Some questions about limit push down
when I query hive table by sql, like this select * from hivetable where id = 1 limit 1, I found that the limit push down is invalid, is it a bug or was it designed like this?
if the sql is 'select * from hivetable limit 1' ,it is ok*来自志愿者整理的flink邮件归档
写回答
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Currently, the rule
PushLimitIntoTableSourceScanRulecaptures the structure that theFlinkLogicalSortnode is the parent of theFlinkLogicalTableSourceScan.In your case, we have a Calc node between the Sort node and the Scan node, which makes the rule fails to apply.
Maybe we can add a rule to transpose between the Sort and Calc.*来自志愿者整理的FLINK邮件归档
2021-12-02 16:00:19赞同 展开评论 打赏
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