zhangyue-hashdata commented on code in PR #724:
URL: https://github.com/apache/cloudberry/pull/724#discussion_r2017870102
##########
src/backend/executor/nodeSeqscan.c:
##########
@@ -365,3 +398,60 @@ ExecSeqScanInitializeWorker(SeqScanState *node,
}
node->ss.ss_currentScanDesc = scandesc;
}
+
+/*
+ * Returns true if the element may be in the bloom filter.
+ */
+static bool
+PassByBloomFilter(SeqScanState *node, TupleTableSlot *slot)
+{
+ ScanKey sk;
+ Datum val;
+ bool isnull;
+ ListCell *lc;
+ bloom_filter *blm_filter;
+
+ foreach (lc, node->filters)
+ {
+ sk = lfirst(lc);
+ if (sk->sk_flags != SK_BLOOM_FILTER)
+ continue;
+
+ val = slot_getattr(slot, sk->sk_attno, &isnull);
+ if (isnull)
+ continue;
+
+ blm_filter = (bloom_filter *)DatumGetPointer(sk->sk_argument);
+ if (bloom_lacks_element(blm_filter, (unsigned char *)&val,
sizeof(Datum)))
+ return false;
+ }
+
+ return true;
+}
+
+/*
+ * Convert the list of ScanKey to the array, and append an emtpy ScanKey as
+ * the end flag of the array.
+ */
+static ScanKey
+ScanKeyListToArray(List *keys, int *num)
+{
+ ScanKey sk;
+
+ if (list_length(keys) == 0)
+ return NULL;
+
+ Assert(num);
+ *num = list_length(keys);
+
+ sk = (ScanKey)palloc(sizeof(ScanKeyData) * (*num + 1));
+ for (int i = 0; i < *num; ++i)
+ memcpy(&sk[i], list_nth(keys, i), sizeof(ScanKeyData));
+
+ /*
+ * SK_EMPYT means the end of the array of the ScanKey
+ */
+ sk[*num].sk_flags = SK_EMPYT;
Review Comment:
Currently, there are no tables in CBDB that support runtime filter pushdown
to AM. So runtime filter pushdown to AM will not be supported temporarily, and
filtering operations can be performed only in SeqScan.
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