[Kmymoney-devel] Review Request 122138: [GCI2014] Find the maximum in a set of numeric strings.

Daniel Ring dring at g33kworld.net
Wed Jan 21 08:35:04 UTC 2015

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(Updated Jan. 21, 2015, 12:35 a.m.)

Review request for KMymoney and Christian David.


I implemented your changes and the new test, and the function now passes both tests.

As for query compatibility, SUBSTR() works in both [MySQL](https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_substr) and [PostgreSQL](http://www.postgresql.org/docs/9.4/static/functions-string.html). The CAST("string" AS INTEGER) is more difficult, as [MySQL](https://dev.mysql.com/doc/refman/5.7/en/cast-functions.html#function_cast) requires either SIGNED or UNSIGNED instead of INTEGER. [PostgreSQL](http://www.postgresql.org/docs/9.4/static/sql-expressions.html#SQL-SYNTAX-TYPE-CASTS) should handle it properly, but the documentation wasn't entirely clear.

I'm enjoying this work, and I'd like to continue with it if you don't mind. Thank you again for the help!

Bugs: 339103

Repository: kmymoney


This adds a function to retrieve the highest ID number from the database. The IDs are prefixed by a short identifier string, and are stored in the database as strings.

This review request was created as a part of Google Code-In 2014. The specific task it refers to can be found here: https://www.google-melange.com/gci/task/view/google/gci2014/5774859095244800

Diffs (updated)

  kmymoney/mymoney/storage/mymoneydatabasemgrtest.h 07fc175cd9381ef0fc7ad314cf905c22a43fca81 
  kmymoney/mymoney/storage/mymoneydatabasemgrtest.cpp 642fc53d9e220f34e463b2a27ab9a5d4b0c1e3ec 
  kmymoney/mymoney/storage/mymoneystoragesql.h 469c0f47d61df783f48787660f526fccdf5264a4 
  kmymoney/mymoney/storage/mymoneystoragesql.cpp fa9fbdf7d77eaa4922302d1f583317212af45ddf 

Diff: https://git.reviewboard.kde.org/r/122138/diff/


I created a small sample database with SQLite and verified that the SQL statment worked properly. I was able to successfully build and run KMyMoney with this function included in Debian Stable (using cmake from backports). However, I was unsure how best to test the function itself, so please let me know if any issues arise.


Daniel Ring

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