PanguSync大数据量初始化脚本

由于数据库增量同步软件PanguSync初始化最大超时时间为200s,如果数据量很大，初次部署时可能会超时，可以先停止任务，使用以下Sql语句进行初始化，以下语句可以分步执行，初始化完成后，后续无需再执行耗时的初始化。

Sqlserver

源操作：

1.创建字段
alter table 表名 Add C_PanguSyncSourceTimestamp datetime2(6) not null default sysdatetime()

2.设置初始化分批时间
WITH NumberedRows AS (    
    SELECT    
        C_PanguSyncSourceTimestamp ,    
        ROW_NUMBER() OVER (ORDER BY [主键] desc) AS RowNum    
    FROM    
        表名  
)    
UPDATE Nr    
SET Nr.C_PanguSyncSourceTimestamp  = DATEADD(MILLISECOND, -Nr.RowNum, SYSDATETIME())    
FROM    
    NumberedRows Nr;

3.创建索引
CREATE INDEX  I_PanguSyncSourceTimestamp  on 表名(C_PanguSyncSourceTimestamp ) WITH (ONLINE = ON)
--------------------------------------------------------------------------------------------------------
目标操作：

1.创建字段
alter table 表名 Add C_PanguSyncTargetTimestamp datetime2(6) not null default '2000-01-01 00:00:00.000000'

2.设置初始化分批时间

如果存在C_PanguSyncSourceTimestamp字段：

WITH NumberedRows AS (    
    SELECT    
        C_PanguSyncTargetTimestamp,
        C_PanguSyncSourceTimestamp ,
        ROW_NUMBER() OVER (ORDER BY (select NULL)) AS RowNum    
    FROM    
        表名 
)    
UPDATE Nr    
SET Nr.C_PanguSyncSourceTimestamp =Nr.C_PanguSyncSourceTimestamp ,Nr.C_PanguSyncTargetTimestamp = DATEADD(MILLISECOND, -Nr.RowNum, CAST('2000-01-01 00:00:00.000' AS DATETIME))    
FROM    
    NumberedRows Nr;

如果不存在C_PanguSyncSourceTimestamp字段：

WITH NumberedRows AS (    
    SELECT    
        C_PanguSyncTargetTimestamp,    
        ROW_NUMBER() OVER (ORDER BY (select NULL)) AS RowNum    
    FROM    
        表名   
)    
UPDATE Nr    
SET Nr.C_PanguSyncTargetTimestamp = DATEADD(MILLISECOND, -Nr.RowNum, CAST('2000-01-01 00:00:00.000' AS DATETIME))    
FROM    
    NumberedRows Nr;

3.创建索引
CREATE INDEX  I_PanguSyncTargetTimestamp  on 表名(C_PanguSyncTargetTimestamp ) WITH (ONLINE = ON)

Mysql

源操作：

1.创建字段
alter table `源表` Add column `C_PanguSyncSourceTimestamp` timestamp(6) not null default current_timestamp(6) ON UPDATE CURRENT_TIMESTAMP(6);

2.设置分批时间
SET @row_number = 0;  
UPDATE  `源表`  SET  C_PanguSyncSourceTimestamp = TIMESTAMPADD(MICROSECOND, -(@row_number:=@row_number + 1), CAST(current_timestamp(6) AS DATETIME(6)))

3.创建索引
CREATE INDEX  I_PanguSyncSourceTimestamp   on `源表` (`C_PanguSyncSourceTimestamp`)
--------------------------------------------------------------------------------------------------------------------------------------
目标操作：

1.创建字段
alter table `目标表` Add column  C_PanguSyncTargetTimestamp  timestamp(6) NOT NULL DEFAULT '2000-01-01 00:00:00.000000'

2.设置分批时间

如果存在C_PanguSyncSourceTimestamp字段：

SET @row_number = 0;  
UPDATE  `目标表`  SET C_PanguSyncSourceTimestamp=C_PanguSyncSourceTimestamp,C_PanguSyncTargetTimestamp = TIMESTAMPADD(MICROSECOND, -(@row_number:=@row_number + 1), CAST('2000-01-01 00:00:00.000000' AS DATETIME(6)))


如果不存在C_PanguSyncSourceTimestamp字段：

SET @row_number = 0;  
UPDATE  `目标表`  SET  C_PanguSyncTargetTimestamp = TIMESTAMPADD(MICROSECOND, -(@row_number:=@row_number + 1), CAST('2000-01-01 00:00:00.000000' AS DATETIME(6)))

3.创建索引
CREATE INDEX  I_PanguSyncTargetTimestamp   on `目标表` (`C_PanguSyncTargetTimestamp`)