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Update column-store-indexes.sql

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This commit is contained in:
Alex Bochkov
2023-12-21 11:01:15 -07:00
committed by GitHub
parent 5c4ec4c984
commit ec0c2bf855
1 changed files with 9 additions and 5 deletions
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14
QueryTemplates/Common Scripts/column-store-indexes.sql
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@@ -1,3 +1,4 @@
/*
-- select all columnstore indexes
SELECT
OBJECT_SCHEMA_NAME(OBJECT_ID) SchemaName,
@@ -18,19 +19,22 @@ SELECT *
FROM sys.dm_db_column_store_row_group_physical_stats
WHERE object_id = object_id('TableName')
ORDER BY row_group_id;
*/
-- get some stats around CIX - helps to see which partitions need to be rebuilt
SELECT OBJECT_SCHEMA_NAME(ps.[object_id]) AS schemaName,
OBJECT_NAME(ps.[object_id]) AS tableName,
ps.partition_number,
p.data_compression_desc,
FORMAT(SUM(ps.row_group_id), 'N0') AS row_group_count,
FORMAT(SUM(ps.total_rows), 'N0') AS row_count,
FORMAT(SUM(ps.deleted_rows), 'N0') AS deleted_rows,
FORMAT(SUM(ps.size_in_bytes), 'N0') AS size_in_bytes,
FORMAT(SUM(ps.size_in_bytes) / 1024 / 1024, 'N0') AS size_in_mbytes,
FORMAT(SUM(ps.size_in_bytes) / sum(total_rows), 'N0') AS size_per_row,
CONCAT('ALTER INDEX [', i.[name], '] ON ', OBJECT_SCHEMA_NAME(ps.[object_id]), '.', OBJECT_NAME(ps.[object_id]), ' REBUILD PARTITION = ', ps.partition_number, ' WITH (DATA_COMPRESSION = COLUMNSTORE, ONLINE = ON, SORT_IN_TEMPDB = ON, /* MAXDOP = 8 */);
CONCAT('ALTER INDEX [', i.[name], '] ON ', OBJECT_SCHEMA_NAME(ps.[object_id]), '.', OBJECT_NAME(ps.[object_id]),
' REBUILD PARTITION = ', ps.partition_number, ' WITH (DATA_COMPRESSION = COLUMNSTORE, ONLINE = ON, SORT_IN_TEMPDB = ON /*, MAXDOP = 8 */);
GO') AS rebuiltCommand
FROM sys.dm_db_column_store_row_group_physical_stats AS ps
INNER JOIN sys.indexes AS i ON ps.[object_id] = i.[object_id] AND ps.index_id = i.index_id
GROUP BY ps.[object_id], ps.partition_number, i.[name]
ORDER BY ps.partition_number;
INNER JOIN sys.partitions p ON ps.partition_number = p.partition_number AND ps.[object_id] = p.[object_id] AND ps.index_id = p.index_id
GROUP BY ps.[object_id], ps.partition_number, p.data_compression_desc, i.[name]
ORDER BY schemaName, tableName, ps.partition_number;