如何获取Sybase中所有表的主键

Question

我需要从sybase ase数据库中的所有用户表创建数据字典。我不能安装像赛贝斯PowerDesigner这样的工具，所以我必须使用SQL查询来实现。

我在论坛的帮助下组成了这个查询，以显示表名、列名、数据类型、大小而不是空约束。但是我无法找到该列是否是主键，或者是否是聚集主键的一部分。

    SELECT O.name as "Table",
            C.name as "Column", 
            C.length as "Length",
            T.name as "Datatype",
            C.status as "Allow Null",
            CASE C.status
                WHEN 8 THEN 'NULL' 
                WHEN 0 THEN 'NOT NULL' 
            END as "NULLS"
FROM        sysobjects O,              
            syscolumns C,
            systypes T
WHERE     O.id = C.id
AND       O.type = "U"             -- user tables only
AND       C.usertype = T.usertype 
ORDER BY  O.name, C.colid

这里有人可以帮助我对所需的表进行必要的连接，以获得指示其主键状态的所需标志吗。我已经阅读了syskey和sysindexes表文档，但无法找到哪个状态对我的目的有益。

Answer 1

请尝试以下代码:

    SELECT O.name as "Table",
            C.name as "Column", 
            C.length as "Length",
            T.name as "Datatype",
            C.status as "Allow Null",
            CASE C.status
                WHEN 8 THEN 'NULL' 
                WHEN 0 THEN 'NOT NULL' 
            END as "NULLS",
            ISNULL((select "Y" as PK_FLAG from syskeys K where O.id=K.id
            and K.type = 1 and (C.colid =K.key1 or C.colid =K.key2 OR C.colid =K.key3  OR C.colid =K.key4 OR C.colid =K.key5 OR C.colid =K.key6 OR C.colid =K.key7 Or C.colid =K.key8 )),"N") as Primary_Key_Flag
FROM        sysobjects O,              
            syscolumns C,
            systypes T
WHERE     O.id = C.id
AND       O.type = "U"             -- user tables only
AND       C.usertype = T.usertype 
ORDER BY  O.name, C.colid