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Posted to reviews@iotdb.apache.org by GitBox <gi...@apache.org> on 2021/01/15 07:29:54 UTC
[GitHub] [iotdb] haimeiguo opened a new pull request #2500: add linear fill test case for sdt encoding
haimeiguo opened a new pull request #2500:
URL: https://github.com/apache/iotdb/pull/2500
SDT algorithm uses a parallelogram to filter raw data and its height is 2 * compression deviation. After SDT compression, if user uses linear fill, the resulting values will fall inside the parallelogram of two stored points. The absolute difference between filled value and original value is <= 2 * compression deviation.
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[GitHub] [iotdb] SteveYurongSu commented on a change in pull request #2500: add linear fill test case for sdt encoding
Posted by GitBox <gi...@apache.org>.
SteveYurongSu commented on a change in pull request #2500:
URL: https://github.com/apache/iotdb/pull/2500#discussion_r559378791
##########
File path: server/src/test/java/org/apache/iotdb/db/integration/IoTDBSimpleQueryIT.java
##########
@@ -210,6 +213,57 @@ public void testSDTEncodingCompDev() throws ClassNotFoundException {
}
}
+ @Test
+ public void testSDTEncodingSelectFill() throws ClassNotFoundException {
+ Class.forName(Config.JDBC_DRIVER_NAME);
+
+ try (Connection connection = DriverManager
+ .getConnection(Config.IOTDB_URL_PREFIX + "127.0.0.1:6667/",
+ "root", "root");
+ Statement statement = connection.createStatement()) {
+ statement.setFetchSize(5);
+ statement.execute("SET STORAGE GROUP TO root.sg1");
+ double compDev = 2;
+ //test set sdt property
+ statement
+ .execute(
+ "CREATE TIMESERIES root.sg1.d0.s0 WITH DATATYPE=INT32,ENCODING=PLAIN,LOSS=SDT,COMPDEV=" + compDev);
+
+ int[] originalValues = new int[1000];
+
+ Map<String, Integer> map = new HashMap<>();
+
+ Random rand = new Random();
+ for (int i = 1; i < originalValues.length; i++) {
+ originalValues[i] = rand.nextInt(500);
+ String sql = "insert into root.sg1.d0(timestamp,s0) values(" + i + "," + originalValues[i] + ")";
+ statement.execute(sql);
+ map.put(i + "", originalValues[i]);
+ }
+ statement.execute("flush");
+
+ for (int i = 1; i < originalValues.length; i++) {
+ String sql = "select * from root where time = " + i
+ + " fill(int32 [linear, 20ms, 20ms])";
+ ResultSet resultSet = statement.executeQuery(sql);
+
+ while (resultSet.next()) {
+ String time = resultSet.getString("Time");
+ String value = resultSet.getString("root.sg1.d0.s0");
+ //last value is not stored, cannot linear fill
+ if (value == null) {
+ continue;
+ }
+ // sdt parallelogram's height is 2 * compDev, so after linear fill, the values will fall inside
+ // the parallelogram of two stored points
+ assertTrue(Math.abs(Integer.parseInt(value) - map.get(time)) <= 2 * compDev);
+ }
+ }
+ } catch (SQLException e) {
+ e.printStackTrace();
Review comment:
```suggestion
fail();
```
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[GitHub] [iotdb] sonarcloud[bot] commented on pull request #2500: add linear fill test case for sdt encoding
Posted by GitBox <gi...@apache.org>.
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URL: https://github.com/apache/iotdb/pull/2500#issuecomment-762184948
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[GitHub] [iotdb] sonarcloud[bot] commented on pull request #2500: add linear fill test case for sdt encoding
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URL: https://github.com/apache/iotdb/pull/2500#issuecomment-760716710
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[GitHub] [iotdb] qiaojialin merged pull request #2500: [IOTDB-1091] add linear fill test case for sdt encoding
Posted by GitBox <gi...@apache.org>.
qiaojialin merged pull request #2500:
URL: https://github.com/apache/iotdb/pull/2500
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[GitHub] [iotdb] sonarcloud[bot] commented on pull request #2500: add linear fill test case for sdt encoding
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URL: https://github.com/apache/iotdb/pull/2500#issuecomment-760723869
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