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Version: Java (Groovy)

uniqueKeys

The uniqueKeys method returns a boolean indicating whether the keys (key column values for a row considered as a tuple) in the underlying partitioned table are unique.

If keys are unique, one can expect that table().selectDistinct(keyColumnNames.toArray(String[]::new)) is equivalent to table().view(keyColumnNames.toArray(String[]::new)).

Syntax​

uniqueKeys()

Parameters​

This function does not take any parameters.

Returns​

A boolean indicating whether the keys in the underlying partitioned table are unique.

Examples​

source = newTable(
    stringCol("X", "A", "B", "A", "C", "B", "A", "B", "B", "C"),
    stringCol("Y", "M", "N", "O", "N", "P", "M", "O", "P", "M"),
    intCol("Number", 55, 76, 20, 130, 230, 50, 73, 137, 214),
)

partitionedTable = source.partitionBy("X")

println partitionedTable.uniqueKeys()