From fc71411f293021b791302d6c1932d326981d5a48 Mon Sep 17 00:00:00 2001
From: Miguel Molina <miguel@erizocosmi.co>
Date: Thu, 20 Jun 2019 15:50:32 +0200
Subject: [PATCH] function: correctly transform up explode nodes

Signed-off-by: Miguel Molina <miguel@erizocosmi.co>
---
 engine_test.go                     | 10 ++++++++++
 sql/expression/function/explode.go |  2 +-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/engine_test.go b/engine_test.go
index 99c0c3516..0299ad20e 100644
--- a/engine_test.go
+++ b/engine_test.go
@@ -2481,6 +2481,16 @@ var generatorQueries = []struct {
 			{int64(3), "f", "third"},
 		},
 	},
+	{
+		`SELECT EXPLODE(SPLIT(c, "")) FROM t LIMIT 5`,
+		[]sql.Row{
+			{"f"},
+			{"i"},
+			{"r"},
+			{"s"},
+			{"t"},
+		},
+	},
 	{
 		`SELECT a, EXPLODE(b) AS x, c FROM t WHERE x = 'e'`,
 		[]sql.Row{
diff --git a/sql/expression/function/explode.go b/sql/expression/function/explode.go
index 5c96f509a..c001eb5f9 100644
--- a/sql/expression/function/explode.go
+++ b/sql/expression/function/explode.go
@@ -86,7 +86,7 @@ func (e *Generate) String() string {
 
 // TransformUp implements the sql.Expression interface.
 func (e *Generate) TransformUp(f sql.TransformExprFunc) (sql.Expression, error) {
-	c, err := f(e.Child)
+	c, err := e.Child.TransformUp(f)
 	if err != nil {
 		return nil, err
 	}