Chris Green created NIFI-5060:
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Summary: UpdateRecord substringAfter and substringAfterLast only
increments by 1
Key: NIFI-5060
URL: https://issues.apache.org/jira/browse/NIFI-5060
Project: Apache NiFi
Issue Type: Bug
Components: Extensions
Affects Versions: 1.6.0
Reporter: Chris Green
Attachments: Validate_substringafter_Behavior.xml
This is my first submitted issue, so please feel free to point me in the
correct direction if I make process mistakes.
Replication:
Drag a GenerateFlowFile onto the canvas and configure this property, and set
run schedule to some high value like 600 seconds
"Custom Text" \{"value": "01230123"}
Connect GenerateFlowFile with an UpdateAttribute set to add the attribute
"avro.schema" with a value of "{ "type": "record",
"name": "test",
"fields" : [\{"name": "value", "type": "string"}]
}"
Connect UpdateAttribute to an UpdateRecord onto the canvas, Autoterminate
success and failure. Set the Record Reader to a new JSONTreeReader. On the
JsonTreeReader configure it to use the "Use 'Schema Text' Attribute".
Create a JsonRecordSetWriter and set the Schema Text to:
"{ "type": "record",
"name": "test",
"fields" : [\{"name": "value", "type": "string"},
{"name": "example1", "type": "string"},
{"name": "example2", "type": "string"},
{"name": "example3", "type": "string"},
{"name": "example4", "type": "string"}]
}"
Add the following properties to UpdateRecord
||Heading 1||Heading 2||
|/example1|substringAfter(/value, "1") |
|/example2|substringAfter(/value, "123") |
|/example3|substringAfterLast(/value, "1")|
|/example4|substringAfterLast(/value, "123")|
Resulting record currently:
[ {
"value" : "01230123",
"example1" : "230123",
"example2" : "30123",
"example3" : "23",
"example4" : "3"
} ]
Problem:
When using the UpdateRecord processor, and the substringAfter() function after
the search phrase is found it will only increment the substring returned by 1
rather than the length of the search term.
Based off XPath and other implementations of substringAfter functions I've seen
the value returned should remove the search term rather than just the first
character of the search term.
Resulting record should be:
[ {
"value" : "01230123",
"example1" : "230123",
"example2" : "30123",
"example3" : "23",
"example4" : "3"
} ]
I'm cleaning up a fix with test code that will change the increment from 1 to
the length of the search terms.
It appears substringBefore are not impacted by the behavior as always returns
the index before the found search term which is the expected behavior
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