Java SDK Documentation
12.0.0
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Public Member Functions | |
final void | cancelUDX (ServerInterface srvInterface) |
void | destroy (ServerInterface srvInterface, SizedColumnTypes argTypes) |
void | destroy (ServerInterface srvInterface, SizedColumnTypes argTypes, SessionParamWriterMap udSessionParams) |
boolean | isCanceled () |
abstract void | processPartition (ServerInterface srvInterface, PartitionReader input_reader, PartitionWriter input_writer) throws UdfException, DestroyInvocation |
void | setup (ServerInterface srvInterface, SizedColumnTypes argTypes) |
Protected Member Functions | |
void | cancel (ServerInterface srvInterface) |
Interface for User-Defined Transform Function (UDTF). A UDTF operates on a table segment and returns zero or more rows of data.
UDTFs can only be used in the SELECT list of a query. UDTFs are cancelable.
A TransformFunction must have an associated TransformFunctionFactory.
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protectedinherited |
Cancel callback to be overridden by the UDX implementation. Called when the query running the UDX has been canceled.
srvInterface | a ServerInterface object used to communicate with Vertica |
Referenced by com.vertica.sdk.UDXObject.cancelUDX().
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inherited |
Cancel callback invoked when the query running the UDX has been canceled.
See cancel().
srvInterface | a ServerInterface object used to communicate with Vertica |
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inherited |
Perform per instance destruction. This function may throw errors
srvInterface | a ServerInterface object used to communicate with Vertica |
argTypes | the types of the arguments (as SizedColumnTypes) |
Referenced by com.vertica.sdk.UDXFunction.destroy().
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inherited |
Perform per instance destruction and write session parameters to be used by UDxs that are invoked after this one returns. This function may throw errors
srvInterface | a ServerInterface object used to communicate with Vertica |
argTypes | the types of the arguments (as SizedColumnTypes) |
udSessionParams | a SessionParamWriterMap |
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inherited |
Referenced by com.vertica.sdk.UDXObject.cancelUDX().
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pure virtual |
Invoke a user defined transform on a set of rows. As the name suggests, a batch of rows are passed in for every invocation to amortize performance.
srvInterface | a ServerInterface object used to communicate with Vertica |
input_reader | input rows |
input_writer | output location |
UdfException | UDF problem |
DestroyInvocation | vertica canceling – do not catch or handle |
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inherited |
Perform per instance initialization. This function may throw errors.
srvInterface | a ServerInterface object used to communicate with Vertica |
argTypes | the types of the arguments (as SizedColumnTypes) |