Fix #226 by adding assert

CHANGES.md

@@ -2,6 +2,7 @@
 
 * `#sql/inline nil` should produce `NULL`. Fix #221. (@seancorfield)
 * `#sql/inline :kw` should produce `"kw"`. Fix #224 via PR #225. (@vincent-dm) Note: this introduces a new protocol, `Inlinable`, which controls inline value rendering, and changes the behavior of `#sql/inline :foo/bar` to produce just `"bar"` (where it was probably invalid SQL before).
+* Alias expressions `[:col :alias]` are now checked to have exactly two elements. Fix #226.
 
 ## 0.9.3
 

src/honeysql/format.cljc

@@ -349,14 +349,16 @@
     (paren-wrap (comma-join (map to-sql x)))
     :else
     ;; alias
-    (str (to-sql (first x))
-         ; Omit AS in FROM, JOIN, etc. - Oracle doesn't allow it
-         (if (= :select *clause*)
-           " AS "
-           " ")
-         (if (string? (second x))
-           (quote-identifier (second x))
-           (to-sql (second x))))))
+    (do
+      (assert (= 2 (count x)) (str "Alias should have two parts" x))
+      (str (to-sql (first x))
+           ; Omit AS in FROM, JOIN, etc. - Oracle doesn't allow it
+           (if (= :select *clause*)
+             " AS "
+             " ")
+           (if (string? (second x))
+             (quote-identifier (second x))
+             (to-sql (second x)))))))
 
 (extend-protocol types/Inlinable
   #?(:clj clojure.lang.Keyword