Notes about schema - 6.5

Talend Job Script Reference Guide

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Depending on the outgoing flow or flows, you need to define for this component at least a schema named UNIQUE or one named DUPLICATE, or both of them. When defining a schema for this component, make sure that the addSchema {} function contains exactly the same column definitions as those of the incoming schema.

For how to define a schema, see Defining a schema in a Job script.