Oracle中很多SQL操作都会使用Temp Space临时空间，理想状况下OLTP环境中自动/手动管理的PGA总是能在私有内存中满足这些操作的空间需求，而在Data Warehouse数据仓库中往往我们需要配置一个巨大的临时表空间(组)来满足海量的维护/查询对临时空间的需求，那么到底有哪些SQL操作时需要用到临时空间的呢？Google了一下，似乎没有一张非常完整的列表，这里由我抛砖引玉地列出一些，当然这远远不够全面:
| SQL CODE |
Type |
| CREATE INDEX |
DDL |
| REBUILD INDEX |
DDL |
| ANALYZE |
DDL |
| CREATE PRIMARY KEY CONSTRAINT |
DDL |
| ENABLE CONSTRAINT |
DDL |
| CREATE TABLE AS SELECT(use permanet TBS) |
DDL |
| SELECT DISTINCT |
QUERY |
| ORDER BY |
Clause |
| GROUP BY |
Clause |
| UNION ALL |
Clause |
| UNION |
Clause |
| MINUS |
Clause |
| INTERSECT |
Clause |
| ROLLUP() FUNCTION |
FUNCTION |
| RANK() FUNCTION |
FUNCTION |
| CONNECT BY |
Clause |
| TEMPORARY TABLE |
Temporary Data |
| LOB_DATA |
LOB |
| LOB_INDEX |
LOB |
| HASH GROUP BY |
Operation |
| HASH JOIN |
Operation |
| HASH JOIN (ANTI) |
Operation |
| HASH JOIN (SEMI) |
Operation |
| SORT MERGE JOIN |
Operation |
| SORT MERGE Anti-Join |
Operation |
| SORT MERGE Semi-Join |
Operation |
| SORT GROUP BY |
Operation |
| IDX MAINTENANCE (SORT) |
Operation |
| WINDOW (SORT) |
Operation |
| ROLLUP (SORT) |
Operation |
| CONNECT-BY (SORT) |
Operation |
| UNION |
Operation |
| UNION ALL |
Operation |
| SORT AGGREGATE |
Operation |
| SORT UNIQUE |
Operation |