staniek / kexi Goto Github PK

Grouping and aggregation is a key feature for user applications. Currently Kexi refuses functions like SUM(), COUNT(), etc.

Example: http://www.jegsworks.com/lessons/databases/tablesqueries/query-sumofcost-byagent-design.gif

KDE bug: https://bugs.kde.org/show_bug.cgi?id=195360
KDE Issue: https://invent.kde.org/office/kexi/-/issues/90

This wish has 40 votes there.

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It would help to add support for native SQL statements to Kexi. Assuming user knows what she's doing, any SQL query, of any type, would be sent intact to the backend.

Details at: https://bugs.kde.org/show_bug.cgi?id=298149

The native query would be visually differentiated in special way, e.g. via different icon. It could be also possible to indicate type of query using some heuristics (but without 100% of certainty).

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Many applications store their data in a SQLite3 database file. However Kexi requires the file to be created with Kexi. Moreover it does not accept importing the 3rd-party SQLite files.

An import option is a minimum what's needed.

Being able to import any SQLite3 file, Kexi can be used to further analyzing, editing and processing the data.

Example apps that use SQLite: Digikam, Kanboard. More at http://www.sqlite.org/famous.html.
Many programming languages have access to creation SQLite database files: Python, Ruby, Perl... not counting C/C++.

Requirements:

• Standard Kexi Migration plugin should be created, so schema and/or data is imported
• Data types should be preserved as much as possible. If unsure, fallback to long text.

Development plan:

• Research, design the architecture and functionality
• Test cases generation
• Implementation
• Verification using test cases

KDE bug: https://bugs.kde.org/show_bug.cgi?id=125843
This wish has 21 votes there during the last 8 years.

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It should be possible to modify the table's design without losing all it's data.

This feature is of top importance for Kexi.

Designing, implementing and maintaining this feature requires large investment, approximately 5 man-months. It involves writing unit and functional tests and caring about specifics of SQLite, PostgreSQL, and MySQL.

KDE Design page: http://community.kde.org/Kexi/Plugins/Tables/Simple_alter_table
KDE Bug: https://bugs.kde.org/show_bug.cgi?id=125253

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KDE wish #: https://bugs.kde.org/351150
Design: https://community.kde.org/Kexi/Plugins/Reports/CLI_Export

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Primary keys are ignored. Kexi should carefully merge changes from newer mdbtools to address this.

KDE Bugs:

• https://bugs.kde.org/show_bug.cgi?id=277583
• https://bugs.kde.org/show_bug.cgi?id=336560

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