NiFi: ReplaceTextWithMapping processor

问题

I have the following insert statements:

insert into temp1 values (test1, test2)
insert into temp2 values (test3)

Expected results:

insert into temp1 values (100, 200)
insert into temp2 values (300)

Essentially, I wanted to replace the first query literals test1, test2 with value 100, 200 respectively and for the second query replace test3 with value 300. Can someone help with the mapping file for the above use case?

I tried with the following, but it doesn't have any effect.

Search Value (RegEx) Replacement values

(1)(.*values.*)(.*test1)(.*,)(.*test2) -> $2 val1 $4 val2

(2)(.*values.*)(.*test1) -> $2 val3

回答1:

If this is literally the extent of the mapping you need to perform, a regular ReplaceText processor is enough. Using the settings below results in the desired output:

It simply detects every instance of test followed by a single digit and replaces it with that digit and 00.

If you need to use ReplaceTextWithMapping for more complex lookups, the mapping file must be of the format:

search_value_1    replacement_value_1
search_value_2    replacement_value_2
etc.

The delimiter between the search and replacement values is \t.

--------------------------------------------------
Standard FlowFile Attributes
Key: 'entryDate'
    Value: 'Wed Dec 07 10:48:24 PST 2016'
Key: 'lineageStartDate'
    Value: 'Wed Dec 07 10:48:24 PST 2016'
Key: 'fileSize'
    Value: '66'
FlowFile Attribute Map Content
Key: 'filename'
    Value: '56196144045589'
Key: 'path'
    Value: './'
Key: 'uuid'
    Value: 'f6b28eb0-73b5-4d94-86c2-b7a5d4cc991e'
--------------------------------------------------
insert into temp1 values (100, 200)
insert into temp2 values (300)

来源：https://stackoverflow.com/questions/41022469/nifi-replacetextwithmapping-processor

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apache-nifi