Different Between Explain Plan and Hints in Oracle
I ran EXPLAIN PLAN and Oracle was doing full scans of all of these intermediate tables. Select LEADINGs h from Student SStandard StStudent_History h. Oracle Sql Joins Tech Volcano Oracle Sql Sql Join Sql The optimiser will try to come up with the best plan that incorporates your hint. . These are the different types of Oracle Hints with examples. Because of differences in the execution environment and explain plan environment the explained plan can differ from. It reads the entire index using multiblock reads unlike a full index scan and can be parallelized. I am trying to figure out why the explain plan and performance for the same query is different between our staging environment and our production environment when using the RESULT_CACHE hint. When writing SQL you may know information about the data unknown to the optimizer. On production the query execution plan it picks for most queries is different from development a...