达梦表字段、字段类型，精度比对及更改字段SQL生成： 1. 依赖 ```xml com.dameng DmJdbcDriver18 8.1.3.62 cn.hutool hutool-all 5.7.0 ``` 2. 数据库配置文件参考 url = jdbc:dm://xxxx:xxxx?schema=xxx&zeroDateTimeBehavior=convertToNull&useUnicode=true&characterEncoding=utf-8 username = SYSDBA password = SYSDBA 3. Java代码 ```java package com.lhq.datacontrast; import cn.hutool.db.Db; import cn.hutool.db.DbUtil; import cn.hutool.db.Entity; import cn.hutool.db.ds.DSFactory; import cn.hutool.setting.Setting; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import javax.sql.DataSource; import java.sql.Connection; import java.sql.SQLException; import java.util.*; @SpringBootApplication public class DataContrastApplication { public static void main(String[] args) throws SQLException { Setting prodSetting = new Setting("classpath: config/prod.setting"); DataSource prodDs = DSFactory.create(prodSetting).getDataSource(); Setting devSetting = new Setting("classpath: config/dev.setting"); DataSource devDs = DSFactory.create(devSetting).getDataSource(); List devTable = Db.use(devDs).query("select Table_Name from SYS.ALL_TABLES where OWNER = 'HEALTH_RECORDS'"); List prodTable = Db.use(prodDs).query("select Table_Name from SYS.ALL_TABLES where OWNER = 'HZJJK_JBGW'"); List names = new ArrayList<>(); for (Entity table : prodTable) { names.add(table.getStr("table_name")); } for (Entity entity : devTable) { if(entity.getStr("table_name").startsWith("GW_")){ String tableName = entity.getStr("table_name").replace("GW_",""); if(names.contains( tableName)) { contrastTable(prodDs, devDs, entity.getStr("table_name").replace("GW_", ""), entity.getStr("table_name")); } } } } private static void contrastTable(DataSource prodDs, DataSource devDs, String progTable, String devTable) throws SQLException { List devResult = Db.use(devDs).query("\n" + "select * from all_tab_columns where Table_Name=? and OWNER = 'HEALTH_RECORDS';", devTable); List progResult = Db.use(prodDs).query("\n" + "select * from all_tab_columns where Table_Name=? and OWNER = 'HZJJK_JBGW';", progTable); Map progMap = new HashMap<>(); for (Entity entity : progResult) { progMap.put(entity.getStr("column_name"), entity); } Map devMap = new HashMap<>(); for (Entity entity : devResult) { devMap.put(entity.getStr("column_name"), entity); } for (String s : progMap.keySet()) { if (devMap.containsKey(s)){ if ( progMap.get(s).getStr("data_length").equals(devMap.get(s).getStr("data_length")) ) { // 长度相同 if(progMap.get(s).getStr("data_type").equals(devMap.get(s).getStr("data_type")) || (Objects.equals(progMap.get(s).getStr("data_type"), "VARCHAR") && Objects.equals(devMap.get(s).getStr("data_type"), "VARCHAR2")) || (Objects.equals(progMap.get(s).getStr("data_type"), "VARCHAR2") && Objects.equals(devMap.get(s).getStr("data_type"), "VARCHAR"))){ continue; }else{ Entity entity = progMap.get(s); System.out.println(String.format("字段名：%s，数据类型不一致，prod:%s->%s->%s,dev:%s->%s->%s", s, progTable, progMap.get(s).getStr("data_type"), progMap.get(s).getStr("data_length"), devTable, devMap.get(s).getStr("data_type"), devMap.get(s).getStr("data_length"))); System.out.println(String.format("ALTER TABLE \"%s\".\"%s\" MODIFY \"%s\" %s(%s);", "HEALTH_RECORDS", devTable,s,entity.getStr("data_type"),entity.getStr("data_length")) ); } } else { if(progMap.get(s).getStr("data_type").equals(devMap.get(s).getStr("data_type"))){ // Entity entity = progMap.get(s); // System.out.println(String.format("字段名：%s，数据长度不一致，prod:%s->%s->%s,dev:%s->%s->%s", // s, progTable, // progMap.get(s).getStr("data_type"), progMap.get(s).getStr("data_length"), // devTable, // devMap.get(s).getStr("data_type"), devMap.get(s).getStr("data_length"))); // System.out.println(String.format("ALTER TABLE \"%s\".\"%s\" MODIFY \"%s\" %s(%s);", "HEALTH_RECORDS", // devTable,s,entity.getStr("data_type"),entity.getStr("data_length")) ); // System.out.println("commit "); }else{ Entity entity = progMap.get(s); System.out.println(String.format("字段名：%s，数据长度不一致,类型也不一致，prod:%s->%s->%s,dev:%s->%s->%s", s, progTable, progMap.get(s).getStr("data_type"), progMap.get(s).getStr("data_length"), devTable, devMap.get(s).getStr("data_type"), devMap.get(s).getStr("data_length"))); System.out.println(String.format("ALTER TABLE \"%s\".\"%s\" MODIFY \"%s\" %s(%s);", "HEALTH_RECORDS", devTable,s,entity.getStr("data_type"),entity.getStr("data_length")) ); } } }else{ Entity entity = progMap.get(s); System.out.println(String.format("字段名：%s 在表\"%s\"中不存在", s, devTable)); System.out.println(String.format("ALTER TABLE \"%s\".\"%s\" ADD %s %s(%s);","HEALTH_RECORDS", devTable,s,entity.getStr("data_type"),entity.getStr("data_length")) ); System.out.println(String.format("COMMENT ON COLUMN \"%s\".\"%s\".\"%s\" IS '%s';","HEALTH_RECORDS",devTable,s, getComments(prodDs, progTable,s)) ); System.out.println("commit;\n"); } } } private static String getComments(DataSource ds, String table, String s) throws SQLException { List query = Db.use(ds).query("select COMMENTS from all_col_comments where " + "OWNER='目标库' and TABLE_NAME =? and COLUMN_NAME = ?;", table, s); if(query.size() == 0 ){ return null; } return query.get(0).getStr("COMMENTS"); } } ```