libenchao commented on a change in pull request #11186: [FLINK-16200][sql]
Support JSON_EXISTS for blink planner
URL: https://github.com/apache/flink/pull/11186#discussion_r396104863
##########
File path:
flink-table/flink-table-common/src/main/java/org/apache/flink/table/functions/BuiltInFunctionDefinitions.java
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@@ -674,6 +674,14 @@
.outputTypeStrategy(TypeStrategies.MISSING)
.build();
+ // json functions
+ public static final BuiltInFunctionDefinition JSON_EXISTS =
+ new BuiltInFunctionDefinition.Builder()
+ .name("json_exists")
+ .kind(SCALAR)
+ .outputTypeStrategy(TypeStrategies.MISSING)
Review comment:
It's weird, why not directly specify the outputType? I know that all
function definitions are all defined with `MISSING` strategy, and it make me
more confuse.
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