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https://issues.apache.org/jira/browse/BEAM-10240?focusedWorklogId=466509&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-466509
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ASF GitHub Bot logged work on BEAM-10240:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 04/Aug/20 22:55
Start Date: 04/Aug/20 22:55
Worklog Time Spent: 10m
Work Description: apilloud commented on a change in pull request #12348:
URL: https://github.com/apache/beam/pull/12348#discussion_r465373933
##########
File path:
sdks/java/extensions/sql/zetasql/src/main/java/org/apache/beam/sdk/extensions/sql/zetasql/translation/ExpressionConverter.java
##########
@@ -850,6 +848,25 @@ private RexNode convertSimpleValueToRexNode(TypeKind kind,
Value value) {
// TODO: Doing micro to mills truncation, need to throw exception.
ret = rexBuilder().makeLiteral(convertTimeValueToTimeString(value),
timeType, false);
break;
+ case TYPE_DATETIME:
+ // Cannot simply call makeTimestampWithLocalTimeZoneLiteral() for
ZetaSQL DATETIME type
+ // because later it will be unparsed to the string representation of
timestamp (e.g. "SELECT
+ // DATETIME '2008-12-25 15:30:00'" will be unparsed to "SELECT
TIMESTAMP '2008-12-25
+ // 15:30:00:000000'"). So we create a wrapper function here such that
we can later recognize
+ // it and customize its unparsing in BeamBigQuerySqlDialect.
+ ret =
+ rexBuilder()
+ .makeCall(
+ SqlOperators.createZetaSqlFunction(
+ BeamBigQuerySqlDialect.DATETIME_LITERAL_FUNCTION,
Review comment:
Instead of wrapping with a function here, it looks like you can do the
same thing by creating a class overloading `SqlTimestampLiteral.toString()` and
wrapping it in `BeamSqlUnparseContext`? This would reduce the complexity at the
Rel layer.
https://github.com/apache/beam/blob/6fdde4f4eab72b49b10a8bb1cb3be263c5c416b5/sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/meta/provider/bigquery/BeamSqlUnparseContext.java#L70
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Issue Time Tracking
-------------------
Worklog Id: (was: 466509)
Time Spent: 2h 40m (was: 2.5h)
> Support ZetaSQL DATETIME functions in BeamSQL
> ---------------------------------------------
>
> Key: BEAM-10240
> URL: https://issues.apache.org/jira/browse/BEAM-10240
> Project: Beam
> Issue Type: New Feature
> Components: dsl-sql-zetasql
> Reporter: Robin Qiu
> Assignee: Zijie Song
> Priority: P2
> Time Spent: 2h 40m
> Remaining Estimate: 0h
>
> Support *all* DATETIME functions defined in ZetaSQL (BigQuery Standard SQL).
> See the list of functions below:
> [https://github.com/google/zetasql/blob/master/docs/datetime_functions.md|https://github.com/google/zetasql/blob/master/docs/time_functions.md]
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