[8.x] Backport two PRs (#117246) (#117843) #117967
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* LOOKUP JOIN using field-caps for field mapping Removes the hard-coded hack for languages_lookup, and instead does a field-caps check for the real join index. * Update docs/changelog/117246.yaml * Some code review comments
…l bugs found (elastic#117843) Adds several more tests to lookup-join.csv-spec, and fixes the following bugs: * FieldCaps on right hand side should ignore fieldNames method and just use "*" because currently the fieldNames search cannot handle lookup fields with aliases (should be fixed in a followup PR). * Stop using the lookup index in the ComputeService (so we don’t get both indices data coming in from the left, and other weird behaviour). * Ignore failing SearchStats checks on fields from the right hand side in the logical planner (so it does not plan EVAL field = null for all right hand fields). This should be fixed properly with the correct updates to TransportSearchShardsAction (or rather to making multiple use of that for each branch of the execution model).
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When we back-ported the LOOKUP JOIN PRs to 8.x (see #117967), we found it necessary to disable all csv-spec tests since they create indices with mode:lookup, which is illegal in the cluster state of mixed clusters where other nodes do not understand the new index mode. We need to re-enable the tests, and make sure the tests are only disabled in mixed clusters with node versions too old to handle the new mode.
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When we back-ported the LOOKUP JOIN PRs to 8.x (see elastic#117967), we found it necessary to disable all csv-spec tests since they create indices with mode:lookup, which is illegal in the cluster state of mixed clusters where other nodes do not understand the new index mode. We need to re-enable the tests, and make sure the tests are only disabled in mixed clusters with node versions too old to handle the new mode.
craigtaverner
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Dec 12, 2024
When we back-ported the LOOKUP JOIN PRs to 8.x (see #117967), we found it necessary to disable all csv-spec tests since they create indices with mode:lookup, which is illegal in the cluster state of mixed clusters where other nodes do not understand the new index mode. We need to re-enable the tests, and make sure the tests are only disabled in mixed clusters with node versions too old to handle the new mode.
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Manual backport of two PRs: