gongxun0928 opened a new pull request, #1324:
URL: https://github.com/apache/cloudberry/pull/1324
when seq scan begins, check whether the scanflags of table am is set to
determine whether the runtime filter is pushed down.
When the runtime filter is pushed down to pax am, pax am converts the
min/max scankey in the runtime filter into PFTNode and performs min/max
filtering.
```
CREATE TABLE t1(c1 int, c2 int, c3 int, c4 int, c5 int) using pax
with(minmax_columns='c1,c2');
insert into t1 select i,i,i,i,i from generate_series(1,10000000) i;
analyze t1;
CREATE TABLE t2(c1 int, c2 int, c3 int, c4 int, c5 int) with
(appendonly=true, orientation=column) distributed REPLICATED;
INSERT INTO t2 VALUES (1,1,1,1,1), (2,2,2,2,2), (3,3,3,3,3), (4,4,4,4,4);
INSERT INTO t2 select * FROM t2;
INSERT INTO t2 select * FROM t2;
INSERT INTO t2 select * FROM t2;
set gp_enable_runtime_filter_pushdown to off;
EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF)
SELECT t1.c3 FROM t1, t2 WHERE t1.c2 = t2.c2;
QUERY PLAN
----------------------------------------------------------------------------------
Gather Motion 1:1 (slice1; segments: 1) (actual rows=32 loops=1)
-> Hash Join (actual rows=32 loops=1)
Hash Cond: (t1.c2 = t2.c2)
Extra Text: Hash chain length 8.0 avg, 8 max, using 4 of 524288
buckets.
-> Seq Scan on t1 (actual rows=10000000 loops=1)
-> Hash (actual rows=32 loops=1)
Buckets: 524288 Batches: 1 Memory Usage: 4098kB
-> Seq Scan on t2 (actual rows=32 loops=1)
Optimizer: GPORCA
(9 rows)
Time: 1576.548 ms (00:01.577)
gpadmin=# set gp_enable_runtime_filter_pushdown to on;
SET
Time: 0.362 ms
gpadmin=# EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF)
SELECT t1.c3 FROM t1, t2 WHERE t1.c2 = t2.c2;
QUERY PLAN
----------------------------------------------------------------------------------
Gather Motion 1:1 (slice1; segments: 1) (actual rows=32 loops=1)
-> Hash Join (actual rows=32 loops=1)
Hash Cond: (t1.c2 = t2.c2)
Extra Text: Hash chain length 8.0 avg, 8 max, using 4 of 524288
buckets.
-> Seq Scan on t1 (actual rows=131072 loops=1)
-> Hash (actual rows=32 loops=1)
Buckets: 524288 Batches: 1 Memory Usage: 4098kB
-> Seq Scan on t2 (actual rows=32 loops=1)
Optimizer: GPORCA
(9 rows)
Time: 38.471 ms
```
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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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### Breaking Changes
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