1. A computer implemented method for generating code for an integrated data system, the computer implemented method comprising: receiving a mixed data flow, wherein the mixed data flow contains mixed data flow operators, which are associated with a plurality of runtime environments; responsive to receiving the mixed data flow, generating a graph containing logical operators based on the mixed data flow, wherein the logical operators are independent of the plurality of runtime environments; converting the graph to a model wherein the logical operators are converted to model operators associated with the plurality of runtime environments, wherein the model operators allow for analysis of operations for the mixed data flow; and converting the model into an execution plan graph, wherein the execution plan graph is executable on different runtime environments.