Now sqrt accepts boolean because type casting is handled by HiveTypeCoercion.

viirya · viirya · commit d38492ff1cd0 · 2015-06-15T16:02:36.000+08:00
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/ExpressionTypeCheckingSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/ExpressionTypeCheckingSuite.scala
@@ -55,7 +55,7 @@ class ExpressionTypeCheckingSuite extends SparkFunSuite {
   test("check types for unary arithmetic") {
     assertError(UnaryMinus('stringField), "operator - accepts numeric type")
     assertSuccess(Sqrt('stringField)) // We will cast String to Double for sqrt
-    assertError(Sqrt('booleanField), "function sqrt accepts numeric type")
+    assertSuccess(Sqrt('booleanField)) // We will cast Boolean to Double for sqrt
     assertError(Abs('stringField), "function abs accepts numeric type")
     assertError(BitwiseNot('stringField), "operator ~ accepts integral type")
   }

Original file line number	Diff line number	Diff line change
`@@ -55,7 +55,7 @@ class ExpressionTypeCheckingSuite extends SparkFunSuite {`
`55`	`55`	`test("check types for unary arithmetic") {`
`56`	`56`	`assertError(UnaryMinus('stringField), "operator - accepts numeric type")`
`57`	`57`	`assertSuccess(Sqrt('stringField)) // We will cast String to Double for sqrt`
`58`		`- assertError(Sqrt('booleanField), "function sqrt accepts numeric type")`
	`58`	`+ assertSuccess(Sqrt('booleanField)) // We will cast Boolean to Double for sqrt`
`59`	`59`	`assertError(Abs('stringField), "function abs accepts numeric type")`
`60`	`60`	`assertError(BitwiseNot('stringField), "operator ~ accepts integral type")`
`61`	`61`	`}`