Defining the same primary key twice on a table actually attempts to create two
constraints.
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Key: DERBY-991
URL: http://issues.apache.org/jira/browse/DERBY-991
Project: Derby
Type: Bug
Versions: 10.2.0.0
Reporter: Daniel John Debrunner
Priority: Minor
Defining the same primary key twice on a table actually attempts to create two
constraints.
ij> create table t ( i int, b int, primary key (i,b), primary key (i,b));
ERROR 42Z93: Constraints 'SQL060215062628851' and 'SQL060215062628850' have the
same set of columns, which is not allowed.
ij> create table t ( i int primary key primary key primary key);
ERROR 42Z93: Constraints 'SQL060214082337951' and 'SQL060214082337950' have the
same set of columns, which is not allowed.
Other combinations of two primary keys (that I could think of) return the
correct error.
ij> create table t ( i int, b int, primary key (i,b), primary key (b));
ERROR 42X90: More than one primary key constraint specified for table 'T'.
ij> create table t ( i int primary key, b int primary key);
ERROR 42X90: More than one primary key constraint specified for table 'T'.
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