使用flink-cdc-sqlserver出现错误，需要批量开启sqlserver表cdc模式，监听表变化

本文介绍: 校验。

docker run -e "ACCEPT_EULA=Y" -e "MSSQL_SA_PASSWORD=Zcyc123456" -p 1433:1433 --name sqlserver -d mcr.microsoft.com/mssql/server:2017-latest

选择你自己的数据库，执行以下sql语句

EXEC sys.sp_cdc_enable_db;

校验

SELECT is_cdc_enabled FROM sys.databases WHERE name = YourDatabaseName

原因：即使您在数据库级别启用了CDC（Change Data Capture）功能，对于要捕获变更的特定表，仍然需要在表级别单独启用CDC。启动数据库级别的CDC功能为该数据库开启了使用CDC技术的基础环境，但不会自动对任何用户表进行变更数据捕获。

-- 确保当前数据库已启用CDC
USE test;
GO

-- 获取dbo架构下所有用户表名（可以根据需要修改查询以选择不同架构或添加其他过滤条件）
DECLARE @TableNames TABLE (TableName SYSNAME);

INSERT INTO @TableNames (TableName)
SELECT t.name
FROM sys.tables t
WHERE t.is_ms_shipped = 0 -- 排除系统表和临时表
AND t.schema_id = SCHEMA_ID('dbo') -- 只考虑dbo架构下的表
-- AND t.some_column IS NOT NULL -- 添加任何其他你想要应用的筛选条件

-- 遍历表格并启用CDC
DECLARE @CurrentTableName SYSNAME;

DECLARE TableCursor CURSOR FOR
SELECT TableName FROM @TableNames;

OPEN TableCursor;

FETCH NEXT FROM TableCursor INTO @CurrentTableName;

WHILE @@FETCH_STATUS = 0
BEGIN
    IF NOT EXISTS (SELECT 1 FROM sys.change_tracking_tables WHERE object_id = OBJECT_ID(@CurrentTableName) AND is_track_columns_updated_on = 1)
    BEGIN
        DECLARE @Sql NVARCHAR(MAX) = N'EXEC sys.sp_cdc_enable_table
            @source_schema = N''dbo'', 
            @source_name = N''' + @CurrentTableName + ''', 
            @role_name = NULL, 
            @capture_instance = N''dbo_' + @CurrentTableName + '''';

        EXEC sp_executesql @Sql;
    END

    FETCH NEXT FROM TableCursor INTO @CurrentTableName;
END

CLOSE TableCursor;
DEALLOCATE TableCursor;

还需要开启SQL Server Agent才能够使用cdc功能

docker exec -it sql1 "bash"
 
root@b9a09ce17c02:/# /opt/mssql/bin/mssql-conf set sqlagent.enabled true
 
SQL Server needs to be restarted in order to apply this setting. Please run
 
'systemctl restart mssql-server.service'.
 
root@b9a09ce17c02:/# exit
 
exit
 
[root@localhost ~]#
 
[root@localhost ~]# docker stop sql1
 
sql1
 
[root@localhost ~]# docker start sql1
 
sql1

-- Check if CDC is enabled on the database
SELECT name, is_cdc_enabled FROM sys.databases WHERE name = 'your_database_name';

-- Check if CDC is enabled on the tables
SELECT s.name AS schema_name, t.name AS table_name, t.is_tracked_by_cdc
FROM sys.tables t
JOIN sys.schemas s ON t.schema_id = s.schema_id
WHERE t.is_tracked_by_cdc = 1;