Returns the lower bound for the first date range for all date faceting on this field

# SolrQuery::getFacetDateStart

(PECL solr >= 0.9.2)

SolrQuery::getFacetDateStart — Returns the lower bound for the first date range for all date faceting on this field

### 说明

public function SolrQuery::getFacetDateStart(string `$field_override` = ?): string

Returns the lower bound for the first date range for all date faceting on this field. Accepts an optional field override

### 参数

`field_override`

  The name of the field

### 返回值

Returns a string on success and `null` if not set

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