twalthr commented on a change in pull request #18342:
URL: https://github.com/apache/flink/pull/18342#discussion_r784000148



##########
File path: 
flink-table/flink-table-planner/src/test/java/org/apache/flink/table/planner/plan/nodes/exec/serde/RexNodeSerdeTest.java
##########
@@ -132,101 +130,35 @@
                                 BigDecimal.valueOf(random.nextFloat()),
                                 FACTORY.createSqlType(SqlTypeName.FLOAT)),
                         
rexBuilder.makeExactLiteral(BigDecimal.valueOf(random.nextDouble())),
-                        rexBuilder.makeIntervalLiteral(
-                                new SqlIntervalQualifier(
-                                        TimeUnit.YEAR, TimeUnit.YEAR, 
SqlParserPos.ZERO)),
                         rexBuilder.makeIntervalLiteral(
                                 BigDecimal.valueOf(100),
                                 new SqlIntervalQualifier(
-                                        TimeUnit.YEAR, TimeUnit.YEAR, 
SqlParserPos.ZERO)),
-                        rexBuilder.makeIntervalLiteral(
-                                BigDecimal.valueOf(3),
-                                new SqlIntervalQualifier(
-                                        TimeUnit.YEAR, TimeUnit.MONTH, 
SqlParserPos.ZERO)),
-                        rexBuilder.makeIntervalLiteral(
-                                new SqlIntervalQualifier(
-                                        TimeUnit.MONTH, TimeUnit.MONTH, 
SqlParserPos.ZERO)),
-                        rexBuilder.makeIntervalLiteral(
-                                BigDecimal.valueOf(3),
-                                new SqlIntervalQualifier(
-                                        TimeUnit.MONTH, TimeUnit.MONTH, 
SqlParserPos.ZERO)),
-                        rexBuilder.makeIntervalLiteral(
-                                new SqlIntervalQualifier(
-                                        TimeUnit.DAY, TimeUnit.DAY, 
SqlParserPos.ZERO)),
-                        rexBuilder.makeIntervalLiteral(
-                                BigDecimal.valueOf(3),
-                                new SqlIntervalQualifier(
-                                        TimeUnit.DAY, TimeUnit.DAY, 
SqlParserPos.ZERO)),
-                        rexBuilder.makeIntervalLiteral(
-                                new SqlIntervalQualifier(
-                                        TimeUnit.DAY, TimeUnit.HOUR, 
SqlParserPos.ZERO)),
-                        rexBuilder.makeIntervalLiteral(
-                                BigDecimal.valueOf(3),
-                                new SqlIntervalQualifier(
-                                        TimeUnit.DAY, TimeUnit.HOUR, 
SqlParserPos.ZERO)),
-                        rexBuilder.makeIntervalLiteral(
-                                new SqlIntervalQualifier(
-                                        TimeUnit.DAY, TimeUnit.MINUTE, 
SqlParserPos.ZERO)),
-                        rexBuilder.makeIntervalLiteral(
-                                BigDecimal.valueOf(3),
-                                new SqlIntervalQualifier(
-                                        TimeUnit.DAY, TimeUnit.MINUTE, 
SqlParserPos.ZERO)),
-                        rexBuilder.makeIntervalLiteral(
-                                new SqlIntervalQualifier(
-                                        TimeUnit.DAY, TimeUnit.SECOND, 
SqlParserPos.ZERO)),
-                        rexBuilder.makeIntervalLiteral(
-                                BigDecimal.valueOf(3),
-                                new SqlIntervalQualifier(
-                                        TimeUnit.DAY, TimeUnit.SECOND, 
SqlParserPos.ZERO)),
-                        rexBuilder.makeIntervalLiteral(
-                                new SqlIntervalQualifier(
-                                        TimeUnit.HOUR, TimeUnit.HOUR, 
SqlParserPos.ZERO)),
-                        rexBuilder.makeIntervalLiteral(
-                                BigDecimal.valueOf(3),
-                                new SqlIntervalQualifier(
-                                        TimeUnit.HOUR, TimeUnit.HOUR, 
SqlParserPos.ZERO)),
-                        rexBuilder.makeIntervalLiteral(
-                                new SqlIntervalQualifier(
-                                        TimeUnit.HOUR, TimeUnit.MINUTE, 
SqlParserPos.ZERO)),
-                        rexBuilder.makeIntervalLiteral(
-                                BigDecimal.valueOf(3),
-                                new SqlIntervalQualifier(
-                                        TimeUnit.HOUR, TimeUnit.MINUTE, 
SqlParserPos.ZERO)),
-                        rexBuilder.makeIntervalLiteral(
-                                new SqlIntervalQualifier(
-                                        TimeUnit.HOUR, TimeUnit.SECOND, 
SqlParserPos.ZERO)),
+                                        TimeUnit.YEAR,
+                                        4,
+                                        TimeUnit.YEAR,
+                                        RelDataType.PRECISION_NOT_SPECIFIED,
+                                        SqlParserPos.ZERO)),
                         rexBuilder.makeIntervalLiteral(
                                 BigDecimal.valueOf(3),
                                 new SqlIntervalQualifier(
-                                        TimeUnit.HOUR, TimeUnit.SECOND, 
SqlParserPos.ZERO)),
-                        rexBuilder.makeIntervalLiteral(
-                                new SqlIntervalQualifier(
-                                        TimeUnit.MINUTE, TimeUnit.MINUTE, 
SqlParserPos.ZERO)),
+                                        TimeUnit.YEAR,
+                                        2,
+                                        TimeUnit.MONTH,
+                                        RelDataType.PRECISION_NOT_SPECIFIED,
+                                        SqlParserPos.ZERO)),
                         rexBuilder.makeIntervalLiteral(
                                 BigDecimal.valueOf(3),
                                 new SqlIntervalQualifier(
-                                        TimeUnit.MINUTE, TimeUnit.MINUTE, 
SqlParserPos.ZERO)),
-                        rexBuilder.makeIntervalLiteral(
-                                new SqlIntervalQualifier(
-                                        TimeUnit.MINUTE, TimeUnit.SECOND, 
SqlParserPos.ZERO)),
+                                        TimeUnit.DAY, 2, TimeUnit.SECOND, 6, 
SqlParserPos.ZERO)),
                         rexBuilder.makeIntervalLiteral(
                                 BigDecimal.valueOf(3),
                                 new SqlIntervalQualifier(
-                                        TimeUnit.MINUTE, TimeUnit.SECOND, 
SqlParserPos.ZERO)),
-                        rexBuilder.makeIntervalLiteral(
-                                new SqlIntervalQualifier(
-                                        TimeUnit.SECOND, TimeUnit.SECOND, 
SqlParserPos.ZERO)),
-                        rexBuilder.makeIntervalLiteral(
-                                BigDecimal.valueOf(3),
-                                new SqlIntervalQualifier(
-                                        TimeUnit.SECOND, TimeUnit.SECOND, 
SqlParserPos.ZERO)),
+                                        TimeUnit.SECOND, 2, TimeUnit.SECOND, 
6, SqlParserPos.ZERO)),
                         
rexBuilder.makeDateLiteral(DateString.fromDaysSinceEpoch(10)),
                         rexBuilder.makeDateLiteral(new 
DateString("2000-12-12")),
                         
rexBuilder.makeTimeLiteral(TimeString.fromMillisOfDay(1234), 3),
                         
rexBuilder.makeTimeLiteral(TimeString.fromMillisOfDay(123456), 6),
                         rexBuilder.makeTimeLiteral(new 
TimeString("01:01:01.000000001"), 9),
-                        rexBuilder.makeTimeWithLocalTimeZoneLiteral(

Review comment:
       but time and not timestamp. I don't think that we will ever support time 
LTZ.




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