quote
select * from syscat.indexes where tabname = 'T_CHECKLIMIT'
select * from syscat.indexes where tabname = 'T_CHECKLIMIT' and indname = 'SQL171113120118780'
columns can see which columns make up this index +YWTAG+CHECKSTH
uniquerule means yes Not pk P
ownertype means it is the only U
http://blog.csdn.net/db2china/article/details/17310159
http://blog.csdn.net/TUBER727/article/details/12564309