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Version: Java (Groovy)

proxy

The proxy method creates a PartitionedTable.Proxy that allows table operations to be applied to the constituent tables of the source PartitionedTable.

Each operation thus applied will produce a new PartitionedTable with the results, as in transform(UnaryOperator, Dependency...) or partitionedTransform(PartitionedTable, BinaryOperator, Dependency...), and return a new proxy to that PartitionedTable.

note

If the proxy overload with no parameters is used, the result is the same as proxy(true, true).

Syntax​

proxy()
proxy(requireMatchingKeys, sanityCheckJoinOperations)

Parameters​

ParameterTypeDescription
requireMatchingKeysboolean

Whether to ensure that both partitioned tables have all the same keys present when a proxied operation uses this and another PartitionedTable as inputs for a partitioned transform.

sanityCheckJoinOperationsboolean

Whether to check that proxied join operations will only find a given join key in one constituent table for this and the table argument if it is also a proxy.

Returns​

A PartitionedTable.Proxy that allows table operations to be applied to the constituent tables of the source PartitionedTable.

Examples​


source = emptyTable(10).update('Key = (i % 2 == 0) ? `X` : `Y`', 'Value = i')

partitionedTable = source.partitionBy('Key')

ptProxy = partitionedTable.proxy()

result = source.reverse()
proxyReversed = ptProxy.reverse()
resultFromProxy = proxyReversed.target.merge()