sync

2023-03-30 17:51:01 +02:00
parent 4736205eb8
commit ed02942184
17 changed files with 19852 additions and 0 deletions
--- a/plan.sql
+++ b/plan.sql
@@ -0,0 +1,57 @@
+USE master
+SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
+GO
+ 
+WITH XMLNAMESPACES (DEFAULT 'http://schemas.microsoft.com/sqlserver/2004/07/showplan')
+, PlanMissingIndexes
+AS (SELECT query_plan, usecounts
+    FROM sys.dm_exec_cached_plans cp
+    CROSS APPLY sys.dm_exec_query_plan(cp.plan_handle) qp
+    WHERE qp.query_plan.exist('//MissingIndexes') = 1)
+, MissingIndexes
+AS (SELECT stmt_xml.value('(QueryPlan/MissingIndexes/MissingIndexGroup/MissingIndex/@Database)[1]', 'sysname') AS DatabaseName,
+           stmt_xml.value('(QueryPlan/MissingIndexes/MissingIndexGroup/MissingIndex/@Schema)[1]', 'sysname') AS SchemaName,
+           stmt_xml.value('(QueryPlan/MissingIndexes/MissingIndexGroup/MissingIndex/@Table)[1]', 'sysname') AS TableName,
+           stmt_xml.value('(QueryPlan/MissingIndexes/MissingIndexGroup/@Impact)[1]', 'float') AS Impact,
+           ISNULL(CAST(stmt_xml.value('(@StatementSubTreeCost)[1]', 'VARCHAR(128)') AS FLOAT), 0) AS Cost,
+           pmi.usecounts UseCounts,
+           STUFF((SELECT DISTINCT ', ' + c.value('(@Name)[1]', 'sysname')
+					FROM stmt_xml.nodes('//ColumnGroup') AS t(cg)
+					CROSS APPLY cg.nodes('Column') AS r(c)
+					WHERE cg.value('(@Usage)[1]', 'sysname') = 'EQUALITY'
+					FOR XML PATH('')),1,2,''
+                ) AS equality_columns,
+           STUFF(( SELECT DISTINCT ', ' + c.value('(@Name)[1]', 'sysname')
+					FROM stmt_xml.nodes('//ColumnGroup') AS t(cg)
+					CROSS APPLY cg.nodes('Column') AS r(c)
+					WHERE cg.value('(@Usage)[1]', 'sysname') = 'INEQUALITY'
+					FOR XML PATH('')),1,2,''
+                ) AS inequality_columns,
+           STUFF((SELECT DISTINCT ', ' + c.value('(@Name)[1]', 'sysname')
+					FROM stmt_xml.nodes('//ColumnGroup') AS t(cg)
+					CROSS APPLY cg.nodes('Column') AS r(c)
+					WHERE cg.value('(@Usage)[1]', 'sysname') = 'INCLUDE'
+					FOR XML PATH('')),1,2,''
+                ) AS include_columns,
+           query_plan,
+           stmt_xml.value('(@StatementText)[1]', 'varchar(4000)') AS sql_text
+    FROM PlanMissingIndexes pmi
+    CROSS APPLY query_plan.nodes('//StmtSimple') AS stmt(stmt_xml)
+    WHERE stmt_xml.exist('QueryPlan/MissingIndexes') = 1)
+ 
+SELECT TOP 200
+       DatabaseName,
+       SchemaName,
+       TableName,
+       equality_columns,
+       inequality_columns,
+       include_columns,
+       UseCounts,
+       Cost,
+       Cost * UseCounts [AggregateCost],
+       Impact,
+       query_plan
+FROM MissingIndexes
+WHERE DatabaseName = '[arizona]' 
+AND TableName = '[PH_prescription_line]'
+ORDER BY Cost * UseCounts DESC;