query processing of intermediate result sets • Manages two-phase commit • Stores global catalog information Postgres Conference China 2016 中国用户大会 Data Nodes • Stores tables and indexes • Only coordinators Postgres Conference China 2016 中国用户大会 Postgres-XL Technology • Users connect to any Coordinator Postgres Conference China 2016 中国用户大会 Postgres-XL Technology • Data is automatically spread across cluster Conference China 2016 中国用户大会 Postgres-XL Technology • Queries return back data from all nodes in parallel Postgres Conference China 2016 中国用户大会 Postgres-XL Technology • GTM maintains a consistent view of

.............................................................................. iii 4. Further Information............................................................................................... .............................................................................180 9.19. System Information Functions ....................................................................................181 .......364 27.3.2. Retrieving Query Result Information .............................................................370 27.3.3. Retrieving Result Information for Other Commands .......................

...............................................................................iii 4. Further Information............................................................................................... .............................................................................170 9.19. System Information Functions .............................................................................171 9.20 ..........342 27.3.2. Retrieving Query Result Information ......................................................348 27.3.3. Retrieving Result Information for Other Commands ...........................

................................................................................lv 4. Further Information............................................................................................... .............................................................................248 9.23. System Information Functions ....................................................................................251 .......571 30.3.2. Retrieving Query Result Information .............................................................578 30.3.3. Retrieving Result Information for Other Commands .......................

.................................................................................l 4. Further Information............................................................................................... .............................................................................234 9.23. System Information Functions .............................................................................236 vii ..........538 30.3.2. Retrieving Query Result Information ......................................................544 30.3.3. Retrieving Result Information for Other Commands ...........................

................................................................................xl 4. Further Information............................................................................................... .............................................................................192 9.19. System Information Functions ....................................................................................193 .......399 28.3.2. Retrieving Query Result Information .............................................................405 28.3.3. Retrieving Result Information for Other Commands .......................

........................................................................... xxxvii 4. Further Information............................................................................................... .............................................................................192 9.19. System Information Functions ....................................................................................193 .......397 28.3.2. Retrieving Query Result Information .............................................................403 28.3.3. Retrieving Result Information for Other Commands .......................

............................................................................. xlix 4. Further Information............................................................................................... .............................................................................320 9.25. System Information Functions ....................................................................................324 ....748 31.3.2. Retrieving Query Result Information .............................................................756 31.3.3. Retrieving Other Result Information .......................................

...............................................................................xlv 4. Further Information............................................................................................... .............................................................................303 9.25. System Information Functions .............................................................................306 9.26 .......708 31.3.2. Retrieving Query Result Information ......................................................715 31.3.3. Retrieving Other Result Information ...........................................

.............................................................................. lix 4. Further Information............................................................................................... .............................................................................257 9.23. System Information Functions ....................................................................................259 ....607 31.3.2. Retrieving Query Result Information .............................................................614 31.3.3. Retrieving Other Result Information .......................................