[GitHub] [incubator-iotdb] jixuan1989 commented on a change in pull request #1290: [IOTDB-718]Fix wrong time precision of NOW()

[GitBox <gi...@apache.org>]

jixuan1989 commented on a change in pull request #1290:
URL: https://github.com/apache/incubator-iotdb/pull/1290#discussion_r432817911



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File path: server/src/main/java/org/apache/iotdb/db/qp/strategy/LogicalGenerator.java
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@@ -1475,7 +1475,15 @@ long parseTimeFormat(String timestampStr) throws SQLParserException {
       throw new SQLParserException("input timestamp cannot be empty");
     }
     if (timestampStr.equalsIgnoreCase(SQLConstant.NOW_FUNC)) {
-      return System.currentTimeMillis();
+      String timePrecision = IoTDBDescriptor.getInstance().getConfig().getTimestampPrecision();
+      switch (timePrecision) {
+        case "ns":
+          return System.currentTimeMillis() * 1000_000L;

Review comment:
       When users use `now()` and set the precision as `ns` or `ms`, they want to generate dense data. if you you `System.currentTimeMillis()*1000` or `1000_000`, then many timstamps will repeat... 




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