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With hive.optimize.sampling.orderby=true, probability with which a row will be chosen.

hive.compat

• Default Value: 0.12
• Added In: Hive 0.13.0 with HIVE-6012

Enable (configurable) deprecated behaviors of arithmetic operations by setting the desired level of backward compatibility. The default value gives backward-compatible return types for numeric operations. Other supported release numbers give newer behaviors for numeric operations, for example 0.13 gives the more SQL compliant return types introduced in HIVE-5356.

The value "latest" specifies the latest supported level. An invalid setting will cause an error message, and the default support level will be used.

Setting to 0.12 (default) maintains division behavior in Hive 0.12 and earlier releases: int / int = double.
Setting to 0.13 gives division behavior in Hive 0.13 and later releases: int / int = decimal.

File Formats and I/O

hive.default.fileformat

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