From 1a12632a272dc29f60ae925be32a5eb2c5f4386c Mon Sep 17 00:00:00 2001
From: Tanner Clary <tannerclary@google.com>
Date: Mon, 11 Mar 2024 09:49:53 -0700
Subject: [PATCH] Convert negative SQRT operands to NULL in dialect.tdd

---
 connector/tableau/looker-jdbc/dialect.tdd | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/connector/tableau/looker-jdbc/dialect.tdd b/connector/tableau/looker-jdbc/dialect.tdd
index 49cab6f9179..3f7bf217454 100644
--- a/connector/tableau/looker-jdbc/dialect.tdd
+++ b/connector/tableau/looker-jdbc/dialect.tdd
@@ -239,7 +239,8 @@
       <argument type='real' />
     </function>
     <function group='numeric' name='SQRT' return-type='real'>
-      <formula>SQRT(%1)</formula>
+      <!-- BQ throws an error on negative numbers, instead we want NULL. -->
+      <formula>SQRT(IF(%1 < 0, NULL, %1))</formula>
       <argument type='real' />
     </function>
     <function group='numeric' name='SQUARE' return-type='real'>