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I need to know about one of the oracle hint
Hi,
I used the hint provided below in one of the reports to enhance performance. No logic or conditions in the report were altered; only the Oracle hint mentioned below was added. The report ran within the expected time frame. However, one employee's data is missing from the report. Interestingly, upon removing the Oracle hint, the missing employee's data appears.
Could anyone explain me about the hint how it works.
/*+ OPT_PARAM('_optimizer_mjc_enabled','false')OPT_PARAM('_optimizer_cartesian_enabled','false')OPT_PARAM('_optimizer_skip_scan_enabled','false')OPT_PARAM('optimizer_adaptive_plans','false')OPT_PARAM('optimizer_features_enable','12.1.0.2') */