olivrlee commented on code in PR #3009:
URL: https://github.com/apache/calcite/pull/3009#discussion_r1065125968
##########
core/src/main/codegen/templates/Parser.jj:
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@@ -5050,6 +5050,86 @@ SqlIntervalQualifier TimeUnitOrName() : {
}
}
+ SqlIntervalQualifier TimeUnitOrNameForDateTrunc() : {
+ final TimeUnit timeUnit;
+ final SqlIntervalQualifier weekdayIntervalQualifier;
+ final SqlIdentifier unitName;
+}
+{
+ LOOKAHEAD(1)
+ timeUnit = TimeUnitForDateTrunc() {
+ return new SqlIntervalQualifier(timeUnit, null, getPos());
+ }
+|
+ weekdayIntervalQualifier = WeekWeekdaySqlIntervalQualifier() {
+ return weekdayIntervalQualifier;
+ }
+|
+ unitName = DateTruncIdentifiers() {
+ return new SqlIntervalQualifier(unitName.getSimple(),
+ unitName.getParserPosition());
+ }
+}
+
+/** Parses time unit for the DATE_TRUNC function.
+* This is a subset of time units appropriate for DATE data type.
+*/
+TimeUnit TimeUnitForDateTrunc() : {}
+{
+ <DAY> { return TimeUnit.DAY; }
+| <MONTH> { return TimeUnit.MONTH; }
+| <QUARTER> { return TimeUnit.QUARTER; }
+| <YEAR> { return TimeUnit.YEAR; }
+}
+
+SqlIntervalQualifier WeekWeekdaySqlIntervalQualifier() : {
+ final String weekdayName;
+}
+{
+ weekdayName = WeekWeekday() {
+ return new SqlIntervalQualifier(weekdayName, getPos());
+ }
+}
+String WeekWeekday() :
Review Comment:
Yep I have this followup https://issues.apache.org/jira/browse/CALCITE-5450
to add to all the other functions, but I'd like to get this reviewed before I
go and do that
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