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-rw-r--r--mysql-test/r/user_var.result7
-rw-r--r--mysql-test/t/user_var.test7
2 files changed, 14 insertions, 0 deletions
diff --git a/mysql-test/r/user_var.result b/mysql-test/r/user_var.result
index d82c17b0fe0..d8425899b77 100644
--- a/mysql-test/r/user_var.result
+++ b/mysql-test/r/user_var.result
@@ -193,3 +193,10 @@ set @var= NULL ;
select FIELD( @var,'1it','Hit') as my_column;
my_column
0
+select @v, coercibility(@v);
+@v coercibility(@v)
+NULL 2
+set @v1=null, @v2=1, @v3=1.1, @v4=now();
+select coercibility(@v1),coercibility(@v2),coercibility(@v3),coercibility(@v4);
+coercibility(@v1) coercibility(@v2) coercibility(@v3) coercibility(@v4)
+2 2 2 2
diff --git a/mysql-test/t/user_var.test b/mysql-test/t/user_var.test
index 2f526dc9a46..cfeb5f228a7 100644
--- a/mysql-test/t/user_var.test
+++ b/mysql-test/t/user_var.test
@@ -122,3 +122,10 @@ drop table t1;
#
set @var= NULL ;
select FIELD( @var,'1it','Hit') as my_column;
+
+#
+# Bug#9425 A user variable doesn't always have implicit coercibility
+#
+select @v, coercibility(@v);
+set @v1=null, @v2=1, @v3=1.1, @v4=now();
+select coercibility(@v1),coercibility(@v2),coercibility(@v3),coercibility(@v4);