wombatu-kun commented on code in PR #20314:
URL: https://github.com/apache/hudi/pull/20314#discussion_r4267334255
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hudi-flink-datasource/hudi-flink/src/main/java/org/apache/hudi/table/HoodieTableSource.java:
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@@ -496,7 +499,39 @@ private Option<Function<Integer, Integer>>
getDataBucketFunc(List<ResolvedExpres
if (!ExpressionUtils.isFilteringByAllFields(indexKeyFilters,
indexKeyFields)) {
return Option.empty();
}
- return Option.of(PrimaryKeyPruners.getBucketIdFunc(indexKeyFilters, conf));
+ return resolvePrefixedSingleFieldKey()
+ .map(prefixedSingleFieldKey ->
PrimaryKeyPruners.getBucketIdFunc(indexKeyFilters, conf,
prefixedSingleFieldKey));
+ }
+
+ /**
+ * Resolves whether the bucket writers hash a single record key field as
{@code <field>:<value>}.
+ *
+ * @return empty when the form of the stored record keys cannot be
determined, which skips the bucket pruning
+ */
+ private Option<Boolean> resolvePrefixedSingleFieldKey() {
Review Comment:
Done 78f2420d4eae: the helper reads only the encoding recorded in the table
config the meta client has already loaded, and skips the pruning for a table
that has not recorded it yet instead of deducing it from the data. The conf
alone cannot replace that check: a `FIELD_PREFIXED` table keyed by Spark and
read by a single-partition job would return no rows
(`ITTestHoodieDataSource#testBucketPruningWithPrefixedKeysAndSinglePartitionField`).
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