sys.query_store_query_variant （Transact-SQL）

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適用於：SQL Server 2022 (16.x)

包含原始參數化查詢（也稱為父查詢）、發送器計畫及其子查詢變體之間的父子關聯性相關資訊。 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資料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識別碼。
parent_query_id bigint 原始參數化查詢的識別碼。
dispatcher_plan_id bigint 參數敏感性計畫優化發送器計畫的識別碼。

備註

由於多個查詢變體可以與一個發送器計畫相關聯，因此會有多個屬於查詢變體的計畫，最終會新增至父查詢的整體資源使用量統計資料。 查詢變體的發送器計畫不會在查詢存放區中產生任何執行時間統計資料，這會導致現有的查詢存放區查詢在收集整體統計資料時不再足夠，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

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