我正在尝试在使用 Apache Nifi 中的 Execute SQL 处理器之间使用 Begin - End 和 Cursor 执行 SQL 语句。但这会引发一个错误,告诉“无法执行 SQL 选择查询”。如何在 nifi 中执行事务 SQL 语句?哪种处理器最适合这个?
下面是我试图执行的 SQL 代码片段,
DECLARE @Cursor CURSOR
DECLARE @stlsn binary(10), @endlsn binary(10), @sequal binary(10), @op char, @upm varbinary(128), @rn numeric, @tg char(10), @ti char(10), @ln char(10), @dv char(10), @cid int
BEGIN
SET @Cursor = CURSOR FOR
SELECT * FROM cdc.dbo_SampleDB_CT
OPEN @Cursor
FETCH NEXT FROM @Cursor INTO @stlsn, @endlsn, @sequal, @op, @upm, @rn, @tg, @ti, @ln, @dv, @cid
WHILE @@FETCH_STATUS = 0
BEGIN
SELECT @op, @rn, @tg, @ti, @ln, @dv
IF @op= 1 Execute ('DELETE FROM dbo.NewDB WHERE RNo = '+@rn)
IF @op= 2 Execute ('INSERT INTO dbo.NewDB VALUES ('+@rn+','''+@tg+''','''+@ti+''','''+@ln+''','''+@dv+''')')
FETCH NEXT FROM @Cursor INTO @stlsn, @endlsn, @sequal, @op, @upm, @rn, @tg, @ti, @ln, @dv, @cid
END;
CLOSE @Cursor ;
DEALLOCATE @Cursor;
END;