DB2数据库:
索引字典表:SYSCAT.INDEXES
索引类型字段:UNIQUERULE
索引类型字段可能值:
D = means duplicate allowed
P = means primary index
U = means unique index
Oracle数据库:
索引字典表:user_indexes
索引类型字段:UNIQUENESS
索引类型字段可能值:
UNIQUE = 唯一索引
NONUNIQUE = 非唯一索引