Specifies a validation check for a field. Oracle Rdb evaluates the
conditional expression at run time when the field is stored or
modified.
(B)0[mvalidity-clause =
qwq> [4mVALID[m [4mIF[m qqq> conditional-expr qwq>
mq> [4mNO[m [4mVALID[m [4mIF[m qqqqqqqqqqqqqqqqqqqqj
conditional-expr Specifies a valid conditional expression. This
conditional expression must refer only to the
field being defined. Ask for HELP on Cond_
expr for a complete description of Oracle Rdb
conditional expressions.
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