Syscat.checks Contains a row for each table check constraint db2 select constname, tabname, text from syscat.checks.

checks为每个表检查约束保持一个行db2 select constname, tabname, text from syscat . checks。

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Syscat.constdep Contains a row for each dependency of a constraint on some other object db2 select constname, tabname, btype, bname from syscat.constdep.

constdep为其他对象上约束的每个依赖项保持一个行db2 select constname, tabname, btype, bname from syscat . constdep。

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SYSCAT.COLCHECKS Contains a row for each column that is referenced by a table check constraint db2 select constname, tabname, colname, usage from syscat.colchecks

COLCHECKS 为表检查约束所引用的每个列保持一个行 db2 select constname, tabname, colname, usage from syscat.colchecks

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