Skip to content

Support custom transformation rules in Clojure #1763

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
markwort wants to merge 2 commits into
base: main
Choose a base branch
from
Open

Support custom transformation rules in Clojure #1763

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
7f494a9
teach pgloader to read and apply custom transform rules written in th…
markwort Jul 23, 2026
e0529ca
Merge branch 'main' into main
markwort Jul 31, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
19 changes: 16 additions & 3 deletions clojure/src/pgloader/load_file/ast.clj
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -3,9 +3,12 @@
[clojure.string :as str]
[clojure.tools.logging :as log]
[pgloader.pg-service :as pg-service]
[pgloader.mysql-options :as mysql-opts])
[pgloader.mysql-options :as mysql-opts]
[pgloader.transforms :refer [compile-using-expr]])
(:import [java.net URI]))

(declare s-expr-content)

(set! *warn-on-reflection* true)

(defrecord LoadCommand
Expand Down Expand Up @@ -295,8 +298,18 @@
(clojure.string/join " " (map second (filter #(= :word-part (first %)) (rest target-inner)))))))
using-fn (some (fn [n]
(when (and (vector? n) (= :using-fn (first n)))
(keyword (second (some #(when (and (vector? %) (= :fn-name (first %))) %)
(rest n))))))
(let [expr-node (some #(when (and (vector? %)
(or (= :fn-name (first %))
(= :s-expr (first %))
(= :reader-fn (first %))))
%)
(rest n))]
(case (first expr-node)
:fn-name (keyword (second expr-node))
:s-expr (compile-using-expr
(str "(" (s-expr-content expr-node) ")"))
:reader-fn (compile-using-expr
(str "#(" (s-expr-content (second expr-node)) ")"))))))
flat-cast-opts)
when-node (first (filter #(= :when-or-unsigned (first %)) inner-children))
when-cond (when when-node
Expand Down
2 changes: 1 addition & 1 deletion clojure/src/pgloader/load_file/grammar.clj
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -266,7 +266,7 @@
keep-not-null = <'keep'> <ws> <'not'> <ws> <'null'>
drop-typemod = <'drop'> <ws> <'typemod'>
keep-typemod = <'keep'> <ws> <'typemod'>
using-fn = <'using'> <ws> fn-name
using-fn = <'using'> <ws> (s-expr | reader-fn | fn-name)
fn-name = #'[a-zA-Z][a-zA-Z0-9_-]*'
when-or-unsigned = <'when'> <ws> (when-expr | <'unsigned'> | <'default'> <ws> when-default-val) (<ws> when-not-null)?
when-not-null = <'and'> <ws> <'not'> <ws> <'null'>
Expand Down