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‎datafusion/sqllogictest/test_files/explain.slt‎

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@@ -178,6 +178,7 @@ logical_plan after type_coercion SAME TEXT AS ABOVE
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analyzed_logical_plan SAME TEXT AS ABOVE
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logical_plan after rewrite_set_comparison SAME TEXT AS ABOVE
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logical_plan after optimize_unions SAME TEXT AS ABOVE
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logical_plan after unions_to_filter SAME TEXT AS ABOVE
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logical_plan after simplify_expressions SAME TEXT AS ABOVE
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logical_plan after replace_distinct_aggregate SAME TEXT AS ABOVE
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logical_plan after eliminate_join SAME TEXT AS ABOVE
@@ -202,6 +203,7 @@ logical_plan after push_down_leaf_projections SAME TEXT AS ABOVE
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logical_plan after optimize_projections TableScan: simple_explain_test projection=[a, b, c]
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logical_plan after rewrite_set_comparison SAME TEXT AS ABOVE
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logical_plan after optimize_unions SAME TEXT AS ABOVE
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logical_plan after unions_to_filter SAME TEXT AS ABOVE
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logical_plan after simplify_expressions SAME TEXT AS ABOVE
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logical_plan after replace_distinct_aggregate SAME TEXT AS ABOVE
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logical_plan after eliminate_join SAME TEXT AS ABOVE
@@ -549,6 +551,7 @@ logical_plan after type_coercion SAME TEXT AS ABOVE
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analyzed_logical_plan SAME TEXT AS ABOVE
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logical_plan after rewrite_set_comparison SAME TEXT AS ABOVE
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logical_plan after optimize_unions SAME TEXT AS ABOVE
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logical_plan after unions_to_filter SAME TEXT AS ABOVE
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logical_plan after simplify_expressions SAME TEXT AS ABOVE
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logical_plan after replace_distinct_aggregate SAME TEXT AS ABOVE
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logical_plan after eliminate_join SAME TEXT AS ABOVE
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logical_plan after optimize_projections TableScan: simple_explain_test projection=[a, b, c]
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logical_plan after rewrite_set_comparison SAME TEXT AS ABOVE
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logical_plan after optimize_unions SAME TEXT AS ABOVE
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logical_plan after unions_to_filter SAME TEXT AS ABOVE
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logical_plan after simplify_expressions SAME TEXT AS ABOVE
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logical_plan after replace_distinct_aggregate SAME TEXT AS ABOVE
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logical_plan after eliminate_join SAME TEXT AS ABOVE

‎docs/source/user-guide/configs.md‎

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| datafusion.optimizer.expand_views_at_output | false | When set to true, if the returned type is a view type then the output will be coerced to a non-view. Coerces `Utf8View` to `LargeUtf8`, and `BinaryView` to `LargeBinary`. |
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| datafusion.optimizer.enable_sort_pushdown | true | Enable sort pushdown optimization. When enabled, attempts to push sort requirements down to data sources that can natively handle them (e.g., by reversing file/row group read order). Returns **inexact ordering**: Sort operator is kept for correctness, but optimized input enables early termination for TopK queries (ORDER BY ... LIMIT N), providing significant speedup. Memory: No additional overhead (only changes read order). Future: Will add option to detect perfectly sorted data and eliminate Sort completely. Default: true |
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| datafusion.optimizer.enable_leaf_expression_pushdown | true | When set to true, the optimizer will extract leaf expressions (such as `get_field`) from filter/sort/join nodes into projections closer to the leaf table scans, and push those projections down towards the leaf nodes. |
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| datafusion.optimizer.enable_unions_to_filter | false | When set to true, the logical optimizer will rewrite `UNION DISTINCT` branches that read from the same source and differ only by filter predicates into a single branch with a combined filter. This optimization is conservative and only applies when the branches share the same source and compatible wrapper nodes such as identical projections or aliases. |
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| datafusion.optimizer.enable_unions_to_filter | false | When set to true, the logical optimizer will rewrite `UNION DISTINCT` branches that read from the same source and differ only by filter predicates into a single branch with a combined filter. This optimization is conservative and only applies when the branches share the same source and compatible wrapper nodes such as identical projections or aliases. |
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| datafusion.explain.logical_plan_only | false | When set to true, the explain statement will only print logical plans |
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| datafusion.explain.physical_plan_only | false | When set to true, the explain statement will only print physical plans |
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| datafusion.explain.show_statistics | false | When set to true, the explain statement will print operator statistics for physical plans |

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