Lorand Bendig created PIG-3969:
----------------------------------
Summary: Javascript UDF fails if no outputschema is defined
Key: PIG-3969
URL: https://issues.apache.org/jira/browse/PIG-3969
Project: Pig
Issue Type: Bug
Affects Versions: 0.12.0
Reporter: Lorand Bendig
Assignee: Lorand Bendig
Fix For: 0.14.0
Example to reproduce the issue:
{code}
cat simple.js
function test(word) {
return word;
}
register 'simple.js' using org.apache.pig.scripting.js.JsScriptEngine as
myfuncs;
A = LOAD 'data' as (a:chararray);
B = FOREACH A GENERATE myfuncs.test($0);
{code}
Pig Stack Trace
---------------
ERROR 1200: <line 1, column 3> mismatched input '.' expecting EOF
...
Caused by: java.lang.IllegalArgumentException: test.outputSchema is not a valid
schema: <line 1, column 3> mismatched input '.' expecting EOF
at org.apache.pig.scripting.js.JsFunction.<init>(JsFunction.java:184)
... 38 more
Caused by: Failed to parse: <line 1, column 3> mismatched input '.' expecting
EOF
at
org.apache.pig.parser.QueryParserDriver.parseSchema(QueryParserDriver.java:94)
at
org.apache.pig.parser.QueryParserDriver.parseSchema(QueryParserDriver.java:108)
at org.apache.pig.impl.util.Utils.parseSchema(Utils.java:222)
at org.apache.pig.impl.util.Utils.getSchemaFromString(Utils.java:196)
at org.apache.pig.scripting.js.JsFunction.<init>(JsFunction.java:182)
... 38 more
Problem: if no output schema is defined, an
{{org.mozilla.javascript.Undefined}} object will be passed to
{{Utils#getSchemaFromString}} which causes the exception.
Should: if there's no schema defined, udf should return an unnamed bytearray
field.
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