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Version: Java (Groovy)

keyColumnNames

The keyColumnNames method returns the names of all "key" columns that are part of table().getDefinition(). If there are no key columns, the result will be empty. This set is explicitly ordered.

Syntax​

keyColumnNames()

Parameters​

This function does not take any parameters.

Returns​

The names of all "key" columns that are part of table().getDefinition(), as a Set<String>.

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.keyColumnNames()