chore(12119): add expand_views_at_output optimizer config option, def…

…ault to false

datafusion/common/src/config.rs

@@ -630,6 +630,11 @@ config_namespace! {
 
         /// When set to true, the optimizer will not attempt to convert Union to Interleave
         pub prefer_existing_union: bool, default = 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`.
+        pub expand_views_at_output: bool, default = false
     }
 }
 

datafusion/sqllogictest/test_files/information_schema.slt

@@ -226,6 +226,7 @@ datafusion.optimizer.default_filter_selectivity 20
 datafusion.optimizer.enable_distinct_aggregation_soft_limit true
 datafusion.optimizer.enable_round_robin_repartition true
 datafusion.optimizer.enable_topk_aggregation true
+datafusion.optimizer.expand_views_at_output false
 datafusion.optimizer.filter_null_join_keys false
 datafusion.optimizer.hash_join_single_partition_threshold 1048576
 datafusion.optimizer.hash_join_single_partition_threshold_rows 131072
@@ -316,6 +317,7 @@ datafusion.optimizer.default_filter_selectivity 20 The default filter selectivit
 datafusion.optimizer.enable_distinct_aggregation_soft_limit true When set to true, the optimizer will push a limit operation into grouped aggregations which have no aggregate expressions, as a soft limit, emitting groups once the limit is reached, before all rows in the group are read.
 datafusion.optimizer.enable_round_robin_repartition true When set to true, the physical plan optimizer will try to add round robin repartitioning to increase parallelism to leverage more CPU cores
 datafusion.optimizer.enable_topk_aggregation true When set to true, the optimizer will attempt to perform limit operations during aggregations, if possible
+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`.
 datafusion.optimizer.filter_null_join_keys false When set to true, the optimizer will insert filters before a join between a nullable and non-nullable column to filter out nulls on the nullable side. This filter can add additional overhead when the file format does not fully support predicate push down.
 datafusion.optimizer.hash_join_single_partition_threshold 1048576 The maximum estimated size in bytes for one input side of a HashJoin will be collected into a single partition
 datafusion.optimizer.hash_join_single_partition_threshold_rows 131072 The maximum estimated size in rows for one input side of a HashJoin will be collected into a single partition