As with any hash function, two different plan cache query shapes may result in the same hash value. However, the occurrence of hash collisions between different plan cache query shapes is unlikely. For more information onplanCacheShapeHashandplanCacheKey, seeplanCacheShapeHash and planCacheKey. ...
Under certain conditions the plan shown when using EXPLAIN PLAN can be different from the plan shown using V$SQL_PLAN. For example, when the SQL statement contains bind variables the plan shown from using EXPLAIN PLAN ignores the bind variable values while the plan shown in V$SQL_PLAN takes ...
Prove that an edge e of a connected graph G is a bridge if and only if e belongs to every spanning tree of G. Write A CPP program for the following.1] Draw the graph G 2] Write the sequence of vertices of G using a DFS traversal, starting ...
A short reference of the most common Db2 (LUW) execution plan operations. Find the full list in theIBM documentation. Index and Table Access IXSCAN TheIXSCANperforms the B-tree traversalandfollows the leaf node chain to find all matching entries. See alsoChapter 1, “Anatomy of an SQL Inde...
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In the above example, we use python programming language to implement the binary tree in the data structure. In this example, we implement three different operations a pre-order tree traversal, in-order tree traversal, and postorder tree traversal, as shown in the above program. The final outp...
As with any hash function, two different query shapes may result in the same hash value. However, the occurrence of hash collisions between different query shapes is unlikely. For more information onqueryHashandplanCacheKey, seequeryHashandplanCacheKey. ...
Under certain conditions the plan shown when using EXPLAIN PLAN can be different from the plan shown using V$SQL_PLAN. For example, when the SQL statement contains bind variables the plan shown from using EXPLAIN PLAN ignores the bind variable values while the plan shown in V$SQL_PLAN takes ...
As with any hash function, two different query shapes may result in the same hash value. However, the occurrence of hash collisions between different query shapes is unlikely. For more information onqueryHashandplanCacheKey, seequeryHashandplanCacheKey. ...
However, the occurrence of hash collisions between different query shapes is unlikely. For more information on queryHash and planCacheKey, see queryHash and planCacheKey. explain.queryPlanner.planCacheKey A hash of the key for the plan cache entry associated with the query. Unlike the explain...