SQL Server：變量刪除表和架構

我正在嘗試使用其他變量內的變量和其他變量執行刪除表。一些變量由查詢定義，然後在其他查詢的結果中使用。但是我遇到了這個問題，因爲當我解析我得到時SQL Server：變量刪除表和架構

命令成功完成。

但是，當我嘗試執行我得到以下錯誤信息。

消息245，級別16，狀態1，行18
轉換轉換VARCHAR值 'S' 爲數據類型int時失敗。

我找不出'S'的實際價值。

第18行是指

EXEC @defn_id_query

，它指的是變量在下面

SET @defn_id_query = (
'SELECT defn_id FROM ' + @systemschema + '.[defn] 
WHERE [defn_type_name] = ''CONTAINER'' 
AND defn_subtype_id = 1 
AND defn_name = ''' + @schema + '' 
)

上市下面是完整的代碼

DECLARE @defn_ver_id_query varchar 
DECLARE @defn_ver_id int 
DECLARE @defn_id_query varchar 
DECLARE @defn_id int 
DECLARE @schema varchar 
DECLARE @deleteschema varchar 
DECLARE @systemschema varchar 
DECLARE @variableSET varchar 
DECLARE @deletesreferences varchar 
SET @schema = 'fpscdb001_ws_001' 
SET @systemschema = '[fpscdb001_system]' 
SET @defn_id_query = (
'SELECT defn_id FROM ' + @systemschema + '.[defn] 
WHERE [defn_type_name] = ''CONTAINER'' 
AND defn_subtype_id = 1 
AND defn_name = ''' + @schema + '' 
) 
EXEC @defn_id_query 
EXEC @defn_ver_id_query 
SET @defn_id = (@defn_id_query) 
SET @defn_ver_id = (@defn_ver_id_query) 
SET @defn_ver_id_query = ('SELECT [defn_ver_id] 
    FROM ' + @systemschema + '.[defn_ver] 
    WHERE defn_id = @defn_id') 
SET @deleteschema = (
'DROP TABLE ' + @schema + '.[id_generator] 
DROP TABLE ' + @schema + '.[incident] 
DROP TABLE ' + @schema + '.[incident_bal] 
DROP TABLE ' + @schema + '.[incident_event_sum] 
DROP TABLE ' + @schema + '.[incident_FH_HOURS] 
DROP TABLE ' + @schema + '.[incident_FH_STAGE1] 
DROP TABLE ' + @schema + '.[incident_FH_STAGE2] 
DROP TABLE ' + @schema + '.[incident_FH_STAGE3] 
DROP TABLE ' + @schema + '.[incident_FH_STAGE3a] 
DROP TABLE ' + @schema + '.[incident_FH_STAGE3b] 
DROP TABLE ' + @schema + '.[incident_FH_STAGE3c] 
DROP TABLE ' + @schema + '.[incident_FH_STAGE3d] 
DROP TABLE ' + @schema + '.[incident_FH_Stage4] 
DROP TABLE ' + @schema + '.[incident_ST_STAGE1] 
DROP TABLE ' + @schema + '.[incident_ST_STAGE2]DECLARE @defn_ver_id_query varchar 
DECLARE @defn_ver_id int 
DECLARE @defn_id_query varchar 
DECLARE @defn_id int 
DECLARE @schema varchar 
DECLARE @deleteschema varchar 
DECLARE @systemschema varchar 
DECLARE @variableSET varchar 
DECLARE @deletesreferences varchar 
SET @schema = 'fpscdb001_ws_001' 
SET @systemschema = '[fpscdb001_system]' 
SET @defn_id_query = (
'SELECT defn_id FROM ' + @systemschema + '.[defn] 
WHERE [defn_type_name] = ''CONTAINER'' 
AND defn_subtype_id = 1 
AND defn_name = ''' + @schema + '' 
) 
SET @defn_id = (@defn_id_query) 
SET @defn_ver_id = (@defn_ver_id_query) 
EXEC @defn_id_query 
EXEC @defn_ver_id_query 

SET @defn_ver_id_query = ('SELECT [defn_ver_id] 
    FROM ' + @systemschema + '.[defn_ver] 
    WHERE defn_id = @defn_id') 
SET @deleteschema = (
'DROP TABLE ' + @schema + '.[id_generator] 
DROP TABLE ' + @schema + '.[incident] 
DROP TABLE ' + @schema + '.[incident_bal] 
DROP TABLE ' + @schema + '.[incident_event_sum] 
DROP TABLE ' + @schema + '.[incident_FH_HOURS] 
DROP TABLE ' + @schema + '.[incident_FH_STAGE1] 
DROP TABLE ' + @schema + '.[incident_FH_STAGE2] 
DROP TABLE ' + @schema + '.[incident_FH_STAGE3] 
DROP TABLE ' + @schema + '.[incident_FH_STAGE3a] 
DROP TABLE ' + @schema + '.[incident_FH_STAGE3b] 
DROP TABLE ' + @schema + '.[incident_FH_STAGE3c] 
DROP TABLE ' + @schema + '.[incident_FH_STAGE3d] 
DROP TABLE ' + @schema + '.[incident_FH_Stage4] 
DROP TABLE ' + @schema + '.[incident_ST_STAGE1] 
DROP TABLE ' + @schema + '.[incident_ST_STAGE2] 
DROP TABLE ' + @schema + '.[incident_ST_STAGE3] 
DROP TABLE ' + @schema + '.[incident_status] 
DROP TABLE ' + @schema + '.[incident_transn] 
DROP TABLE ' + @schema + '.[incident_transn_sum] 
DROP TABLE ' + @schema + '.[item_field_journal] 
DROP SCHEMA ' + @schema 
) 
SET @deletesreferences = (' 
DELETE FROM ' + @systemschema + '.[defn_reln] 
WHERE from_defn_ver_id = @defn_ver_id 
DELETE FROM ' + @systemschema + '.[defn_ver] 
WHERE defn_id = ' + @defn_id + ' 
DELETE FROM ' + @systemschema + '.[cal_wksp] 
WHERE wksp_defn_id = ' + @defn_id + ' 
DELETE FROM ' + @systemschema + '.[bus_proc_defn] 
WHERE defn_id = ' + @defn_id + ' 
DELETE FROM ' + @systemschema + '.[defn] 
WHERE [defn_type_name] = ''CONTAINER'' 
AND defn_subtype_id = 1 
and defn_id = ' + @defn_id) 
EXEC @deleteschema 
EXEC @deletesreferences 

DROP TABLE ' + @schema + '.[incident_ST_STAGE3] 
DROP TABLE ' + @schema + '.[incident_status] 
DROP TABLE ' + @schema + '.[incident_transn] 
DROP TABLE ' + @schema + '.[incident_transn_sum] 
DROP TABLE ' + @schema + '.[item_field_journal] 
DROP SCHEMA ' + @schema 
) 
SET @deletesreferences = (' 
DELETE FROM ' + @systemschema + '.[defn_reln] 
WHERE from_defn_ver_id = @defn_ver_id 
DELETE FROM ' + @systemschema + '.[defn_ver] 
WHERE defn_id = ' + @defn_id + ' 
DELETE FROM ' + @systemschema + '.[cal_wksp] 
WHERE wksp_defn_id = ' + @defn_id + ' 
DELETE FROM ' + @systemschema + '.[bus_proc_defn] 
WHERE defn_id = ' + @defn_id + ' 
DELETE FROM ' + @systemschema + '.[defn] 
WHERE [defn_type_name] = ''CONTAINER'' 
AND defn_subtype_id = 1 
and defn_id = ' + @defn_id) 
EXEC @deleteschema 
EXEC @deletesreferences

我願意接受其他解決方案專業人士建議什麼？

感謝

編輯：

我猜所有這些撇號的取消是混淆我...我曾嘗試以下

SET @defn_ver_id_query = ('SELECT [defn_ver_id] 
FROM ' + @systemschema + '.[defn_ver] 
WHERE defn_id = convert(nvarchar(max),' + @defn_id + '')

我自己也嘗試這種方式以及。

SET @defn_ver_id_query = ('SELECT [defn_ver_id] 
FROM ' + @systemschema + '.[defn_ver] 
WHERE defn_id = ' + convert(nvarchar(max),@defn_id) + '')

新FULL編輯

DECLARE @defn_ver_id_query varchar(max) 
DECLARE @defn_ver_id int 
DECLARE @defn_id_query varchar(max) 
DECLARE @defn_id int 
DECLARE @schema varchar(max) 
DECLARE @deleteschema varchar(max) 
DECLARE @systemschema varchar(max) 
DECLARE @variableSET varchar(max) 
DECLARE @deletesreferences varchar(max) 
SET @schema = 'fpscdb001_ws_001' 
SET @systemschema = '[fpscdb001_system]' 
SET @defn_id_query = (
'SELECT defn_id FROM ' + @systemschema + '.[defn] 
WHERE [defn_type_name] = ''CONTAINER'' 
AND defn_subtype_id = 1 
AND defn_name = ' + @schema + '' 
) 
SET @defn_id = (@defn_id_query) 
SET @defn_ver_id = (@defn_ver_id_query) 
EXEC (@defn_id_query) 
EXEC (@defn_ver_id_query) 

SET @defn_ver_id_query = ('SELECT [defn_ver_id] 
    FROM ' + @systemschema + '.[defn_ver] 
    WHERE defn_id = ' + convert(nvarchar(max),@defn_id) + '') 
SET @deleteschema = (
'DROP TABLE ' + @schema + '.[id_generator] 
DROP TABLE ' + @schema + '.[incident] 
DROP TABLE ' + @schema + '.[incident_bal] 
DROP TABLE ' + @schema + '.[incident_event_sum] 
DROP TABLE ' + @schema + '.[incident_FH_HOURS] 
DROP TABLE ' + @schema + '.[incident_FH_STAGE1] 
DROP TABLE ' + @schema + '.[incident_FH_STAGE2] 
DROP TABLE ' + @schema + '.[incident_FH_STAGE3] 
DROP TABLE ' + @schema + '.[incident_FH_STAGE3a] 
DROP TABLE ' + @schema + '.[incident_FH_STAGE3b] 
DROP TABLE ' + @schema + '.[incident_FH_STAGE3c] 
DROP TABLE ' + @schema + '.[incident_FH_STAGE3d] 
DROP TABLE ' + @schema + '.[incident_FH_Stage4] 
DROP TABLE ' + @schema + '.[incident_ST_STAGE1] 
DROP TABLE ' + @schema + '.[incident_ST_STAGE2] 
DROP TABLE ' + @schema + '.[incident_ST_STAGE3] 
DROP TABLE ' + @schema + '.[incident_status] 
DROP TABLE ' + @schema + '.[incident_transn] 
DROP TABLE ' + @schema + '.[incident_transn_sum] 
DROP TABLE ' + @schema + '.[item_field_journal] 
DROP SCHEMA ' + @schema 
) 
SET @deletesreferences = (' 
DELETE FROM ' + @systemschema + '.[defn_reln] 
WHERE from_defn_ver_id = ' + convert(nvarchar(max),@defn_ver_id) + ' 
DELETE FROM ' + @systemschema + '.[defn_ver] 
WHERE defn_id = ' + convert(nvarchar(max),@defn_id) + ' 
DELETE FROM ' + @systemschema + '.[cal_wksp] 
WHERE wksp_defn_id = ' + convert(nvarchar(max),@defn_id) + ' 
DELETE FROM ' + @systemschema + '.[bus_proc_defn] 
WHERE defn_id = ' + convert(nvarchar(max),@defn_id) + ' 
DELETE FROM ' + @systemschema + '.[defn] 
WHERE [defn_type_name] = ''CONTAINER'' 
AND defn_subtype_id = 1 
and defn_id = ' + convert(nvarchar(max),@defn_id)) 
EXEC (@deleteschema) 
EXEC (@deletesreferences)

來源

2015-06-20 user2869135

聲明'varchar'沒有長度是你的問題的一部分。你還需要在使用'+'連接時將int轉換爲'varchar'。在'exec'調用中需要括號。 –

如果聲明沒有長度的'varchar'，它默認爲'varchar（1）'。所以，例如，你的變量'@ defn_ver_id_query' ='S'。再加上其他人指出的一切。 – Andrew

感謝您的快速回復！好吧，現在我已經做出了你和lonic已經做出的調整，現在我收到一條錯誤信息，我相信我錯過了使用「SET」。我希望將defn_id設置爲defn_id_query的結果。 – user2869135

我建議：如果你嘗試將值Concat的到一個字符串，它是不是一個字符串

，將其轉換！示例：SET @string = 'Hello '+CONVERT(nvarchar(max),1);
如果將值轉換爲NVARCHAR，則需要指定長度。例如：NVARCHAR(100)。就你而言，當你試圖將它連接到一個SQL查詢時，你可以使用CONVERT(nvarchar(max),...)。之後它會回落到較低的長度。
您嘗試在字符串中使用字符串。例如：SET @string = 'The String holds 'User'!'。這是錯誤的。你需要在字符串中轉義逗號，你可以通過雙引號來做到這一點。看到這個例子：SET @string = 'The String holds ''User''!'
如果您嘗試將值添加到字符串，則需要將其添加至+：SET @string = 'Hello ' + 'User';
如果試圖執行動態SQL（你試過），你需要評估SQL變量。您可以通過在字符串周圍使用大括號來完成此操作例如：EXEC(@sqlString)。你試圖這樣做：EXEC @sqlString。這種方式SQL Server查找名爲@sqlString的過程，這是錯誤的。

希望這會幫助您解決所有問題。

來源

2015-06-20 20:16:43 Ionic

@ lonic我已經根據你的建議做了一些調整，我試着根據你的第一個建議進行調整，我已經將它們添加到了我的編輯部分，我相信我現在也更正了我的撇號，並且我在每個exec以及。 – user2869135

是的，現在看起來好多了！初看起來，我認爲它現在應該起作用了？ – Ionic

好吧，我在你的代碼中看到了一件事。 SET @defn_ver_id_query =（'SELECT [defn_ver_id] ...）'這些括號不需要用於字符串賦值。稍後您需要括號用於'EXEC'，但不適用於作業。你可以把它們留在那裏。 – Ionic

SQL Server：變量刪除表和架構

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