diff --git a/src/parse/keyword.rs b/src/parse/keyword.rs
index 4be15a1315..f856cee785 100644
--- a/src/parse/keyword.rs
+++ b/src/parse/keyword.rs
@@ -3,3 +3,4 @@ pub static THEN: &str = "then";
 pub static ELSE: &str = "else";
 pub static CASE: &str = "case";
 pub static WHEN: &str = "when";
+pub static AS: &str = "as";
diff --git a/src/parse/mod.rs b/src/parse/mod.rs
index c9e63bc821..d11f8aeee2 100644
--- a/src/parse/mod.rs
+++ b/src/parse/mod.rs
@@ -599,7 +599,8 @@ fn reserved_keyword<'a>() -> impl Parser<'a, ()> {
         string(keyword::THEN),
         string(keyword::ELSE),
         string(keyword::CASE),
-        string(keyword::WHEN)
+        string(keyword::WHEN),
+        string(keyword::AS)
     )
 }