zhangyue-hashdata opened a new pull request, #724:
URL: https://github.com/apache/cloudberry/pull/724
+----------+ AttrFilter +------+ ScanKey +------------+
| HashJoin | ------------> | Hash | ---------> | SeqScan/AM |
+----------+ +------+ +------------+
If "gp_enable_runtime_filter_pushdown" is on, three steps will be run:
Step 1. In ExecInitHashJoin(), try to find the mapper between the var in
hashclauses and the var in SeqScan. If found we will save the mapper
in
AttrFilter and push them to Hash node;
Step 2. We will create the range/bloom filters in AttrFilter during building
hash table, and these filters will be converted to the list of
ScanKey
and pushed down to Seqscan when the building finishes;
Step 3. If AM support SCAN_SUPPORT_RUNTIME_FILTER, these ScanKeys will be
pushed
down to the AM module further, otherwise will be used to filter slot
in
Seqscan;
perf:
CPU E5-2680 v2 10 cores, memory 32GB, 3 segments
1. tpcds 10s off: 865s on: 716s 17%
2. tpcds 100s off: 4592s on: 3751s 18%
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Fixes #ISSUE_Number
### What does this PR do?
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### Type of Change
- [ ] Bug fix (non-breaking change)
- [ ] New feature (non-breaking change)
- [ ] Breaking change (fix or feature with breaking changes)
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**User-facing changes:**
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