Contract - Aster Execution Engine

Teradata Aster® Developer Guide

Product
Aster Execution Engine
Release Number
7.00.02
Published
July 2017
Language
English (United States)
Last Update
2018-04-13
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Product Category
Software

A contract describes:

  • Input table schema: Data types of the columns of the input tables.
  • Arguments: Input parameters (names and data types).
  • Message schema: Data types of the fields within the message.
  • Output: Data types of the columns of the output table.

Your SQL-GR function provides a contract to the graph engine so that the graph engine knows what output to expect from your SQL-GR function. Contracts are discussed in more detail later in this chapter.