YDB database support

Makefile

@@ -1,5 +1,5 @@
 SOURCE ?= file go_bindata github github_ee bitbucket aws_s3 google_cloud_storage godoc_vfs gitlab
-DATABASE ?= postgres mysql redshift cassandra spanner cockroachdb yugabytedb clickhouse mongodb sqlserver firebird neo4j pgx pgx5 rqlite
+DATABASE ?= postgres mysql redshift cassandra spanner cockroachdb yugabytedb clickhouse mongodb sqlserver firebird neo4j pgx pgx5 rqlite ydb
 DATABASE_TEST ?= $(DATABASE) sqlite sqlite3 sqlcipher
 VERSION ?= $(shell git describe --tags 2>/dev/null | cut -c 2-)
 TEST_FLAGS ?=

README.md

@@ -44,6 +44,7 @@ Database drivers run migrations. [Add a new database?](database/driver.go)
 * [Firebird](database/firebird)
 * [MS SQL Server](database/sqlserver)
 * [rqlite](database/rqlite)
+* [YDB](database/ydb)
 
 ### Database URLs
 

database/ydb/README.md

@@ -0,0 +1,48 @@
+# [YDB](https://ydb.tech/docs/)
+
+`ydb://[user:password@]host:port/database?QUERY_PARAMS`
+
+| URL Query  |               Description               |
+|:----------:|:---------------------------------------:|
+|   `user`   |         The user to sign in as.         |
+| `password` |          The user's password.           | 
+|   `host`   |         The host to connect to.         |
+|   `port`   |          The port to bind to.           |                                     
+| `database` | The name of the database to connect to. |
+
+|       URL Query Params       |                                         Description                                          |
+|:----------------------------:|:--------------------------------------------------------------------------------------------:|
+|        `x-auth-token`        |                                    Authentication token.                                     |
+|     `x-migrations-table`     |                 Name of the migrations table (default `schema_migrations`).                  |
+|        `x-lock-table`        |        Name of the table which maintains the migration lock (default `schema_lock`).         |
+|        `x-use-grpcs`         |                  Enables gRPCS protocol for YDB connections (default grpc).                  |
+|          `x-tls-ca`          |                     The location of the CA (certificate authority) file.                     |
+| `x-tls-insecure-skip-verify` |       Controls whether a client verifies the server's certificate chain and host name.       |
+|     `x-tls-min-version`      | Controls the minimum TLS version that is acceptable, use 1.0, 1.1, 1.2 or 1.3 (default 1.2). |
+
+### Secure connection
+
+Query param `x-use-grpcs` enables secure TLS connection that requires certificates.
+You can declare root certificate using ENV
+variable: `export YDB_SSL_ROOT_CERTIFICATES_FILE=/path/to/ydb/certs/CA.pem` or
+by using `x-tls-ca` query param: `?x-tls-ca=/path/to/ydb/certs/CA.pem`.
+
+### Authentication
+
+By default, golang-migrate connects to YDB
+using [anonymous credentials](https://ydb.tech/docs/en/recipes/ydb-sdk/auth-anonymous). \
+Through the url query, you can change the default behavior:
+
+- To connect to YDB using [static credentials](https://ydb.tech/docs/en/recipes/ydb-sdk/auth-static) you need to specify
+  username and password:
+  `ydb://user:password@host:port/database`
+- To connect to YDB using [token](https://ydb.tech/docs/en/recipes/ydb-sdk/auth-access-token) you need to specify token
+  as query parameter:
+  `ydb://host:port/database?x-auth-token=<YDB_TOKEN>`
+
+### Locks
+
+If golang-migrate fails to acquire the lock and no migrations are currently running.
+This may indicate that one of the migrations did not complete successfully.
+In this case, you need to analyze the previous migrations, rollback if necessary, and manually remove the lock from the
+`x-lock-table`. 

database/ydb/examples/migrations/001_create_users.down.sql

@@ -0,0 +1 @@
+DROP TABLE `test/users`;

database/ydb/examples/migrations/001_create_users.up.sql

@@ -0,0 +1,6 @@
+CREATE TABLE `test/users` (
+    id Uint64,
+    name String,
+    email String,
+    PRIMARY KEY (id)
+);

database/ydb/examples/migrations/002_add_city_to_users.down.sql

@@ -0,0 +1,3 @@
+DROP TABLE `test/cities`;
+
+ALTER TABLE `test/users` DROP COLUMN city;

database/ydb/examples/migrations/002_add_city_to_users.up.sql

@@ -0,0 +1,7 @@
+CREATE TABLE `test/cities` (
+    id Uint64,
+    name String,
+    PRIMARY KEY (id)
+);
+
+ALTER TABLE `test/users` ADD COLUMN city Uint64;

database/ydb/examples/migrations/003_create_topic.down.sql

@@ -0,0 +1 @@
+DROP TOPIC `test/topic`;

database/ydb/examples/migrations/003_create_topic.up.sql

@@ -0,0 +1 @@
+CREATE TOPIC `test/topic`;

database/ydb/examples/migrations/004_add_index_on_user_emails.down.sql

@@ -0,0 +1 @@
+ALTER TABLE `test/users` DROP INDEX `users_email_index`;

database/ydb/examples/migrations/004_add_index_on_user_emails.up.sql

@@ -0,0 +1 @@
+ALTER TABLE `test/users` ADD INDEX `users_email_index` GLOBAL UNIQUE ON (`email`);

database/ydb/examples/migrations/005_create_books_table.down.sql

@@ -0,0 +1 @@
+DROP TABLE `test/books`;

database/ydb/examples/migrations/005_create_books_table.up.sql

@@ -0,0 +1,6 @@
+CREATE TABLE `test/books` (
+  user_id Uint64,
+  name    Text,
+  author  Text,
+  PRIMARY KEY (user_id)
+);

database/ydb/examples/migrations/006_create_movies_table.down.sql

@@ -0,0 +1 @@
+DROP TABLE `test/movies`;

database/ydb/examples/migrations/006_create_movies_table.up.sql

@@ -0,0 +1,6 @@
+CREATE TABLE `test/movies` (
+  user_id   Uint64,
+  name      Text,
+  director  Text,
+  PRIMARY KEY (user_id)
+);