修改liquibase的使用方法

liquibase-use.md

@@ -55,11 +55,100 @@ Liquibase 使用手册
 
 > TL 表均为联合主键，没有自增长、sequence 等  
 
+参考示例： 
+在groovy中创建一张表 
+```groovy
+import com.hand.hap.liquibase.MigrationHelper
+
+def mhi = MigrationHelper.getInstance()
+databaseChangeLog(logicalFilePath: "2016-09-26-init-migration.groovy") {
+
+
+    changeSet(author: "作者名", id: "日期-作者-表名") {
+        createTable(tableName: "HR_EMPLOYEE") {
+            column(autoIncrement: "true", startWith: "10001", name: "EMPLOYEE_ID", type: "BIGINT", remarks: "员工ID") {
+                constraints(nullable: "false", primaryKey: "true", primaryKeyName: "HR_EMPLOYEE_PK")
+            }
+            column(name: "EMPLOYEE_CODE", remarks: "员工编码", type: "VARCHAR(30)") {
+                constraints(nullable: "false", unique: "true", uniqueConstraintName: "HR_EMPLOYEE_U1")
+            }
+            column(name: "NAME", remarks: "员工姓名", type: "VARCHAR(50)") { constraints(nullable: "false") }
+            column(name: "BORN_DATE", remarks: "出生日期", type: "DATE")
+            column(name: "EMAIL", remarks: "电子邮件", type: "VARCHAR(50)")
+            column(name: "MOBIL", remarks: "移动电话", type: "VARCHAR(50)")
+            column(name: "JOIN_DATE", remarks: "入职日期", type: "DATE")
+            column(name: "GENDER", remarks: "性别", type: "VARCHAR(1)")
+            column(name: "CERTIFICATE_ID", remarks: "ID", type: "VARCHAR(100)") {
+                constraints(nullable: "false", unique: "true", uniqueConstraintName: "HR_EMPLOYEE_U2")
+            }
+            column(name: "STATUS", remarks: "状态", type: "VARCHAR(50)") { constraints(nullable: "false") }
+            column(name: "ENABLED_FLAG", remarks: "启用状态", type: "VARCHAR(1)", defaultValue: "Y") {
+                constraints(nullable: "false")
+            }
+            column(name: "OBJECT_VERSION_NUMBER", type: "BIGINT", defaultValue: "1")
+            column(name: "REQUEST_ID", type: "BIGINT", defaultValue: "-1")
+            column(name: "PROGRAM_ID", type: "BIGINT", defaultValue: "-1")
+            column(name: "CREATED_BY", type: "BIGINT", defaultValue: "-1")
+            column(name: "CREATION_DATE", type: "DATETIME", defaultValueComputed: "CURRENT_TIMESTAMP")
+            column(name: "LAST_UPDATED_BY", type: "BIGINT", defaultValue: "-1")
+            column(name: "LAST_UPDATE_DATE", type: "DATETIME", defaultValueComputed: "CURRENT_TIMESTAMP")
+            column(name: "LAST_UPDATE_LOGIN", type: "BIGINT", defaultValue: "-1")
+        }
+    }
+}
+```
+
 **请注意保持脚本格式工整**
 
 ## 修改表结构
 
 也是通过添加 changeSet, 顺序添加  
+修改表结构参考示例：  
+```groovy
+package com.hand.hap.db
+
+import com.hand.hap.liquibase.MigrationHelper
+
+def mhi = MigrationHelper.getInstance()
+dbType = MigrationHelper.getInstance().dbType()
+databaseChangeLog(logicalFilePath: "patch.groovy") {
+    changeSet(author: "作者", id: "日期-作者-编号") {
+        /**
+         * 新增一列
+         */
+        addColumn(tableName: "SYS_USER") {
+            column(name: "LAST_LOGIN_DATE", type: "datetime", remarks: "最后一次登录时间")
+        }
+        /**
+         * 修改列名
+         */
+        renameColumn(tableName: "SYS_IF_CONFIG_LINE_TL", columnDataType: "VARCHAR(255)", oldColumnName: "HEADER_ID", newColumnName: "LINE_ID")
+        /**
+         * 添加唯一约束
+         */
+        addUniqueConstraint(tableName: "SYS_IF_CONFIG_HEADER_B", columnNames: "INTERFACE_CODE", constraintName: "SYS_IF_CONFIG_HEADER_U1")
+        /**
+         * 添加默认值
+         */
+        addDefaultValue(tableName: "SYS_USER", columnName: "FIRST_LOGIN", columnDataType: "varchar", defaultValue: "Y")
+
+        /**
+         * 添加索引
+         */
+        createIndex(tableName: "SYS_RESOURCE_B", indexName: "SYS_RESOURCE_B_N1") {
+            column(name: "TYPE", type: "varchar(15)")
+        }
+
+        /**
+         * 可以使用groovy语句进行条件判断
+         * 修改数据类型
+         */
+        if (true) {
+            modifyDataType(tableName: "FND_COMPANY_B", columnName: "COMPANY_FULL_NAME", newDataType: "varchar(250)")
+        }
+    }
+}
+```
 
 ## 初始数据
 
@@ -135,6 +224,6 @@ patch.groovy 中即可以写 liquibase 命令, 也可以执行 sql 语句.
 编写完毕以后，将补丁配置到 patch.groovy 中。
 
 > 补丁将会是用的比较多的方式，主要是增加新的数据，由于主键是手动指定的，请注意不要与他人的重复，必须在本地测试过之后再commit。  
-
+*补丁数据的脚本编写可参考修改数据库的脚本*