[Bug][SQL] Fix bug that query failed when SQL contains Union and Colocate join #4842
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…cate Join. SQL like: `select a join b union select c join d`; if a b is colocate join, and c d is also colocate join, the query may failed with error like: `failed to get tablet. tablet_id=26846, with schema_hash=398972982, reason=tablet does not exist`
morningman
added
kind/fix
HappenLee
reviewed
Nov 4, 2020
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| private void computeColocateJoinInstanceParam(PlanFragmentId fragmentId, int parallelExecInstanceNum, FragmentExecParams params) { | ||
| Map<Integer, TNetworkAddress> bucketSeqToAddress = fragmentIdToSeqToAddressMap.get(fragmentId); |
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Maybe bucketSeqToScanRang should be a map like fragmentIdToSeqToAddressMap to solve this problem is a
better understanding way？
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I will leave it when refactoring them.
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Proposed changes
SQL like:
select a join b union select c join d;if both a/b and c/d are colocate join, the query may failed with error like:
failed to get tablet. tablet_id=26846, with schema_hash=398972982, reason=tablet does not existThis is because when assigning exec host for fragment, the planner failed to distinguish which scan nodes
belong to the certain fragment. So it may choose the wrong host for scan range.
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