snuyanzin commented on code in PR #25763:
URL: https://github.com/apache/flink/pull/25763#discussion_r1889027572


##########
flink-table/flink-table-common/src/main/java/org/apache/flink/table/utils/DateTimeUtils.java:
##########
@@ -365,6 +368,38 @@ public static TimestampData toTimestampData(double v, int 
precision) {
         }
     }
 
+    public static TimestampData toTimestampData(int v, int precision) {
+        switch (precision) {
+            case 0:
+                if (MIN_EPOCH_SECONDS <= v && v <= MAX_EPOCH_SECONDS) {
+                    return timestampDataFromEpochMills((v * 
MILLIS_PER_SECOND));
+                } else {
+                    return null;
+                }
+            case 3:
+                return timestampDataFromEpochMills(v);
+            default:
+                throw new TableException(
+                        "The precision value '"
+                                + precision
+                                + "' for function "
+                                + "TO_TIMESTAMP_LTZ(numeric, precision) is 
unsupported,"
+                                + " the supported value is '0' for second or 
'3' for millisecond.");
+        }
+    }
+
+    public static TimestampData toTimestampData(long epoch) {
+        return toTimestampData(epoch, DEFAULT_PRECISION);
+    }
+
+    public static TimestampData toTimestampData(double epoch) {
+        return toTimestampData(epoch, DEFAULT_PRECISION);
+    }
+
+    public static TimestampData toTimestampData(DecimalData epoch) {
+        return toTimestampData(epoch, DEFAULT_PRECISION);
+    }

Review Comment:
   Move this to function class



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