sys.query_store_query_variant (Transact-SQL)
適用於:SQL Server 2022 (16.x)
包含原始參數化查詢(也稱為父查詢)、發送器計劃及其子查詢變體之間的父子關聯性相關信息。 此目錄檢視可讓您檢視與發送器相關聯的所有查詢變體,以及原始參數化查詢。 查詢變數的query_hash值會與從sys.query_store_query目錄檢視中檢視的值相同,當與sys.query_store_query_variant和sys.query_store_runtime_stats目錄檢視聯結時,匯總資源使用量統計數據只能根據其輸入值來取得。
資料行名稱 | 資料類型 | 描述 |
---|---|---|
query_variant_query_id | bigint | 主索引鍵。 參數化敏感性查詢變體的標識碼。 |
parent_query_id | bigint | 原始參數化查詢的標識碼。 |
dispatcher_plan_id | bigint | 參數敏感性計劃優化發送器計劃的標識碼。 |
備註
由於多個查詢變體可以與一個發送器計劃相關聯,因此會有多個屬於查詢變體的計劃,最終會新增至父查詢的整體資源使用量統計數據。 查詢變體的發送器計劃不會在 查詢存放區 中產生任何運行時間統計數據,這會導致收集整體統計數據時,現有的 查詢存放區 查詢不再足夠,除非包含其他聯結至query_store_query_variant檢視。
權限
需要 VIEW DATABASE STATE 許可權。
範例
檢視 查詢存放區 變體資訊
SELECT
qspl.plan_type_desc AS query_plan_type,
qspl.plan_id as query_store_planid,
qspl.query_id as query_store_queryid,
qsqv.query_variant_query_id as query_store_variant_queryid,
qsqv.parent_query_id as query_store_parent_queryid,
qsqv.dispatcher_plan_id as query_store_dispatcher_planid,
OBJECT_NAME(qsq.object_id) as module_name,
qsq.query_hash,
qsqtxt.query_sql_text,
convert(xml,qspl.query_plan)as show_plan_xml,
qsrs.last_execution_time as last_execution_time,
qsrs.count_executions AS number_of_executions,
qsq.count_compiles AS number_of_compiles
FROM sys.query_store_runtime_stats AS qsrs
JOIN sys.query_store_plan AS qspl
ON qsrs.plan_id = qspl.plan_id
JOIN sys.query_store_query_variant qsqv
ON qspl.query_id = qsqv.query_variant_query_id
JOIN sys.query_store_query as qsq
ON qsqv.parent_query_id = qsq.query_id
JOIN sys.query_store_query_text AS qsqtxt
ON qsq.query_text_id = qsqtxt .query_text_id
ORDER BY qspl.query_id, qsrs.last_execution_time;
GO
檢視 查詢存放區 發送器和變體資訊
SELECT
qspl.plan_type_desc AS query_plan_type,
qspl.plan_id as query_store_planid,
qspl.query_id as query_store_queryid,
qsqv.query_variant_query_id as query_store_variant_queryid,
qsqv.parent_query_id as query_store_parent_queryid,
qsqv.dispatcher_plan_id as query_store_dispatcher_planid,
qsq.query_hash,
qsqtxt.query_sql_text,
CONVERT(xml,qspl.query_plan)as show_plan_xml,
qsq.count_compiles AS number_of_compiles,
qsrs.last_execution_time as last_execution_time,
qsrs.count_executions AS number_of_executions
FROM sys.query_store_query qsq
LEFT JOIN sys.query_store_query_text qsqtxt
ON qsq.query_text_id = qsqtxt.query_text_id
LEFT JOIN sys.query_store_plan qspl
ON qsq.query_id = qspl.query_id
LEFT JOIN sys.query_store_query_variant qsqv
ON qsq.query_id = qsqv.query_variant_query_id
LEFT JOIN sys.query_store_runtime_stats qsrs
ON qspl.plan_id = qsrs.plan_id
LEFT JOIN sys.query_store_runtime_stats_interval qsrsi
ON qsrs.runtime_stats_interval_id = qsrsi.runtime_stats_interval_id
WHERE qspl.plan_type = 1 or qspl.plan_type = 2
ORDER BY qspl.query_id, qsrs.last_execution_time;
GO