Foreword
For years I have been fascinated with the differences between general-purpose programming languages and databases. Practically every enterprise application built today is coded in a general-purpose programming language and talks to a database, yet the two ecosystems are amazingly different and quite poorly integrated—the impedance mismatch between object-oriented programming and the relational model is the gift that keeps on giving when it comes to application complexity.
But the thing I find particularly puzzling is the lack of query capabilities in general-purpose programming languages. Why is it you can query database tables but not in-memory objects? Why are XPath and XQuery so arbitrarily different from SQL? Why is it so hard to ...
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