adarshsanjeev commented on code in PR #12386:
URL: https://github.com/apache/druid/pull/12386#discussion_r862680688


##########
sql/src/main/java/org/apache/druid/sql/calcite/parser/DruidSqlParserUtils.java:
##########
@@ -167,4 +189,89 @@ public static Granularity 
convertSqlNodeToGranularity(SqlNode sqlNode) throws Pa
         TimeFloorOperatorConversion.SQL_FUNCTION_NAME
     ));
   }
+
+  public static List<String> validateQueryAndConvertToIntervals(
+      SqlNode replaceTimeQuery,
+      Granularity granularity,
+      DateTimeZone dateTimeZone
+  ) throws ValidationException
+  {
+    if (replaceTimeQuery instanceof SqlLiteral && 
"all".equalsIgnoreCase(((SqlLiteral) replaceTimeQuery).toValue())) {
+      return ImmutableList.of("all");
+    }
+
+    DimFilter dimFilter = convertQueryToDimFilter(replaceTimeQuery, 
dateTimeZone);
+    if 
(!ImmutableSet.of(ColumnHolder.TIME_COLUMN_NAME).equals(dimFilter.getRequiredColumns()))
 {
+      throw new ValidationException("Only " + ColumnHolder.TIME_COLUMN_NAME + 
" column is supported in OVERWRITE WHERE clause");
+    }
+
+    Filtration filtration = Filtration.create(dimFilter);
+    filtration = MoveTimeFiltersToIntervals.instance().apply(filtration);
+    List<Interval> intervals = filtration.getIntervals();
+
+    for (Interval interval : intervals) {
+      DateTime intervalStart = interval.getStart();
+      DateTime intervalEnd = interval.getEnd();
+      if (!granularity.bucketStart(intervalStart).equals(intervalStart) || 
!granularity.bucketStart(intervalEnd).equals(intervalEnd)) {
+        throw new ValidationException("OVERWRITE WHERE clause contains an 
interval which is not aligned with PARTITIONED BY granularity");
+      }
+    }
+    return intervals
+        .stream()
+        .map(AbstractInterval::toString)
+        .collect(Collectors.toList());
+  }
+
+  public static DimFilter convertQueryToDimFilter(SqlNode replaceTimeQuery, 
DateTimeZone dateTimeZone)
+      throws ValidationException
+  {
+    if (replaceTimeQuery instanceof SqlBasicCall) {

Review Comment:
   Changed



##########
sql/src/main/java/org/apache/druid/sql/calcite/parser/DruidSqlParserUtils.java:
##########
@@ -167,4 +189,89 @@ public static Granularity 
convertSqlNodeToGranularity(SqlNode sqlNode) throws Pa
         TimeFloorOperatorConversion.SQL_FUNCTION_NAME
     ));
   }
+
+  public static List<String> validateQueryAndConvertToIntervals(
+      SqlNode replaceTimeQuery,
+      Granularity granularity,
+      DateTimeZone dateTimeZone
+  ) throws ValidationException
+  {
+    if (replaceTimeQuery instanceof SqlLiteral && 
"all".equalsIgnoreCase(((SqlLiteral) replaceTimeQuery).toValue())) {
+      return ImmutableList.of("all");
+    }
+
+    DimFilter dimFilter = convertQueryToDimFilter(replaceTimeQuery, 
dateTimeZone);
+    if 
(!ImmutableSet.of(ColumnHolder.TIME_COLUMN_NAME).equals(dimFilter.getRequiredColumns()))
 {
+      throw new ValidationException("Only " + ColumnHolder.TIME_COLUMN_NAME + 
" column is supported in OVERWRITE WHERE clause");
+    }
+
+    Filtration filtration = Filtration.create(dimFilter);
+    filtration = MoveTimeFiltersToIntervals.instance().apply(filtration);
+    List<Interval> intervals = filtration.getIntervals();
+
+    for (Interval interval : intervals) {
+      DateTime intervalStart = interval.getStart();
+      DateTime intervalEnd = interval.getEnd();
+      if (!granularity.bucketStart(intervalStart).equals(intervalStart) || 
!granularity.bucketStart(intervalEnd).equals(intervalEnd)) {
+        throw new ValidationException("OVERWRITE WHERE clause contains an 
interval which is not aligned with PARTITIONED BY granularity");

Review Comment:
   Added



##########
sql/src/main/java/org/apache/druid/sql/calcite/parser/DruidSqlParserUtils.java:
##########
@@ -167,4 +189,89 @@ public static Granularity 
convertSqlNodeToGranularity(SqlNode sqlNode) throws Pa
         TimeFloorOperatorConversion.SQL_FUNCTION_NAME
     ));
   }
+
+  public static List<String> validateQueryAndConvertToIntervals(
+      SqlNode replaceTimeQuery,
+      Granularity granularity,
+      DateTimeZone dateTimeZone
+  ) throws ValidationException
+  {
+    if (replaceTimeQuery instanceof SqlLiteral && 
"all".equalsIgnoreCase(((SqlLiteral) replaceTimeQuery).toValue())) {

Review Comment:
   Done



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