planCacheClearFilters¶

Definition定义¶

planCacheClearFilters¶

Removes index filters on a collection. Although index filters only exist for the duration of the server process and do not persist after shutdown, you can also clear existing index filters with the planCacheClearFilters command.

Specify the query shape to remove a specific index filter. Omit the query shape to clear all index filters on a collection.

The command has the following syntax:语法如下所示：

db.runCommand(
   {
      planCacheClearFilters: <collection>,
      query: <query pattern>,
      sort: <sort specification>,
      projection: <projection specification>,
      comment: <any>
   }
)

The planCacheClearFilters command has the following field:

Field字段	Type类型	Description描述
planCacheClearFilters	string	The name of the collection.
query	document	Optional.可选。The query predicate associated with the filter to remove. If omitted, clears all filters from the collection. The values in the query predicate are insignificant in determining the query shape, so the values used in the query need not match the values shown using planCacheListFilters.
sort	document	Optional.可选。The sort associated with the filter to remove, if any.
projection	document	Optional.可选。The projection associated with the filter to remove, if any.
comment	any	Optional.可选。A user-provided comment to attach to this command. Once set, this comment appears alongside records of this command in the following locations: mongod log messages, in the attr.command.cursor.comment field. Database profiler output, in the command.comment field. currentOp output, in the command.comment field. A comment can be any valid BSON type (string, integer, object, array, etc). New in version 4.4.版本4.4中的新功能。

Required Access¶

A user must have access that includes the planCacheIndexFilter action.

Examples示例¶

{
  "query" : { "status" : "A" },
  "sort" : { "ord_date" : -1 },
  "projection" : { },
  "indexes" : [ { "status" : 1, "cust_id" : 1 } ]
}

{
  "query" : { "status" : "A" },
  "sort" : { },
  "projection" : { },
  "indexes" : [ { "status" : 1, "cust_id" : 1 } ]
}

db.runCommand(
   {
      planCacheClearFilters: "orders",
      query: { "status" : "A" }
   }
)

db.runCommand(
   {
      planCacheClearFilters: "orders",
      query: { "status" : "P" }
   }
)

db.runCommand(
   {
      planCacheClearFilters: "orders"
   }
)