[
https://issues.apache.org/jira/browse/BEAM-12100?focusedWorklogId=634174&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-634174
]
ASF GitHub Bot logged work on BEAM-12100:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 05/Aug/21 11:21
Start Date: 05/Aug/21 11:21
Worklog Time Spent: 10m
Work Description: ibzib commented on a change in pull request #15174:
URL: https://github.com/apache/beam/pull/15174#discussion_r683018811
##########
File path:
sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/rel/BeamAggregationRel.java
##########
@@ -246,6 +250,67 @@ private Transform(
validateWindowIsSupported(windowedStream);
+ PTransform<PCollection<Row>, PCollection<Row>> combiner =
createCombiner();
+
+ boolean verifyRowValues =
+
pinput.getPipeline().getOptions().as(BeamSqlPipelineOptions.class).getVerifyRowValues();
+ return windowedStream
+ .apply(combiner)
+ .apply(
+ "mergeRecord",
+ ParDo.of(mergeRecord(outputSchema, windowFieldIndex,
ignoreValues, verifyRowValues)))
+ .setRowSchema(outputSchema);
+ }
+
+ private PTransform<PCollection<Row>, PCollection<Row>> createCombiner() {
+ // Check if have fields to be grouped
+ if (groupSetCount > 0) {
+ return createGroupCombiner();
+ }
+ return createGlobalCombiner();
+ }
+
+ private PTransform<PCollection<Row>, PCollection<Row>>
createGlobalCombiner() {
+ org.apache.beam.sdk.schemas.transforms.Group.Global<Row> globally =
+ org.apache.beam.sdk.schemas.transforms.Group.globally();
+ org.apache.beam.sdk.schemas.transforms.Group.CombineFieldsGlobally<Row>
combined = null;
+ for (FieldAggregation fieldAggregation : fieldAggregations) {
+ List<Integer> inputs = fieldAggregation.inputs;
+ CombineFn combineFn = fieldAggregation.combineFn;
+ if (inputs.size() > 1 || inputs.isEmpty()) {
+ // In this path we extract a Row (an empty row if inputs.isEmpty).
+ combined =
+ (combined == null)
+ ? globally.aggregateFieldsById(inputs, combineFn,
fieldAggregation.outputField)
+ : combined.aggregateFieldsById(inputs, combineFn,
fieldAggregation.outputField);
+ } else {
+ // Combining over a single field, so extract just that field.
+ combined =
+ (combined == null)
+ ? globally.aggregateField(inputs.get(0), combineFn,
fieldAggregation.outputField)
+ : combined.aggregateField(inputs.get(0), combineFn,
fieldAggregation.outputField);
+ }
+ }
+
+ PTransform<PCollection<Row>, PCollection<Row>> combiner = combined;
+ if (combiner == null) {
+ // If no field aggregations were specified, we run a constant combiner
that always returns
+ // a single empty row for each key. This is used by the SELECT
DISTINCT query plan - in this
+ // case a group by is generated to determine unique keys, and a
constant null combiner is
+ // used.
+ combiner =
+ globally.aggregateField(
+ "*",
+ AggregationCombineFnAdapter.createConstantCombineFn(),
+ Field.of(
+ "e",
+
FieldType.row(AggregationCombineFnAdapter.EMPTY_SCHEMA).withNullable(true)));
+ ignoreValues = true;
+ }
+ return combiner;
+ }
Review comment:
It looks like the incorrect null value is coming from here:
https://github.com/apache/beam/blob/39cf3fccbb3950b9fd0c8938301d192c3ca85cce/sdks/java/core/src/main/java/org/apache/beam/sdk/transforms/Combine.java#L515
You can fix it by overriding the `identity()` method in `LongSum`. Or maybe
you could change it back to `Sum.ofLongs`, I'm not sure why it needed a
separate definition here?
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Issue Time Tracking
-------------------
Worklog Id: (was: 634174)
Time Spent: 1h 40m (was: 1.5h)
> SUM should error when overflow/underflow occurs.
> ------------------------------------------------
>
> Key: BEAM-12100
> URL: https://issues.apache.org/jira/browse/BEAM-12100
> Project: Beam
> Issue Type: Bug
> Components: dsl-sql-zetasql
> Reporter: Kyle Weaver
> Assignee: Benjamin Gonzalez
> Priority: P3
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
> SELECT SUM(col1) FROM (SELECT CAST(9223372036854775807 as int64) as col1
> UNION ALL SELECT CAST(1 as int64))
> should return an error.
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