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Version: Java (Groovy)

MultiJoinTable

A MultiJoinTable object is a container for the table that results from a Multi-Join operation.

Methods​

MultiJoinTable.keyColumns()
MultiJoinTable.table()

Parameters​

Neither of MultiJoinTable's methods take parameters.

Returns​

  • MultiJoinTable.keyColumns() returns the MultiJoinTable's key column names as a collection of strings.
  • MultiJoinTable.table() returns the MultiJoinTable's underlying table.

Examples​

// import multijoin classes
import io.deephaven.engine.table.MultiJoinFactory
import io.deephaven.engine.table.MultiJoinTable

// create tables
t1 = newTable(stringCol("Letter", "A", "B", "C", "D"), intCol("Number", 1, 2, 3, 4))
t2 = newTable(stringCol("Letter", "C", "B", "D", "A"), intCol("Number", 6, 7, 8, 9))
t3 = newTable(stringCol("Letter", "D", "C", "A", "B"), intCol("Number", 9, 8, 7, 6))

// create a MultiJoinTable object and join the three tables
MultiJoinTable mtTable = MultiJoinFactory.of("Letter, Number", t1, t2, t3)

// access the multijoin object's internal table
result = mtTable.table()

// access the multijoin object's key columns
println mtTable.keyColumns()