From c0deedcf48bad892f9f8b69b0d091c83ca736934 Mon Sep 17 00:00:00 2001
From: Alex Snast <alexsn@fb.com>
Date: Tue, 13 Aug 2019 02:09:45 -0700
Subject: [PATCH] set default mysql table collation to utf8mb4_bin (#1295)

Summary:
Pull Request resolved: https://github.com/facebookexternal/fbc/pull/1295

Pull Request resolved: https://github.com/facebookincubator/ent/pull/13

See [Case Sensitivity in String Searches](https://dev.mysql.com/doc/refman/5.7/en/case-sensitivity.html)

Reviewed By: a8m

Differential Revision: D16782072

fbshipit-source-id: f2a836e580757f0e956a444c3fdf93c502723098
---
 dialect/sql/schema/schema.go         |  6 +++---
 entc/integration/integration_test.go | 10 ++++++++++
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/dialect/sql/schema/schema.go b/dialect/sql/schema/schema.go
index 245f48b38..bcc281e0a 100644
--- a/dialect/sql/schema/schema.go
+++ b/dialect/sql/schema/schema.go
@@ -77,9 +77,9 @@ func (t *Table) MySQL(version string) *sql.TableBuilder {
 	for _, pk := range t.PrimaryKey {
 		b.PrimaryKey(pk.Name)
 	}
-	// default character set to MySQL table.
-	// columns can be override using the "Charset" field.
-	b.Charset("utf8mb4")
+	// default charset / collation on MySQL table.
+	// columns can be override using the Charset / Collate fields.
+	b.Charset("utf8mb4").Collate("utf8mb4_bin")
 	return b
 }
 
diff --git a/entc/integration/integration_test.go b/entc/integration/integration_test.go
index efd4ce52a..c0a9c9eb9 100644
--- a/entc/integration/integration_test.go
+++ b/entc/integration/integration_test.go
@@ -100,6 +100,7 @@ var tests = []func(*testing.T, *ent.Client){
 	Sanity,
 	Paging,
 	Charset,
+	Collation,
 	Relation,
 	Predicate,
 	UniqueConstraint,
@@ -245,6 +246,15 @@ func Charset(t *testing.T, client *ent.Client) {
 	require.Equal("Nati", f4.Name)
 }
 
+func Collation(t *testing.T, client *ent.Client) {
+	require := require.New(t)
+	ctx := context.Background()
+	_ = client.File.Create().SetName("Foo").SaveX(ctx)
+	query := client.File.Query().Where(file.Name("foo"))
+	require.False(query.ExistX(ctx))
+	require.Nil(query.FirstX(ctx))
+}
+
 func Predicate(t *testing.T, client *ent.Client) {
 	require := require.New(t)
 	ctx := context.Background()