Add position() string function to PPL

[margarit-h]

• Add position() string function to PPL

Signed-off-by: Margarit Hakobyan [email protected]

Description

Usage: The syntax POSITION(substr IN str) returns the position of the first occurrence of substring substr in string str. Returns 0 if substr is not in str. Returns NULL if any argument is NULL.

Argument type: STRING, STRING

Return type INTEGER:

(STRING IN STRING) -> INTEGER

Example::

os> source=people | eval `POSITION('world' IN 'helloworld')` = POSITION('world' IN 'helloworld'), `POSITION('invalid' IN 'helloworld')`= POSITION('invalid' IN 'helloworld')  | fields `POSITION('world' IN 'helloworld')`, `POSITION('invalid' IN 'helloworld')`
fetched rows / total rows = 1/1
+-------------------------------------+---------------------------------------+
| POSITION('world' IN 'helloworld')   | POSITION('invalid' IN 'helloworld')   |
|-------------------------------------+---------------------------------------|
| 6                                   | 0                                     |
+-------------------------------------+---------------------------------------+

Issues Resolved

#1106

Check List

• New functionality includes testing.
  • All tests pass, including unit test, integration test and doctest
• New functionality has been documented.
  • New functionality has javadoc added
  • New functionality has user manual doc added
• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 62.76%. Comparing base (354e843) to head (415e163).
⚠️ Report is 459 commits behind head on 2.x.

❌ Your project status has failed because the head coverage (62.76%) is below the target coverage (99.00%). You can increase the head coverage or adjust the target coverage.

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HEAD has 2 uploads less than BASE

Flag	BASE (354e843)	HEAD (415e163)
sql-engine	2	0

Additional details and impacted files

@@              Coverage Diff              @@
##                2.x    #1147       +/-   ##
=============================================
- Coverage     98.31%   62.76%   -35.55%     
=============================================
  Files           348       10      -338     
  Lines          8707      658     -8049     
  Branches        555      119      -436     
=============================================
- Hits           8560      413     -8147     
- Misses          142      192       +50     
- Partials          5       53       +48     

Flag	Coverage Δ
query-workbench	62.76% <ø> (?)
sql-engine	?

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[dai-chen]

Thanks for the changes!