尽管我有“提交交易”声明，但交易未提交

Question

I'm using SQL Azure and trying to do conditional delete in batches for a large table, sample:

DECLARE
    @LargestKeyProcessed BIGINT =1,
    @NextBatchMax BIGINT,
    @msg varchar(max) ='';
 
WHILE (@LargestKeyProcessed <= 1000000)
BEGIN
 Begin Transaction
 SET @NextBatchMax = @LargestKeyProcessed + 50000;
  DELETE From mytable
  WHERE Id > @LargestKeyProcessed AND Id <= @NextBatchMax And some logic
  SET @LargestKeyProcessed = @NextBatchMax;
    set @msg=''+@LargestKeyProcessed;
  RAISERROR(@msg, 0, 1) WITH NOWAIT
  Commit Transaction
END

After the command gets executed successfully I close the tab but SSMS says there are uncomitted transactions although the commit statement is in every iteration. Also the database size seems to remain the same.

I kindly seek your support in explaining why this happens

Thank you very much

Answer 1

I think you can try to add SET IMPLICIT_TRANSACTIONS OFF to the sql. As follows to see if solved your issue.

DECLARE
    @LargestKeyProcessed BIGINT =1,
    @NextBatchMax BIGINT,
    @msg varchar(max) ='';
 
WHILE (@LargestKeyProcessed <= 1000000)
BEGIN
 SET IMPLICIT_TRANSACTIONS OFF  
 Begin Transaction
 SET @NextBatchMax = @LargestKeyProcessed + 50000;
  DELETE From mytable
  WHERE Id > @LargestKeyProcessed AND Id <= @NextBatchMax And some logic
  SET @LargestKeyProcessed = @NextBatchMax;
    set @msg=''+@LargestKeyProcessed;
  RAISERROR(@msg, 0, 1) WITH NOWAIT
  Commit Transaction
END