suez1224 commented on a change in pull request #6432: [FLINK-9970] [table] Add
ASCII/CHR function for table/sql API
URL: https://github.com/apache/flink/pull/6432#discussion_r206716042
##########
File path:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/codegen/calls/FunctionGenerator.scala
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@@ -146,12 +146,25 @@ object FunctionGenerator {
STRING_TYPE_INFO,
BuiltInMethod.OVERLAY.method)
+ addSqlFunctionMethod(
+ ASCII,
+ Seq(STRING_TYPE_INFO),
+ STRING_TYPE_INFO,
Review comment:
got it, but why do we just returning null for empty string input? I imagine
someone might need to CAST(ASCII(argument) AS INTEGER) for their use, the empty
string output will cause exception.
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