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Posted to reviews@iotdb.apache.org by GitBox <gi...@apache.org> on 2020/06/02 10:54:26 UTC

[GitHub] [incubator-iotdb] JulianFeinauer opened a new pull request #1305: IOTDB-734 Add Support for NaN in Double / Floats in SQL Syntax.

JulianFeinauer opened a new pull request #1305:
URL: https://github.com/apache/incubator-iotdb/pull/1305


   


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[GitHub] [incubator-iotdb] sonarcloud[bot] commented on pull request #1305: IOTDB-734 Add Support for NaN in Double / Floats in SQL Syntax.

Posted by GitBox <gi...@apache.org>.
sonarcloud[bot] commented on pull request #1305:
URL: https://github.com/apache/incubator-iotdb/pull/1305#issuecomment-640534746


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[GitHub] [incubator-iotdb] qiaojialin commented on a change in pull request #1305: IOTDB-734 Add Support for NaN in Double / Floats in SQL Syntax.

Posted by GitBox <gi...@apache.org>.
qiaojialin commented on a change in pull request #1305:
URL: https://github.com/apache/incubator-iotdb/pull/1305#discussion_r435333070



##########
File path: server/src/main/java/org/apache/iotdb/db/utils/TypeInferenceUtils.java
##########
@@ -65,6 +64,9 @@ public static TSDataType getPredictedDataType(Object value, boolean inferType) {
         } else {
           return floatingStringInferType;
         }
+        // "NaN" is returned if the NaN Literal is given in Parser
+      } else if ("NaN".equals(strValue)) {
+        return TSDataType.DOUBLE;

Review comment:
       You could add nan_string_infer_type=DOUBLE in server/src/assembly/resources/conf/iotdb-engine.properties, Then add itmes in IoTDBDescriptor and IoTDBConfig class. 
   After adding this, the docs should be updated in docs/UserGuide/Server/Config Manual.md.
   
   I will add some system design doc for how to do these things.




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[GitHub] [incubator-iotdb] JulianFeinauer commented on a change in pull request #1305: IOTDB-734 Add Support for NaN in Double / Floats in SQL Syntax.

Posted by GitBox <gi...@apache.org>.
JulianFeinauer commented on a change in pull request #1305:
URL: https://github.com/apache/incubator-iotdb/pull/1305#discussion_r435208839



##########
File path: server/src/main/java/org/apache/iotdb/db/utils/TypeInferenceUtils.java
##########
@@ -65,6 +64,9 @@ public static TSDataType getPredictedDataType(Object value, boolean inferType) {
         } else {
           return floatingStringInferType;
         }
+        // "NaN" is returned if the NaN Literal is given in Parser
+      } else if ("NaN".equals(strValue)) {
+        return TSDataType.DOUBLE;

Review comment:
       Yes, that makes sense to me. I will add that option (if I find out how this works...:D).




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[GitHub] [incubator-iotdb] sonarcloud[bot] commented on pull request #1305: IOTDB-734 Add Support for NaN in Double / Floats in SQL Syntax.

Posted by GitBox <gi...@apache.org>.
sonarcloud[bot] commented on pull request #1305:
URL: https://github.com/apache/incubator-iotdb/pull/1305#issuecomment-637487497


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[GitHub] [incubator-iotdb] sonarcloud[bot] removed a comment on pull request #1305: IOTDB-734 Add Support for NaN in Double / Floats in SQL Syntax.

Posted by GitBox <gi...@apache.org>.
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[GitHub] [incubator-iotdb] qiaojialin commented on a change in pull request #1305: IOTDB-734 Add Support for NaN in Double / Floats in SQL Syntax.

Posted by GitBox <gi...@apache.org>.
qiaojialin commented on a change in pull request #1305:
URL: https://github.com/apache/incubator-iotdb/pull/1305#discussion_r435207961



##########
File path: server/src/main/java/org/apache/iotdb/db/utils/TypeInferenceUtils.java
##########
@@ -65,6 +64,9 @@ public static TSDataType getPredictedDataType(Object value, boolean inferType) {
         } else {
           return floatingStringInferType;
         }
+        // "NaN" is returned if the NaN Literal is given in Parser
+      } else if ("NaN".equals(strValue)) {
+        return TSDataType.DOUBLE;

Review comment:
       I prefer to add a configuration nan_string_infer_type=DOUBLE  by default and enable users to change this to TEXT.




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[GitHub] [incubator-iotdb] JulianFeinauer commented on a change in pull request #1305: IOTDB-734 Add Support for NaN in Double / Floats in SQL Syntax.

Posted by GitBox <gi...@apache.org>.
JulianFeinauer commented on a change in pull request #1305:
URL: https://github.com/apache/incubator-iotdb/pull/1305#discussion_r435013169



##########
File path: server/src/main/java/org/apache/iotdb/db/utils/TypeInferenceUtils.java
##########
@@ -65,6 +64,9 @@ public static TSDataType getPredictedDataType(Object value, boolean inferType) {
         } else {
           return floatingStringInferType;
         }
+        // "NaN" is returned if the NaN Literal is given in Parser
+      } else if ("NaN".equals(strValue)) {
+        return TSDataType.DOUBLE;

Review comment:
       Good Hint. Personally I would see Nan as a Double Literal and thus probably use the check on floating_string_infer_type. WDYT?




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[GitHub] [incubator-iotdb] JulianFeinauer commented on a change in pull request #1305: IOTDB-734 Add Support for NaN in Double / Floats in SQL Syntax.

Posted by GitBox <gi...@apache.org>.
JulianFeinauer commented on a change in pull request #1305:
URL: https://github.com/apache/incubator-iotdb/pull/1305#discussion_r436250975



##########
File path: server/src/main/java/org/apache/iotdb/db/utils/TypeInferenceUtils.java
##########
@@ -65,6 +64,9 @@ public static TSDataType getPredictedDataType(Object value, boolean inferType) {
         } else {
           return floatingStringInferType;
         }
+        // "NaN" is returned if the NaN Literal is given in Parser
+      } else if ("NaN".equals(strValue)) {
+        return TSDataType.DOUBLE;

Review comment:
       Thanks for the advice, I have done it. And also added notes for the other inference config properties as they were missing so far.




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[GitHub] [incubator-iotdb] qiaojialin commented on a change in pull request #1305: IOTDB-734 Add Support for NaN in Double / Floats in SQL Syntax.

Posted by GitBox <gi...@apache.org>.
qiaojialin commented on a change in pull request #1305:
URL: https://github.com/apache/incubator-iotdb/pull/1305#discussion_r434953863



##########
File path: server/src/main/java/org/apache/iotdb/db/utils/TypeInferenceUtils.java
##########
@@ -65,6 +64,9 @@ public static TSDataType getPredictedDataType(Object value, boolean inferType) {
         } else {
           return floatingStringInferType;
         }
+        // "NaN" is returned if the NaN Literal is given in Parser
+      } else if ("NaN".equals(strValue)) {
+        return TSDataType.DOUBLE;

Review comment:
       Hi, there are some configurations for type inference, such as floating_string_infer_type, integer_string_infer_type, and boolean_string_infer_type. Do we need to add a nan_string_infer_type configuration?




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[GitHub] [incubator-iotdb] sonarcloud[bot] removed a comment on pull request #1305: IOTDB-734 Add Support for NaN in Double / Floats in SQL Syntax.

Posted by GitBox <gi...@apache.org>.
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[GitHub] [incubator-iotdb] sonarcloud[bot] commented on pull request #1305: IOTDB-734 Add Support for NaN in Double / Floats in SQL Syntax.

Posted by GitBox <gi...@apache.org>.
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URL: https://github.com/apache/incubator-iotdb/pull/1305#issuecomment-640516218


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[GitHub] [incubator-iotdb] jixuan1989 merged pull request #1305: IOTDB-734 Add Support for NaN in Double / Floats in SQL Syntax.

Posted by GitBox <gi...@apache.org>.
jixuan1989 merged pull request #1305:
URL: https://github.com/apache/incubator-iotdb/pull/1305


   


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