[SYSTEMDS-3088] No prefetch for List type consumers #1840
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This patch fixes a bug in prefetch placement and prevent prefetch if the consumer is of List type. List is not an operation. A prefetch can wrongly pull a Spark intermediate if the output goes into a List. e.g. rightindex -> List
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This patch fixes a bug in prefetch placement and prevent prefetch if the consumer is of List type. List is not an operation. A prefetch can wrongly pull a Spark intermediate if the output goes into a List.
e.g. rightindex -> List