Created
November 14, 2018 12:21
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Faster PostgreSQL upsert in HoneySQL and funcool/clojure.jdbc
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(ns app.jdbc.helpers | |
(:require [jdbc.core :as jdbc] | |
[jdbc.proto :as jdbc-proto] | |
[honeysql.core :as sql] | |
; Load extensions | |
[honeysql-postgres.format])) | |
(defn -upsert-sql | |
[table keys pk] | |
(first (sql/format {:insert-into table | |
:columns keys | |
:values [(repeat (count keys) (sql/param nil))] | |
:on-conflict [pk] | |
:do-update-set! (into {} | |
(for [k keys | |
:when (not= k pk)] | |
[k (sql/qualify "EXCLUDED" k)]))}))) | |
(defn -upsert-stmt | |
[conn table keys pk] | |
(jdbc/prepared-statement conn (-upsert-sql table keys pk))) | |
(defn upsert-q | |
"Returns prepared statement." | |
[conn table pk data] | |
(let [stmt (-upsert-stmt conn table (keys data) pk)] | |
(->> (vals data) | |
(map-indexed #(jdbc-proto/set-stmt-parameter! %2 conn stmt (inc %1))) | |
(dorun)) | |
stmt)) |
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