@ -15,10 +15,31 @@ use yii\db\QueryInterface;
use yii\db\QueryTrait;
/**
* Class Query
* 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.
*
* Note: implicit LIMIT 0,20 is present by default.
* 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!
*
* @author Paul Klimov < klimov.paul @ gmail . com >
* @since 2.0
@ -43,7 +64,7 @@ class Query extends Component implements QueryInterface
*/
public $distinct;
/**
* @var array the index(es) to be selected from. For example, `['idx_user', 'idx_post ']`.
* @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()
*/
@ -149,8 +170,8 @@ class Query extends Component implements QueryInterface
/**
* Executes the query and returns all results as an array.
* @param Connection $db the database connection used to generate the SQL statement.
* If this parameter is not given, the `db ` application component will be used.
* @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)
@ -174,8 +195,8 @@ class Query extends Component implements QueryInterface
/**
* Executes the query and returns a single row of result.
* @param Connection $db the database connection used to generate the SQL statement.
* If this parameter is not given, the `db ` application component will be used.
* @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.
*/
@ -191,8 +212,8 @@ class Query extends Component implements QueryInterface
/**
* 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 database connection used to generate the SQL statement.
* If this parameter is not given, the `db ` application component will be used.
* @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.
*/
@ -203,8 +224,8 @@ class Query extends Component implements QueryInterface
/**
* Executes the query and returns the first column of the result.
* @param Connection $db the database connection used to generate the SQL statement.
* If this parameter is not given, the `db ` application component will be used.
* @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)
@ -216,8 +237,8 @@ class Query extends Component implements QueryInterface
* 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 database connection used to generate the SQL statement.
* If this parameter is not given, the `db ` application component will be used.
* @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)
@ -230,8 +251,8 @@ class Query extends Component implements QueryInterface
* 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 database connection used to generate the SQL statement.
* If this parameter is not given, the `db ` application component will be used.
* @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)
@ -244,8 +265,8 @@ class Query extends Component implements QueryInterface
* 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 database connection used to generate the SQL statement.
* If this parameter is not given, the `db ` application component will be used.
* @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)
@ -258,8 +279,8 @@ class Query extends Component implements QueryInterface
* 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 database connection used to generate the SQL statement.
* If this parameter is not given, the `db ` application component will be used.
* @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)
@ -272,8 +293,8 @@ class Query extends Component implements QueryInterface
* 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 database connection used to generate the SQL statement.
* If this parameter is not given, the `db ` application component will be used.
* @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)
@ -284,8 +305,8 @@ class Query extends Component implements QueryInterface
/**
* Returns a value indicating whether the query result contains any row of data.
* @param Connection $db the database connection used to generate the SQL statement.
* If this parameter is not given, the `db ` application component will be used.
* @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)
@ -298,11 +319,9 @@ class Query extends Component implements QueryInterface
* 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']).
* Columns can contain table prefixes (e.g. "tbl_user.id") and/or column aliases (e.g. "tbl_user.id AS user_id").
* The method will automatically quote the column names unless a column contains some parenthesis
* (which means the column contains a DB expression).
* @param string $option additional option that should be appended to the 'SELECT' keyword. For example,
* in MySQL, the option 'SQL_CALC_FOUND_ROWS' can be used.
* (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)
@ -328,11 +347,10 @@ class Query extends Component implements QueryInterface
/**
* 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. `'tbl_user'`)
* or an array (e.g. `['tbl_user', 'tbl_profile']`) specifying one or several table names.
* Table names can contain schema prefixes (e.g. `'public.tbl_user'`) and/or table aliases (e.g. `'tbl_user u'`).
* @param string|array $tables the table(s) to be selected from. This can be either a string (e.g. `'idx_user'`)
* or an array (e.g. `['idx_user', 'idx_user_delta']`) specifying one or several index names.
* The method will automatically quote the table names unless it contains some parenthesis
* (which means the table is given as a sub-query or DB expression).
* (which means the table is given as a sub-query or Sphinx expression).
* @return static the query object itself
*/
public function from($tables)
@ -618,8 +636,11 @@ class Query extends Component implements QueryInterface
}
/**
* @param callback $callback
* 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)
{
@ -628,8 +649,10 @@ class Query extends Component implements QueryInterface
}
/**
* @param array $options
* 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)
{
@ -661,7 +684,8 @@ class Query extends Component implements QueryInterface
/**
* Builds a snippets from provided source data.
* @param array $source the source data to extract a snippet from.
* @return array snippets list
* @throws InvalidCallException in case [[match]] is not specified.
* @return array snippets list.
*/
protected function callSnippets(array $source)
{