MySql开发之自动同步表结构

show table from rd_db;
show create table added_table_name;

select 
 COLUMN_NAME,COLUMN_TYPE,IS_NULLABLE,COLUMN_DEFAULT,COLUMN_COMMENT,EXTRA 
from 
 infORMation_schema.columns
where 
  TABLE_SCHEMA='rd_db'
  and TABLE_NAME = 'rd_table';

        for (Column column : sourceTable.getColumns().values()) {
            if (targetTable.getColumns().get(column.getName()) == null) {
                // 如果对应的target没有这个字段,直接alter
                String sql = "alter table " + target.getSchema() + "." + targetTable.getTableName() + " add " + column
                        .getName() + " ";
                sql += column.getType() + " ";
                if (column.getIsNull().equals("NO")) {
                    sql += "NOT NULL ";
                } else {
                    sql += "NULL ";
                }
                if (column.getDefaultValue() != null) {
                    sql += "DEFAULT " + SqlUtil.getDbString(column.getDefaultValue()) + " ";
                }
                if (column.getComment() != null) {
                    sql += "COMMENT " + SqlUtil.getDbString(column.getComment()) + " ";
                }
                if (after != null) {
                    sql += "after " + after;
                }
                changeSql.add(sql+";");
            } else {
                // 检查对应的source 和 target的属性
                String sql =
                        "alter table " + target.getSchema() + "." + targetTable.getTableName() + " change " + column
                                .getName() + " ";
                Column sourceColumn = column;
                Column targetColumn = targetTable.getColumns().get(sourceColumn.getName());
                // 比较两者字段,如果返回null,表明一致
                String sqlExtend = compareSingleColumn(sourceColumn, targetColumn);
                if (sqlExtend != null) {
                    changeSql.add(sql + sqlExtend+";");
                }
            }
            after = column.getName();
        }

sourceHost=127.0.0.1:3306
sourceUser=root
sourcePass=123123123
sourceSchema=mystique_db
sourceCharset=utf8

targetHost=127.0.0.1:3306
targetUser=root
targetPass=123123123
targetSchema=mystique_test
targetCharset=utf8

autoExecute=YES //此处表明自动同步

alchemystar.runner.shellRunner 

alter table mystique_test.t_test_3 change id id bigint(20) NOT NULL AUTO_INCREMENT COMMENT ''
alter table mystique_test.t_test_3 add index (name)
alter table mystique_test.t_test_3 drop index name_id
alter table mystique_test.t_test_3 add id_2 varchar(50) NULL DEFAULT '' COMMENT '' after name