英語 での Execution plan の使用例とその 日本語 への翻訳
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The database cannot optimize the execution plan for a particular filter because any of them could be canceled out at runtime.
When set, they print the resulting parse tree, the query rewriter output, or the execution plan for each executed query.
Execute the specified TQL command and display the execution plan and actual measurement values such as the number of cases processed etc.
In addition, we provide parameters to disable particular execution plan like GpuScan, GpuJoin and GpuPreAgg.
Prefix any SQL statement with explain plan for to store the execution plan details in the explain tables.
The Oracle execution plan shows an INDEX UNIQUE SCAN- the operation that only traverses the index tree.
The execution plan confirms that the database uses the“reversed” index.
Tqlanalyze<Container name><Query;> Execute the specified TQL command and display the execution plan and actual measurement values such as the number of cases processed etc.
On the other hands, the query execution plan below pulls up sub-plans.
A short reference of the most common DB2 LUW execution plan operations.
Remember that you can always fall back to DBMS_XPLAN as explained in“Getting an Execution Plan”.
In both cases, the graphical representation of the execution plan appears in the“Execution plan” tab of the“Results” pane.
That is, you should always use bind parameters except for values that shall influence the execution plan.
With most databases you can even see this in the execution plan- you just have to know what to look for.
The execution plan shows that the database reads the index in a descending direction.
We shared our project execution plan, and they provided guidance on how to conduct our survey more efficiently.
TipThe execution plan(sometimes explain plan or query plan) shows the steps the database takes to execute an SQL statement.
DB2The following execution plan was gathered with the last_explained view available from the appendix. Explain Plan. .
The execution plan of other databases does not mention any sort operation at all.
Filter predicates are just labeled Predicates in SQL Server's graphical execution plan.