ScalarFunction¶
-
class
vertica_sdk.
ScalarFunction
¶ Interface for a user-defined scalar function. A scalar function produces a single value for each row of input data.
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destroy
¶ Perform per instance destruction.
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processBlock
¶ Invoke the scalar function on a batch of rows contained in arg_reader, a
vertica_sdk.BlockReader
object.Output is written to res_writer, a
vertica_sdk.BlockWriter
object.
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setup
¶ Perform per instance initialization.
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