Fala pessoal,
Nesse post eu gostaria de mostrar para vocês como gerar um script para exportar todos os índices do banco de dados, muito útil para migrações e configurações de novos ambientes.
Como gerar um script com todos os índices do banco de dados utilizando T-SQL
Uma das formas mais rápidas e práticas, é utilizando o script abaixo, que irá gerar um select com todos os índices que existem na base.
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SELECT
DB_NAME() AS [database_name],
sc.[name] + N'.' + t.[name] AS table_name,
si.index_id,
si.[name] AS index_name,
si.[type_desc],
(SELECT MAX([value].[user_reads])
FROM (VALUES (last_user_seek), (last_user_scan), (last_user_lookup)) AS value(user_reads)) AS last_user_read,
[stat].[last_user_update],
CASE si.index_id WHEN 0 THEN N'/* No create statement (Heap) */'
ELSE
CASE [si].[is_primary_key] WHEN 1 THEN
N'ALTER TABLE ' + QUOTENAME(sc.name) + N'.' + QUOTENAME(t.name) + N' ADD CONSTRAINT ' + QUOTENAME(si.name) + N' PRIMARY KEY ' +
CASE WHEN si.index_id > 1 THEN N'NON' ELSE N'' END + N'CLUSTERED '
ELSE N'CREATE ' +
CASE WHEN [si].[is_unique] = 1 then N'UNIQUE ' ELSE N'' END +
CASE WHEN si.index_id > 1 THEN N'NON' ELSE N'' END + N'CLUSTERED ' + (CASE WHEN si.[type] IN (4, 5) THEN 'COLUMNSTORE ' ELSE '' END) +
N'INDEX ' + QUOTENAME(si.name) + N' ON ' + QUOTENAME(sc.name) + N'.' + QUOTENAME(t.name) + N' '
END +
/* key def */ (CASE WHEN si.[type] IN (0, 1, 2) THEN N'(' + [keys].[key_definition] + N')' ELSE '' END) +
/* includes */ (CASE WHEN si.[type] IN (0, 1, 2) THEN CASE WHEN [includes].[include_definition] IS NOT NULL THEN
N' INCLUDE (' + [includes].[include_definition] + N')'
ELSE N''
END ELSE '' END) +
/* filters */ CASE WHEN [si].[filter_definition] IS NOT NULL THEN
N' WHERE ' + [si].[filter_definition] ELSE N''
END +
/* with clause - compression goes here */
CASE WHEN [row_compression_clause].[row_compression_partition_list] IS NOT NULL OR [page_compression_clause].[page_compression_partition_list] IS NOT NULL
THEN N' WITH (' +
CASE WHEN [row_compression_clause].[row_compression_partition_list] IS NOT NULL THEN
N'DATA_COMPRESSION = ROW ' + CASE WHEN psc.name IS NULL THEN N'' ELSE + N' ON PARTITIONS (' + [row_compression_clause].[row_compression_partition_list] + N')' END
ELSE N'' END +
CASE WHEN [row_compression_clause].[row_compression_partition_list] IS NOT NULL AND [page_compression_clause].[page_compression_partition_list] IS NOT NULL THEN N', ' ELSE N'' END +
CASE WHEN [page_compression_clause].[page_compression_partition_list] IS NOT NULL THEN
N'DATA_COMPRESSION = PAGE ' + CASE WHEN psc.name IS NULL THEN N'' ELSE + N' ON PARTITIONS (' + [page_compression_clause].[page_compression_partition_list] + N')' END
ELSE N'' END
+ N')'
ELSE N''
END +
/* ON where? filegroup? partition scheme? */
' ON ' + CASE WHEN psc.name is null
THEN ISNULL(QUOTENAME(fg.name),N'')
ELSE psc.name + N' (' + [partitioning_column].[column_name] + N')'
END
+ N';'
END AS index_create_statement,
[partition_sums].[reserved_in_row_GB],
[partition_sums].[reserved_LOB_GB],
[partition_sums].[row_count],
[stat].[user_seeks],
[stat].[user_scans],
[stat].[user_lookups],
[stat].[user_updates] AS queries_that_modified,
[partition_sums].[partition_count],
[si].[allow_page_locks],
[si].[allow_row_locks],
[si].[is_hypothetical],
[si].[has_filter],
[si].[fill_factor],
[si].[is_unique],
ISNULL(pf.name, '/* Not partitioned */') AS partition_function,
ISNULL(psc.name, fg.name) AS partition_scheme_or_filegroup,
t.create_date AS table_created_date,
t.modify_date AS table_modify_date
FROM
sys.indexes AS si
JOIN sys.tables AS t ON si.[object_id] = t.[object_id]
JOIN sys.schemas AS sc ON t.[schema_id] = sc.[schema_id]
LEFT JOIN sys.dm_db_index_usage_stats AS stat ON [stat].[database_id] = DB_ID() AND si.[object_id] = stat.[object_id] AND si.index_id=stat.index_id
LEFT JOIN sys.partition_schemes AS psc ON si.data_space_id=psc.data_space_id
LEFT JOIN sys.partition_functions AS pf ON psc.function_id=pf.function_id
LEFT JOIN sys.filegroups AS fg ON si.data_space_id=fg.data_space_id
/* Key list */
OUTER APPLY (
SELECT STUFF ((
SELECT
N', ' + QUOTENAME([c].[name]) + CASE [ic].[is_descending_key] WHEN 1 THEN N' DESC' ELSE N'' END
FROM
sys.index_columns AS ic
JOIN
sys.columns AS c ON ic.column_id=c.column_id and ic.[object_id] = c.[object_id]
WHERE
ic.[object_id] = si.[object_id]
AND [ic].[index_id]=si.index_id
AND [ic].[key_ordinal] > 0
ORDER BY
[ic].[key_ordinal]
FOR
XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)'),1,2,''
)
) AS keys ( key_definition )
/* Partitioning Ordinal */
OUTER APPLY (
SELECT
MAX(QUOTENAME([c].[name])) AS column_name
FROM
sys.index_columns AS ic
JOIN sys.columns AS c ON ic.column_id=c.column_id and ic.[object_id]=c.[object_id]
WHERE
ic.[object_id] = si.[object_id]
AND [ic].[index_id]=si.index_id
AND [ic].[partition_ordinal] = 1
) AS partitioning_column
/* Include list */
OUTER APPLY (
SELECT STUFF ((
SELECT
N', ' + QUOTENAME([c].[name])
FROM
sys.index_columns AS ic
JOIN sys.columns AS c ON ic.column_id=c.column_id AND ic.[object_id]=c.[object_id]
WHERE
ic.[object_id] = si.[object_id]
AND [ic].[index_id]=si.index_id
AND [ic].[is_included_column] = 1
ORDER BY
[c].[name]
FOR
XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)'),1,2,''
)
) AS includes ( include_definition )
/* Partitions */
OUTER APPLY (
SELECT
COUNT(*) AS partition_count,
CAST(SUM([ps].[in_row_reserved_page_count])*8./1024./1024. AS NUMERIC(32,1)) AS reserved_in_row_GB,
CAST(SUM([ps].[lob_reserved_page_count])*8./1024./1024. AS NUMERIC(32,1)) AS reserved_LOB_GB,
SUM([ps].[row_count]) AS row_count
FROM
sys.partitions AS p
JOIN sys.dm_db_partition_stats AS ps ON p.[partition_id]=ps.[partition_id]
WHERE
p.[object_id] = si.[object_id]
AND p.index_id=si.index_id
) AS partition_sums
/* row compression list by partition */
OUTER APPLY (
SELECT STUFF ((
SELECT
N', ' + CAST([p].[partition_number] AS VARCHAR(32))
FROM
sys.partitions AS p
WHERE
[p].[object_id] = si.[object_id]
AND [p].[index_id]=si.index_id
AND [p].[data_compression] = 1 -- row compression
ORDER BY
[p].[partition_number]
FOR
XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)'),1,2,''
)
) AS row_compression_clause ( row_compression_partition_list )
/* data compression list by partition */
OUTER APPLY (
SELECT STUFF ((
SELECT
N', ' + CAST([p].[partition_number] AS VARCHAR(32))
FROM
sys.partitions AS p
WHERE
[p].[object_id] = si.[object_id]
AND [p].[index_id]=si.index_id
AND [p].[data_compression] = 2 -- page compression
ORDER BY
[p].[partition_number]
FOR
XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)'),1,2,''
)
) AS page_compression_clause ( page_compression_partition_list )
WHERE
si.type IN (0,1,2,4,5) /* heap, clustered, nonclustered */
ORDER BY
table_name, si.index_id
OPTION (RECOMPILE);
GOResultado:
Como gerar um script com todos os índices do banco de dados utilizando o SSMS
Uma das formas mais fáceis de exportar todos os índices do banco para um script SQL, é utilizando o próprio SQL Server Management Studio (SSMS).
Para fazer isso, abra o “Object Explorer”, clique com o botão direito no banco de dados que deseja exportar os índices e selecione a opção “Tasks” e depois “Generate Scripts…”
Nessa tela que abriu, você pode avançar, e, opcionalmente, marcar a opção “Do not show this page again”, para pular essa tela de introdução na próxima vez que você for abrir esse assistente.
Na próxima tela, você pode utilizar a opção padrão “Script entire database and all database objects”, para exportar todos os objetos do banco de dados, ou clicar na opção “Select specific database objects” para selecionar apenas os objetos que você quer.
Para apenas exportar os índices, eu escolhi a opção “Select specific database objects” e marquei todas as tabelas.
Na tela abaixo, clique no botão “Advanced”, para exibir algumas opções interessantes no script gerado.
Lembre-se de ativar as opções “Script Full-Text Indexes”, “Script Indexes” e “Script Data Compression options” para uma exportação bem sucedida.
Uma opção que pode ser muito útil é a “Types of data to script”. A opção padrão é a “Schema only”, que exporta somente a definição dos objetos. Além desta opção, você pode escolher “Data only”, que exporta somente os dados (bom para fazer dump de apenas algumas tabelas) e “Schema and data”, que faz o backup tanto da definição dos objetos quanto dos dados.
Nesta tela, você pode escolher o destino do script gerado, que pode ser um notebook Jupyter, um script SQL salvo no disco, a área de trabalho ou uma nova aba no SSMS. Eu escolhi a última opção.
A próxima tela vai mostrar um resumo das ações e configurações que você selecionou nos passos anteriores
Pronto! Script de criação das tabelas e dos índices gerado com sucesso.
E é isso aí, pessoal!
Espero que tenham gostado dessa dica e até a próxima!
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