gvvinblade commented on a change in pull request #7673: IGNITE-12864: Calcite
integration. UNION support.
URL: https://github.com/apache/ignite/pull/7673#discussion_r409529543
##########
File path:
modules/calcite/src/main/java/org/apache/ignite/internal/processors/query/calcite/trait/DistributionTrait.java
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@@ -139,14 +139,34 @@
/** {@inheritDoc} */
@Override public IgniteDistribution apply(Mappings.TargetMapping mapping) {
- if (keys.isEmpty())
+ if (getType() != HASH_DISTRIBUTED)
return this;
- assert getType() == HASH_DISTRIBUTED;
+ if (mapping.getTargetCount() < keys.size())
+ IgniteDistributions.random();
- ImmutableIntList newKeys =
IgniteDistributions.projectDistributionKeys(mapping, keys);
+ int[] map = new int[mapping.getSourceCount()];
+ int[] res = new int[keys.size()];
- return newKeys.isEmpty() ? IgniteDistributions.random() :
IgniteDistributions.hash(newKeys, function);
+ for (int i = 0; i < keys.size(); i++)
+ map[keys.getInt(i)] = i + 1;
+
+ for (int i = 0, found = 0; i < mapping.getTargetCount(); i++) {
+ int source = mapping.getSourceOpt(i);
+ int keyPos = map[source] - 1;
+
+ if (keyPos == -1)
+ continue;
+
+ res[keyPos] = i;
+
+ if (++found == keys.size())
+ return IgniteDistributions.hash(ImmutableIntList.of(res),
function);
Review comment:
Actually almost the same, but TargetMapping and Mapping are different
interfaces
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