SQL Server – Como padronizar o Collation de todas as colunas do database

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Olá pessoal!
Tudo tranquilo?

Neste artigo, gostaria de compartilhar com vocês um problema que tive recentemente, o qual várias colunas, de várias tabelas de um determinado database utilizavam uma collation diferente do padrão do DB, fazendo com que ao realizar joins e condições WHERE entre colunas VARCHAR/CHAR/NVARCHAR com collations diferentes, o banco nos retorne a seguinte mensagem de erro:

Cannot resolve the collation conflict between “SQL_Latin1_General_CP1_CI_AI” and “SQL_Latin1_General_CP1_CI_AS” in the equal to operation.

O que é uma COLLATION?

O Collation nada mais é do que a forma de codificação de caracteres que um banco de dados utiliza para interpretá-los.

Um Collation é um agrupamento desses caracteres em uma determinada ordem (cada Collation tem uma ordem diferente), onde o “A” é um caracter diferente do “a”, caso o collation seja case-sensitive (diferenciação de maiúsculos e minúsculos) e o “a” é diferente do “á”, caso o collation seja Accent-Sensitive (diferenciação de acentos).

O COLLATION possui três níveis de hierarquia:
– Servidor
– Database
– Coluna

Caso o database seja criado sem especificar qual a collation que será utilizada, ele será criado com a collation do servidor (idioma do sistema operacional). Quando uma tabela é criada sem especificar o collation das colunas de texto (VARCHAR, NVARCHAR, CHAR, etc), o collate do database será utilizado como o collation das tabelas.

No SQL Server, o nome da Collation segue o seguinte padrão de nomeclatura:
SQL_CollationDesignator_CaseSensitivity_AccentSensitivity_KanatypeSensitive_WidthSensitivity

Exemplo de Collation:
SQL_Latin1_General_CP1_CS_AS

Onde:

  • CollationDesignator: Especifica as regras de agrupamento básicas usadas pelo agrupamento do Windows, onde as regras de classificação são baseadas no alfabeto ou no idioma.
  • CaseSensitivity: CI especifica que não diferencia maiúsculas de minúsculas, CS especifica que diferencia maiúsculas de minúsculas.
  • AccentSensitivity: AI especifica que não diferencia acentos, AS especifica que diferencia acento.
  • KanatypeSensitive: Omitido especifica que não faz distinção de caracteres kana, KS especifica que faz distinção de caracteres kana.
  • WidthSensitivity: Omitido especifica que não distingue largura, WS especifica que distingue largura.

Se uma coluna estiver utilizando uma COLLATION case sensitive (CS), uma query como SELECT * FROM Tabela WHERE Coluna LIKE ‘%Oracle%’ irá retornar o registro “Oracle”, mas não irá retornar o registro “oracle”.

A mesma coisa acontece com uma coluna utilizando um COLLATION accent sensitive (AS). Uma query como SELECT * FROM Tabela WHERE Coluna LIKE ‘%JOÃO%’ irá retornar o registro “João”, mas não irá retornar o registro “Joao”.

Para verificar a lista completa de Collations por região e idioma, acesse este link, lembrando que o mais utilizado no idioma Português (Brasil) é o SQL_Latin1_General_CP1_CI_AI (ou SQL_Latin1_General_CP1_CS_AS).

Para saber mais sobre o que é Collation, dê uma olhada no artigo SQL Server – Cannot resolve the collation conflict between … in the equal to operation..

Como identificar a collation padrão?

Para identificar a collation padrão de um database, basta utilizar a query abaixo:

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USE [dirceuresende]
GO
 
SELECT collation_name
FROM sys.databases
WHERE database_id = DB_ID()

Resultado:

Para identificar a collation padrão da sua instância, basta utilizar o comando abaixo:

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SELECT SERVERPROPERTY('Collation')

Resultado:

Geração da base para os testes

Para padronizar os exemplos e ajudar no entendimento prático desse artigo, vou utilizar um script simples para gerar dados de exemplo (testes):

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------------------------------------------------------------------------
-- Geração dos dados para teste
------------------------------------------------------------------------
 
CREATE TABLE dbo.Cliente (
    CPF VARCHAR(11) COLLATE Latin1_General_CS_AS NOT NULL PRIMARY KEY CLUSTERED,
    Nome VARCHAR(50)
)
 
INSERT INTO dbo.Cliente ( CPF, Nome )
VALUES ( '12345678909', 'Joãozinho' )
 
CREATE NONCLUSTERED INDEX SK01 ON dbo.Cliente(CPF) INCLUDE(Nome)
 
 
CREATE TABLE dbo.Pedido (
    Id INT IDENTITY(1,1) NOT NULL PRIMARY KEY CLUSTERED,
    Dt_Pedido DATETIME DEFAULT GETDATE(),
    Vl_Pedido MONEY,
    CPF_Cliente VARCHAR(11) COLLATE Latin1_General_CS_AS CONSTRAINT [FK_Cliente] FOREIGN KEY(CPF_Cliente) REFERENCES dbo.Cliente(CPF) NOT NULL
)
 
INSERT INTO dbo.Pedido ( Vl_Pedido, CPF_Cliente )
VALUES
(
    9.99, -- Vl_Pedido - money
    '12345678909' -- Id_Cliente - int
)
 
CREATE NONCLUSTERED INDEX SK02 ON dbo.Pedido(Id, Dt_Pedido, CPF_Cliente)

Como padronizar a collation de todas as colunas?

Caso você queira padronizar a collation de todas as colunas de um database, de modo que elas utilizem uma collation específica ou a padrão do database, desenvolvi um script que irá identificar todas as colunas que estão fora do padrão e irá executar um comando de ALTER TABLE para aplicar a alteração.

Como existem dependências (constraints, índices e foreign keys), o script irá dropar os objetos dependentes identificados, aplicar as alterações e recriar esses objetos. Por conta disso, recomendo fortemente que você teste bem antes de executar esse script em produção. De preferência, faça um backup de estrutura antes.

Script para alterar a collation de todas as colunas (e dependências) que estejam com o Collation diferente do database
Visualizar código-fonte

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SET NOCOUNT ON
 
-------------------------------------------------------------------------
-- Identifica as colunas com collation diferente do padrão do database conectado
-------------------------------------------------------------------------
 
IF (OBJECT_ID('tempdb..#Colunas') IS NOT NULL) DROP TABLE #Colunas
SELECT
    B.[object_id] AS table_object_id,
    B.[name] AS table_name,
    B.[schema_id] AS table_schema_id,
    C.[name] AS [type_name],
    D.[name] AS [schema_name],
    D.[schema_id],
    A.*,
    C.system_type_id AS type_system_type_id,
    C.user_type_id AS type_user_type_id,
    C.collation_name AS type_collation_name,
    E.collation_name AS [database_default_collation]
INTO
    #Colunas
FROM
    sys.columns                    AS A
    JOIN sys.tables                AS B ON A.[object_id] = B.[object_id]
    JOIN sys.types            AS C ON A.user_type_id = C.user_type_id
    JOIN sys.schemas                AS D ON B.[schema_id] = D.[schema_id]
    JOIN sys.databases                AS E ON E.database_id = DB_ID()
WHERE
    B.is_ms_shipped = 0
    AND A.collation_name <> E.collation_name COLLATE DATABASE_DEFAULT
  
 
IF (OBJECT_ID('tempdb..#Tabelas') IS NOT NULL) DROP table #Tabelas
SELECT DISTINCT
    table_object_id,
    table_name,
    table_schema_id,
    [schema_name]
INTO
    #Tabelas
FROM
    #Colunas
 
 
-------------------------------------------------------------------------
-- Identifica os índices que utilizam essas colunas
-------------------------------------------------------------------------
    
IF (OBJECT_ID('tempdb..#Indices') IS NOT NULL) DROP TABLE #Indices
SELECT
    A.*,
    B.[name] AS index_name,
    B.[type],
    B.[type_desc],
    B.is_unique,
    B.is_primary_key,
    B.is_unique_constraint,
    B.is_disabled
INTO
    #Indices
FROM
    #Colunas A
    JOIN sys.indexes B ON A.table_object_id = B.[object_id]
WHERE
    EXISTS(SELECT NULL FROM sys.index_columns X WHERE X.index_id = B.index_id AND X.column_id = A.column_id)
    
 
IF (OBJECT_ID('tempdb..#Indices_Alteracao') IS NOT NULL) DROP TABLE #Indices_Alteracao
SELECT DISTINCT
    table_object_id,
    table_schema_id,
    table_name,
    [schema_name],
    type_collation_name,
    database_default_collation,
    index_name,
    is_unique_constraint,
    is_primary_key
INTO
    #Indices_Alteracao
FROM
    #Indices
 
 
-------------------------------------------------------------------------
-- Gera os scripts
-------------------------------------------------------------------------
 
DECLARE
    @CmdAlterTable VARCHAR(MAX) = '',
 
    @CmdDropIndex VARCHAR(MAX) = '',
    @CmdCreateIndex VARCHAR(MAX) = '',
 
    @CmdDropFK VARCHAR(MAX) = '',
    @CmdCreateFK VARCHAR(MAX) = '',
 
    @CmdDropIndexConstraint VARCHAR(MAX) = '',
    @CmdCreateIndexConstraint VARCHAR(MAX) = '',
 
    @CmdDisableCK VARCHAR(MAX) = '',
    @CmdEnableCK VARCHAR(MAX) = '',
 
    @Fl_Debug BIT = 1
 
 
SELECT
    @CmdDropIndex += (CASE WHEN is_unique_constraint = 0 AND is_primary_key = 0 THEN 'DROP INDEX [' + index_name + '] ON [' + [schema_name] + '].[' + table_name + ']; ' ELSE '' END),
    @CmdDropIndexConstraint += (CASE WHEN is_unique_constraint = 1 OR is_primary_key = 1 THEN 'ALTER TABLE [' + [schema_name] + '].[' + table_name + '] DROP CONSTRAINT [' + index_name + ']; ' ELSE '' END),
    @CmdDisableCK += 'ALTER TABLE [' + [schema_name] + '].[' + table_name + '] NOCHECK CONSTRAINT ALL; ',
    @CmdEnableCK += 'ALTER TABLE [' + [schema_name] + '].[' + table_name + '] CHECK CONSTRAINT ALL; '
FROM
    #Indices_Alteracao
 
    
 
-------------------------------------------------------------------------
-- Identifica AS FK's que utilizam essas colunas
-------------------------------------------------------------------------
 
 
SELECT
    @CmdDropFK += N'ALTER TABLE ' + QUOTENAME(C.[name]) + '.' + QUOTENAME(B.[name]) + ' DROP CONSTRAINT ' + QUOTENAME(A.[name]) + ';'
FROM
    sys.foreign_keys AS A
    JOIN sys.tables AS B ON A.parent_object_id = B.[object_id]
    JOIN sys.schemas AS C ON B.[schema_id] = C.[schema_id]
    JOIN #Tabelas AS D ON B.[object_id] = D.table_object_id
 
 
SELECT
    @CmdCreateFK += N'ALTER TABLE ' + QUOTENAME(H.[name]) + '.' + QUOTENAME(G.[name]) + ' ADD CONSTRAINT ' + QUOTENAME(D.[name]) + ' FOREIGN KEY (' +
    STUFF((
        SELECT
            ',' + QUOTENAME(A.[name])
        FROM
            sys.columns AS A
            INNER JOIN sys.foreign_key_columns AS B ON B.parent_column_id = A.column_id AND B.parent_object_id = A.[object_id]
        WHERE
            B.constraint_object_id = D.[object_id]
        ORDER BY
            B.constraint_column_id
        FOR XML PATH(N''), TYPE).value(N'.[1]', N'nvarchar(max)'), 1, 1, N'') + ') REFERENCES ' + QUOTENAME(F.[name]) + '.' + QUOTENAME(E.[name]) + '(' +
    STUFF((
        SELECT
            ',' + QUOTENAME(C.[name])
        FROM
            sys.columns AS C
            INNER JOIN sys.foreign_key_columns AS fkc ON fkc.referenced_column_id = C.column_id AND fkc.referenced_object_id = C.[object_id]
        WHERE
            fkc.constraint_object_id = D.[object_id]
        ORDER BY
            fkc.constraint_column_id
        FOR XML PATH(N''), TYPE
    ).value(N'.[1]', N'nvarchar(max)'), 1, 1, N''
                                                                                                                                                                                                                   ) + ');'
FROM
    sys.foreign_keys AS D
    JOIN sys.tables AS E ON D.referenced_object_id = E.[object_id]
    JOIN sys.schemas AS F ON E.[schema_id] = F.[schema_id]
    JOIN sys.tables AS G ON D.parent_object_id = G.[object_id]
    JOIN sys.schemas AS H ON G.[schema_id] = H.[schema_id]
    JOIN #Tabelas AS I ON G.[object_id] = I.table_object_id
WHERE
    E.is_ms_shipped = 0
    AND G.is_ms_shipped = 0
 
 
SELECT
    @CmdCreateIndex += (CASE WHEN B.is_unique_constraint = 0 AND B.is_primary_key = 0 THEN 'CREATE ' + (CASE WHEN B.is_unique = 1 THEN 'UNIQUE ' ELSE '' END) + B.[type_desc] COLLATE DATABASE_DEFAULT + ' INDEX [' + B.[name] + '] ON [' + SCHEMA_NAME(C.[schema_id]) + '].[' + C.[name] + '] (' + E.KeyColumns + ')' + ISNULL(' INCLUDE (' + I.IncludedColumns + ')', '') + ISNULL(' WHERE ' + B.filter_definition, '') + ' WITH (' + CASE WHEN B.is_padded = 1 THEN 'PAD_INDEX = ON' ELSE 'PAD_INDEX = OFF' END + ', ' + 'FILLFACTOR = ' + CONVERT(VARCHAR(5), CASE WHEN B.fill_factor = 0 THEN 100 ELSE B.fill_factor END) + ', ' +
    'SORT_IN_TEMPDB = OFF, ' + (CASE WHEN B.[ignore_dup_key] = 1 THEN 'IGNORE_DUP_KEY = ON' ELSE 'IGNORE_DUP_KEY = OFF' END) + ', ' + (CASE WHEN F.no_recompute = 0 THEN 'STATISTICS_NORECOMPUTE = OFF' ELSE 'STATISTICS_NORECOMPUTE = ON' END) + ', ' +
    'ONLINE = OFF, DATA_COMPRESSION = PAGE, ' + (CASE WHEN B.[allow_row_locks] = 1 THEN 'ALLOW_ROW_LOCKS = ON' ELSE 'ALLOW_ROW_LOCKS = OFF' END) + ', ' + (CASE WHEN B.[allow_page_locks] = 1 THEN 'ALLOW_PAGE_LOCKS = ON' ELSE 'ALLOW_PAGE_LOCKS = OFF' END) + ') ON [' + G.[name] + ']; ' ELSE '' END),
 
    @CmdCreateIndexConstraint += (CASE WHEN B.is_unique_constraint = 1 OR B.is_primary_key = 1 THEN 'ALTER TABLE [' + A.[schema_name] + '].[' + A.table_name + '] ADD CONSTRAINT [' + A.index_name + '] ' + (CASE WHEN B.is_primary_key = 1 THEN 'PRIMARY KEY ' ELSE '' END) + (CASE WHEN B.is_unique = 1 AND B.is_primary_key = 0 THEN 'UNIQUE ' ELSE '' END) + B.[type_desc] COLLATE DATABASE_DEFAULT + ' (' + E.KeyColumns + ')' + ISNULL(' INCLUDE (' + I.IncludedColumns + ')', '') + ISNULL(' WHERE ' + B.filter_definition, '') + ' WITH (' + CASE WHEN B.is_padded = 1 THEN 'PAD_INDEX = ON' ELSE 'PAD_INDEX = OFF' END + ', ' + 'FILLFACTOR = ' + CONVERT(VARCHAR(5), CASE WHEN B.fill_factor = 0 THEN 100 ELSE B.fill_factor END) + ', ' +
    'SORT_IN_TEMPDB = OFF, ' + (CASE WHEN B.[ignore_dup_key] = 1 THEN 'IGNORE_DUP_KEY = ON' ELSE 'IGNORE_DUP_KEY = OFF' END) + ', ' + (CASE WHEN F.no_recompute = 0 THEN 'STATISTICS_NORECOMPUTE = OFF' ELSE 'STATISTICS_NORECOMPUTE = ON' END) + ', ' +
    'ONLINE = OFF, DATA_COMPRESSION = PAGE, ' + (CASE WHEN B.[allow_row_locks] = 1 THEN 'ALLOW_ROW_LOCKS = ON' ELSE 'ALLOW_ROW_LOCKS = OFF' END) + ', ' + (CASE WHEN B.[allow_page_locks] = 1 THEN 'ALLOW_PAGE_LOCKS = ON' ELSE 'ALLOW_PAGE_LOCKS = OFF' END) + ') ON [' + G.[name] + ']; ' ELSE '' END)
FROM
    #Indices_Alteracao    AS A
    JOIN sys.indexes    AS B ON A.table_object_id = B.[object_id] AND A.index_name = B.[name] COLLATE DATABASE_DEFAULT
    JOIN sys.tables     AS C ON C.[object_id] = B.[object_id]
    JOIN sys.indexes    AS D ON B.[object_id] = D.[object_id] AND B.index_id = D.index_id
    JOIN
    (
        SELECT
            *
        FROM
        (
            SELECT
                X3.[object_id],
                X3.index_id,
                STUFF((
                    SELECT
                        ', [' + X2.[name] + ']' + CASE WHEN MAX(CONVERT(INT, X1.is_descending_key)) = 1 THEN ' DESC' ELSE '' END
                    FROM
                        sys.index_columns AS X1
                        JOIN sys.columns  AS X2 ON X2.[object_id] = X1.[object_id] AND X2.column_id = X1.column_id AND X1.is_included_column = 0
                    WHERE
                        X1.[object_id] = X3.[object_id]
                        AND X1.index_id = X3.index_id
                    GROUP BY
                        X1.[object_id],
                        X2.[name],
                        X1.index_id
                    ORDER BY
                        MAX(X1.key_ordinal)
                    FOR XML PATH('')
                    ),   1, 2, ''
                ) AS KeyColumns
            FROM
                sys.index_columns AS X3
            GROUP BY
                X3.[object_id],
                X3.index_id
        ) AS X4
    )                    AS E ON B.[object_id] = E.[object_id] AND B.index_id = E.index_id
    JOIN sys.stats       AS F ON F.[object_id] = B.[object_id] AND F.stats_id = B.index_id
    JOIN sys.data_spaces AS G ON B.data_space_id = G.data_space_id
    JOIN sys.filegroups  AS H ON B.data_space_id = H.data_space_id
    LEFT JOIN
    (
        SELECT
            *
        FROM
        (
            SELECT
                X3.[object_id],
                X3.index_id,
                STUFF((
                        SELECT
                            ', [' + X2.[name] + ']'
                        FROM
                            sys.index_columns AS X1
                            JOIN sys.columns  AS X2 ON X2.[object_id] = X1.[object_id] AND X2.column_id = X1.column_id AND X1.is_included_column = 1
                        WHERE
                            X1.[object_id] = X3.[object_id]
                            AND X1.index_id = X3.index_id
                        GROUP BY
                            X1.[object_id],
                            X2.[name],
                            X1.index_id
                        FOR XML PATH('')
                    ),   1, 2, ''
                ) AS IncludedColumns
            FROM
                sys.index_columns AS X3  
            GROUP BY
                X3.[object_id],
                X3.index_id
        ) AS tmp1
        WHERE
            IncludedColumns IS NOT NULL
    ) AS I ON I.[object_id] = B.[object_id] AND I.index_id = B.index_id
 
 
SELECT
    @CmdAlterTable += 'ALTER TABLE [' + [schema_name] + '].[' + table_name + '] ALTER COLUMN [' + [name] + '] ' + UPPER([type_name]) + (CASE WHEN UPPER([type_name]) <> 'SYSNAME' THEN '(' + (CASE WHEN A.max_length > 0 THEN CAST(A.max_length AS VARCHAR(10)) ELSE 'MAX' END) + ')' ELSE '' END) + ' COLLATE ' + [database_default_collation] + ' ' + (CASE WHEN A.is_sparse = 1 THEN 'SPARSE ' ELSE '' END) + (CASE WHEN A.is_nullable = 1 THEN 'NULL' ELSE 'NOT NULL' END) + ';'
FROM
    #Colunas A
 
    
 
 
-------------------------------------------------------------------------
-- Executa os scripts
-------------------------------------------------------------------------
 
PRINT '---------- Dropando as contraints FK'
IF (NULLIF(LTRIM(RTRIM(@CmdDropFK)), '') IS NOT NULL) PRINT @CmdDropFK
IF (@Fl_Debug = 0) EXEC(@CmdDropFK)
 
PRINT '---------- Desativando as Check Contraints'
IF (NULLIF(LTRIM(RTRIM(@CmdDisableCK)), '') IS NOT NULL) PRINT @CmdDisableCK
IF (@Fl_Debug = 0) EXEC(@CmdDisableCK)
 
PRINT '---------- Dropando os índices'
IF (NULLIF(LTRIM(RTRIM(@CmdDropIndex)), '') IS NOT NULL) PRINT @CmdDropIndex
IF (@Fl_Debug = 0) EXEC(@CmdDropIndex)
 
PRINT '---------- Dropando os índices em constraints'
IF (NULLIF(LTRIM(RTRIM(@CmdDropIndexConstraint)), '') IS NOT NULL) PRINT @CmdDropIndexConstraint
IF (@Fl_Debug = 0) EXEC(@CmdDropIndexConstraint)
 
PRINT '---------- Alterando a tabela'
IF (NULLIF(LTRIM(RTRIM(@CmdAlterTable)), '') IS NOT NULL) PRINT @CmdAlterTable
IF (@Fl_Debug = 0) EXEC(@CmdAlterTable)
 
PRINT '---------- Reativando as constraints'
IF (NULLIF(LTRIM(RTRIM(@CmdEnableCK)), '') IS NOT NULL) PRINT @CmdEnableCK
IF (@Fl_Debug = 0) EXEC(@CmdEnableCK)
 
PRINT '---------- Recriando os índices'
IF (NULLIF(LTRIM(RTRIM(@CmdCreateIndex)), '') IS NOT NULL) PRINT @CmdCreateIndex
IF (@Fl_Debug = 0) EXEC(@CmdCreateIndex)
 
PRINT '---------- Recriando os índices em constraints'
IF (NULLIF(LTRIM(RTRIM(@CmdCreateIndexConstraint)), '') IS NOT NULL) PRINT @CmdCreateIndexConstraint
IF (@Fl_Debug = 0) EXEC(@CmdCreateIndexConstraint)
 
PRINT '---------- Recriando as FKs'
IF (NULLIF(LTRIM(RTRIM(@CmdCreateFK)), '') IS NOT NULL) PRINT @CmdCreateFK
IF (@Fl_Debug = 0) EXEC(@CmdCreateFK)

Script para alterar o collation de todas as colunas (e dependências) de acordo com o Collation desejado:
Visualizar código-fonte

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SET NOCOUNT ON
 
-------------------------------------------------------------------------
-- Identifica as colunas com collation diferente do desejado
-------------------------------------------------------------------------
 
DECLARE
    @Collation_Desejado VARCHAR(100) = 'SQL_Latin1_General_CP1_CI_AI' -- SELECT * FROM sys.fn_helpcollations()
 
 
IF (OBJECT_ID('tempdb..#Colunas') IS NOT NULL) DROP TABLE #Colunas
SELECT
    B.[object_id] AS table_object_id,
    B.[name] AS table_name,
    B.[schema_id] AS table_schema_id,
    C.[name] AS [type_name],
    D.[name] AS [schema_name],
    D.[schema_id],
    A.*,
    C.system_type_id AS type_system_type_id,
    C.user_type_id AS type_user_type_id,
    C.collation_name AS type_collation_name,
    E.collation_name AS [database_default_collation]
INTO
    #Colunas
FROM
    sys.columns                    AS A
    JOIN sys.tables                AS B ON A.[object_id] = B.[object_id]
    JOIN sys.types                AS C ON A.user_type_id = C.user_type_id
    JOIN sys.schemas            AS D ON B.[schema_id] = D.[schema_id]
    JOIN sys.databases            AS E ON E.database_id = DB_ID()
WHERE
    B.is_ms_shipped = 0
    AND A.collation_name <> @Collation_Desejado
  
 
IF (OBJECT_ID('tempdb..#Tabelas') IS NOT NULL) DROP table #Tabelas
SELECT DISTINCT
    table_object_id,
    table_name,
    table_schema_id,
    [schema_name]
INTO
    #Tabelas
FROM
    #Colunas
 
 
-------------------------------------------------------------------------
-- Identifica os índices que utilizam essas colunas
-------------------------------------------------------------------------
    
IF (OBJECT_ID('tempdb..#Indices') IS NOT NULL) DROP TABLE #Indices
SELECT
    A.*,
    B.[name] AS index_name,
    B.[type],
    B.[type_desc],
    B.is_unique,
    B.is_primary_key,
    B.is_unique_constraint,
    B.is_disabled
INTO
    #Indices
FROM
    #Colunas A
    JOIN sys.indexes B ON A.table_object_id = B.[object_id]
WHERE
    EXISTS(SELECT NULL FROM sys.index_columns X WHERE X.index_id = B.index_id AND X.column_id = A.column_id)
    
 
IF (OBJECT_ID('tempdb..#Indices_Alteracao') IS NOT NULL) DROP TABLE #Indices_Alteracao
SELECT DISTINCT
    table_object_id,
    table_schema_id,
    table_name,
    [schema_name],
    type_collation_name,
    database_default_collation,
    index_name,
    is_unique_constraint,
    is_primary_key
INTO
    #Indices_Alteracao
FROM
    #Indices
 
 
-------------------------------------------------------------------------
-- Gera os scripts
-------------------------------------------------------------------------
 
DECLARE
    @CmdAlterTable VARCHAR(MAX) = '',
 
    @CmdDropIndex VARCHAR(MAX) = '',
    @CmdCreateIndex VARCHAR(MAX) = '',
 
    @CmdDropFK VARCHAR(MAX) = '',
    @CmdCreateFK VARCHAR(MAX) = '',
 
    @CmdDropIndexConstraint VARCHAR(MAX) = '',
    @CmdCreateIndexConstraint VARCHAR(MAX) = '',
 
    @CmdDisableCK VARCHAR(MAX) = '',
    @CmdEnableCK VARCHAR(MAX) = '',
 
    @Fl_Debug BIT = 1
 
 
SELECT
    @CmdDropIndex += (CASE WHEN is_unique_constraint = 0 AND is_primary_key = 0 THEN 'DROP INDEX [' + index_name + '] ON [' + [schema_name] + '].[' + table_name + ']; ' ELSE '' END),
    @CmdDropIndexConstraint += (CASE WHEN is_unique_constraint = 1 OR is_primary_key = 1 THEN 'ALTER TABLE [' + [schema_name] + '].[' + table_name + '] DROP CONSTRAINT [' + index_name + ']; ' ELSE '' END),
    @CmdDisableCK += 'ALTER TABLE [' + [schema_name] + '].[' + table_name + '] NOCHECK CONSTRAINT ALL; ',
    @CmdEnableCK += 'ALTER TABLE [' + [schema_name] + '].[' + table_name + '] CHECK CONSTRAINT ALL; '
FROM
    #Indices_Alteracao
 
    
 
-------------------------------------------------------------------------
-- Identifica AS FK's que utilizam essas colunas
-------------------------------------------------------------------------
 
 
SELECT
    @CmdDropFK += N'ALTER TABLE ' + QUOTENAME(C.[name]) + '.' + QUOTENAME(B.[name]) + ' DROP CONSTRAINT ' + QUOTENAME(A.[name]) + ';'
FROM
    sys.foreign_keys AS A
    JOIN sys.tables AS B ON A.parent_object_id = B.[object_id]
    JOIN sys.schemas AS C ON B.[schema_id] = C.[schema_id]
    JOIN #Tabelas AS D ON B.[object_id] = D.table_object_id
 
 
SELECT
    @CmdCreateFK += N'ALTER TABLE ' + QUOTENAME(H.[name]) + '.' + QUOTENAME(G.[name]) + ' ADD CONSTRAINT ' + QUOTENAME(D.[name]) + ' FOREIGN KEY (' +
    STUFF((
        SELECT
            ',' + QUOTENAME(A.[name])
        FROM
            sys.columns AS A
            INNER JOIN sys.foreign_key_columns AS B ON B.parent_column_id = A.column_id AND B.parent_object_id = A.[object_id]
        WHERE
            B.constraint_object_id = D.[object_id]
        ORDER BY
            B.constraint_column_id
        FOR XML PATH(N''), TYPE).value(N'.[1]', N'nvarchar(max)'), 1, 1, N'') + ') REFERENCES ' + QUOTENAME(F.[name]) + '.' + QUOTENAME(E.[name]) + '(' +
    STUFF((
        SELECT
            ',' + QUOTENAME(C.[name])
        FROM
            sys.columns AS C
            INNER JOIN sys.foreign_key_columns AS fkc ON fkc.referenced_column_id = C.column_id AND fkc.referenced_object_id = C.[object_id]
        WHERE
            fkc.constraint_object_id = D.[object_id]
        ORDER BY
            fkc.constraint_column_id
        FOR XML PATH(N''), TYPE
    ).value(N'.[1]', N'nvarchar(max)'), 1, 1, N''
                                                                                                                                                                                                                   ) + ');'
FROM
    sys.foreign_keys AS D
    JOIN sys.tables AS E ON D.referenced_object_id = E.[object_id]
    JOIN sys.schemas AS F ON E.[schema_id] = F.[schema_id]
    JOIN sys.tables AS G ON D.parent_object_id = G.[object_id]
    JOIN sys.schemas AS H ON G.[schema_id] = H.[schema_id]
    JOIN #Tabelas AS I ON G.[object_id] = I.table_object_id
WHERE
    E.is_ms_shipped = 0
    AND G.is_ms_shipped = 0
 
 
SELECT
    @CmdCreateIndex += (CASE WHEN B.is_unique_constraint = 0 AND B.is_primary_key = 0 THEN 'CREATE ' + (CASE WHEN B.is_unique = 1 THEN 'UNIQUE ' ELSE '' END) + B.[type_desc] COLLATE DATABASE_DEFAULT + ' INDEX [' + B.[name] + '] ON [' + SCHEMA_NAME(C.[schema_id]) + '].[' + C.[name] + '] (' + E.KeyColumns + ')' + ISNULL(' INCLUDE (' + I.IncludedColumns + ')', '') + ISNULL(' WHERE ' + B.filter_definition, '') + ' WITH (' + CASE WHEN B.is_padded = 1 THEN 'PAD_INDEX = ON' ELSE 'PAD_INDEX = OFF' END + ', ' + 'FILLFACTOR = ' + CONVERT(VARCHAR(5), CASE WHEN B.fill_factor = 0 THEN 100 ELSE B.fill_factor END) + ', ' +
    'SORT_IN_TEMPDB = OFF, ' + (CASE WHEN B.[ignore_dup_key] = 1 THEN 'IGNORE_DUP_KEY = ON' ELSE 'IGNORE_DUP_KEY = OFF' END) + ', ' + (CASE WHEN F.no_recompute = 0 THEN 'STATISTICS_NORECOMPUTE = OFF' ELSE 'STATISTICS_NORECOMPUTE = ON' END) + ', ' +
    'ONLINE = OFF, DATA_COMPRESSION = PAGE, ' + (CASE WHEN B.[allow_row_locks] = 1 THEN 'ALLOW_ROW_LOCKS = ON' ELSE 'ALLOW_ROW_LOCKS = OFF' END) + ', ' + (CASE WHEN B.[allow_page_locks] = 1 THEN 'ALLOW_PAGE_LOCKS = ON' ELSE 'ALLOW_PAGE_LOCKS = OFF' END) + ') ON [' + G.[name] + ']; ' ELSE '' END),
 
    @CmdCreateIndexConstraint += (CASE WHEN B.is_unique_constraint = 1 OR B.is_primary_key = 1 THEN 'ALTER TABLE [' + A.[schema_name] + '].[' + A.table_name + '] ADD CONSTRAINT [' + A.index_name + '] ' + (CASE WHEN B.is_primary_key = 1 THEN 'PRIMARY KEY ' ELSE '' END) + (CASE WHEN B.is_unique = 1 AND B.is_primary_key = 0 THEN 'UNIQUE ' ELSE '' END) + B.[type_desc] COLLATE DATABASE_DEFAULT + ' (' + E.KeyColumns + ')' + ISNULL(' INCLUDE (' + I.IncludedColumns + ')', '') + ISNULL(' WHERE ' + B.filter_definition, '') + ' WITH (' + CASE WHEN B.is_padded = 1 THEN 'PAD_INDEX = ON' ELSE 'PAD_INDEX = OFF' END + ', ' + 'FILLFACTOR = ' + CONVERT(VARCHAR(5), CASE WHEN B.fill_factor = 0 THEN 100 ELSE B.fill_factor END) + ', ' +
    'SORT_IN_TEMPDB = OFF, ' + (CASE WHEN B.[ignore_dup_key] = 1 THEN 'IGNORE_DUP_KEY = ON' ELSE 'IGNORE_DUP_KEY = OFF' END) + ', ' + (CASE WHEN F.no_recompute = 0 THEN 'STATISTICS_NORECOMPUTE = OFF' ELSE 'STATISTICS_NORECOMPUTE = ON' END) + ', ' +
    'ONLINE = OFF, DATA_COMPRESSION = PAGE, ' + (CASE WHEN B.[allow_row_locks] = 1 THEN 'ALLOW_ROW_LOCKS = ON' ELSE 'ALLOW_ROW_LOCKS = OFF' END) + ', ' + (CASE WHEN B.[allow_page_locks] = 1 THEN 'ALLOW_PAGE_LOCKS = ON' ELSE 'ALLOW_PAGE_LOCKS = OFF' END) + ') ON [' + G.[name] + ']; ' ELSE '' END)
FROM
    #Indices_Alteracao    AS A
    JOIN sys.indexes    AS B ON A.table_object_id = B.[object_id] AND A.index_name = B.[name] COLLATE DATABASE_DEFAULT
    JOIN sys.tables     AS C ON C.[object_id] = B.[object_id]
    JOIN sys.indexes    AS D ON B.[object_id] = D.[object_id] AND B.index_id = D.index_id
    JOIN
    (
        SELECT
            *
        FROM
        (
            SELECT
                X3.[object_id],
                X3.index_id,
                STUFF((
                    SELECT
                        ', [' + X2.[name] + ']' + CASE WHEN MAX(CONVERT(INT, X1.is_descending_key)) = 1 THEN ' DESC' ELSE '' END
                    FROM
                        sys.index_columns AS X1
                        JOIN sys.columns  AS X2 ON X2.[object_id] = X1.[object_id] AND X2.column_id = X1.column_id AND X1.is_included_column = 0
                    WHERE
                        X1.[object_id] = X3.[object_id]
                        AND X1.index_id = X3.index_id
                    GROUP BY
                        X1.[object_id],
                        X2.[name],
                        X1.index_id
                    ORDER BY
                        MAX(X1.key_ordinal)
                    FOR XML PATH('')
                    ),   1, 2, ''
                ) AS KeyColumns
            FROM
                sys.index_columns AS X3
            GROUP BY
                X3.[object_id],
                X3.index_id
        ) AS X4
    )                    AS E ON B.[object_id] = E.[object_id] AND B.index_id = E.index_id
    JOIN sys.stats       AS F ON F.[object_id] = B.[object_id] AND F.stats_id = B.index_id
    JOIN sys.data_spaces AS G ON B.data_space_id = G.data_space_id
    JOIN sys.filegroups  AS H ON B.data_space_id = H.data_space_id
    LEFT JOIN
    (
        SELECT
            *
        FROM
        (
            SELECT
                X3.[object_id],
                X3.index_id,
                STUFF((
                        SELECT
                            ', [' + X2.[name] + ']'
                        FROM
                            sys.index_columns AS X1
                            JOIN sys.columns  AS X2 ON X2.[object_id] = X1.[object_id] AND X2.column_id = X1.column_id AND X1.is_included_column = 1
                        WHERE
                            X1.[object_id] = X3.[object_id]
                            AND X1.index_id = X3.index_id
                        GROUP BY
                            X1.[object_id],
                            X2.[name],
                            X1.index_id
                        FOR XML PATH('')
                    ),   1, 2, ''
                ) AS IncludedColumns
            FROM
                sys.index_columns AS X3  
            GROUP BY
                X3.[object_id],
                X3.index_id
        ) AS tmp1
        WHERE
            IncludedColumns IS NOT NULL
    ) AS I ON I.[object_id] = B.[object_id] AND I.index_id = B.index_id
 
 
SELECT
    @CmdAlterTable += 'ALTER TABLE [' + [schema_name] + '].[' + table_name + '] ALTER COLUMN [' + [name] + '] ' + UPPER([type_name]) + (CASE WHEN UPPER([type_name]) <> 'SYSNAME' THEN '(' + (CASE WHEN A.max_length > 0 THEN CAST(A.max_length AS VARCHAR(10)) ELSE 'MAX' END) + ')' ELSE '' END) + ' COLLATE ' + @Collation_Desejado + ' ' + (CASE WHEN A.is_sparse = 1 THEN 'SPARSE ' ELSE '' END) + (CASE WHEN A.is_nullable = 1 THEN 'NULL' ELSE 'NOT NULL' END) + ';'
FROM
    #Colunas A
 
    
 
 
-------------------------------------------------------------------------
-- Executa os scripts
-------------------------------------------------------------------------
 
PRINT '---------- Dropando as contraints FK'
IF (NULLIF(LTRIM(RTRIM(@CmdDropFK)), '') IS NOT NULL) PRINT @CmdDropFK
IF (@Fl_Debug = 0) EXEC(@CmdDropFK)
 
PRINT '---------- Desativando as Check Contraints'
IF (NULLIF(LTRIM(RTRIM(@CmdDisableCK)), '') IS NOT NULL) PRINT @CmdDisableCK
IF (@Fl_Debug = 0) EXEC(@CmdDisableCK)
 
PRINT '---------- Dropando os índices'
IF (NULLIF(LTRIM(RTRIM(@CmdDropIndex)), '') IS NOT NULL) PRINT @CmdDropIndex
IF (@Fl_Debug = 0) EXEC(@CmdDropIndex)
 
PRINT '---------- Dropando os índices em constraints'
IF (NULLIF(LTRIM(RTRIM(@CmdDropIndexConstraint)), '') IS NOT NULL) PRINT @CmdDropIndexConstraint
IF (@Fl_Debug = 0) EXEC(@CmdDropIndexConstraint)
 
PRINT '---------- Alterando a tabela'
IF (NULLIF(LTRIM(RTRIM(@CmdAlterTable)), '') IS NOT NULL) PRINT @CmdAlterTable
IF (@Fl_Debug = 0) EXEC(@CmdAlterTable)
 
PRINT '---------- Reativando as constraints'
IF (NULLIF(LTRIM(RTRIM(@CmdEnableCK)), '') IS NOT NULL) PRINT @CmdEnableCK
IF (@Fl_Debug = 0) EXEC(@CmdEnableCK)
 
PRINT '---------- Recriando os índices'
IF (NULLIF(LTRIM(RTRIM(@CmdCreateIndex)), '') IS NOT NULL) PRINT @CmdCreateIndex
IF (@Fl_Debug = 0) EXEC(@CmdCreateIndex)
 
PRINT '---------- Recriando os índices em constraints'
IF (NULLIF(LTRIM(RTRIM(@CmdCreateIndexConstraint)), '') IS NOT NULL) PRINT @CmdCreateIndexConstraint
IF (@Fl_Debug = 0) EXEC(@CmdCreateIndexConstraint)
 
PRINT '---------- Recriando as FKs'
IF (NULLIF(LTRIM(RTRIM(@CmdCreateFK)), '') IS NOT NULL) PRINT @CmdCreateFK
IF (@Fl_Debug = 0) EXEC(@CmdCreateFK)

Resultado:

Caso o script identifique muitas colunas para alterar e a saída do PRINT esteja ficando cortada por causa do tamanho das strings geradas, você pode utilizar a função fncSplitTexto, que disponibilizei no post Como quebrar um string em uma tabela de substrings utilizando um delimitador no SQL Server e substituir o final do script por esse trecho aqui:

Transact-SQL
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-------------------------------------------------------------------------
-- Executa os scripts
-------------------------------------------------------------------------
 
PRINT '---------- Dropando as contraints FK'
IF (NULLIF(LTRIM(RTRIM(@CmdDropFK)), '') IS NOT NULL) SELECT * FROM dirceuresende.dbo.fncSplitTexto(@CmdDropFK, ';')
IF (@Fl_Debug = 0) EXEC(@CmdDropFK)
 
PRINT '---------- Desativando as Check Contraints'
IF (NULLIF(LTRIM(RTRIM(@CmdDisableCK)), '') IS NOT NULL) SELECT * FROM dirceuresende.dbo.fncSplitTexto(@CmdDisableCK, ';')
IF (@Fl_Debug = 0) EXEC(@CmdDisableCK)
 
PRINT '---------- Dropando os índices'
IF (NULLIF(LTRIM(RTRIM(@CmdDropIndex)), '') IS NOT NULL) SELECT * FROM dirceuresende.dbo.fncSplitTexto(@CmdDropIndex, ';')
IF (@Fl_Debug = 0) EXEC(@CmdDropIndex)
 
PRINT '---------- Dropando os índices em constraints'
IF (NULLIF(LTRIM(RTRIM(@CmdDropIndexConstraint)), '') IS NOT NULL) SELECT * FROM dirceuresende.dbo.fncSplitTexto(@CmdDropIndexConstraint, ';')
IF (@Fl_Debug = 0) EXEC(@CmdDropIndexConstraint)
 
PRINT '---------- Alterando a tabela'
IF (NULLIF(LTRIM(RTRIM(@CmdAlterTable)), '') IS NOT NULL) SELECT * FROM dirceuresende.dbo.fncSplitTexto(@CmdAlterTable, ';')
IF (@Fl_Debug = 0) EXEC(@CmdAlterTable)
 
PRINT '---------- Reativando as constraints'
IF (NULLIF(LTRIM(RTRIM(@CmdEnableCK)), '') IS NOT NULL) SELECT * FROM dirceuresende.dbo.fncSplitTexto(@CmdEnableCK, ';')
IF (@Fl_Debug = 0) EXEC(@CmdEnableCK)
 
PRINT '---------- Recriando os índices'
IF (NULLIF(LTRIM(RTRIM(@CmdCreateIndex)), '') IS NOT NULL) SELECT * FROM dirceuresende.dbo.fncSplitTexto(@CmdCreateIndex, ';')
IF (@Fl_Debug = 0) EXEC(@CmdCreateIndex)
 
PRINT '---------- Recriando os índices em constraints'
IF (NULLIF(LTRIM(RTRIM(@CmdCreateIndexConstraint)), '') IS NOT NULL) SELECT * FROM dirceuresende.dbo.fncSplitTexto(@CmdCreateIndexConstraint, ';')
IF (@Fl_Debug = 0) EXEC(@CmdCreateIndexConstraint)
 
PRINT '---------- Recriando as FKs'
IF (NULLIF(LTRIM(RTRIM(@CmdCreateFK)), '') IS NOT NULL) SELECT * FROM dirceuresende.dbo.fncSplitTexto(@CmdCreateFK, ';')
IF (@Fl_Debug = 0) EXEC(@CmdCreateFK)

Resultado:

Espero que tenham gostado desse post e até a próxima!
PS: Lembre de fazer o backup e testar BASTANTE se você planeja aplicar esse script em Produção.

Em caso de dúvidas ou problemas, deixe aqui nos comentários.

Tags:

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5 Responses

  1. Aldemir Fernandes disse:
    25 de abril de 2019 às 01:37

    Olá Dirceu.

    Agradeço demais esse post. Porém estou com um problema. Quando executo seu script, ele executa certinho, porém não altera o collation das colunas.

    No resultado, aponta como o script executado com sucesso.

    Tem ideia do que pode ser?

    Agradeço demais a ajuda.

    Responder
  2. Kelvin Faria disse:
    24 de setembro de 2018 às 15:22

    Olá Dirceu, boa tarde!

    Muito legal o post, porém tenho uma dúvida, no meu caso existem mais de 43mil colunas que precisam ser alteradas, portanto ao rodar o script o resultado do script ultrapassa o máximo permitido pelo campo “message” do management studio e acabo não vendo todos os comandos.

    Tem alguma solução?
    Obrigado desde já!

    Responder

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