snuyanzin commented on code in PR #22324:
URL: https://github.com/apache/flink/pull/22324#discussion_r1201632409
##########
flink-table/flink-table-api-java/src/main/java/org/apache/flink/table/api/config/ExecutionConfigOptions.java:
##########
@@ -435,6 +435,16 @@ public class ExecutionConfigOptions {
"Determines whether CAST will operate following
the legacy behaviour "
+ "or the new one that introduces various
fixes and improvements.");
+ @Documentation.TableOption(execMode =
Documentation.ExecMode.BATCH_STREAMING)
+ public static final ConfigOption<MapKeyDedupPolicy>
TABLE_EXEC_MAPKEY_DEDUP_POLICY =
+ key("table.exec.mapkey-dedup-policy")
Review Comment:
besides `map_from_array` there are others, e.g. `map` constructor
different ways of casting e.g.
```sql
select cast(map['1', '2', ' 1', '2'] as map<int,int>);
```
it looks like a major change and probably makes sense to discuss it first
rather to make it silently (e.g. there is nothing about that in corresponding
JIRA issue)
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