public void BeginCompare(DbConnectionDO source_conn, string source_db, DbConnectionDO target_conn, string target_db)
{
if (msgForm.IsWorking)
{
MessageBox.Show("前一个任务还没有执行完成，请等待！");
return;
}
conn_source_str = "server=" + source_conn.HOST + ";port=" + source_conn.PORT + ";user="******";password="******"; database=" + source_db + ";";
conn_target_str = "server=" + target_conn.HOST + ";port=" + target_conn.PORT + ";user="******";password="******"; database=" + target_db + ";";
msgForm.ClearText();
CompareDbSchemaField(source_conn, source_db, target_conn, target_db);
}
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;
}