vendor: upgrade go-mysql-server (#810)

vendor: upgrade go-mysql-server

Author: ajnavarro

Gopkg.lock

@@ -1,6 +1,6 @@
 [[constraint]]
   name = "gopkg.in/src-d/go-mysql-server.v0"
-  revision = "cb312768e257cb41e669331551e29e8a081e85b5"
+  revision = "756e3bf963ce82ba27d5c86f936815eeb4b5e736"
 
 [[constraint]]
   name = "github.com/jessevdk/go-flags"

Gopkg.toml

@@ -26,4 +26,4 @@ and for the second query also two indexes will be used and the result will be a
 
 You can find some more examples in the [examples](./examples.md#create-an-index-for-columns-on-a-table) section.
 
-See [go-mysql-server](https://github.com/src-d/go-mysql-server/tree/cb312768e257cb41e669331551e29e8a081e85b5#indexes) documentation for more details
+See [go-mysql-server](https://github.com/src-d/go-mysql-server/tree/756e3bf963ce82ba27d5c86f936815eeb4b5e736#indexes) documentation for more details

docs/using-gitbase/indexes.md

@@ -347,13 +347,15 @@ func TestIntegration(t *testing.T) {
 		},
 	}
 
+	var pid uint64
 	runTests := func(t *testing.T) {
 		for _, tt := range testCases {
 			t.Run(tt.query, func(t *testing.T) {
 				require := require.New(t)
 
 				session := gitbase.NewSession(pool)
-				ctx := sql.NewContext(context.TODO(), sql.WithSession(session))
+				ctx := sql.NewContext(context.TODO(), sql.WithSession(session), sql.WithPid(pid))
+				pid++
 
 				_, iter, err := engine.Query(ctx, tt.query)
 				require.NoError(err)

integration_test.go

@@ -41,6 +41,9 @@ func TestAnalyzeSquashJoinsExchange(t *testing.T) {
 	project, ok := exchange.Child.(*plan.Project)
 	require.True(ok)
 
+	project, ok = project.Child.(*plan.Project)
+	require.True(ok)
+
 	rt, ok := project.Child.(*plan.ResolvedTable)
 	require.True(ok)
 
@@ -78,6 +81,9 @@ func TestAnalyzeSquashNaturalJoins(t *testing.T) {
 	project, ok := exchange.Child.(*plan.Project)
 	require.True(ok)
 
+	project, ok = project.Child.(*plan.Project)
+	require.True(ok)
+
 	filter, ok := project.Child.(*plan.Filter)
 	require.True(ok)