About Operator Types
See Also
IEP operators can take streams or relations as input.
The output can be streams, relations, or entire tables.
You can categorize the operators by their input and output.
- Stream to Relation. Operators that take a stream as input, and produce a relation as output with the same schema as the stream.
- Relation to Stream. Operators that take a relation as input, and produce a stream as output with the same schema as the relation.
- Relation to Relation. Operators that take one or more relations as input, and produce a relation as output.
- Stream to Stream. Operators that take a stream as input, and produce a stream as output. The input stream and the output stream can have different schemas.
- Relation to Table. Operators that take a relation as input, and produce a table as output.
In the Palette, the operators are divided into the following categories:
- Aggregator. Aggregate or summarize data.
- Correlation and Filter. Correlation enables you to obtain data based on the relationship of two pieces of existing data. Filtering enables you to provide information to obtain a subset of data you want.
- External. Access database tables that are external to the IEP database.
- Input. Receive data from external sources.
- Output. Send data to external sources.
- Relation Converter. Convert a relation to a stream or table.
- Relation Operator. Perform operations on a relation.
- Sequence. Order events based on attributes that have sequential order.
- Stream Converter. Convert stream data to a relation.
- See Also
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- About the Operator Environment
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