coderfender commented on code in PR #21720:
URL: https://github.com/apache/datafusion/pull/21720#discussion_r3186527944
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datafusion/common/src/config.rs:
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@@ -692,6 +692,17 @@ config_namespace! {
/// `false` — ANSI SQL mode is disabled by default.
pub enable_ansi_mode: bool, default = false
+ /// Policy for handling duplicate keys in Spark-compatible
map-construction
Review Comment:
This makes sense to me. A few weeks ago , I was proposing semantic layering
in DF essentially calling spark functions with same name as datafusion , spark
level config , ansi support and potentially spark friendly SQL. This should
help users migrating from spark to directly move their leverage logic in
datafusion
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