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Timo Walther commented on FLINK-19038: -------------------------------------- [~nicholasjiang] yes, we can allow multiple consecutive fetches if it helps people. The current behavior has historical reasons because `limit()` without an order was introduced recently. The logic should try to first merge the fetch into the sort and produce an empty sort node with fetch otherwise. > It doesn't support to call Table.limit() continuously > ----------------------------------------------------- > > Key: FLINK-19038 > URL: https://issues.apache.org/jira/browse/FLINK-19038 > Project: Flink > Issue Type: Bug > Components: Table SQL / API > Affects Versions: 1.12.0 > Reporter: Dian Fu > Assignee: Nicholas Jiang > Priority: Major > Fix For: 1.12.0 > > > For example, table.limit(3).limit(2) will failed with "FETCH is already > defined." > {code} > org.apache.flink.table.api.ValidationException: FETCH is already defined. > at > org.apache.flink.table.operations.utils.SortOperationFactory.validateAndGetChildSort(SortOperationFactory.java:125) > at > org.apache.flink.table.operations.utils.SortOperationFactory.createLimitWithFetch(SortOperationFactory.java:105) > at > org.apache.flink.table.operations.utils.OperationTreeBuilder.limitWithFetch(OperationTreeBuilder.java:418) > {code} > However, as we support to call table.limit() without specifying the order, I > guess this should be a valid usage and should be allowed. -- This message was sent by Atlassian Jira (v8.3.4#803005)