SphinxClient::setGroupDistinct()
(PECL sphinx >= 0.1.0)
Set attribute name for per-group distinct values count calculations
说明
public SphinxClient::setGroupDistinct(string $attribute): bool
Sets attribute name for per-group distinct values count calculations. Only available for grouping queries. For each group, all values of$attributewill be stored, then the amount of distinct values will be calculated and returned to the client. This feature is similar to COUNT(DISTINCT)clause in SQL.
参数
- $attribute
A string containing group-by attribute name.
返回值
成功时返回TRUE，或者在失败时返回FALSE。
参见
- SphinxClient::setSortMode
- SphinxClient::setGroupBy
- SphinxClient::resetGroupBy