??????Doris UDF

[????????]

Hi!
This error I have fixed, but another occurs:ERROR 1064(HY000):errCode = 
2,detailMessage = Varchar Size must be >0 :-1
I don't know what it means.


Thanks??
look forward to your response



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<751937...@qq.com&gt;;
????????:&nbsp;2021??7??28??(??????) ????11:33
??????:&nbsp;"dev"<dev@doris.apache.org&gt;;

????:&nbsp;Doris UDF



Hi!
I have one question about Doris UDF.
Now,I have prepared one file named libudfsm4.so and &nbsp;I &nbsp;want to 
create UDF.
Follows are my sql, but error happens:ERROR 1064 (HY000): errCode = 2, 
detailMessage = Please check your sql, we meet an error when parsing.
I don't know what this error means and how to fix it.
My steps are:
Step one:I put libudfsm4.so in /opt/doris/incubator-doris/udf_decry/ and send 
nm libudfsm4.so | grep udf 
to get symbol.I don't know what I have done is right or not.
Step two:I don't know how to put libudfsm4.so to someplace where http/https can 
reach so I let object_file equals local uri,I don't know this is right or not.
Thanks??
look forward to your response
CREATE FUNCTION dwd_smart_community.sm4Decry ??VARCHAR?? RETURNS VARCHAR 
PROPERTIES (
    "symbol" =  
"_ZN9doris_udf10sm4DecryptEPNS_15FunctionContextERKNS_9StringValE",
    "object_file" = "/opt/doris/incubator-doris/udf/udf_decry/libudfsm4.so"
);