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https://issues.apache.org/jira/browse/SPARK-10805?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen updated SPARK-10805:
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Target Version/s: (was: 1.4.1)
Priority: Minor (was: Critical)
> JSON Data Frame does not return correct string lengths
> ------------------------------------------------------
>
> Key: SPARK-10805
> URL: https://issues.apache.org/jira/browse/SPARK-10805
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 1.4.1
> Reporter: Jeff Li
> Priority: Minor
>
> Here is the sample code to run the test
> @Test
> public void runSchemaTest() throws Exception {
> DataFrame jsonDataFrame =
> sqlContext.jsonFile("src/test/resources/jsontransform/json.sampledata.json");
> jsonDataFrame.printSchema();
> StructType jsonSchema = jsonDataFrame.schema();
> StructField[] dataFields = jsonSchema.fields();
> for ( int fieldIndex = 0; fieldIndex < dataFields.length;
> fieldIndex++) {
> StructField aField = dataFields[fieldIndex];
> DataType aType = aField.dataType();
> System.out.println("name: " + aField.name() + " type: "
> + aType.typeName()
> + " size: " +aType.defaultSize());
> }
> }
> name: _id type: string size: 4096
> name: firstName type: string size: 4096
> name: lastName type: string size: 4096
> In my case, the _id: 1 character, first name: 4 characters, and last name: 7
> characters).
> The Spark JSON Data frame should have a way to tell the maximum length of
> each JSON String elements in the JSON document.
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