The BTYPE column identifies the object type: 'T' for table, 'I' for index, and 'F' for function instance.

BTYPE 列显示对象类型：'T' 表示表，'I' 表示索引，'F' 表示函数实例。

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Syscat.tabconst Contains a row for each unique (u), primary key (p), foreign key (f), or table check (k) constraint db2 select constname, tabname, type from syscat.tabconst.

tabconst为每个唯一性(U)、主键(p)、外键(f)或者表检查(K)约束保持一个行db2 select constname, tabname, type from syscat . tabconst。

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