how to change a 11.2.0.1 database to a 10.2.0.4 database

PARAMETERS TO CHANGE 11.2.0.1 TO 10.2.0.4 [ID 1274553.1]

Applies to:

Oracle Server - Enterprise Edition - Version: 10.2.0.4 to 11.2.0.1 - Release: 10.2 to 11.2
Information in this document applies to any platform.

Purpose

This note shows 11.2.0.1 parameter settings to return optimizer back to 10.2.0.4 parameters

Questions and Answers

These are the parameters that are changed when setting optimizer_features_enable=10.2.0.4 in 11.2.0.1 database. These values represent OFE=10.2.0.4 and -- is the 11.2.0.1 value

alter session set "_optimizer_undo_cost_change" = '10.2.0.4'; -- 11.2.0.1
alter session set "_optimizer_null_aware_antijoin" = false; -- true
alter session set "_optimizer_extend_jppd_view_types" = false; -- true
alter session set "_replace_virtual_columns" = false; -- true
alter session set "_first_k_rows_dynamic_proration" = false; -- true
alter session set "_bloom_pruning_enabled" = false; -- true
alter session set "_optimizer_multi_level_push_pred" = false; -- true
alter session set "_optimizer_group_by_placement" = false; -- true
alter session set "_optimizer_extended_cursor_sharing_rel" = none; -- simple
alter session set "_optimizer_adaptive_cursor_sharing" = false; -- true
alter session set "_optimizer_improve_selectivity" = false ; -- true
alter session set "_optimizer_enable_density_improvements" = false; -- true
alter session set "_optimizer_native_full_outer_join" = off; -- force
alter session set "_optimizer_enable_extended_stats" = false; -- true
alter session set "_nlj_batching_enabled" = 0; -- 1
alter session set "_optimizer_extended_stats_usage_control" = 255; -- 224
alter session set "_bloom_folding_enabled" = false; -- true
alter session set "_optimizer_coalesce_subqueries" = false; -- true
alter session set "_optimizer_fast_pred_transitivity" = false; -- true
alter session set "_optimizer_fast_access_pred_analysis" = false; -- true
alter session set "_optimizer_unnest_disjunctive_subq" = false; -- true
alter session set "_optimizer_unnest_corr_set_subq" = false; -- true
alter session set "_optimizer_distinct_agg_transform" = false; -- true
alter session set "_aggregation_optimization_settings" = 32; -- 0
alter session set "_optimizer_connect_by_elim_dups" = false; -- true
alter session set "_optimizer_eliminate_filtering_join" = false; -- true
alter session set "_connect_by_use_union_all" = old_plan_mode; --true
alter session set "_optimizer_join_factorization" = false; -- true
alter session set "_optimizer_use_cbqt_star_transformation" = false; -- true
alter session set "_optimizer_table_expansion" = false ; -- true
alter session set "_and_pruning_enabled" = false ; -- true
alter session set "_optimizer_distinct_placement" = false ; -- true
alter session set "_optimizer_use_feedback" = false ; -- true
alter session set "_optimizer_try_st_before_jppd" = false ; -- true