Jun 24, 2026, 10:30 AM
This commit is contained in:
Paweł Domański
@@ -0,0 +1,185 @@
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-- ======================================================
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-- DYNAMIC COLUMN DATA TYPE UPDATE SCRIPT (v3)
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-- ======================================================
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SET XACT_ABORT ON;
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SET NOCOUNT ON;
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SET LOCK_TIMEOUT 5000; -- avoid hanging forever on busy objects
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------------------------------------------------------------
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-- CONFIGURATION
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------------------------------------------------------------
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DECLARE @NewDataType NVARCHAR(100) = 'Varchar(9)'; -- <-- Target datatype
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DECLARE @ColumnPattern NVARCHAR(100) = '%DUN%'; -- <-- Column/Parameter pattern
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DECLARE @DryRun BIT = 0 --1 is for print, 0 is for execute
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------------------------------------------------------------
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------------------------------------------------------------
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-- END STEP 6 FIX
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------------------------------------------------------------
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-- ===============================
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-- STEP 4: ALTER TABLE COLUMNS
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-- ===============================
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DECLARE @Schema SYSNAME;
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DECLARE @Table SYSNAME;
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DECLARE @Column SYSNAME;
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DECLARE @OldDataType NVARCHAR(128);
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DECLARE @AlterSQL NVARCHAR(MAX);
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DECLARE @IsNullable BIT; -- track nullability
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DECLARE colCur CURSOR LOCAL FAST_FORWARD FOR
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SELECT DISTINCT
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PARSENAME(ObjectName, 2) AS SchemaName,
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PARSENAME(ObjectName, 1) AS TableName,
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ColumnName,
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ColumnDataType
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FROM DBO.TEMP2
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WHERE ObjectType = 'TABLE';
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OPEN colCur;
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FETCH NEXT FROM colCur INTO @Schema, @Table, @Column, @OldDataType;
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WHILE @@FETCH_STATUS = 0
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BEGIN
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BEGIN TRY
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-- ====================================================
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-- ? Check if column is currently NOT NULL
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-- so we can preserve it after datatype change
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-- If original was NOT NULL ? keep NOT NULL
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-- If original was NULL ? keep NULL
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-- Without this PK columns become nullable
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-- and PK recreation fails
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-- ====================================================
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SELECT @IsNullable = c.is_nullable
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FROM sys.columns c
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JOIN sys.tables t
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ON t.object_id = c.object_id
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JOIN sys.schemas s
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ON s.schema_id = t.schema_id
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WHERE s.name = @Schema
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AND t.name = @Table
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AND c.name = @Column;
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-- ? Build ALTER COLUMN with correct nullability
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SET @AlterSQL = 'ALTER TABLE ' + QUOTENAME(@Schema) + '.' + QUOTENAME(@Table) +
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' ALTER COLUMN ' + QUOTENAME(@Column) + ' ' + @NewDataType +
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-- ? Preserve NOT NULL if column was NOT NULL
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CASE WHEN @IsNullable = 0
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THEN ' NOT NULL'
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ELSE ' NULL'
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END;
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IF @DryRun = 1
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INSERT INTO MyprintLog (LogMessage, LogDate)
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VALUES (@AlterSQL, SYSDATETIME());
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ELSE
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BEGIN
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PRINT 'Attempting ALTER TABLE: ' + @AlterSQL;
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EXEC sys.sp_executesql @AlterSQL;
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insert into dbo.result(objecttype, objectname,ColumnName,ColumnDataType)
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VALUES('Table',@Table,@Column,@NewDataType)
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INSERT INTO MyprintLog (LogMessage, LogDate)
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VALUES (@AlterSQL, SYSDATETIME());
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END
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END TRY
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BEGIN CATCH
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DECLARE @CatchMsg5 NVARCHAR(MAX) = ERROR_MESSAGE();
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DECLARE @CatchXact5 SMALLINT = XACT_STATE();
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DECLARE @CatchObjName5 NVARCHAR(512) = @Schema + '.' + @Table;
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PRINT '=== ERROR [ALTER_COLUMN] === MSG: ' + @CatchMsg5;
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IF @CatchXact5 = -1
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ROLLBACK TRANSACTION;
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EXEC dbo.usp_LogError
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@Step = 'ALTER_COLUMN',
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@ObjectType = 'TABLE',
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@ObjectName = @CatchObjName5,
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@ColumnName = @Column,
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@ColumnDataType = @OldDataType,
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@ErrorMessage = @CatchMsg5,
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@SqlStatement = @AlterSQL,
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@XactState = @CatchXact5;
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--THROW;
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END CATCH
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FETCH NEXT FROM colCur INTO @Schema, @Table, @Column, @OldDataType;
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END
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CLOSE colCur;
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DEALLOCATE colCur;
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PRINT '--- RECREATING SCHEMA-BOUND VIEWS ---';
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-- ===============================
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-- Recreating schema bound views
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-- ===============================
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DECLARE @CreateSQL2 NVARCHAR(MAX);
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DECLARE @OBJNAME NVARCHAR(MAX)
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DECLARE curCreate1 CURSOR FAST_FORWARD FOR
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SELECT createscript, ViewFullName
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FROM SchemaBoundViews ;
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OPEN curCreate1;
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FETCH NEXT FROM curCreate1 INTO @CreateSQL2,@OBJNAME;
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PRINT '--- RECREATING SCHEMA-BOUND VIEWS ---';
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WHILE @@FETCH_STATUS = 0
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BEGIN
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begin try
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PRINT 'Creating view:';
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SET @CreateSQL2 = SUBSTRING(
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@CreateSQL2,
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CHARINDEX('CREATE VIEW', UPPER(@CreateSQL2)),
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LEN(@CreateSQL2)
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);
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-- ? Convert to CREATE OR ALTER so it works whether view exists or not
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SET @CreateSQL2 = REPLACE(@CreateSQL2, 'CREATE VIEW', 'CREATE OR ALTER VIEW');
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PRINT '--- RECREATING SCHEMA-BOUND VIEWS ---';
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IF @DryRun = 1
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INSERT INTO MyprintLog (LogMessage, LogDate)
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VALUES (CONCAT('-- DRYRUN ALTERING ', @OBJNAME, ' ',
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@CreateSQL2), SYSDATETIME());
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ELSE
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PRINT '== [RECREATE_SCHEMABOUNDVIEWS] === MSG: '+@OBJNAME
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EXEC sys.sp_executesql @CreateSQL2;
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INSERT INTO MyprintLog (LogMessage, LogDate)
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VALUES ('== [RECREATE_SCHEMABOUNDVIEWS] === MSG: '+@OBJNAME, SYSDATETIME());
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END TRY
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BEGIN CATCH
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DECLARE @CatchMsg10 NVARCHAR(MAX) = ERROR_MESSAGE();
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DECLARE @CatchXact10 SMALLINT = XACT_STATE();
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PRINT '=== ERROR [RECREATE_SCHEMABOUNDVIEWS] === MSG: ' + @CatchMsg10;
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IF @CatchXact10 <> -1
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EXEC dbo.usp_LogError
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@Step = 'RECREATE_OBJECT',
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@ObjectType = 'SCHEMABOUNDVIEWS',
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@ObjectName = @OBJNAME,
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@ColumnName = NULL,
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@ColumnDataType = NULL,
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@ErrorMessage = @CatchMsg10,
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@SqlStatement = @CreateSQL2,
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@XactState = @CatchXact10;
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--THROW;
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END CATCH;
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FETCH NEXT FROM curCreate1 INTO @CreateSQL2,@OBJNAME;
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END
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CLOSE curCreate1;
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DEALLOCATE curCreate1;
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