标签:null where bsp class rdb firebird HERE fir span
1、修改为非空
UPDATE RDB$RELATION_FIELDS SET RDB$NULL_FLAG = 1
WHERE RDB$FIELD_NAME = ‘C1‘ AND RDB$RELATION_NAME = ‘T1‘;
2、修改为可空
UPDATE RDB$RELATION_FIELDS SET RDB$NULL_FLAG = NULL
WHERE RDB$FIELD_NAME = ‘C1‘ AND RDB$RELATION_NAME = ‘T1‘;
T1 = 表名
C1 = 列名
note:若改为非空,修改完要保证列数据不能有空值。
标签:null where bsp class rdb firebird HERE fir span
原文地址:https://www.cnblogs.com/jonney-wang/p/9689447.html