Merge branch '2.3' into 2

DEP Bump minimum version of framework

.github/workflows/ci.yml

@@ -0,0 +1,25 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  ci:
+    name: CI
+    uses: silverstripe/gha-ci/.github/workflows/ci.yml@v1
+    with:
+      # set phpunit to false to prevent automatic generation of mysql phpunit jobs
+      phpunit: false
+      extra_jobs: |
+        - php: 7.4
+          db: pgsql
+          phpunit: true
+          composer_args: --prefer-lowest
+        - php: 8.0
+          db: pgsql
+          phpunit: true
+        - php: 8.1
+          db: pgsql
+          phpunit: true

.github/workflows/dispatch-ci.yml

@@ -0,0 +1,16 @@
+name: Dispatch CI
+
+on:
+  # At 12:20 PM UTC, only on Thursday and Friday
+  schedule:
+    - cron: '20 12 * * 4,5'
+
+jobs:
+  dispatch-ci:
+    name: Dispatch CI
+    # Only run cron on the silverstripe account
+    if: (github.event_name == 'schedule' && github.repository_owner == 'silverstripe') || (github.event_name != 'schedule')
+    runs-on: ubuntu-latest
+    steps:
+      - name: Dispatch CI
+        uses: silverstripe/gha-dispatch-ci@v1

.github/workflows/keepalive.yml

@@ -0,0 +1,17 @@
+name: Keepalive
+
+on:
+  workflow_dispatch:
+  # The 4th of every month at 10:50am UTC
+  schedule:
+    - cron: '50 10 4 * *'
+
+jobs:
+  keepalive:
+    name: Keepalive
+    # Only run cron on the silverstripe account
+    if: (github.event_name == 'schedule' && github.repository_owner == 'silverstripe') || (github.event_name != 'schedule')
+    runs-on: ubuntu-latest
+    steps:
+      - name: Keepalive
+        uses: silverstripe/gha-keepalive@v1

.scrutinizer.yml

@@ -1,15 +0,0 @@
-inherit: true
-
-build:
-  nodes:
-    analysis:
-      tests:
-        override: [php-scrutinizer-run]
-
-checks:
-  php:
-    code_rating: true
-    duplication: true
-
-filter:
-  paths: [code/*, tests/*]

.travis.yml

@@ -1,43 +0,0 @@
-language: php
-
-dist: trusty
-
-cache:
-  directories:
-    - $HOME/.composer/cache/files
-
-php:
-  - 5.6
-
-env:
-  global:
-    - DB="PGSQL"
-
-matrix:
-  fast_finish: true
-  include:
-    - php: 5.6
-      env:
-        - PHPUNIT_TEST=framework
-    - php: 5.6
-      env:
-        - PHPUNIT_TEST=postgresql
-        - PHPCS_TEST=1
-
-before_script:
-# Init PHP
-  - phpenv rehash
-  - phpenv config-rm xdebug.ini
-  - export PATH=~/.composer/vendor/bin:$PATH
-  - echo 'memory_limit = 2048M' >> ~/.phpenv/versions/$(phpenv version-name)/etc/conf.d/travis.ini
-
-# Install composer dependencies
-  - composer validate
-  - composer require --no-update silverstripe/recipe-cms:1.0.x-dev
-  - composer install --prefer-dist --no-interaction --no-progress --no-suggest --optimize-autoloader --verbose --profile
-  - if [[ $PHPCS_TEST ]]; then composer global require squizlabs/php_codesniffer:^3 --prefer-dist --no-interaction --no-progress --no-suggest -o; fi
-
-script:
-  - if [[ $PHPUNIT_TEST == postgresql ]]; then vendor/bin/phpunit ./tests; fi
-  - if [[ $PHPUNIT_TEST == framework ]]; then vendor/bin/phpunit ./vendor/silverstripe/framework/tests/php; fi
-  - if [[ $PHPCS_TEST ]]; then composer run-script lint; fi

README.md

@@ -1,34 +1,54 @@
 # PostgreSQL Module Module
 
-[![Build Status](https://travis-ci.org/silverstripe/silverstripe-postgresql.png?branch=master)](https://travis-ci.org/silverstripe/silverstripe-postgresql)
+[![CI](https://github.com/silverstripe/silverstripe-postgresql/actions/workflows/ci.yml/badge.svg)](https://github.com/silverstripe/silverstripe-postgresql/actions/workflows/ci.yml)
-
+[![Silverstripe supported module](https://img.shields.io/badge/silverstripe-supported-0071C4.svg)](https://www.silverstripe.org/software/addons/silverstripe-commercially-supported-module-list/)
-## Maintainer Contact
-
- * Sam Minnee (Nickname: sminnee) <sam@silverstripe.com>
 
 ## Requirements
 
-* SilverStripe 4.0
+* Silverstripe 4.0
-* PostgreSQL 8.3.x or greater must be installed
+* PostgreSQL >=9.2
-* PostgreSQL <8.3.0 may work if T-Search is manually installed
+* Note: PostgreSQL 10 has not been tested
-*  Known to work on OS X Leopard, Windows Server 2008 R2 and Linux
 
 ## Installation
 
- 1. Install via composer `composer require silverstripe/postgresql` or extract the contents
+```
-    so they reside as a `postgresql` directory inside your SilverStripe project code
+composer require silverstripe/postgresql
- 2. Open the installer by browsing to install.php, e.g. http://localhost/silverstripe/install.php
+```
- 3. Select PostgreSQL in the database list and enter your database details
+
+## Configuration
+
+### Environment file
+
+Add the following settings to your `.env` file:
+
+```
+SS_DATABASE_CLASS=PostgreSQLDatabase
+SS_DATABASE_USERNAME=
+SS_DATABASE_PASSWORD=
+```
+
+See [environment variables](https://docs.silverstripe.org/en/4/getting_started/environment_management) for more details. Note that a database will automatically be created via `dev/build`.
+
+### Through the installer
+
+Open the installer by browsing to install.php, e.g. http://localhost/install.php
+Select PostgreSQL in the database list and enter your database details
 
 ## Usage Overview
 
-See docs/en for more information about configuring the module.
+See [docs/en](docs/en/README.md) for more information about configuring the module.
 	
 ## Known issues
 
 All column and table names must be double-quoted.  PostgreSQL automatically 
 lower-cases columns, and your queries will fail if you don't.
 
+Collations have known issues when installed on Alpine, MacOS X and BSD derivatives
+(see [PostgreSQL FAQ](https://wiki.postgresql.org/wiki/FAQ#Why_do_my_strings_sort_incorrectly.3F)).
+We do not support such installations, although they still may work correctly for you.
+As a workaround for PostgreSQL 10+ you could manually switch to ICU collations (e.g. und-x-icu).
+There are no known workarounds for PostgreSQL <10.
+
 Ts_vector columns are not automatically detected by the built-in search 
 filters.  That means if you're doing a search through the CMS on a ModelAdmin
 object, it will use LIKE queries which are very slow.  If you're writing your 

code/PostgreSQLDatabase.php

@@ -36,6 +36,11 @@ class PostgreSQLDatabase extends Database
      */
     protected $schema;
 
+    /**
+     * @var bool
+     */
+    protected $transactionNesting = 0;
+
     /**
      * Toggle if transactions are supported. Defaults to true.
      *
@@ -362,6 +367,9 @@ class PostgreSQLDatabase extends Database
      */
     public function searchEngine($classesToSearch, $keywords, $start, $pageLength, $sortBy = "ts_rank DESC", $extraFilter = "", $booleanSearch = false, $alternativeFileFilter = "", $invertedMatch = false)
     {
+        $start = (int)$start;
+        $pageLength = (int)$pageLength;
+
         //Fix the keywords to be ts_query compatitble:
         //Spaces must have pipes
         //@TODO: properly handle boolean operators here.
@@ -440,7 +448,7 @@ class PostgreSQLDatabase extends Database
 
             // Could parameterise this, but convention is only to to so for where conditions
             $query->addFrom(array(
-                'tsearch' => ", to_tsquery('" . self::search_language() . "', $keywords) AS q"
+                'q' => ", to_tsquery('" . self::search_language() . "', $keywords)"
             ));
             $query->setSelect(array());
 
@@ -516,6 +524,9 @@ class PostgreSQLDatabase extends Database
 
     public function transactionStart($transaction_mode = false, $session_characteristics = false)
     {
+        if ($this->transactionNesting > 0) {
+            $this->transactionSavepoint('NESTEDTRANSACTION' . $this->transactionNesting);
+        } else {
             $this->query('BEGIN;');
 
             if ($transaction_mode) {
@@ -526,6 +537,8 @@ class PostgreSQLDatabase extends Database
                 $this->query("SET SESSION CHARACTERISTICS AS TRANSACTION {$session_characteristics};");
             }
         }
+        ++$this->transactionNesting;
+    }
 
     public function transactionSavepoint($savepoint)
     {
@@ -534,17 +547,41 @@ class PostgreSQLDatabase extends Database
 
     public function transactionRollback($savepoint = false)
     {
+        // Named savepoint
         if ($savepoint) {
-            $this->query("ROLLBACK TO {$savepoint};");
+            $this->query('ROLLBACK TO ' . $savepoint);
-        } else {
+            return true;
-            $this->query('ROLLBACK;');
         }
+
+        // Abort if unable to unnest, otherwise jump up a level
+        if (!$this->transactionNesting) {
+            return false;
+        }
+        --$this->transactionNesting;
+
+        // Rollback nested
+        if ($this->transactionNesting > 0) {
+            return $this->transactionRollback('NESTEDTRANSACTION' . $this->transactionNesting);
+        }
+
+        // Rollback top level
+        $this->query('ROLLBACK');
+        return true;
+    }
+
+    public function transactionDepth()
+    {
+        return $this->transactionNesting;
     }
 
     public function transactionEnd($chain = false)
     {
+        --$this->transactionNesting;
+        if ($this->transactionNesting <= 0) {
+            $this->transactionNesting = 0;
             $this->query('COMMIT;');
         }
+    }
 
     public function comparisonClause($field, $value, $exact = false, $negate = false, $caseSensitive = null, $parameterised = false)
     {

code/PostgreSQLQuery.php

@@ -18,6 +18,23 @@ class PostgreSQLQuery extends Query
      */
     private $handle;
 
+    private $columnNames = [];
+
+    /**
+     * Mapping of postgresql types to PHP types
+     * Note that the bool => int mapping is by design, designed to mimic MySQL's behaviour
+     * @var array
+     */
+    protected static $typeMapping = [
+        'bool' => 'int',
+        'int2' => 'int',
+        'int4' => 'int',
+        'int8' => 'int',
+        'float4' => 'float',
+        'float8' => 'float',
+        'numeric' => 'float',
+    ];
+
     /**
      * Hook the result-set given into a Query class, suitable for use by sapphire.
      * @param resource $handle the internal Postgres handle that is points to the resultset.
@@ -25,6 +42,11 @@ class PostgreSQLQuery extends Query
     public function __construct($handle)
     {
         $this->handle = $handle;
+
+        $numColumns = pg_num_fields($handle);
+        for ($i = 0; $i<$numColumns; $i++) {
+            $this->columnNames[$i] = pg_field_name($handle, $i);
+        }
     }
 
     public function __destruct()
@@ -36,8 +58,10 @@ class PostgreSQLQuery extends Query
 
     public function seek($row)
     {
-        pg_result_seek($this->handle, $row);
+        // Specifying the zero-th record here will reset the pointer
-        return pg_fetch_assoc($this->handle);
+        $result = pg_fetch_array($this->handle, $row, PGSQL_NUM);
+
+        return $this->parseResult($result);
     }
 
     public function numRecords()
@@ -47,6 +71,39 @@ class PostgreSQLQuery extends Query
 
     public function nextRecord()
     {
-        return pg_fetch_assoc($this->handle);
+        $row = pg_fetch_array($this->handle, null, PGSQL_NUM);
+
+        // Correct non-string types
+        if ($row) {
+            return $this->parseResult($row);
+        }
+
+        return false;
+    }
+
+    /**
+     * @param array $row
+     * @return array
+     */
+    protected function parseResult(array $row)
+    {
+        $record = [];
+
+        foreach ($row as $i => $v) {
+            $k = $this->columnNames[$i];
+            $record[$k] = $v;
+            $type = pg_field_type($this->handle, $i);
+            if (isset(self::$typeMapping[$type])) {
+                if ($type === 'bool' && $record[$k] === 't') {
+                    $record[$k] = 1;
+
+                    // Note that boolean 'f' will be converted to 0 by this
+                } else {
+                    settype($record[$k], self::$typeMapping[$type]);
+                }
+            }
+        }
+
+        return $record;
     }
 }

code/PostgreSQLSchemaManager.php

@@ -494,9 +494,15 @@ class PostgreSQLSchemaManager extends DBSchemaManager
         // First, we split the column specifications into parts
         // TODO: this returns an empty array for the following string: int(11) not null auto_increment
         //         on second thoughts, why is an auto_increment field being passed through?
-
+        $pattern = '/^([\w(\,)]+)\s?((?:not\s)?null)?\s?(default\s[\w\.\'\\\\]+)?\s?(check\s[\w()\'",\s\\\\]+)?$/i';
-        $pattern = '/^([\w(\,)]+)\s?((?:not\s)?null)?\s?(default\s[\w\.\']+)?\s?(check\s[\w()\'",\s]+)?$/i';
         preg_match($pattern, $colSpec, $matches);
+        // example value this regex is expected to parse:
+        // varchar(255) not null default 'SS\Test\Player' check ("ClassName" in ('SS\Test\Player', 'Player', null))
+        // split into:
+        // * varchar(255)
+        // * not null
+        // * default 'SS\Test\Player'
+        // * check ("ClassName" in ('SS\Test\Player', 'Player', null))
 
         if (sizeof($matches) == 0) {
             return '';
@@ -537,8 +543,8 @@ class PostgreSQLSchemaManager extends DBSchemaManager
                 if ($this->hasTable("{$tableName}_Live")) {
                     $updateConstraint .= "UPDATE \"{$tableName}_Live\" SET \"$colName\"='$default' WHERE \"$colName\" NOT IN ($constraint_values);";
                 }
-                if ($this->hasTable("{$tableName}_versions")) {
+                if ($this->hasTable("{$tableName}_Versions")) {
-                    $updateConstraint .= "UPDATE \"{$tableName}_versions\" SET \"$colName\"='$default' WHERE \"$colName\" NOT IN ($constraint_values);";
+                    $updateConstraint .= "UPDATE \"{$tableName}_Versions\" SET \"$colName\"='$default' WHERE \"$colName\" NOT IN ($constraint_values);";
                 }
 
                 $this->query($updateConstraint);
@@ -560,8 +566,17 @@ class PostgreSQLSchemaManager extends DBSchemaManager
 
     public function renameTable($oldTableName, $newTableName)
     {
+        $constraints = $this->getConstraintForTable($oldTableName);
         $this->query("ALTER TABLE \"$oldTableName\" RENAME TO \"$newTableName\"");
+
+        if ($constraints) {
+            foreach ($constraints as $old) {
+                $new = preg_replace('/^' . $oldTableName . '/', $newTableName, $old);
+                $this->query("ALTER TABLE \"$newTableName\" RENAME CONSTRAINT \"$old\" TO \"$new\";");
+            }
+        }
         unset(self::$cached_fieldlists[$oldTableName]);
+        unset(self::$cached_constraints[$oldTableName]);
     }
 
     public function checkAndRepairTable($tableName)
@@ -843,7 +858,9 @@ class PostgreSQLSchemaManager extends DBSchemaManager
             $argList = array();
             $nextArg = "";
             foreach ($bytes as $byte) {
-                if ($byte == "00") {
+                if ($byte == '\x') {
+                    continue;
+                } elseif ($byte == "00") {
                     $argList[] = $nextArg;
                     $nextArg = "";
                 } else {
@@ -961,6 +978,28 @@ class PostgreSQLSchemaManager extends DBSchemaManager
         return self::$cached_constraints[$constraint];
     }
 
+    /**
+     * Retrieve a list of constraints for the provided table name.
+     * @param string $tableName
+     * @return array
+     */
+    private function getConstraintForTable($tableName)
+    {
+        // Note the PostgreSQL `like` operator is case sensitive
+        $constraints = $this->preparedQuery(
+            "
+            SELECT conname
+            FROM pg_catalog.pg_constraint r
+            INNER JOIN pg_catalog.pg_namespace n
+              ON r.connamespace = n.oid
+            WHERE r.contype = 'c' AND conname like ? AND n.nspname = ?
+            ORDER BY 1;",
+            array($tableName . '_%', $this->database->currentSchema())
+        )->column('conname');
+
+        return $constraints;
+    }
+
     /**
      * A function to return the field names and datatypes for the particular table
      *

composer.json

@@ -15,11 +15,12 @@
         }
     ],
     "require": {
-        "silverstripe/framework": "^4",
+        "silverstripe/framework": "^4.10",
         "silverstripe/vendor-plugin": "^1.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^5.7"
+        "phpunit/phpunit": "^9.5",
+        "squizlabs/php_codesniffer": "^3"
     },
     "autoload": {
         "psr-4": {

docs/en/README.md

@@ -1,86 +1,5 @@
 # PostgreSQL Database Module
 
-SilverStripe now has tentative support for PostgreSQL ('Postgres').
-
-## Requirements
-
-SilverStripe 2.4.0 or greater. (PostgreSQL support is NOT available 
-in 2.3.).
-
-SilverStripe supports Postgres versions 8.3.x, 8.4.x and onwards. 
-Postgres 8.3.0 launched in February 2008, so SilverStripe has a fairly 
-modern but not bleeding edge Postgres version requirement.
-
-Support for 8.2.x is theoretically possible if you're willing to manually 
-install T-search. 8.2.x has not been tested either, so there may be other 
-compatibility issues. The EnterpriseDB versions of Postgres also work, if 
-you'd prefer a tuned version.
-
-## Installation
-
-You have three options to install PostgreSQL support with SilverStripe. 
-
-### Option 1 - Installer
-
-The first option is to use the installer. However, this is currently only 
-supported since SilverStripe 2.4.0 beta2 (or using the daily builds).
-
-1. Set up SilverStripe somewhere where you can start the installer - you 
-should only see one database “MySQL” to install with.
-2. Download a copy of the “postgresql” module from here: 
-http://silverstripe.org/postgresql-module
-3. Extract the archive you downloaded. Rename the directory from 
-“postgresql-trunk-rxxxx” to “postgresql” and copy it into the SilverStripe 
-directory you just set up
-4. Open the installer once again, and a new option “PostgreSQL” should appear. 
-You can now proceed through the installation without having to change any code.
-
-### Option 2 - Manual
-
-The second option is to setup PostgreSQL support manually. This can be achieved 
-by following these instructions:
-
-1. Set up a fresh working copy of SilverStripe
-2. Download a copy of the “postgresql” module from here: http://silverstripe.org/postgresql-module
-3. Extract the archive you downloaded. Rename the directory from 
-“postgresql-trunk-rxxxx” to “postgresql” and copy it into the SilverStripe 
-directory you just set up.
-4. Open up your mysite/_config.php file and add (or update) the $databaseConfig 
-array like so:
-
-> $databaseConfig = array(
->	'type' => 'PostgreSQLDatabase',
->	'server' => '[server address e.g. localhost]',
->	'username' => 'postgres',
->	'password' => 'mypassword',
->	'database' => 'SS_mysite'
-> );
-
-Finally, visit dev/build so that SilverStripe can build the database schema and 
-default records.
-
-### Option 3 - Environment file
-
-Finally, the third option is to change your environment to point to 
-PostgreSQLDatabase as a database class. Do this if you're currently using an
- _ss_environment.php file.
-
-1. Download a copy of the “postgresql” module from here: http://silverstripe.org/postgresql-module
-2. Extract the archive you downloaded. Rename the directory from 
-postgresql-trunk-rxxxx” to “postgresql” and copy it into your SS directory
-3. Add the following to your existing _ss_environment.php file:
-
-> define('SS_DATABASE_CLASS', 'PostgreSQLDatabase');
-
-Last steps:
-
-1. Ensure your SS_DATABASE_USERNAME and SS_DATABASE_PASSWORD defines in 
-_ss_environment.php are correct to the PostgreSQL server.
-2. Ensure that your mysite/_config.php file has a database name defined, such 
-as “SS_mysite”.
-3. Visit dev/build so that SilverStripe can build the database schema and 
-default records
-
 ## Features
 
 Here is a quick list of what's different in the Postgres module (a full 
@@ -301,21 +220,3 @@ connection, no matter what you entered in the "Database Name" field during
 installation.
 
 Make sure you have set the "search_path" correct for your database user. 
-
-## Known Issues
-
-All column and table names must be double-quoted.  PostgreSQL automatically 
-lower-cases columns, and your queries will fail if you don't.
-
-Ts_vector columns are not automatically detected by the built-in search filters.  
-That means if you're doing a search through the CMS on a ModelAdmin object, it 
-will use LIKE queries which are very slow.  
-
-If you're writing your own front-end search system, you can specify the columns 
-to use for search purposes, and you get the full benefits of T-Search.
-
-If you are using unsupported modules, there may be instances of MySQL-specific 
-SQL queries which will need to be made database-agnostic where possible.
-
-
-

phpcs.xml.dist

@@ -2,6 +2,9 @@
 <ruleset name="SilverStripe">
 	<description>CodeSniffer ruleset for SilverStripe coding conventions.</description>
 
+	<file>code</file>
+	<file>tests</file>
+
 	<!-- base rules are PSR-2 -->
 	<rule ref="PSR2" >
 		<!-- Current exclusions -->

phpunit.xml.dist

@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <phpunit bootstrap="vendor/silverstripe/framework/tests/bootstrap.php" colors="true">
 
 	<testsuite name="Default">

tests/PostgreSQLDatabaseTest.php

@@ -1,57 +0,0 @@
-<?php
-
-namespace SilverStripe\PostgreSQL\Tests;
-
-use Exception;
-use Page;
-use SilverStripe\Dev\SapphireTest;
-use SilverStripe\ORM\DataObject;
-use SilverStripe\ORM\DB;
-use SilverStripe\PostgreSQL\PostgreSQLDatabase;
-
-/**
- * @package postgresql
- * @subpackage tests
- */
-class PostgreSQLDatabaseTest extends SapphireTest
-{
-    protected $usesDatabase = true;
-
-    public function testReadOnlyTransaction()
-    {
-        if (DB::get_conn()->supportsTransactions() == true
-            && DB::get_conn() instanceof PostgreSQLDatabase
-        ) {
-            $page = new Page();
-            $page->Title = 'Read only success';
-            $page->write();
-
-            DB::get_conn()->transactionStart('READ ONLY');
-
-            try {
-                $page = new Page();
-                $page->Title = 'Read only page failed';
-                $page->write();
-            } catch (Exception $e) {
-                //could not write this record
-                //We need to do a rollback or a commit otherwise we'll get error messages
-                DB::get_conn()->transactionRollback();
-            }
-
-            DB::get_conn()->transactionEnd();
-
-            DataObject::flush_and_destroy_cache();
-
-            $success = DataObject::get('Page', "\"Title\"='Read only success'");
-            $fail = DataObject::get('Page', "\"Title\"='Read only page failed'");
-
-            //This page should be in the system
-            $this->assertTrue(is_object($success) && $success->exists());
-
-            //This page should NOT exist, we had 'read only' permissions
-            $this->assertFalse(is_object($fail) && $fail->exists());
-        } else {
-            $this->markTestSkipped('Current database is not PostgreSQL');
-        }
-    }
-}

tests/PostgreSQLSchemaManagerTest.php

@@ -0,0 +1,138 @@
+<?php
+
+namespace SilverStripe\PostgreSQL\Tests;
+
+use SilverStripe\Core\ClassInfo;
+use SilverStripe\Dev\SapphireTest;
+use SilverStripe\ORM\Connect\Database;
+use SilverStripe\ORM\Connect\DatabaseException;
+use SilverStripe\ORM\DB;
+use SilverStripe\PostgreSQL\PostgreSQLConnector;
+use SilverStripe\PostgreSQL\PostgreSQLSchemaManager;
+
+class PostgreSQLSchemaManagerTest extends SapphireTest
+{
+
+    protected $usesTransactions = false;
+
+    public function testAlterTable()
+    {
+        try {
+            /** @var PostgreSQLSchemaManager $dbSchema */
+            $dbSchema = DB::get_schema();
+            $dbSchema->quiet();
+
+            $this->createSS3Table();
+
+            try {
+                DB::query('INSERT INTO "ClassNamesUpgrade" ("ClassName") VALUES (\'App\MySite\FooBar\')');
+                $this->assertFalse(true, 'SS3 Constaint should have blocked the previous insert.');
+            } catch (DatabaseException $ex) {
+            }
+
+            $dbSchema->schemaUpdate(function () use ($dbSchema) {
+                $dbSchema->requireTable(
+                    'ClassNamesUpgrade',
+                    [
+                        'ID' => 'PrimaryKey',
+                        'ClassName' => 'Enum(array("App\\\\MySite\\\\FooBar"))',
+                    ]
+                );
+            });
+
+            DB::query('INSERT INTO "ClassNamesUpgrade" ("ClassName") VALUES (\'App\MySite\FooBar\')');
+            $count = DB::query('SELECT count(*) FROM "ClassNamesUpgrade" WHERE "ClassName" = \'App\MySite\FooBar\'')
+                ->value();
+
+            $this->assertEquals(1, $count);
+        } finally {
+            DB::query('DROP TABLE IF EXISTS "ClassNamesUpgrade"');
+            DB::query('DROP SEQUENCE IF EXISTS "ClassNamesUpgrade_ID_seq"');
+        }
+    }
+
+    private function createSS3Table()
+    {
+        DB::query(<<<SQL
+CREATE SEQUENCE "ClassNamesUpgrade_ID_seq" start 1 increment 1;       
+CREATE TABLE "ClassNamesUpgrade"
+(
+  "ID" bigint NOT NULL DEFAULT nextval('"ClassNamesUpgrade_ID_seq"'::regclass),
+  "ClassName" character varying(255) DEFAULT 'ClassNamesUpgrade'::character varying,
+  CONSTRAINT "ClassNamesUpgrade_pkey" PRIMARY KEY ("ID"),
+  CONSTRAINT "ClassNamesUpgrade_ClassName_check" CHECK ("ClassName"::text = ANY (ARRAY['FooBar'::character varying::text]))
+)
+WITH (
+  OIDS=FALSE
+);
+SQL
+        );
+    }
+
+    public function testRenameTable()
+    {
+        try {
+            /** @var PostgreSQLSchemaManager $dbSchema */
+            $dbSchema = DB::get_schema();
+            $dbSchema->quiet();
+
+            $this->createSS3VersionedTable();
+
+            $this->assertConstraintCount(1, 'ClassNamesUpgrade_versioned_ClassName_check');
+
+            $dbSchema->schemaUpdate(function () use ($dbSchema) {
+                $dbSchema->renameTable(
+                    'ClassNamesUpgrade_versioned',
+                    'ClassNamesUpgrade_Versioned'
+                );
+            });
+
+            $this->assertTableCount(0, 'ClassNamesUpgrade_versioned');
+            $this->assertTableCount(1, 'ClassNamesUpgrade_Versioned');
+            $this->assertConstraintCount(0, 'ClassNamesUpgrade_versioned_ClassName_check');
+            $this->assertConstraintCount(1, 'ClassNamesUpgrade_Versioned_ClassName_check');
+        } finally {
+            DB::query('DROP TABLE IF EXISTS "ClassNamesUpgrade_Versioned"');
+            DB::query('DROP TABLE IF EXISTS "ClassNamesUpgrade_versioned"');
+            DB::query('DROP SEQUENCE IF EXISTS "ClassNamesUpgrade_versioned_ID_seq"');
+        }
+    }
+
+    private function assertConstraintCount($expected, $constraintName)
+    {
+        $count = DB::prepared_query(
+            'SELECT count(*) FROM pg_catalog.pg_constraint WHERE conname like ?',
+            [$constraintName]
+        )->value();
+
+        $this->assertEquals($expected, $count);
+    }
+
+    private function assertTableCount($expected, $tableName)
+    {
+        $count = DB::prepared_query(
+            'SELECT count(*) FROM pg_catalog.pg_tables WHERE "tablename" like ?',
+            [$tableName]
+        )->value();
+
+        $this->assertEquals($expected, $count);
+    }
+
+    private function createSS3VersionedTable()
+    {
+        DB::query(<<<SQL
+CREATE SEQUENCE "ClassNamesUpgrade_versioned_ID_seq" start 1 increment 1;       
+CREATE TABLE "ClassNamesUpgrade_versioned"
+(
+  "ID" bigint NOT NULL DEFAULT nextval('"ClassNamesUpgrade_versioned_ID_seq"'::regclass),
+  "ClassName" character varying(255) DEFAULT 'ClassNamesUpgrade'::character varying,
+  CONSTRAINT "ClassNamesUpgrade_pkey" PRIMARY KEY ("ID"),
+  CONSTRAINT "ClassNamesUpgrade_versioned_ClassName_check" CHECK ("ClassName"::text = ANY (ARRAY['FooBar'::character varying::text]))
+)
+WITH (
+  OIDS=FALSE
+);
+SQL
+        );
+    }
+}