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oracle 12c vs oracle 11204 优化器特性optimizer_features_enable差异

OPTIMIZER_FEATURES_ENABLE('12.1.0.2') |OPTIMIZER_FEATURES_ENABLE('11.2.0.4')


optimizer_features_enable = 12.1.0.2 |optimizer_features_enable = 11.2.0.4
_optimizer_undo_cost_change = 12.1.0.2 | _optimizer_undo_cost_change = 11.2.0.4
_fix_control_key = 0 | _fix_control_key = -1750344682
_optimizer_cube_join_enabled = true | _optimizer_cube_join_enabled = false
_optimizer_hybrid_fpwj_enabled = true | _optimizer_hybrid_fpwj_enabled = false
_px_replication_enabled = true | _px_replication_enabled = false
_optimizer_partial_join_eval = true | _optimizer_partial_join_eval = false
_px_concurrent = true | _px_concurrent = false
_px_object_sampling_enabled = true | _px_object_sampling_enabled = false
_optimizer_unnest_scalar_sq = true | _optimizer_unnest_scalar_sq = false
_px_filter_parallelized = true | _px_filter_parallelized = false
_px_filter_skew_handling = true | _px_filter_skew_handling = false
_optimizer_multi_table_outerjoin = true | _optimizer_multi_table_outerjoin = false
_px_groupby_pushdown = force | _px_groupby_pushdown = choose
_optimizer_ansi_join_lateral_enhance = true | _optimizer_ansi_join_lateral_enhance = false
_px_parallelize_expression = true | _px_parallelize_expression = false
_optimizer_ansi_rearchitecture = true | _optimizer_ansi_rearchitecture = false
_optimizer_gather_stats_on_load = true | _optimizer_gather_stats_on_load = false
_px_adaptive_dist_method = choose | _px_adaptive_dist_method = off
_optimizer_batch_table_access_by_rowid = true | _optimizer_batch_table_access_by_rowid = false
_px_wif_dfo_declumping = choose | _px_wif_dfo_declumping = off
_px_wif_extend_distribution_keys = true | _px_wif_extend_distribution_keys = false
_px_join_skew_handling = true | _px_join_skew_handling = false
_px_partial_rollup_pushdown = adaptive | _px_partial_rollup_pushdown = off
_px_single_server_enabled = true | _px_single_server_enabled = false
_optimizer_dsdir_usage_control = 126 | _optimizer_dsdir_usage_control = 0
_px_cpu_autodop_enabled = true | _px_cpu_autodop_enabled = false
_optimizer_use_gtt_session_stats = true | _optimizer_use_gtt_session_stats = false
_optimizer_adaptive_plans = true | _optimizer_adaptive_plans = false
_optimizer_proc_rate_level = basic | _optimizer_proc_rate_level = off
_adaptive_window_consolidator_enabled = true | _adaptive_window_consolidator_enabled = false
_optimizer_strans_adaptive_pruning = true | _optimizer_strans_adaptive_pruning = false
_optimizer_null_accepting_semijoin = true | _optimizer_null_accepting_semijoin = false
_optimizer_cluster_by_rowid = true | _optimizer_cluster_by_rowid = false
_optimizer_cluster_by_rowid_control = 129 | _optimizer_cluster_by_rowid_control = 3
_distinct_agg_optimization_gsets = choose | _distinct_agg_optimization_gsets = off
_gby_vector_aggregation_enabled = true | _gby_vector_aggregation_enabled = false
_optimizer_vector_transformation = true | _optimizer_vector_transformation = false
_optimizer_aggr_groupby_elim = true | _optimizer_aggr_groupby_elim = false
_optimizer_reduce_groupby_key = true | _optimizer_reduce_groupby_key = false
_optimizer_cluster_by_rowid_batched = true | _optimizer_cluster_by_rowid_batched = false
_optimizer_inmemory_table_expansion = true | _optimizer_inmemory_table_expansion = false
_optimizer_inmemory_gen_pushable_preds = true | _optimizer_inmemory_gen_pushable_preds = false
_optimizer_inmemory_autodop = true | _optimizer_inmemory_autodop = false
_optimizer_inmemory_access_path = true | _optimizer_inmemory_access_path = false
_optimizer_inmemory_bloom_filter = true | _optimizer_inmemory_bloom_filter = false
_optimizer_nlj_hj_adaptive_join = true | _optimizer_nlj_hj_adaptive_join = false
_px_external_table_default_stats = true | _px_external_table_default_stats = false
_optimizer_inmemory_minmax_pruning = true | _optimizer_inmemory_minmax_pruning = false
_optimizer_inmemory_cluster_aware_dop = true | _optimizer_inmemory_cluster_aware_dop = false
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