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filter_by_area(table_name=None, view_name=”, x_column_name=None, x_vector=None, y_column_name=None, y_vector=None, options=)[source]

Calculates which objects from a table are within a named area of interest (NAI/polygon). The operation is synchronous, meaning that a response will not be returned until all the matching objects are fully available. The response payload provides the count of the resulting set. A new resultant set (view) which satisfies the input NAI restriction specification is created with the name input parameter view_name passed in as part of the input.

Parameters

table_name (str) –

Name of the table to filter, in [schema_name.]table_name format, using standard name resolution rules. This may be the name of a table or a view (when chaining queries).

view_name (str) –

If provided, then this will be the name of the view containing the results, in [schema_name.]view_name format, using standard name resolution rules and meeting table naming criteria. Must not be an already existing table or view. The default value is ‘’.

x_column_name (str) –

Name of the column containing the x values to be filtered.

x_vector (list of floats) –

List of x coordinates of the vertices of the polygon representing the area to be filtered. The user can provide a single element (which will be automatically promoted to a list internally) or a list.

y_column_name (str) –

Name of the column containing the y values to be filtered.

y_vector (list of floats) –

List of y coordinates of the vertices of the polygon representing the area to be filtered. The user can provide a single element (which will be automatically promoted to a list internally) or a list.

options (dict of str to str) –

Optional parameters. Allowed keys are:

  • create_temp_table – If true, a unique temporary table name will be generated in the sys_temp schema and used in place of input parameter view_name. This is always allowed even if the caller does not have permission to create tables. The generated name is returned in qualified_view_name. Allowed values are:

    • true

    • false

    The default value is ‘false’.

  • collection_name – [DEPRECATED–please specify the containing schema for the view as part of input parameter view_name and use GPUdb.create_schema() to create the schema if non-existent] Name of a schema for the newly created view. If the schema provided is non-existent, it will be automatically created.

The default value is an empty dict ( ).

Returns

A dict with the following entries–

count (long) –

The number of records passing the area filter.

info (dict of str to str) –

Additional information. Allowed keys are:

  • qualified_view_name – The fully qualified name of the view (i.e. including the schema).

The default value is an empty dict ( ).