azure-synapse - 查询 Synapse Analytics 中所有表的大小

Question

我希望能够根据表的大小查询和过滤表

我已经知道 sp_spaceused，但它一次显示一个表的大小

Answer 1

这是根据 Synapse 建议调整为使用的视图sys.pdw_permanent_table_mappings

SELECT two_part_name, SUM( row_count ) AS row_count, SUM( reserved_space_GB ) AS reserved_space_GB
FROM dbo.vTableSizes
GROUP BY two_part_name
ORDER BY reserved_space_GB DESC;

风景：

ALTER VIEW dbo.vTableSizes
AS
WITH base
AS
(
SELECT
 GETDATE()                                                             AS  [execution_time]
, DB_NAME()                                                            AS  [database_name]
, s.name                                                               AS  [schema_name]
, t.name                                                               AS  [table_name]
, QUOTENAME(s.name)+'.'+QUOTENAME(t.name)                              AS  [two_part_name]
, nt.[name]                                                            AS  [node_table_name]
, ROW_NUMBER() OVER(PARTITION BY nt.[name] ORDER BY (SELECT NULL))     AS  [node_table_name_seq]
, tp.[distribution_policy_desc]                                        AS  [distribution_policy_name]
, c.[name]                                                             AS  [distribution_column]
, nt.[distribution_id]                                                 AS  [distribution_id]
, i.[type]                                                             AS  [index_type]
, i.[type_desc]                                                        AS  [index_type_desc]
, nt.[pdw_node_id]                                                     AS  [pdw_node_id]
, pn.[type]                                                            AS  [pdw_node_type]
, pn.[name]                                                            AS  [pdw_node_name]
, di.name                                                              AS  [dist_name]
, di.position                                                          AS  [dist_position]
, nps.[partition_number]                                               AS  [partition_nmbr]
, nps.[reserved_page_count]                                            AS  [reserved_space_page_count]
, nps.[reserved_page_count] - nps.[used_page_count]                    AS  [unused_space_page_count]
, nps.[in_row_data_page_count]
    + nps.[row_overflow_used_page_count]
    + nps.[lob_used_page_count]                                        AS  [data_space_page_count]
, nps.[reserved_page_count]
 - (nps.[reserved_page_count] - nps.[used_page_count])
 - ([in_row_data_page_count]
         + [row_overflow_used_page_count]+[lob_used_page_count])       AS  [index_space_page_count]
, nps.[row_count]                                                      AS  [row_count]
from
    sys.schemas s
INNER JOIN sys.tables t
    ON s.[schema_id] = t.[schema_id]
INNER JOIN sys.indexes i
    ON  t.[object_id] = i.[object_id]
    AND i.[index_id] <= 1
INNER JOIN sys.pdw_table_distribution_properties tp
    ON t.[object_id] = tp.[object_id]
INNER JOIN sys.pdw_permanent_table_mappings tm
    ON t.[object_id] = tm.[object_id]
INNER JOIN sys.pdw_nodes_tables nt
    ON tm.[physical_name] = nt.[name]
INNER JOIN sys.dm_pdw_nodes pn
    ON  nt.[pdw_node_id] = pn.[pdw_node_id]
INNER JOIN sys.pdw_distributions di
    ON  nt.[distribution_id] = di.[distribution_id]
INNER JOIN sys.dm_pdw_nodes_db_partition_stats nps
    ON nt.[object_id] = nps.[object_id]
    AND nt.[pdw_node_id] = nps.[pdw_node_id]
    AND nt.[distribution_id] = nps.[distribution_id]
LEFT OUTER JOIN (select * from sys.pdw_column_distribution_properties where distribution_ordinal = 1) cdp
    ON t.[object_id] = cdp.[object_id]
LEFT OUTER JOIN sys.columns c
    ON cdp.[object_id] = c.[object_id]
    AND cdp.[column_id] = c.[column_id]
WHERE pn.[type] = 'COMPUTE'
)
, size
AS
(
SELECT
   [execution_time]
,  [database_name]
,  [schema_name]
,  [table_name]
,  [two_part_name]
,  [node_table_name]
,  [node_table_name_seq]
,  [distribution_policy_name]
,  [distribution_column]
,  [distribution_id]
,  [index_type]
,  [index_type_desc]
,  [pdw_node_id]
,  [pdw_node_type]
,  [pdw_node_name]
,  [dist_name]
,  [dist_position]
,  [partition_nmbr]
,  [reserved_space_page_count]
,  [unused_space_page_count]
,  [data_space_page_count]
,  [index_space_page_count]
,  [row_count]
,  ([reserved_space_page_count] * 8.0)                                 AS [reserved_space_KB]
,  ([reserved_space_page_count] * 8.0)/1000                            AS [reserved_space_MB]
,  ([reserved_space_page_count] * 8.0)/1000000                         AS [reserved_space_GB]
,  ([reserved_space_page_count] * 8.0)/1000000000                      AS [reserved_space_TB]
,  ([unused_space_page_count]   * 8.0)                                 AS [unused_space_KB]
,  ([unused_space_page_count]   * 8.0)/1000                            AS [unused_space_MB]
,  ([unused_space_page_count]   * 8.0)/1000000                         AS [unused_space_GB]
,  ([unused_space_page_count]   * 8.0)/1000000000                      AS [unused_space_TB]
,  ([data_space_page_count]     * 8.0)                                 AS [data_space_KB]
,  ([data_space_page_count]     * 8.0)/1000                            AS [data_space_MB]
,  ([data_space_page_count]     * 8.0)/1000000                         AS [data_space_GB]
,  ([data_space_page_count]     * 8.0)/1000000000                      AS [data_space_TB]
,  ([index_space_page_count]  * 8.0)                                   AS [index_space_KB]
,  ([index_space_page_count]  * 8.0)/1000                              AS [index_space_MB]
,  ([index_space_page_count]  * 8.0)/1000000                           AS [index_space_GB]
,  ([index_space_page_count]  * 8.0)/1000000000                        AS [index_space_TB]
FROM base
)
SELECT *
FROM size
;

Answer 2

记录在案的DMV 查询允许您获取所有表格大小的报告。