| 摘要 |
One method includes receiving a database query, receiving information about a data source (102) such as a database table (324a, 324b, 324c) in data storage populated with data elements, producing a structural representation (334) of the database table that includes a formatted data organization reflective of the database table and is absent the data elements of the database table, and providing the structural representation and the database query to a plan generator (318) capable of producing a query plan (314). Another method includes receiving a query plan (314) from a plan generator (318), the plan representing operations for executing a database query on a data source (102) such as a database table (324a, 324b, 324c), and producing a dataflow graph (312) from the query plan. WO 2011/088293 3/8 PCT/US2011/021260 324b 324c 324a 300 320 l Database ___ 328 312 338 SELECT * |e| Generation30 Engine 310Grp -Execution 334 314 Engine SELECT * 304 FIG. 3 Query Plan Generator |
