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34 lines
1.2 KiB
SQL
34 lines
1.2 KiB
SQL
-- select all columnstore indexes
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SELECT
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OBJECT_SCHEMA_NAME(OBJECT_ID) SchemaName,
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OBJECT_NAME(OBJECT_ID) TableName,
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i.name AS IndexName,
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i.type_desc IndexType
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FROM sys.indexes AS i
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WHERE is_hypothetical = 0
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AND i.index_id <> 0
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AND i.type_desc IN ('CLUSTERED COLUMNSTORE','NONCLUSTERED COLUMNSTORE');
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-- maintenance
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ALTER INDEX [IndexName] ON [TableName] REORGANIZE WITH (COMPRESS_ALL_ROW_GROUPS = ON);
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ALTER INDEX [IndexName] ON [TableName] REBUILD PARTITION = ALL WITH (DATA_COMPRESSION = COLUMNSTORE_ARCHIVE, MAXDOP = 1);
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-- get row group physical stats
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SELECT *
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FROM sys.dm_db_column_store_row_group_physical_stats
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WHERE object_id = object_id('TableName')
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ORDER BY row_group_id;
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-- get some stats around CIX - helps to see which partitions need to be rebuilt
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SELECT object_name(object_id)
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,partition_number
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,FORMAT(sum(row_group_id), 'N0') AS row_group_count
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,FORMAT(sum(total_rows), 'N0') AS row_count
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,FORMAT(sum(size_in_bytes), 'N0') AS size_in_bytes
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,FORMAT(sum(size_in_bytes) / sum(total_rows), 'N0') AS size_per_row
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FROM sys.dm_db_column_store_row_group_physical_stats
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WHERE object_name(object_id) LIKE ' table name %'
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GROUP BY object_name(object_id)
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,partition_number
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ORDER BY partition_number;
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