Query Plan Operator Control Parameters
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Query Plan Operator Control Parameters
The following parameters control the types of plan operations the legacy query optimizer can use. Enable or disable plan operations to force the legacy query optimizer to choose a different plan. This is useful for testing and comparing query performance using different plan types.
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enable_bitmapscan enable_groupagg enable_hashagg enable_hashjoin enable_indexscan enable_mergejoin enable_nestloop enable_seqscan enable_sort enable_tidscan gp_enable_adaptive_nestloop gp_enable_agg_distinct gp_enable_agg_distinct_pruning |
gp_enable_direct_dispatch gp_enable_fallback_plan gp_enable_fast_sri gp_enable_groupext_distinct_ gather gp_enable_groupext_distinct_ pruning gp_enable_multiphase_agg gp_enable_predicate_ propagation gp_enable_preunique gp_enable_relsize_collection gp_enable_sequential_window_ plans gp_enable_sort_distinct gp_enable_sort_limit gp_inline_simple_cte |