How do I find the definition of a named constraint in Oracle?

Question

All I know about the constraint is it\'s name (SYS_C003415), but I want to see it\'s definition.

Answer 1

Use following query to get a definition of constraint in oracle:

Select DBMS_METADATA.GET_DDL('CONSTRAINT', 'CONSTRAINT_NAME') from dual

Answer 2

Or to see all constaints use SYS.DBA_CONSTRAINTS (If you have the privileges)

Answer 3

Looks like I should be querying ALL_CONSTRAINTS.

select OWNER, CONSTRAINT_NAME, CONSTRAINT_TYPE, TABLE_NAME, SEARCH_CONDITION from ALL_CONSTRAINTS where CONSTRAINT_NAME = 'SYS_C003415';

Answer 4

Another option would be to reverse engineer the DDL...

DBMS_METADATA.GET_DDL('CONSTRAINT', 'SYS_C003415')

Some examples here....

http://www.psoug.org/reference/dbms_metadata.html