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package sf.database.annotations;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* 列扩展信息:
* 1.给出字段的更加精确的数据库类型描述
* 2. 逻辑删除标记,如果有此标记,那么内置删除语句deleteById 将变成update语句,并设置属性为的值
* 此注解仅用于在logicDeleteXXX内置操作中使用update方式,此注解不影响任何查询语句
*/
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.FIELD, ElementType.METHOD})
@Documented
public @interface ColumnInfo {
/**
* 是否为无符号数值,默认为false
*/
boolean unsigned() default false;
/**
* 默认值,直接添加到 default 后面
* @return
*/
String defaultVale() default "";
/**
* 是否是逻辑删除字段
* @return
*/
boolean logicDelete() default false;
/**
* 逻辑删除的值
*/
String logicDeletedValue() default "";
/**
* 未删除的值
* @return
*/
String NotLogicDeletedValue() default "";
}
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