dropColumns_

swordfish.function.dropColumns_()

Delete one or multiple columns from a table. Note that deleting a partitioning column from a DFS table is not supported.

参数:

• table (Constant) -- A table object. It is an in-memory table or a DFS table (for OLAP engine only).

• colNames (Constant) -- A STRING scalar/vector indicating a column name. If table is a DFS table, it must be a scalar.