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https://issues.apache.org/jira/browse/BEAM-11389?focusedWorklogId=553718&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-553718
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ASF GitHub Bot logged work on BEAM-11389:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 17/Feb/21 16:37
Start Date: 17/Feb/21 16:37
Worklog Time Spent: 10m
Work Description: sonam-vend commented on a change in pull request #13817:
URL: https://github.com/apache/beam/pull/13817#discussion_r577763864
##########
File path:
sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/transform/BeamBuiltinAggregations.java
##########
@@ -495,4 +504,70 @@ public Long extractOutput(Long accumulator) {
return accumulator;
}
}
+ /**
+ * Logical_And function implementation
+ *
+ * <p>Returns the logical AND of all non-NULL expressions. Returns NULL if
there are zero input
+ * rows or expression evaluates to NULL for all rows.
+ */
+ public static class LogicalAnd extends CombineFn<Boolean, LogicalAnd.Accum,
Boolean> {
+ static class Accum {
+ /** Initially, input is empty. */
+ boolean isEmpty = true;
+ /** true if any null value is seen in the input, null values are to be
ignored. */
+ boolean isNull = false;
+ /** logical_and operation result. */
+ boolean logicalAnd = true;
+ }
+
+ @Override
+ public Accum createAccumulator() {
+ return new Accum();
+ }
+
+ @Override
+ public Accum addInput(Accum accum, Boolean input) {
+ if (input == null) {
+ accum.isNull = true;
+ return accum;
+ }
+ accum.isEmpty = false;
+ accum.isNull = false;
+ accum.logicalAnd = (accum.logicalAnd && input);
+ return accum;
+ }
+
+ @Override
+ public Accum mergeAccumulators(Iterable<Accum> accums) {
+ LogicalAnd.Accum merged = createAccumulator();
+
+ /** merged accum has isNull=true when all accums have isNull=true */
+ if (StreamSupport.stream(accums.spliterator(), false).allMatch(a ->
a.isNull)) {
+ merged.isNull = true;
+ return merged;
Review comment:
@ibzib @robinyqiu this is where I am trying to return _null only if
all_ input values are null.
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Issue Time Tracking
-------------------
Worklog Id: (was: 553718)
Time Spent: 2h 50m (was: 2h 40m)
> Implement the LOGICAL_AND function for Beam SQL ZetaSQL dialect, as CombineFn.
> ------------------------------------------------------------------------------
>
> Key: BEAM-11389
> URL: https://issues.apache.org/jira/browse/BEAM-11389
> Project: Beam
> Issue Type: Sub-task
> Components: dsl-sql-zetasql
> Reporter: Sonam Ramchand
> Priority: P2
> Time Spent: 2h 50m
> Remaining Estimate: 0h
>
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