The search mode of each search request.
Constants
SEARCH_MODE_UNSPECIFIED
value: 0
Default value. In this case both product search and faceted search will
be performed. Both [SearchResponse.SearchResult] and
[SearchResponse.Facet] will be returned.
PRODUCT_SEARCH_ONLY
value: 1
Only product search will be performed. The faceted search will be
disabled.
Only [SearchResponse.SearchResult] will be returned. [SearchResponse.Facet] will not be returned, even if SearchRequest.facet_specs or SearchRequest.dynamic_facet_spec is set.
FACETED_SEARCH_ONLY
value: 2
Only faceted search will be performed. The product search will be
disabled.
When in this mode, one or both of [SearchRequest.facet_spec][] and SearchRequest.dynamic_facet_spec should be set. Otherwise, an INVALID_ARGUMENT error is returned. Only [SearchResponse.Facet] will be returned. [SearchResponse.SearchResult] will not be returned.