Module datarush.library

Package com.pervasive.datarush.operators.record

Provides operators for manipulating record structure. This encompasses a number of activities:

• Adding new fields to or modifying existing fields of the record. This can be either injection or replacement with a constant or derived value. Values are derived from the field of the record using ScalarValuedFunctions.
• Deleting, renaming, or reordering fields of the record.
• Combining records from two sources into a single record in a pairwise fashion. For combining records based on shared keys, use join operators.

Class Summary

Class	Description
ColumnsToRows	Normalize records by transposing values from row columns into multiple rows.
DeriveFields	Applies one or more functions to the input record data.
DiscoverDomain	Utility operator for discovering the domain of string fields.
FieldDerivation	Defines how a field's value in the output is derived from fields in the input.
FilterFields	Base class for operators which filter fields in the input records.
MergeFields	Merges two streams of data with an equivalent number of rows into one.
RemapFields	Rearranges and renames fields in a record.
RemoveFields	Removes a subset of fields from the input records.
RetainFields	Preserves a subset of fields from the input records.
RowsToColumns	The RowsToColumns operator is used to pivot data from a narrow representation (rows) into a wider representation (columns).
SelectFields	Preserves a subset of fields from the input records.