Filters data based on the specified expression. The results are stored in a result set with the given input parameter view_name.

For details see Expressions.

The response message contains the number of points for which the expression evaluated to be true, which is equivalent to the size of the result view.

Input Parameter Description

Name Type Description
table_name string Name of the table to filter. This may be the name of a collection, a table, or a view (when chaining queries). If filtering a collection, all child tables where the filter expression is valid will be filtered; the filtered result tables will then be placed in a collection specified by input parameter view_name.
view_name string If provided, then this will be the name of the view containing the results. Has the same naming restrictions as tables. The default value is ''.
expression string The select expression to filter the specified table. For details see Expressions.
options map of string to strings

Optional parameters. The default value is an empty map ( {} ).

Supported Parameters (keys) Parameter Description
collection_name Name of a collection which is to contain the newly created view. If the collection provided is non-existent, the collection will be automatically created. If empty, then the newly created view will be top-level.
view_id view this filtered-view is part of. The default value is ''.
ttl Sets the TTL of the view specified in input parameter view_name.

Output Parameter Description

The GPUdb server embeds the endpoint response inside a standard response structure which contains status information and the actual response to the query. Here is a description of the various fields of the wrapper:

Name Type Description
status String 'OK' or 'ERROR'
message String Empty if success or an error message
data_type String 'filter_request' or 'none' in case of an error
data String Empty string
data_str JSON or String

This embedded JSON represents the result of the /filter endpoint:

Name Type Description
count long The number of records that matched the given select expression.
info map of string to strings Additional information.

Empty string in case of an error.