Мой Kbyte.Ru
Рассылка Kbyte.Ru
Группы на Kbyte.Ru
Партнеры Kbyte.Ru
Реклама
Сделано руками
Сделано руками
> Исходные коды - Narayana Vyas Kondreddi -

Microsoft SQL Server - Общие вопросы

Все примеры / Общие вопросы

Импорт данных

Автор: Narayana Vyas Kondreddi | добавлено: 03.02.2011, 20:56 | просмотров: 2336 (1+) | комментариев: 0 | рейтинг: *x1
Хранимая процедура, которая на основе данных одной таблицы создает готовые инструкции INSERT INTO для переноса данных в другую таблицу. Процедура имеет множество параметров. По умолчанию, процедура устанавливается в таблицу master и доступна из любой базы данных SQL Server.

Код

SET NOCOUNT ON
GO

PRINT 'Используем таблицу master'
USE master
GO

PRINT 'Проверяем существование себя :P'
IF (SELECT OBJECT_ID('sp_generate_inserts','P')) IS NOT NULL BEGIN
		PRINT 'Вот блин, процедура уже существует. Я не киллер, но выбора у меня нет :)'
		DROP PROC sp_generate_inserts
	END
GO

CREATE PROC sp_generate_inserts
(
	@table_name varchar(776),  		-- Имя таблицы, из которой нужно произвести импорт данных
	@target_table varchar(776) = NULL, 	-- Имя таблицы, в которую нужно передать данные
	@include_column_list bit = 1,		-- Включить/отключить генерацию имен колонок
	@from varchar(800) = NULL, 		-- Условия выборки данных из @table_name
	@include_timestamp bit = 0, 		-- Используйте 1 чтобы влюкчить TIMESTAMP/ROWVERSION, в противном случае - 0
	@debug_mode bit = 0,			-- Режим отладки
	@owner varchar(64) = NULL,		-- Используйте этот параметр, если вы не являетесь владельцем этой таблицы
	@ommit_images bit = 0,			-- Use this parameter to generate INSERT statements by omitting the 'image' columns
	@ommit_identity bit = 0,		-- Используйте этот параметр, чтобы создать ключевое поле
	@top int = NULL,			-- Укажите число строк, которые нужно включить в выборку
	@cols_to_include varchar(8000) = NULL,	-- Имена колонок, которые нужно включить в выборку
	@cols_to_exclude varchar(8000) = NULL,	-- Имена колонок, которые нужно исключить из выборки
	@disable_constraints bit = 0,
	@ommit_computed_cols bit = 0
)
AS
BEGIN

SET NOCOUNT ON

--Making sure user only uses either @cols_to_include or @cols_to_exclude
IF ((@cols_to_include IS NOT NULL) AND (@cols_to_exclude IS NOT NULL))
	BEGIN
		RAISERROR('Use either @cols_to_include or @cols_to_exclude. Do not use both the parameters at once',16,1)
		RETURN -1 --Failure. Reason: Both @cols_to_include and @cols_to_exclude parameters are specified
	END

--Making sure the @cols_to_include and @cols_to_exclude parameters are receiving values in proper format
IF ((@cols_to_include IS NOT NULL) AND (PATINDEX('''%''',@cols_to_include) = 0))
	BEGIN
		RAISERROR('Invalid use of @cols_to_include property',16,1)
		PRINT 'Specify column names surrounded by single quotes and separated by commas'
		PRINT 'Eg: EXEC sp_generate_inserts titles, @cols_to_include = "''title_id'',''title''"'
		RETURN -1 --Failure. Reason: Invalid use of @cols_to_include property
	END

IF ((@cols_to_exclude IS NOT NULL) AND (PATINDEX('''%''',@cols_to_exclude) = 0))
	BEGIN
		RAISERROR('Invalid use of @cols_to_exclude property',16,1)
		PRINT 'Specify column names surrounded by single quotes and separated by commas'
		PRINT 'Eg: EXEC sp_generate_inserts titles, @cols_to_exclude = "''title_id'',''title''"'
		RETURN -1 --Failure. Reason: Invalid use of @cols_to_exclude property
	END


--Checking to see if the database name is specified along wih the table name
--Your database context should be local to the table for which you want to generate INSERT statements
--specifying the database name is not allowed
IF (PARSENAME(@table_name,3)) IS NOT NULL
	BEGIN
		RAISERROR('Do not specify the database name. Be in the required database and just specify the table name.',16,1)
		RETURN -1 --Failure. Reason: Database name is specified along with the table name, which is not allowed
	END

--Checking for the existence of 'user table' or 'view'
--This procedure is not written to work on system tables
--To script the data in system tables, just create a view on the system tables and script the view instead

IF @owner IS NULL
	BEGIN
		IF ((OBJECT_ID(@table_name,'U') IS NULL) AND (OBJECT_ID(@table_name,'V') IS NULL)) 
			BEGIN
				RAISERROR('User table or view not found.',16,1)
				PRINT 'You may see this error, if you are not the owner of this table or view. In that case use @owner parameter to specify the owner name.'
				PRINT 'Make sure you have SELECT permission on that table or view.'
				RETURN -1 --Failure. Reason: There is no user table or view with this name
			END
	END
ELSE
	BEGIN
		IF NOT EXISTS (SELECT 1 FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = @table_name AND (TABLE_TYPE = 'BASE TABLE' OR TABLE_TYPE = 'VIEW') AND TABLE_SCHEMA = @owner)
			BEGIN
				RAISERROR('User table or view not found.',16,1)
				PRINT 'You may see this error, if you are not the owner of this table. In that case use @owner parameter to specify the owner name.'
				PRINT 'Make sure you have SELECT permission on that table or view.'
				RETURN -1 --Failure. Reason: There is no user table or view with this name		
			END
	END

--Variable declarations
DECLARE		@Column_ID int, 		
		@Column_List varchar(8000), 
		@Column_Name varchar(128), 
		@Start_Insert varchar(786), 
		@Data_Type varchar(128), 
		@Actual_Values varchar(8000),	--This is the string that will be finally executed to generate INSERT statements
		@IDN varchar(128)		--Will contain the IDENTITY column's name in the table

--Variable Initialization
SET @IDN = ''
SET @Column_ID = 0
SET @Column_Name = ''
SET @Column_List = ''
SET @Actual_Values = ''

IF @owner IS NULL 
	BEGIN
		SET @Start_Insert = 'INSERT INTO ' + '[' + RTRIM(COALESCE(@target_table,@table_name)) + ']' 
	END
ELSE
	BEGIN
		SET @Start_Insert = 'INSERT ' + '[' + LTRIM(RTRIM(@owner)) + '].' + '[' + RTRIM(COALESCE(@target_table,@table_name)) + ']' 		
	END


--To get the first column's ID

SELECT	@Column_ID = MIN(ORDINAL_POSITION) 	
FROM	INFORMATION_SCHEMA.COLUMNS (NOLOCK) 
WHERE 	TABLE_NAME = @table_name AND
(@owner IS NULL OR TABLE_SCHEMA = @owner)



--Loop through all the columns of the table, to get the column names and their data types
WHILE @Column_ID IS NOT NULL
	BEGIN
		SELECT 	@Column_Name = QUOTENAME(COLUMN_NAME), 
		@Data_Type = DATA_TYPE 
		FROM 	INFORMATION_SCHEMA.COLUMNS (NOLOCK) 
		WHERE 	ORDINAL_POSITION = @Column_ID AND 
		TABLE_NAME = @table_name AND
		(@owner IS NULL OR TABLE_SCHEMA = @owner)



		IF @cols_to_include IS NOT NULL --Selecting only user specified columns
		BEGIN
			IF CHARINDEX( '''' + SUBSTRING(@Column_Name,2,LEN(@Column_Name)-2) + '''',@cols_to_include) = 0 
			BEGIN
				GOTO SKIP_LOOP
			END
		END

		IF @cols_to_exclude IS NOT NULL --Selecting only user specified columns
		BEGIN
			IF CHARINDEX( '''' + SUBSTRING(@Column_Name,2,LEN(@Column_Name)-2) + '''',@cols_to_exclude) <> 0 
			BEGIN
				GOTO SKIP_LOOP
			END
		END

		--Making sure to output SET IDENTITY_INSERT ON/OFF in case the table has an IDENTITY column
		IF (SELECT COLUMNPROPERTY( OBJECT_ID(QUOTENAME(COALESCE(@owner,USER_NAME())) + '.' + @table_name),SUBSTRING(@Column_Name,2,LEN(@Column_Name) - 2),'IsIdentity')) = 1 
		BEGIN
			IF @ommit_identity = 0 --Determing whether to include or exclude the IDENTITY column
				SET @IDN = @Column_Name
			ELSE
				GOTO SKIP_LOOP			
		END
		
		--Making sure whether to output computed columns or not
		IF @ommit_computed_cols = 1
		BEGIN
			IF (SELECT COLUMNPROPERTY( OBJECT_ID(QUOTENAME(COALESCE(@owner,USER_NAME())) + '.' + @table_name),SUBSTRING(@Column_Name,2,LEN(@Column_Name) - 2),'IsComputed')) = 1 
			BEGIN
				GOTO SKIP_LOOP					
			END
		END
		
		--Tables with columns of IMAGE data type are not supported for obvious reasons
		IF(@Data_Type in ('image'))
			BEGIN
				IF (@ommit_images = 0)
					BEGIN
						RAISERROR('Tables with image columns are not supported.',16,1)
						PRINT 'Use @ommit_images = 1 parameter to generate INSERTs for the rest of the columns.'
						PRINT 'DO NOT ommit Column List in the INSERT statements. If you ommit column list using @include_column_list=0, the generated INSERTs will fail.'
						RETURN -1 --Failure. Reason: There is a column with image data type
					END
				ELSE
					BEGIN
					GOTO SKIP_LOOP
					END
			END

		--Determining the data type of the column and depending on the data type, the VALUES part of
		--the INSERT statement is generated. Care is taken to handle columns with NULL values. Also
		--making sure, not to lose any data from flot, real, money, smallmomey, datetime columns
		SET @Actual_Values = @Actual_Values  +
		CASE 
			WHEN @Data_Type IN ('char','varchar','nchar','nvarchar') 
				THEN 
					'COALESCE('''''''' + REPLACE(RTRIM(' + @Column_Name + '),'''''''','''''''''''')+'''''''',''NULL'')'
			WHEN @Data_Type IN ('datetime','smalldatetime') 
				THEN 
					'COALESCE('''''''' + RTRIM(CONVERT(char,' + @Column_Name + ',109))+'''''''',''NULL'')'
			WHEN @Data_Type IN ('uniqueidentifier') 
				THEN  
					'COALESCE('''''''' + REPLACE(CONVERT(char(255),RTRIM(' + @Column_Name + ')),'''''''','''''''''''')+'''''''',''NULL'')'
			WHEN @Data_Type IN ('text','ntext') 
				THEN  
					'COALESCE('''''''' + REPLACE(CONVERT(char(8000),' + @Column_Name + '),'''''''','''''''''''')+'''''''',''NULL'')'					
			WHEN @Data_Type IN ('binary','varbinary') 
				THEN  
					'COALESCE(RTRIM(CONVERT(char,' + 'CONVERT(int,' + @Column_Name + '))),''NULL'')'  
			WHEN @Data_Type IN ('timestamp','rowversion') 
				THEN  
					CASE 
						WHEN @include_timestamp = 0 
							THEN 
								'''DEFAULT''' 
							ELSE 
								'COALESCE(RTRIM(CONVERT(char,' + 'CONVERT(int,' + @Column_Name + '))),''NULL'')'  
					END
			WHEN @Data_Type IN ('float','real','money','smallmoney')
				THEN
					'COALESCE(LTRIM(RTRIM(' + 'CONVERT(char, ' +  @Column_Name  + ',2)' + ')),''NULL'')' 
			ELSE 
				'COALESCE(LTRIM(RTRIM(' + 'CONVERT(char, ' +  @Column_Name  + ')' + ')),''NULL'')' 
		END   + '+' +  ''',''' + ' + '
		
		--Generating the column list for the INSERT statement
		SET @Column_List = @Column_List +  @Column_Name + ','	

		SKIP_LOOP: --The label used in GOTO

		SELECT 	@Column_ID = MIN(ORDINAL_POSITION) 
		FROM 	INFORMATION_SCHEMA.COLUMNS (NOLOCK) 
		WHERE 	TABLE_NAME = @table_name AND 
		ORDINAL_POSITION > @Column_ID AND
		(@owner IS NULL OR TABLE_SCHEMA = @owner)


	--Loop ends here!
	END

--To get rid of the extra characters that got concatenated during the last run through the loop
SET @Column_List = LEFT(@Column_List,len(@Column_List) - 1)
SET @Actual_Values = LEFT(@Actual_Values,len(@Actual_Values) - 6)

IF LTRIM(@Column_List) = '' 
	BEGIN
		RAISERROR('No columns to select. There should at least be one column to generate the output',16,1)
		RETURN -1 --Failure. Reason: Looks like all the columns are ommitted using the @cols_to_exclude parameter
	END

--Forming the final string that will be executed, to output the INSERT statements
IF (@include_column_list <> 0)
	BEGIN
		SET @Actual_Values = 
			'SELECT ' +  
			CASE WHEN @top IS NULL OR @top < 0 THEN '' ELSE ' TOP ' + LTRIM(STR(@top)) + ' ' END + 
			'''' + RTRIM(@Start_Insert) + 
			' ''+' + '''(' + RTRIM(@Column_List) +  '''+' + ''')''' + 
			' +''VALUES(''+ ' +  @Actual_Values  + '+'')''' + ' ' + 
			COALESCE(@from,' FROM ' + CASE WHEN @owner IS NULL THEN '' ELSE '[' + LTRIM(RTRIM(@owner)) + '].' END + '[' + rtrim(@table_name) + ']' + '(NOLOCK)')
	END
ELSE IF (@include_column_list = 0)
	BEGIN
		SET @Actual_Values = 
			'SELECT ' + 
			CASE WHEN @top IS NULL OR @top < 0 THEN '' ELSE ' TOP ' + LTRIM(STR(@top)) + ' ' END + 
			'''' + RTRIM(@Start_Insert) + 
			' '' +''VALUES(''+ ' +  @Actual_Values + '+'')''' + ' ' + 
			COALESCE(@from,' FROM ' + CASE WHEN @owner IS NULL THEN '' ELSE '[' + LTRIM(RTRIM(@owner)) + '].' END + '[' + rtrim(@table_name) + ']' + '(NOLOCK)')
	END	

--Determining whether to ouput any debug information
IF @debug_mode =1
	BEGIN
		PRINT '/*****START OF DEBUG INFORMATION*****'
		PRINT 'Beginning of the INSERT statement:'
		PRINT @Start_Insert
		PRINT ''
		PRINT 'The column list:'
		PRINT @Column_List
		PRINT ''
		PRINT 'The SELECT statement executed to generate the INSERTs'
		PRINT @Actual_Values
		PRINT ''
		PRINT '*****END OF DEBUG INFORMATION*****/'
		PRINT ''
	END
		
PRINT '--INSERTs generated by ''sp_generate_inserts'' stored procedure written by Vyas'
PRINT '--Build number: 22'
PRINT '--Возникнут проблемы или вопросы:'
PRINT '--http://kbyte.ru/ru/Forums'
PRINT ''
PRINT 'SET NOCOUNT ON'
PRINT ''


--Determining whether to print IDENTITY_INSERT or not
IF (@IDN <> '')
	BEGIN
		PRINT 'SET IDENTITY_INSERT ' + QUOTENAME(COALESCE(@owner,USER_NAME())) + '.' + QUOTENAME(@table_name) + ' ON'
		PRINT 'GO'
		PRINT ''
	END


IF @disable_constraints = 1 AND (OBJECT_ID(QUOTENAME(COALESCE(@owner,USER_NAME())) + '.' + @table_name, 'U') IS NOT NULL)
	BEGIN
		IF @owner IS NULL
			BEGIN
				SELECT 	'ALTER TABLE ' + QUOTENAME(COALESCE(@target_table, @table_name)) + ' NOCHECK CONSTRAINT ALL' AS '--Code to disable constraints temporarily'
			END
		ELSE
			BEGIN
				SELECT 	'ALTER TABLE ' + QUOTENAME(@owner) + '.' + QUOTENAME(COALESCE(@target_table, @table_name)) + ' NOCHECK CONSTRAINT ALL' AS '--Code to disable constraints temporarily'
			END

		PRINT 'GO'
	END

PRINT ''
PRINT 'PRINT ''Inserting values into ' + '[' + RTRIM(COALESCE(@target_table,@table_name)) + ']' + ''''


--All the hard work pays off here!!! You'll get your INSERT statements, when the next line executes!
EXEC (@Actual_Values)

PRINT 'PRINT ''Готово'''
PRINT ''


IF @disable_constraints = 1 AND (OBJECT_ID(QUOTENAME(COALESCE(@owner,USER_NAME())) + '.' + @table_name, 'U') IS NOT NULL)
	BEGIN
		IF @owner IS NULL
			BEGIN
				SELECT 	'ALTER TABLE ' + QUOTENAME(COALESCE(@target_table, @table_name)) + ' CHECK CONSTRAINT ALL'  AS '--Code to enable the previously disabled constraints'
			END
		ELSE
			BEGIN
				SELECT 	'ALTER TABLE ' + QUOTENAME(@owner) + '.' + QUOTENAME(COALESCE(@target_table, @table_name)) + ' CHECK CONSTRAINT ALL' AS '--Code to enable the previously disabled constraints'
			END

		PRINT 'GO'
	END

PRINT ''
IF (@IDN <> '')
	BEGIN
		PRINT 'SET IDENTITY_INSERT ' + QUOTENAME(COALESCE(@owner,USER_NAME())) + '.' + QUOTENAME(@table_name) + ' OFF'
		PRINT 'GO'
	END

PRINT 'SET NOCOUNT OFF'


SET NOCOUNT OFF
RETURN 0
END

GO

PRINT 'Процедура, на удивление, создана :)'
GO


--Mark procedure as system object
EXEC sys.sp_MS_marksystemobject sp_generate_inserts
GO

PRINT 'Включаем разрешение на запуск для всех пользователей'
GRANT EXEC ON sp_generate_inserts TO public

SET NOCOUNT OFF
GO

PRINT 'Готово!'
Об авторе

Narayana Vyas Kondreddi

Нет информации об авторе...
Narayana Vyas Kondreddi
Последние комментарии (всего: 0)

Добавлять комментарии могут только зарегистрированные пользователи сайта.
Если у Вас уже есть учетная запись на Kbyte.Ru, пройдите процедуру авторизации OpenID.
Если Вы еще не зарегистрированы на Kbyte.Ru - зарегистрируйтесь.


Нет комментариев...

Авторизация
 
OpenID
Зарегистрируйся и получи 10% скидку на добавление своего сайта в каталоги! Подробнее »
Поиск по сайту
Реклама
Счетчики