection $db the Sphinx connection used to generate the SQL statement.
* If this parameter is not given, the `sphinx` application component will be used.
* @return array|boolean the first row (in terms of an array) of the query result. False is returned if the query
* results in nothing.
*/
public function one($db = null)
{
$row = $this->createCommand($db)->queryOne();
if ($row !== false) {
list ($row) = $this->fillUpSnippets([$row]);
}
return $row;
}
/**
* Returns the query result as a scalar value.
* The value returned will be the first column in the first row of the query results.
* @param Connection $db the Sphinx connection used to generate the SQL statement.
* If this parameter is not given, the `sphinx` application component will be used.
* @return string|boolean the value of the first column in the first row of the query result.
* False is returned if the query result is empty.
*/
public function scalar($db = null)
{
return $this->createCommand($db)->queryScalar();
}
/**
* Executes the query and returns the first column of the result.
* @param Connection $db the Sphinx connection used to generate the SQL statement.
* If this parameter is not given, the `sphinx` application component will be used.
* @return array the first column of the query result. An empty array is returned if the query results in nothing.
*/
public function column($db = null)
{
return $this->createCommand($db)->queryColumn();
}
/**
* Returns the number of records.
* @param string $q the COUNT expression. Defaults to '*'.
* Make sure you properly quote column names in the expression.
* @param Connection $db the Sphinx connection used to generate the SQL statement.
* If this parameter is not given, the `sphinx` application component will be used.
* @return integer number of records
*/
public function count($q = '*', $db = null)
{
$this->select = ["COUNT($q)"];
return $this->createCommand($db)->queryScalar();
}
/**
* Returns the sum of the specified column values.
* @param string $q the column name or expression.
* Make sure you properly quote column names in the expression.
* @param Connection $db the Sphinx connection used to generate the SQL statement.
* If this parameter is not given, the `sphinx` application component will be used.
* @return integer the sum of the specified column values
*/
public function sum($q, $db = null)
{
$this->select = ["SUM($q)"];
return $this->createCommand($db)->queryScalar();
}
/**
* Returns the average of the specified column values.
* @param string $q the column name or expression.
* Make sure you properly quote column names in the expression.
* @param Connection $db the Sphinx connection used to generate the SQL statement.
* If this parameter is not given, the `sphinx` application component will be used.
* @return integer the average of the specified column values.
*/
public function average($q, $db = null)
{
$this->select = ["AVG($q)"];
return $this->createCommand($db)->queryScalar();
}
/**
* Returns the minimum of the specified column values.
* @param string $q the column name or expression.
* Make sure you properly quote column names in the expression.
* @param Connection $db the Sphinx connection used to generate the SQL statement.
* If this parameter is not given, the `sphinx` application component will be used.
* @return integer the minimum of the specified column values.
*/
public function min($q, $db = null)
{
$this->select = ["MIN($q)"];
return $this->createCommand($db)->queryScalar();
}
/**
* Returns the maximum of the specified column values.
* @param string $q the column name or expression.
* Make sure you properly quote column names in the expression.
* @param Connection $db the Sphinx connection used to generate the SQL statement.
* If this parameter is not given, the `sphinx` application component will be used.
* @return integer the maximum of the specified column values.
*/
public function max($q, $db = null)
{
$this->select = ["MAX($q)"];
return $this->createCommand($db)->queryScalar();
}
/**
* Returns a value indicating whether the query result contains any row of data.
* @param Connection $db the Sphinx connection used to generate the SQL statement.
* If this parameter is not given, the `sphinx` application component will be used.
* @return boolean whether the query result contains any row of data.
*/
public function exists($db = null)
{
$this->select = [new Expression('1')];
return $this->scalar($db) !== false;
}
/**
* Sets the SELECT part of the query.
* @param string|array $columns the columns to be selected.
* Columns can be specified in either a string (e.g. "id, name") or an array (e.g. ['id', 'name']).
* The method will automatically quote the column names unless a column contains some parenthesis
* (which means the column contains a Sphinx expression).
* @param string $option additional option that should be appended to the 'SELECT' keyword.
* @return static the query object itself
*/
public function select($columns, $option = null)
{
if (!is_array($columns)) {
$columns = preg_split('/\s*,\s*/', trim($columns), -1, PREG_SPLIT_NO_EMPTY);
}
$this->select = $columns;
$this->selectOption = $option;
return $this;
}
/**
* Sets the value indicating whether to SELECT DISTINCT or not.
* @param bool $value whether to SELECT DISTINCT or not.
* @return static the query object itself
*/
public function distinct($value = true)
{
$this->distinct = $value;
return $this;
}
/**
* Sets the FROM part of the query.
* @param string|array $tables the table(s) to be selected from. This can be either a string (e.g. `'idx_user'`)
* or an array (e.g. `['idx_user', 'idx_user_delta']`) specifying one or several index names.
* The method will automatically quote the table names unless it contains some parenthesis
* (which means the table is given as a sub-query or Sphinx expression).
* @return static the query object itself
*/
public function from($tables)
{
if (!is_array($tables)) {
$tables = preg_split('/\s*,\s*/', trim($tables), -1, PREG_SPLIT_NO_EMPTY);
}
$this->from = $tables;
return $this;
}
/**
* Sets the fulltext query text. This text will be composed into
* MATCH operator inside the WHERE clause.
* @param string $query fulltext query text.
* @return static the query object itself
*/
public function match($query)
{
$this->match = $query;
return $this;
}
/**
* Sets the WHERE part of the query.
*
* The method requires a $condition parameter, and optionally a $params parameter
* specifying the values to be bound to the query.
*
* The $condition parameter should be either a string (e.g. 'id=1') or an array.
* If the latter, it must be in one of the following two formats:
*
* - hash format: `['column1' => value1, 'column2' => value2, ...]`
* - operator format: `[operator, operand1, operand2, ...]`
*
* A condition in hash format represents the following SQL expression in general:
* `column1=value1 AND column2=value2 AND ...`. In case when a value is an array,
* an `IN` expression will be generated. And if a value is null, `IS NULL` will be used
* in the generated expression. Below are some examples:
*
* - `['type' => 1, 'status' => 2]` generates `(type = 1) AND (status = 2)`.
* - `['id' => [1, 2, 3], 'status' => 2]` generates `(id IN (1, 2, 3)) AND (status = 2)`.
* - `['status' => null] generates `status IS NULL`.
*
* A condition in operator format generates the SQL expression according to the specified operator, which
* can be one of the followings:
*
* - `and`: the operands should be concatenated together using `AND`. For example,
* `['and', 'id=1', 'id=2']` will generate `id=1 AND id=2`. If an operand is an array,
* it will be converted into a string using the rules described here. For example,
* `['and', 'type=1', ['or', 'id=1', 'id=2']]` will generate `type=1 AND (id=1 OR id=2)`.
* The method will NOT do any quoting or escaping.
*
* - `or`: similar to the `and` operator except that the operands are concatenated using `OR`.
*
* - `between`: operand 1 should be the column name, and operand 2 and 3 should be the
* starting and ending values of the range that the column is in.
* For example, `['between', 'id', 1, 10]` will generate `id BETWEEN 1 AND 10`.
*
* - `not between`: similar to `between` except the `BETWEEN` is replaced with `NOT BETWEEN`
* in the generated condition.
*
* - `in`: operand 1 should be a column or DB expression, and operand 2 be an array representing
* the range of the values that the column or DB expression should be in. For example,
* `['in', 'id', [1, 2, 3]]` will generate `id IN (1, 2, 3)`.
* The method will properly quote the column name and escape values in the range.
*
* - `not in`: similar to the `in` operator except that `IN` is replaced with `NOT IN` in the generated condition.
*
* - `like`: operand 1 should be a column or DB expression, and operand 2 be a string or an array representing
* the values that the column or DB expression should be like.
* For example, `['like', 'name', '%tester%']` will generate `name LIKE '%tester%'`.
* When the value range is given as an array, multiple `LIKE` predicates will be generated and concatenated
* using `AND`. For example, `['like', 'name', ['%test%', '%sample%']]` will generate
* `name LIKE '%test%' AND name LIKE '%sample%'`.
* The method will properly quote the column name and escape values in the range.
*
* - `or like`: similar to the `like` operator except that `OR` is used to concatenate the `LIKE`
* predicates when operand 2 is an array.
*
* - `not like`: similar to the `like` operator except that `LIKE` is replaced with `NOT LIKE`
* in the generated condition.
*
* - `or not like`: similar to the `not like` operator except that `OR` is used to concatenate
* the `NOT LIKE` predicates.
*
* @param string|array $condition the conditions that should be put in the WHERE part.
* @param array $params the parameters (name => value) to be bound to the query.
* @return static the query object itself
* @see andWhere()
* @see orWhere()
*/
public function where($condition, $params = [])
{
$this->where = $condition;
$this->addParams($params);
return $this;
}
/**
* Adds an additional WHERE condition to the existing one.
* The new condition and the existing one will be joined using the 'AND' operator.
* @param string|array $condition the new WHERE condition. Please refer to [[where()]]
* on how to specify this parameter.
* @param array $params the parameters (name => value) to be bound to the query.
* @return static the query object itself
* @see where()
* @see orWhere()
*/
public function andWhere($condition, $params = [])
{
if ($this->where === null) {
$this->where = $condition;
} else {
$this->where = ['and', $this->where, $condition];
}
$this->addParams($params);
return $this;
}
/**
* Adds an additional WHERE condition to the existing one.
* The new condition and the existing one will be joined using the 'OR' operator.
* @param string|array $condition the new WHERE condition. Please refer to [[where()]]
* on how to specify this parameter.
* @param array $params the parameters (name => value) to be bound to the query.
* @return static the query object itself
* @see where()
* @see andWhere()
*/
public function orWhere($condition, $params = [])
{
if ($this->where === null) {
$this->where = $condition;
} else {
$this->where = ['or', $this->where, $condition];
}
$this->addParams($params);
return $this;
}
/**
* Sets the GROUP BY part of the query.
* @param string|array $columns the columns to be grouped by.
* Columns can be specified in either a string (e.g. "id, name") or an array (e.g. ['id', 'name']).
* The method will automatically quote the column names unless a column contains some parenthesis
* (which means the column contains a DB expression).
* @return static the query object itself
* @see addGroupBy()
*/
public function groupBy($columns)
{
if (!is_array($columns)) {
$columns = preg_split('/\s*,\s*/', trim($columns), -1, PREG_SPLIT_NO_EMPTY);
}
$this->groupBy = $columns;
return $this;
}
/**
* Adds additional group-by columns to the existing ones.
* @param string|array $columns additional columns to be grouped by.
* Columns can be specified in either a string (e.g. "id, name") or an array (e.g. ['id', 'name']).
* The method will automatically quote the column names unless a column contains some parenthesis
* (which means the column contains a DB expression).
* @return static the query object itself
* @see groupBy()
*/
public function addGroupBy($columns)
{
if (!is_array($columns)) {
$columns = preg_split('/\s*,\s*/', trim($columns), -1, PREG_SPLIT_NO_EMPTY);
}
if ($this->groupBy === null) {
$this->groupBy = $columns;
} else {
$this->groupBy = array_merge($this->groupBy, $columns);
}
return $this;
}
/**
* Sets the parameters to be bound to the query.
* @param array $params list of query parameter values indexed by parameter placeholders.
* For example, `[':name' => 'Dan', ':age' => 31]`.
* @return static the query object itself
* @see addParams()
*/
public function params($params)
{
$this->params = $params;
return $this;
}
/**
* Adds additional parameters to be bound to the query.
* @param array $params list of query parameter values indexed by parameter placeholders.
* For example, `[':name' => 'Dan', ':age' => 31]`.
* @return static the query object itself
* @see params()
*/
public function addParams($params)
{
if (!empty($params)) {
if ($this->params === null) {
$this->params = $params;
} else {
foreach ($params as $name => $value) {
if (is_integer($name)) {
$this->params[] = $value;
} else {
$this->params[$name] = $value;
}
}
}
}
return $this;
}
/**
* Sets the query options.
* @param array $options query options in format: optionName => optionValue
* @return static the query object itself
* @see addOptions()
*/
public function options($options)
{
$this->options = $options;
return $this;
}
/**
* Adds additional query options.
* @param array $options query options in format: optionName => optionValue
* @return static the query object itself
* @see options()
*/
public function addOptions($options)
{
if (is_array($this->options)) {
$this->options = array_merge($this->options, $options);
} else {
$this->options = $options;
}
return $this;
}
/**
* Sets the WITHIN GROUP ORDER BY part of the query.
* @param string|array $columns the columns (and the directions) to find best row within a group.
* Columns can be specified in either a string (e.g. "id ASC, name DESC") or an array
* (e.g. `['id' => Query::SORT_ASC, 'name' => Query::SORT_DESC]`).
* The method will automatically quote the column names unless a column contains some parenthesis
* (which means the column contains a DB expression).
* @return static the query object itself
* @see addWithin()
*/
public function within($columns)
{
$this->within = $this->normalizeOrderBy($columns);
return $this;
}
/**
* Adds additional WITHIN GROUP ORDER BY columns to the query.
* @param string|array $columns the columns (and the directions) to find best row within a group.
* Columns can be specified in either a string (e.g. "id ASC, name DESC") or an array
* (e.g. `['id' => Query::SORT_ASC, 'name' => Query::SORT_DESC]`).
* The method will automatically quote the column names unless a column contains some parenthesis
* (which means the column contains a DB expression).
* @return static the query object itself
* @see within()
*/
public function addWithin($columns)
{
$columns = $this->normalizeOrderBy($columns);
if ($this->within === null) {
$this->within = $columns;
} else {
$this->within = array_merge($this->within, $columns);
}
return $this;
}
/**
* Sets the PHP callback, which should be used to retrieve the source data
* for the snippets building.
* @param callback $callback PHP callback, which should be used to fetch source data for the snippets.
* @return static the query object itself
* @see snippetCallback
*/
public function snippetCallback($callback)
{
$this->snippetCallback = $callback;
return $this;
}
/**
* Sets the call snippets query options.
* @param array $options call snippet options in format: option_name => option_value
* @return static the query object itself
* @see snippetCallback
*/
public function snippetOptions($options)
{
$this->snippetOptions = $options;
return $this;
}
/**
* Fills the query result rows with the snippets built from source determined by
* [[snippetCallback]] result.
* @param array $rows raw query result rows.
* @return array query result rows with filled up snippets.
*/
protected function fillUpSnippets($rows)
{
if ($this->snippetCallback === null) {
return $rows;
}
$snippetSources = call_user_func($this->snippetCallback, $rows);
$snippets = $this->callSnippets($snippetSources);
$snippetKey = 0;
foreach ($rows as $key => $row) {
$rows[$key]['snippet'] = $snippets[$snippetKey];
$snippetKey++;
}
return $rows;
}
/**
* Builds a snippets from provided source data.
* @param array $source the source data to extract a snippet from.
* @throws InvalidCallException in case [[match]] is not specified.
* @return array snippets list.
*/
protected function callSnippets(array $source)
{
$connection = $this->getConnection();
$match = $this->match;
if ($match === null) {
throw new InvalidCallException('Unable to call snippets: "' . $this->className() . '::match" should be specified.');
}
return $connection->createCommand()
->callSnippets($this->from[0], $source, $match, $this->snippetOptions)
->queryColumn();
}
}