PRQL in PostgreSQL! PL/PRQL is a PostgreSQL extension that lets you write functions with PRQL. The extension supports PostgreSQL v12-16 on Linux and macOS. What is PRQL? PRQL (Pipelined Relational Query Language) is an open-source query language for data manipulation and analysis that compiles to SQL. PRQL introduces a pipeline concept (similar to Unix pipes) where data is transformed line-by-line. The sequential series of transformations reduces the complexity often encountered with nested SQL ...