PostgreSQL (Database service)

PostgreSQL is a high-performance, standards-compliant relational SQL database.

See the PostgreSQL documentation for more information.

Supported versions

You can select the major version. But the latest compatible minor version is applied automatically and can’t be overridden.

Patch versions are applied periodically for bug fixes and the like. When you deploy your app, you always get the latest available patches.

Note

You can’t upgrade to PostgreSQL 12 with the postgis extension enabled. For more details, see how to upgrade to PostgreSQL 12 with postgis.

Deprecated versions

The following versions are deprecated. They’re available, but they aren’t receiving security updates from upstream and aren’t guaranteed to work. They’ll be removed in the future, so migrate to one of the supported versions.

Relationship reference

For each service defined via a relationship to your application, Upsun automatically generates corresponding environment variables within your application container, in the $<RELATIONSHIP-NAME>_<SERVICE-PROPERTY> format.

Here is example information available through the service environment variables themselves, or through the PLATFORM_RELATIONSHIPS environment variable.

Service environment variables
PLATFORM_RELATIONSHIPS environment variable

You can obtain the complete list of available service environment variables in your app container by running upsun ssh env.

Note that the information about the relationship can change when an app is redeployed or restarted or the relationship is changed. So your apps should only rely on the service environment variables directly rather than hard coding any values.

POSTGRESQL_USERNAME=main
POSTGRESQL_SCHEME=pgsql
POSTGRESQL_SERVICE=postgresql
POSTGRESQL_FRAGMENT=
POSTGRESQL_IP=123.456.78.90
POSTGRESQL_HOSTNAME=azertyuiopqsdfghjklm.postgresql.service._.eu-1.platformsh.site
POSTGRESQL_PORT=5432
POSTGRESQL_CLUSTER=azertyuiopqsdf-main-afdwftq
POSTGRESQL_EPOCH=0
POSTGRESQL_HOST=postgresql.internal
POSTGRESQL_REL=postgresql
POSTGRESQL_PATH=main
POSTGRESQL_QUERY={'is_master': True}
POSTGRESQL_PASSWORD=ChangeMe
POSTGRESQL_TYPE=postgresql:16
POSTGRESQL_PUBLIC=false
POSTGRESQL_HOST_MAPPED=false

For some advanced use cases, you can use the PLATFORM_RELATIONSHIPS environment variable. The structure of the PLATFORM_RELATIONSHIPS environment variable can be obtained by running upsun relationships in your terminal:

{
    "username": "main",
    "scheme": "pgsql",
    "service": "postgresql",
    "fragment": null,
    "ip": "123.456.78.90",
    "hostname": "azertyuiopqsdfghjklm.postgresql.service._.eu-1.platformsh.site",
    "port": 5432,
    "cluster": "azertyuiopqsdf-main-afdwftq",
    "host": "postgresql.internal",
    "rel": "postgresql",
    "path": "main",
    "query": {
        "is_master": true
    },
    "password": "ChangeMe",
    "type": "postgresql:16",
    "public": false,
    "host_mapped": false
}

Here is an example of how to gather PLATFORM_RELATIONSHIPS environment variable information in a .environment file:

.environment

# Decode the built-in credentials object variable.
export RELATIONSHIPS_JSON=$(echo $PLATFORM_RELATIONSHIPS | base64 --decode)

# Set environment variables for individual credentials.
export APP_POSTGRESQL_HOST="$(echo $RELATIONSHIPS_JSON | jq -r '.postgresql[0].host')"

Usage example

1. Configure the service

To define the service, use the postgresql type:

.upsun/config.yaml

services:
    # The name of the service container. Must be unique within a project.
    <SERVICE_NAME>:
        type: postgresql:<VERSION>

Note that changing the name of the service replaces it with a brand new service and all existing data is lost. Back up your data before changing the service.

2. Add the relationship

To define the relationship, use the following configuration:

.upsun/config.yaml

applications:
    # The name of the app container. Must be unique within a project.
    <APP_NAME>:
        # Relationships enable access from this app to a given service.
        # The example below shows simplified configuration leveraging a default service
        # (identified from the relationship name) and a default endpoint.
        # See the Application reference for all options for defining relationships and endpoints.
        relationships:
            <SERVICE_NAME>: 
services:
    # The name of the service container. Must be unique within a project.
    <SERVICE_NAME>:
        type: postgresql:<VERSION>

You can define <SERVICE_NAME> as you like, so long as it’s unique between all defined services and matches in both the application and services configuration.

The example above leverages default endpoint configuration for relationships. That is, it uses default endpoints behind-the-scenes, providing a relationship (the network address a service is accessible from) that is identical to the name of that service.

Depending on your needs, instead of default endpoint configuration, you can use explicit endpoint configuration.

With the above definition, the application container (<APP_NAME>) now has access to the service via the relationship <RELATIONSHIP_NAME> and its corresponding service environment variables.

For PHP, enable the extension for the service:

.upsun/config.yaml

applications:
    # The name of the app container. Must be unique within a project.
    <APP_NAME>:
       # PHP extensions.
        runtime:
            extensions:
                - pdo_pgsql
         # Relationships enable access from this app to a given service.
        # The example below shows simplified configuration leveraging a default service
        # (identified from the relationship name) and a default endpoint.
        # See the Application reference for all options for defining relationships and endpoints.
        relationships:
            <SERVICE_NAME>: 

services:
    # The name of the service container. Must be unique within a project.
    <SERVICE_NAME>:
        type: postgresql:<VERSION>

Example Configuration

App and Service configuration

.upsun/config.yaml

applications:
    # The name of the app container. Must be unique within a project.
    myapp:
        # Relationships enable access from this app to a given service.
        # The example below shows simplified configuration leveraging a default service
        # (identified from the relationship name) and a default endpoint.
        # See the Application reference for all options for defining relationships and endpoints.
        relationships:
            postgresql: 

services:
    # The name of the service container. Must be unique within a project.
    postgresql:
        type: postgresql:16

Use in app

To use the configured service in your app, add a configuration file similar to the following to your project.

.upsun/config.yaml

applications:
    # The name of the app container. Must be unique within a project.
    myapp:
        # The location of the application's code.
        source:
            root: "myapp"

        [...]

        # Relationships enable an app container's access to a service.
        relationships:
            postgresql:

services:
    # The name of the service container. Must be unique within a project.
    postgresql:
        type: postgresql:16

This configuration defines a single application (myapp), whose source code exists in the <PROJECT_ROOT>/myapp directory.
myapp has access to the postgresql service, via a relationship whose name is identical to the service name (as per default endpoint configuration for relationships).

From this, myapp can retrieve access credentials to the service through the relationship environment variables.

myapp/.environment

# Set environment variables for individual credentials.
# For more information, please visit https://docs.upsun.com/development/variables.html#service-environment-variables.
export DB_CONNECTION="${POSTGRESQL_SCHEME}"
export DB_USERNAME="${POSTGRESQL_USERNAME}"
export DB_PASSWORD="${POSTGRESQL_PASSWORD}"
export DB_HOST="${POSTGRESQL_HOST}"
export DB_PORT="${POSTGRESQL_PORT}"
export DB_DATABASE="${POSTGRESQL_PATH}"

# Surface connection string variable for use in app.
export DATABASE_URL="${DB_CONNECTION}://${DB_USERNAME}:${DB_PASSWORD}@${DB_HOST}:${DB_PORT}/${DB_DATABASE}"

The above file — .environment in the myapp directory — is automatically sourced by Upsun into the runtime environment, so that the variable DATABASE_URL can be used within the application to connect to the service.

Note that DATABASE_URL, and all Upsun-service environment variables like POSTGRESQL_HOST, are environment-dependent. Unlike the build produced for a given commit, they can’t be reused across environments and only allow your app to connect to a single service instance on a single environment.

A file very similar to this is generated automatically for your when using the upsun ify command to migrate a codebase to Upsun.

Access the service directly

Access the service using the Upsun CLI by running upsun sql.

You can also access it from your app container via SSH. From your relationship data, you need: POSTGRESQL_USERNAME, POSTGRESQL_HOST, and POSTGRESQL_PORT. Then run the following command:

psql -U POSTGRESQL_USERNAME -h POSTGRESQL_HOST -p POSTGRESQL_PORT

Using the values from the example, that would be:

psql -U main -h postgresql.internal -p 5432

You can obtain the complete list of available service environment variables in your app container by running upsun ssh env.

Exporting data

The easiest way to download all data in a PostgreSQL instance is with the Upsun CLI. If you have a single SQL database, the following command exports all data using the pg_dump command to a local file:

upsun db:dump

If you have multiple SQL databases it prompts you which one to export. You can also specify one by relationship name explicitly:

upsun db:dump --relationship postgresql

By default the file is uncompressed. If you want to compress it, use the --gzip (-z) option:

upsun db:dump --gzip

You can use the --stdout option to pipe the result to another command. For example, if you want to create a bzip2-compressed file, you can run:

upsun db:dump --stdout | bzip2 > dump.sql.bz2

Importing data

Make sure that the imported file contains objects with cleared ownership and IF EXISTS clauses. For example, you can create a DB dump with following parameters:

pg_dump --no-owner --clean --if-exists

The easiest way to load data into a database is to pipe an SQL dump through the upsun sql command, like so:

upsun sql < my_database_backup.sql

That runs the database backup against the SQL database on Upsun. That works for any SQL file, so the usual caveats about importing an SQL dump apply (for example, it’s best to run against an empty database). As with exporting, you can also specify a specific environment to use and a specific database relationship to use, if there are multiple.

upsun sql --relationship postgresql -e BRANCH_NAME < my_database_backup.sql

Note

Importing a database backup is a destructive operation. It overwrites data already in your database. Taking a backup or a database export before doing so is strongly recommended.

Sanitizing data

To ensure people who review code changes can’t access personally identifiable information stored in your database, sanitize your preview environments.

Multiple databases

If you are using version 10, 11, 12, 13, or later of this service, it’s possible to define multiple databases as well as multiple users with different permissions. To do so requires defining multiple endpoints. Under the configuration key of your service there are two additional keys:

databases: This is a YAML array listing the databases that should be created. If not specified, a single database named main is created.

Note that removing a schema from the list of schemas on further deployments results in the deletion of the schema.
endpoints: This is a nested YAML object defining different credentials. Each endpoint may have access to one or more schemas (databases), and may have different levels of permission for each. The valid permission levels are:
- ro: Using this endpoint only SELECT queries are allowed.
- rw: Using this endpoint SELECT queries as well as INSERT/UPDATE/DELETE queries are allowed.
- admin: Using this endpoint all queries are allowed, including DDL queries (CREATE TABLE, DROP TABLE, etc.).

Consider the following illustrative example:

.upsun/config.yaml

services:
    # The name of the service container. Must be unique within a project.
    postgresql:
        type: "postgresql:16"
        configuration:
            databases:
                - main
                - legacy
            endpoints:
                admin:
                    privileges:
                        main: admin
                        legacy: admin
                reporter:
                    default_database: main
                    privileges:
                        main: ro
                importer:
                    default_database: legacy
                    privileges:
                        legacy: rw

This example creates a single PostgreSQL service named postgresql. The server has two databases, main and legacy with three endpoints created.

admin: has full access to both databases.
reporter: has SELECT query access to the main database, but no access to legacy.
importer: has SELECT/INSERT/UPDATE/DELETE access (but not DDL access) to the legacy database. It doesn’t have access to main.

If a given endpoint has access to multiple databases you should also specify which is listed by default in the relationships array. If one isn’t specified, the path property of the relationship is null. While that may be acceptable for an application that knows the name of the database it’s connecting to, automated tools like the Upsun CLI can’t access the database on that relationship. For that reason, defining the default_database property is always recommended.

Once these endpoints are defined, you need to expose them to your application as a relationship. Continuing with the above example, your relationships in .upsun/config.yaml might look like:

.upsun/config.yaml

applications:
    # The name of the app container. Must be unique within a project.
    myapp:

        source:
            root: "/"

        [...]

        relationships:
            database: 
                service: postgresql
                endpoint: admin
            reports: 
                service: postgresql
                endpoint: reporter
            imports:
                service: postgresql
                endpoint: importer

services:
    # The name of the service container. Must be unique within a project.
    postgresql:
        type: "postgresql:16"
        configuration:
            databases:
                - main
                - legacy
            endpoints:
                admin:
                    privileges:
                        main: admin
                        legacy: admin
                reporter:
                    default_database: main
                    privileges:
                        main: ro
                importer:
                    default_database: legacy
                    privileges:
                        legacy: rw

Each database is accessible to your application through the database, reports, and imports relationships. They’ll be available in the service environment variables and all have the same structure documented above, but with different credentials. You can use those to connect to the appropriate database with the specified restrictions using whatever the SQL access tools are for your language and application.

A service configuration without the configuration block defined is equivalent to the following default values:

.upsun/config.yaml

services:
    # The name of the service container. Must be unique within a project.
    postgresql:
        type: "postgresql:16"
        configuration:
            databases:
                - main
            endpoints:
                postgresql:
                    default_database: main
                    privileges:
                        main: admin

If you do not define database but endpoints are defined, then the single database main is created with the following assumed configuration:

.upsun/config.yaml

services:
    # The name of the service container. Must be unique within a project.
    postgresql:
        type: "postgresql:16"
        configuration:
            databases:
                - main
            endpoints: <your configuration>

Alternatively, if you define multiple databases but no endpoints, a single user main is created with admin access to each of your databases, equivalent to the configuration below:

.upsun/config.yaml

services:
    # The name of the service container. Must be unique within a project.
    postgresql:
        type: "postgresql:16"
        configuration:
            databases:
                - firstdb
                - seconddb
                - thirddb
            endpoints:
                main:
                    firstdb: admin
                    seconddb: admin
                    thirddb: admin

Password generation

When you connect your app to a database, an empty password is generated for the database by default. This can cause issues with your app.

To generate real passwords for your database, define custom endpoints in your service configuration. For each custom endpoint you create, you get an automatically generated password, similarly to when you create multiple databases. Note that you can’t customize these automatically generated passwords.

After your custom endpoints are exposed as relationships in your app configuration, you can retrieve the password for each endpoint through the service environment variables within your application containers. The password value changes automatically over time, to avoid downtime its value has to be read dynamically by your app. Globally speaking, having passwords hard-coded into your codebase can cause security issues and should be avoided.

When you switch from the default configuration with an empty password to custom endpoints, make sure your service name remains unchanged. Failure to do so results in the creation of a new service, which removes any existing data from your database.

Service timezone

To change the timezone for the current session, run SET TIME ZONE TIMEZONE;.

Extensions

Upsun supports a number of PostgreSQL extensions. To enable them, list them under the configuration.extensions key in your .upsun/config.yaml file, like so:

.upsun/config.yaml

services:
    # The name of the service container. Must be unique within a project.
    postgresql:
        type: "postgresql:16"
        configuration:
            extensions:
                - pg_trgm
                - hstore

In this case, you have pg_trgm installed, providing functions to determine the similarity of text based on trigram matching, and hstore providing a key-value store.

Available extensions

The following is the extensive list of supported extensions. Note that you can’t currently add custom extensions not listed here.

address_standardizer - Used to parse an address into constituent elements. Generally used to support geocoding address normalization step.
address_standardizer_data_us - For standardizing addresses based on US dataset example
adminpack - administrative functions for PostgreSQL
autoinc - functions for auto-incrementing fields
bloom - bloom access method - signature file based index (requires 9.6 or higher)
btree_gin - support for indexing common data types in GIN
btree_gist - support for indexing common data types in GiST
chkpass - data type for auto-encrypted passwords
citext - data type for case-insensitive character strings
cube - data type for multidimensional cubes
dblink - connect to other PostgreSQL databases from within a database
dict_int - text search dictionary template for integers
dict_xsyn - text search dictionary template for extended synonym processing
earthdistance - calculate great-circle distances on the surface of the Earth
file_fdw - foreign-data wrapper for flat file access
fuzzystrmatch - determine similarities and distance between strings
hstore - data type for storing sets of (key, value) pairs
insert_username - functions for tracking who changed a table
intagg - integer aggregator and enumerator (obsolete)
intarray - functions, operators, and index support for 1-D arrays of integers
isn - data types for international product numbering standards
lo - Large Object maintenance
ltree - data type for hierarchical tree-like structures
moddatetime - functions for tracking last modification time
pageinspect - inspect the contents of database pages at a low level
pg_buffercache - examine the shared buffer cache
pg_freespacemap - examine the free space map (FSM)
pg_prewarm - prewarm relation data (requires 9.6 or higher)
pg_stat_statements - track execution statistics of all SQL statements executed
pg_trgm - text similarity measurement and index searching based on trigrams
pg_visibility - examine the visibility map (VM) and page-level visibility info (requires 9.6 or higher)
pgcrypto - cryptographic functions
pgrouting - pgRouting Extension (requires 9.6 or higher)
pgrowlocks - show row-level locking information
pgstattuple - show tuple-level statistics
plpgsql - PL/pgSQL procedural language
postgis - PostGIS geometry, geography, and raster spatial types and functions
postgis_sfcgal - PostGIS SFCGAL functions
postgis_tiger_geocoder - PostGIS tiger geocoder and reverse geocoder
postgis_topology - PostGIS topology spatial types and functions
postgres_fdw - foreign-data wrapper for remote PostgreSQL servers
refint - functions for implementing referential integrity (obsolete)
seg - data type for representing line segments or floating-point intervals
sslinfo - information about SSL certificates
tablefunc - functions that manipulate whole tables, including crosstab
tcn - Triggered change notifications
timetravel - functions for implementing time travel
tsearch2 - compatibility package for pre-8.3 text search functions (obsolete, only available for 9.6 and 9.3)
tsm_system_rows - TABLESAMPLE method which accepts number of rows as a limit (requires 9.6 or higher)
tsm_system_time - TABLESAMPLE method which accepts time in milliseconds as a limit (requires 9.6 or higher)
unaccent - text search dictionary that removes accents
uuid-ossp - generate universally unique identifiers (UUIDs)
vector - Open-source vector similarity search for PostgreSQL 11+
xml2 - XPath querying and XSLT

Note

You can’t upgrade to PostgreSQL 12 with the postgis extension enabled. For more details, see how to upgrade to PostgreSQL 12 with postgis.

Notes

Could not find driver

If you see this error: Fatal error: Uncaught exception 'PDOException' with message 'could not find driver', this means you are missing the pdo_pgsql PHP extension. You need to enable it in your .upsun/config.yaml (see above).

Upgrading

PostgreSQL 10 and later include an upgrade utility that can convert databases from previous versions to version 10 or later. If you upgrade your service from a previous version of PostgreSQL to version 10 or above, it upgrades automatically.

The utility can’t upgrade PostgreSQL 9 versions, so upgrades from PostgreSQL 9.3 to 9.6 aren’t supported. Upgrade straight to version 11 instead.

Note

Make sure you first test your migration on a separate branch.

Also, be sure to take a backup of your production environment before you merge this change.

Warning

Downgrading isn’t supported. If you need to downgrade, dump to SQL, remove the service, recreate the service, and import your dump.

Upgrade to PostgreSQL 12 with the `postgis` extension

You can’t upgrade to PostgreSQL 12 with the postgis extension enabled. It involves a change to a major version that results in a failed deployment that requires support intervention to fix. Upgrading from 12 to a higher version is possible.

If you need to upgrade to version 12, follow the same steps recommended for downgrading:

Dump the database.
Remove the service.
Create a new service with PostgreSQL 12.
Import the dump to that service.

Integrated environments

Supported environments

PostgreSQL (Database service)

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Supported versions

Note

Deprecated versions

Relationship reference

Usage example

1. Configure the service

2. Add the relationship

Example Configuration

App and Service configuration

Use in app

Access the service directly

Exporting data

Importing data

Note

Sanitizing data

Multiple databases

Password generation

Service timezone

Extensions

Available extensions

Note

Notes

Could not find driver

Upgrading

Note

Warning

Upgrade to PostgreSQL 12 with the `postgis` extension

Is this page helpful?

PostgreSQL (Database service)

On this page

Is this page helpful?

Sign up

Supported versions

Note

Deprecated versions

Relationship reference

Usage example

1. Configure the service

2. Add the relationship

Example Configuration

App and Service configuration

Use in app

Access the service directly

Exporting data

Importing data

Note

Sanitizing data

Multiple databases

Password generation

Service timezone

Extensions

Available extensions

Note

Notes

Could not find driver

Upgrading

Note

Warning

Upgrade to PostgreSQL 12 with the postgis extension

Is this page helpful?

Upgrade to PostgreSQL 12 with the `postgis` extension