planCacheListFilters

Definition

planCacheListFilters

Lists the index filters associated with query shapes for a collection.

Returns:	Document listing the index filters. See Output.

Syntax

The command has the following syntax:

db.runCommand(
   {
     planCacheListFilters: <collection>
   }
)

Command Fields

The command has the following fields:

Required Access

A user must have access that includes the planCacheIndexFilter action.

Output

The planCacheListFilters command returns the document with the following form:

{
   "filters" : [
      {
         "query" : <query>
         "sort" : <sort>,
         "projection" : <projection>,
         "collation" : <collation>,
         "indexes" : [
            <index1>,
            ...
         ]
      },
      ...
   ],
   "ok" : 1
}

planCacheListFilters.filters

The array of documents that contain the index filter information.

Each document contains the following fields:

planCacheListFilters.filters.query

The query predicate associated with this filter. Although the query shows the specific values used to create the index filter, the values in the predicate are insignificant; i.e. query predicates cover similar queries that differ only in the values.

For instance, a query predicate of { "type": "electronics", "status" : "A" } covers the following query predicates:

{ type: "food", status: "A" }
{ type: "utensil", status: "D" }

planCacheListFilters.filters.sort

The sort associated with this filter. Can be an empty document.

planCacheListFilters.filters.projection

The projection associated with this filter. Can be an empty document.

planCacheListFilters.filters.collation

The collation associated with this filter. Can be an empty document.

planCacheListFilters.filters.indexes

The array of indexes for the query shape.

The query shape is the combination of these fields:

• query

• sort

• projection

• collation

To choose the best query plan, the query optimizer evaluates the indexes and the collection scan.

planCacheListFilters.ok

The status of the command.