sys.obj$ 表是oracle 数据库字典表中的对象基础表，所有对象都在该表中有记录，其中type#字段表明对象类型，比如有一个表 test ，则该对象在sys.obj$ 中存在一条记录，name列为test， type#列为2，表示该对象是一个表。
该列的其他数值含义如下表所示，以供参考。
| 值 | 解释 |
| 0 | next object |
| 1 | index |
| 2 | table |
| 3 | cluster |
| 4 | view |
| 5 | synonym |
| 6 | sequence |
| 7 | procedure |
| 8 | function |
| 9 | package |
| 11 | package body |
| 12 | trigger |
| 13 | type |
| 14 | type body |
| 19 | table partition |
| 20 | index partition |
| 21 | lob |
| 22 | library |
| 23 | directory |
| 24 | queue |
| 28 | java source |
| 29 | java class |
| 30 | java resource |
| 32 | indextype |
| 33 | operator |
| 34 | table subpartition |
| 35 | index subpartition |
| 40 | lob partition |
| 41 | lob subpartition |
| 43 | dimension |
| 44 | context |
| 46 | rule set |
| 47 | resource plan |
| 48 | consumer group |
| 51 | subscription |
| 52 | location |
| 55 | xml schema |
| 56 | java data |
| 57 | edition |
| 59 | rule |
| 60 | capture |
| 61 | apply |
| 62 | evaluation context |
| 66 | job |
| 67 | program |
| 68 | job class |
| 69 | windows |
| 72 | scheduler group |
| 74 | schedule |
| 79 | chain |
| 81 | file group |
| 82 | mining model |
| 90 | credential |
| 92 | cube dimension |
| 93 | cube |
| 94 | measure folder |
| 95 | cube build process |
| 100 | file watcher |
| 101 | destination |