How to ALTER the Table Value Parameter

问题

I am not getting option like 'ALTER TO' when am right clicking on TVP

回答1:

Can't do it. You must drop/recreate. If you have dependencies on the TVP, you must:

1. create new TVP under new name
2. alter dependencies to use (1)
3. drop old TVP
4. recreate (1) under original name
5. alter dependencies to use (4)
6. drop (1)

回答2:

I've found a blog post on sqltreeo.com which has a way to automate the process by temporary dropping the dependencies and then re-creating them.

I just modified it a bit.

1.You should create the following procedure:

-- Find all referencing objects to user-defined table type in @fullObjectName parameter
-- and generate DROP scripts and CREATE scripts for them
CREATE PROC [dbo].[alterTableType] (@fullObjectName VARCHAR(200))
AS
BEGIN
    SET NOCOUNT ON

    IF (TYPE_ID (@fullObjectName) IS NULL)
    BEGIN
        RAISERROR ('User-defined table type ''%s'' does not exists. Include full object name with schema.', 16,1, @fullObjectName)
        RETURN
    END;

    WITH sources
    AS
    (
        SELECT ROW_NUMBER() OVER (ORDER BY OBJECT_NAME(m.object_id)) RowId, definition
        FROM sys.sql_expression_dependencies d
        JOIN sys.sql_modules m ON m.object_id = d.referencing_id
        JOIN sys.objects o ON o.object_id = m.object_id
        WHERE referenced_id = TYPE_ID(@fullObjectName)
    )
    SELECT 'BEGIN TRANSACTION'
    UNION ALL   
    SELECT 

        'DROP ' +
            CASE OBJECTPROPERTY(referencing_id, 'IsProcedure')
            WHEN 1 THEN 'PROC '
            ELSE
                CASE
                    WHEN OBJECTPROPERTY(referencing_id, 'IsScalarFunction') = 1 OR OBJECTPROPERTY(referencing_id, 'IsTableFunction') = 1 OR OBJECTPROPERTY(referencing_id, 'IsInlineFunction') = 1 THEN 'FUNCTION '
                    ELSE ''
                END
            END
        + SCHEMA_NAME(o.schema_id) + '.' +
        + OBJECT_NAME(m.object_id)    

    FROM sys.sql_expression_dependencies d
    JOIN sys.sql_modules m ON m.object_id = d.referencing_id
    JOIN sys.objects o ON o.object_id = m.object_id
    WHERE referenced_id = TYPE_ID(@fullObjectName)
    UNION  ALL
    SELECT  'GO'
    UNION ALL
    SELECT CHAR(13) + CHAR(10) + '---- WRITE HERE SCRIPT TO DROP OLD USER DEFINED TABLE TYPE AND CREATE A NEW ONE ----' + CHAR(13) + CHAR(10)
    UNION  ALL
    SELECT
        CASE
            WHEN number = RowId    THEN DEFINITION
            ELSE 'GO'
        END
     FROM sources s
    JOIN (SELECT DISTINCT number FROM master.dbo.spt_values) n ON n.number BETWEEN RowId AND RowId+1
    UNION ALL
    SELECT 'COMMIT'
END

2.Then you should run it with your table type name as a input parameter. Show the results on grid format (because text format might truncate long texts), select entire result table and copy it to a new query window.

回答3:

Problem

You cannot drop the User Defined Table Type as long as it's referenced by anything else:

Cannot drop type 'dbo.MyTableType' because it is being referenced by object 'MyStoredProcedure'. There may be other objects that reference this type.

It would be nice if SSMS gave you a listing of all other objects, but if you don't have many, a partially manual approach might work fine.

Find Usages

To get a list of all SPs that use your TVP type, you can query sys.sql_expression_dependencies

SELECT OBJECT_NAME(d.referencing_id)
FROM sys.sql_expression_dependencies d
WHERE d.referenced_id = TYPE_ID('MyTableType')

Steps

1. Select all SPs identified above and select DROP and CREATE to new window
2. Go through each window, and just highlight / execute the DROP PROCEDURE section
3. Now you can select your type and select DROP and CREATE to new window and make any changes
4. Go back to the list of SP's windows you opened and execute the CREATE section

Further Reading

• Altering user-defined table types in SQL Server
• How to do ALTER TABLE TYPE efficiently
• List user defined types in a SQL Server database

来源：https://stackoverflow.com/questions/1734541/how-to-alter-the-table-value-parameter