PostgreSQL

Did you know that Postgres was originally written in LISP? (and C)

"We expected that it would be especially easy to write the optimizer and  inference engine in LISP, since both are mostly tree processing modules"

Did you know that Postgres was originally written in LISP? (and C)

"We expected that it would be especially easy to write the optimizer and  inference engine in LISP, since both are mostly tree processing modules"

https://dsf.berkeley.edu/papers/ERL-M90-34.pdf

"Our feeling is that the use of LISP has been a terrible mistake for several reasons."

Read more on page 30 of linked paper.