Search parameters.
| JSON representation | 
|---|
{
  "filter": string,
  "canonicalFilter": string,
  "sortBy": string,
  "boostSpec": {
    object ( | 
            
| Fields | |
|---|---|
filter | 
              
                 
 Optional. The filter string to restrict search results. The syntax of the filter string is the same as   | 
            
canonicalFilter | 
              
                 
 Optional. The canonical filter string to restrict search results. The syntax of the canonical filter string is the same as   | 
            
sortBy | 
              
                 
 Optional. The sort string to specify the sorting of search results. The syntax of the sort string is the same as [SearchRequest.sort][].  | 
            
boostSpec | 
              
                 
 Optional. The boost spec to specify the boosting of search results. The syntax of the boost spec is the same as   |