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Oracle Execution Plan Insights by koushik1985 is a document available to read on EtoBox.

- The Plan Hash Value (PHV) alone is not enough to determine if two execution plans are the same, as the same PHV can correspond to different plans if access and filter predicates are considered. - It is also possible to have the same execution plan but a different PHV if the plan contains system-generated names. - SQLTXPLAIN (SQLT) introduces SQLT_PHV1 and SQLT_PHV2 which provide a more accurate comparison of plans by considering operation IDs, predicates, and other details beyond just the PHV. - Checkin

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koushik1985

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EN