Execution of multiple queries over a plurality of sequential operator execution steps

A node of a database system comprising:

• at least one processor, and
• memory that stores executable instructions that, when executed by the at least one processor, cause the node to:
• determine a plurality of queries for execution by the node;
• determine a plurality of query operator execution flows for execution of the plurality of queries, wherein each query operator execution flow of the plurality of query operator execution flows includes a plurality of operators for execution of one of the plurality of queries corresponding to the each query operator execution flow;
• facilitate execution of the plurality of queries by performing a plurality of sequential operator execution steps, wherein each of the plurality of sequential operator execution steps includes:
• selecting one of the plurality of queries for execution at the each of the plurality of sequential operator execution steps;
• selecting one of the plurality of operators of the one of the plurality of query operator execution flows corresponding to the one of the plurality of queries based on identifying one of the plurality of operators of the one of the plurality of query operator execution flows with a corresponding most favorable one of a plurality of priority values;
• facilitating execution of the one of the plurality of operators on a queued set of data blocks of the one of the plurality of operators to generate at least one output data block;
• advancing to a next one of the plurality of sequential operator execution steps.

A non-transitory computer readable storage medium comprises:

• at least one memory section that stores operational instructions that, when executed by a processing module that includes a processor and a memory, causes the processing module to:
• determine a plurality of queries for execution;
• determine a plurality of query operator execution flows for execution of the plurality of queries, wherein each query operator execution flow of the plurality of query operator execution flows includes a plurality of operators for execution of one of the plurality of queries corresponding to the each query operator execution flow;
• facilitate execution of the plurality of queries by performing a plurality of sequential operator execution steps, wherein each of the plurality of sequential operator execution steps includes:
• selecting one of the plurality of queries for execution at the each of the plurality of sequential operator execution steps;
• selecting one of the plurality of operators of the one of the plurality of query operator execution flows corresponding to the one of the plurality of queries based on identifying one of the plurality of operators of the one of the plurality of query operator execution flows with a corresponding most favorable one of a plurality of priority values;
• facilitating execution of the one of the plurality of operators on a queued set of data blocks of the one of the plurality of operators to generate at least one output data block;
• advancing to a next one of the plurality of sequential operator execution steps.