endtoend: add tests for INTERSECT and EXCEPT

Author: aitva

internal/endtoend/testdata/select_union/mysql/go/query.sql.go

@@ -4,3 +4,13 @@ CREATE TABLE foo (a text, b text);
 SELECT * FROM foo
 UNION
 SELECT * FROM foo;
+
+-- name: SelectExcept :many
+SELECT * FROM foo
+EXCEPT
+SELECT * FROM foo;
+
+-- name: SelectIntersect :many
+SELECT * FROM foo
+INTERSECT
+SELECT * FROM foo;

internal/endtoend/testdata/select_union/mysql/query.sql

@@ -4,3 +4,13 @@ CREATE TABLE foo (a text, b text);
 SELECT * FROM foo
 UNION
 SELECT * FROM foo;
+
+-- name: SelectExcept :many
+SELECT * FROM foo
+EXCEPT
+SELECT * FROM foo;
+
+-- name: SelectIntersect :many
+SELECT * FROM foo
+INTERSECT
+SELECT * FROM foo;