private void StartReset(DbConnectionDO conn, string dbname, string tablename, int startNum)
{
msgForm.IsWorking = true;
string conn_str = "server=" + conn.HOST + ";port=" + conn.PORT + ";user="******";password="******"; database=" + dbname + ";";
msgForm.ClearText();
msgForm.SetText("正在查询数据记录相关信息");
MySqlDbHelper dbhelper = new MySqlDbHelper(conn_str);
string sql = "select max(id) from " + tablename;
object v = dbhelper.GetFirstValue(sql);
int maxId = 0;
if (v != null)
{
maxId = Convert.ToInt32(v);
}
if (maxId <= 0 || maxId < startNum)
{
MessageBox.Show("表起始值无效！");
return;
}
CommittableTransaction trans = new CommittableTransaction(TimeSpan.FromMinutes(120));
sql = "select count(*) from " + tablename;
v = dbhelper.GetFirstValue(sql);
int count = Convert.ToInt32(v);
msgForm.SetText(tablename + "表找到" + count + "条数据，最大ID=" + maxId + (count > 10000 ? "，开始分批执行" : ""));
int currentId = 0;
List <string> sb_updateid = new List <string>();
int pcount = 10000;
int execCount = 0;
if (count > pcount)
{
while (true)
{
int currentStartNum = 0;
int currentExecCount = 0;
string ss1 = "";
sql = "select id from " + tablename + " where id > " + currentId + " order by id asc limit " + pcount + ";";
currentId = ExecResetId(dbhelper, sql, tablename, startNum, trans,
out currentStartNum, out ss1, out currentExecCount);
if (currentId <= 0)
{
break;
}
startNum = currentStartNum;
execCount += currentExecCount;
sb_updateid.Add(ss1);
msgForm.SetText("执行到ID=" + currentId + "，剩" + (count - execCount));
}
}
else
{
sql = "select id from " + tablename + " order by id asc";
int currStartNum;
string ss1 = "";
ExecResetId(dbhelper, sql, tablename, startNum, trans, out currStartNum, out ss1, out execCount);
sb_updateid.Add(ss1);
}
msgForm.SetText("执行最后的ID更新");
int index = 0;
foreach (string s in sb_updateid)
{
msgForm.SetText("执行更新第" + (index + 1) + "批，剩" + (sb_updateid.Count - index - 1));
new MySqlDbHelper(dbhelper.ConnectionString).RunSql(s, null, null, trans);
index++;
}
trans.Commit();
msgForm.SetText("执行完成");
msgForm.IsWorking = false;
}
private void CompareDbSchemaField(DbConnectionDO source_conn, string source_db, DbConnectionDO target_conn, string target_db)
{
msgForm.IsWorking = true;
//1、获取表列表
InitTableList();
List <string> targetFound = new List <string>(); //目标表中已经找到的表名称
if (sourceDbs.Count > 0)
{
CommittableTransaction trans = new CommittableTransaction();
for (int i = 0; i < sourceDbs.Count; i++)
{
string sd = sourceDbs[i];
mainForm.SetTitle("比较" + sd);
msgForm.SetText("比较" + sd);
int process = Convert.ToInt32((i + 1) * 100 / sourceDbs.Count * 0.8);
mainForm.SetProcessBar(10 + process);
string sql_s = "show columns from `" + sd + "`";
DataTable dt_s = new MySqlDbHelper(conn_source_str).RunDataTableSql(sql_s);
List <string> fields_s = new List <string>();
if (dt_s != null && dt_s.Rows.Count > 0)
{
if (targetDbs.IndexOf(sd) > -1)
{
DataTable dt_t = new MySqlDbHelper(conn_target_str).RunDataTableSql(sql_s);
CompareTable(dt_s, dt_t, sd);
targetFound.Add(sd);
}
else
{
CreateTable(dt_s, sd);
}
}
}
}
mainForm.SetTitle("删除多余表...");
msgForm.SetText("删除多余表...");
//在source没有，但是target有的要删除
if (targetDbs != null && targetDbs.Count > 0 && targetFound.Count > 0)
{
foreach (string table in targetDbs)
{
if (targetFound.IndexOf(table) < 0)
{
sb.AppendLine("DROP TABLE " + table + ";");
}
}
}
if (sb.ToString() != "")
{
mainForm.SetProcessBar(95);
mainForm.SetTitle("写入文件...");
msgForm.SetText("写入文件...");
string dir = AppDomain.CurrentDomain.BaseDirectory + "\\sql";
if (!Directory.Exists(dir))
{
Directory.CreateDirectory(dir);
}
string file = dir + "\\sql_" + DateTime.Now.ToString("yyyyMMdd") + ".sql";
File.WriteAllText(file, sb.ToString());
mainForm.SetProcessBar(100);
MessageBox.Show("操作成功，点击确定打开文件！", "恭喜", MessageBoxButtons.OK);
Process.Start(file);
mainForm.SetTitle("");
mainForm.SetProcessBar(0);
}
else
{
mainForm.SetProcessBar(100);
MessageBox.Show("很好， 两边数据库结构无差异！");
}
msgForm.SetText("完成");
msgForm.IsWorking = false;
}