Xiao Li created SPARK-16157:
-------------------------------
Summary: Add New Methods for Comments in StructField and StructType
Key: SPARK-16157
URL: https://issues.apache.org/jira/browse/SPARK-16157
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 2.0.0
Reporter: Xiao Li
Currently, the column-related comment attribute is stored in {{Metadata}}. For
example,
{{noformat}}
StructType(
StructField("cl1", IntegerType, nullable = false,
new MetadataBuilder().putString("comment", "test").build()) :: Nil)
{{noformat}}
Compared with the existing SQL interface, it is not user friendly to add such a
comment attribute when defining a {{StructField}}.
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