A type-safe embedded domain specific language (EDSL) for SQL queries and results in C++.
sqlpp11 is a type-safe SQL template library for C++ that acts as an embedded domain specific language (EDSL). It allows developers to construct SQL queries using C++ syntax, with compile-time validation for errors, and interpret results as strongly-typed C++ structs. This approach eliminates many common runtime SQL errors and provides a more intuitive interface for database interactions.
C++ developers working with SQL databases who need robust, type-safe query construction and result handling, particularly in projects where runtime SQL errors are costly or where database schemas are stable.
Developers choose sqlpp11 for its rigorous compile-time error checking, which catches SQL syntax, type, and name errors before execution. Its vendor-neutral core with database-specific connectors offers flexibility, and its EDSL design integrates SQL seamlessly into C++ code, improving safety and maintainability over traditional string-based queries.
A type safe SQL template library for C++
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SQL queries are validated at compile time for syntax, type, and name errors, catching bugs long before runtime, as highlighted in the README's emphasis on type-safe EDSL design.
Core library works with multiple databases via connectors (e.g., MySQL, PostgreSQL), allowing code reuse across different SQL backends without vendor lock-in.
Query results are automatically converted to C++ types and accessed via named struct members, simplifying data handling and reducing boilerplate code.
Supports both compile-time checked static queries for safety and runtime-constructed dynamic queries for flexibility, catering to diverse use cases.
Requires generating C++ headers from DDL files using a Python script (ddl2cpp), adding an extra step to the build process and increasing upfront development overhead.
Heavy use of C++ templates can lead to long compile times and cryptic error messages, as noted in past talks linked in the README about pruning error messages.
Official connectors are only available for a few databases (e.g., MySQL, SQLite), with others like ODBC being experimental, restricting use with less common databases.
The README advises migrating to sqlpp23 for new development, indicating sqlpp11 is in maintenance mode, which may affect long-term feature updates and support.