Abstract
Many software projects rely on a relational database in order to realize part of their functionality. Various database frameworks and object-relational mappings have been developed and used to facilitate data manipulation. Little is known about whether and how such frameworks co-occur, how they complement or compete with each other, and how this changes over time. We empirically studied these aspects for 5 Java database frameworks, based on a corpus of 3,707 GitHub Java projects. In particular, we analysed whether certain database frameworks co-occur frequently, and whether some database frameworks get replaced over time by others. Using the statistical technique of survival analysis, we explored the survival of the database frameworks in the considered projects. This provides useful evidence to software developers about which frameworks can be used successfully in combination and which combinations should be avoided.
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