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column:  Column names can contain any Unicode character. Any column name that is specified within backticks (`) is treated literally. Within a backtick string, use double backticks (``) to represent a backtick character.
none:  Only alphanumeric and underscore characters are valid in identifiers. Backticked names are interpreted as regular expressions. This is also the behavior in releases prior to 0.13.0.

hive.plan.serialization.format

• Default Value: kryo
• Added In: Hive 0.13.0 with HIVE-1511

Query plan format serialization between client and task nodes. Two supported values are kryo and javaXML. Kryo is the default.

hive.exec.check.crossproducts

• Default Value: true
• Added In: Hive 0.13.0 with HIVE-6643

Check if a query plan contains a cross product. If there is one, output a warning to the session's console.

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