Version:

/aggregate/convexhull

URL: http://GPUDB_IP_ADDRESS:GPUDB_PORT/aggregate/convexhull

Calculates and returns the convex hull for the values in a table specified by input parameter table_name.

Input Parameter Description

Name Type Description
table_name string Name of table on which the operation will be performed. Must be an existing table, in [schema_name.]table_name format, using standard name resolution rules.
x_column_name string Name of the column containing the x coordinates of the points for the operation being performed.
y_column_name string Name of the column containing the y coordinates of the points for the operation being performed.
options map of string to strings Optional parameters. The default value is an empty map ( {} ).

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 'aggregate_convex_hull_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 /aggregate/convexhull endpoint:

Name Type Description
x_vector array of doubles Array of x coordinates of the resulting convex set.
y_vector array of doubles Array of y coordinates of the resulting convex set.
count int Count of the number of points in the convex set.
is_valid boolean  
info map of string to strings Additional information.

Empty string in case of an error.