Dual textual/graphical programming interfaces for streaming data processing pipelines

Systems and methods are disclosed for implementing dual textual/graphical programming interfaces for programming streaming data processing pipelines. A user interface is provided that enables a user to author a processing pipeline as a query in a query language, and to request conversion of that query language into a graph data structure representation of the pipeline, which can be visualized in the interface. The interface further enables modification of the graph via interaction with the visualization. On request, the modified graph can be converted back into the query language, with the querying being modified to reflect the modifications to the graph.