1# postgres
2
3`postgres://user:password@host:port/dbname?query` (`postgresql://` works, too)
4
5| URL Query | WithInstance Config | Description |
6|------------|---------------------|-------------|
7| `x-migrations-table` | `MigrationsTable` | Name of the migrations table |
8| `x-migrations-table-quoted` | `MigrationsTableQuoted` | By default, migrate quotes the migration table for SQL injection safety reasons. This option disable quoting and naively checks that you have quoted the migration table name. e.g. `"my_schema"."schema_migrations"` |
9| `x-statement-timeout` | `StatementTimeout` | Abort any statement that takes more than the specified number of milliseconds |
10| `x-multi-statement` | `MultiStatementEnabled` | Enable multi-statement execution (default: false) |
11| `x-multi-statement-max-size` | `MultiStatementMaxSize` | Maximum size of single statement in bytes (default: 10MB) |
12| `dbname` | `DatabaseName` | The name of the database to connect to |
13| `search_path` | | This variable specifies the order in which schemas are searched when an object is referenced by a simple name with no schema specified. |
14| `user` | | The user to sign in as |
15| `password` | | The user's password |
16| `host` | | The host to connect to. Values that start with / are for unix domain sockets. (default is localhost) |
17| `port` | | The port to bind to. (default is 5432) |
18| `fallback_application_name` | | An application_name to fall back to if one isn't provided. |
19| `connect_timeout` | | Maximum wait for connection, in seconds. Zero or not specified means wait indefinitely. |
20| `sslcert` | | Cert file location. The file must contain PEM encoded data. |
21| `sslkey` | | Key file location. The file must contain PEM encoded data. |
22| `sslrootcert` | | The location of the root certificate file. The file must contain PEM encoded data. |
23| `sslmode` | | Whether or not to use SSL (disable\|require\|verify-ca\|verify-full) |
24
25
26## Upgrading from v1
27
281. Write down the current migration version from schema_migrations
291. `DROP TABLE schema_migrations`
302. Wrap your existing migrations in transactions ([BEGIN/COMMIT](https://www.postgresql.org/docs/current/static/transaction-iso.html)) if you use multiple statements within one migration.
313. Download and install the latest migrate version.
324. Force the current migration version with `migrate force <current_version>`.
33
34## Multi-statement mode
35
36In PostgreSQL running multiple SQL statements in one `Exec` executes them inside a transaction. Sometimes this
37behavior is not desirable because some statements can be only run outside of transaction (e.g.
38`CREATE INDEX CONCURRENTLY`). If you want to use `CREATE INDEX CONCURRENTLY` without activating multi-statement mode
39you have to put such statements in a separate migration files.
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