Classes/Console/Service/Database/SchemaService.php
public function updateSchema(array $schemaUpdateTypes, $dryRun = false)
    {
        $updateStatements = [
            SchemaUpdateType::GROUP_SAFE => $this->schemaUpdate->getSafeUpdates(),
            SchemaUpdateType::GROUP_DESTRUCTIVE => $this->schemaUpdate->getDestructiveUpdates(),
        ];

        $updateResult = new SchemaUpdateResult();

        foreach ($schemaUpdateTypes as $schemaUpdateType) {
            foreach ($schemaUpdateType->getStatementTypes() as $statementType => $statementGroup) {
                if (isset($updateStatements[$statementGroup][$statementType])) {
                    $statements = $updateStatements[$statementGroup][$statementType];
                    if (empty($statements)) {
                        continue;
                    }
                    if ($dryRun) {
                        $updateResult->addPerformedUpdates($schemaUpdateType, $statements);
                    } else {
                        $result = $this->schemaUpdate->migrate(
                            $statements,
                            // Generate a map of statements as keys and true as values
                            array_combine(array_keys($statements), array_fill(0, count($statements), true))
                        );
                        if (empty($result)) {
                            $updateResult->addPerformedUpdates($schemaUpdateType, $statements);
                        } else {
                            $updateResult->addErrors($schemaUpdateType, $result, $statements);
                        }
                    }
                }
            }
        }

        $this->emitDatabaseUpdateSignal($updateResult);

        return $updateResult;
    }
public function updateSchema(array $schemaUpdateTypes, $dryRun = false)
    {
        $updateStatements = [
            SchemaUpdateType::GROUP_SAFE => $this->schemaUpdate->getSafeUpdates(),
            SchemaUpdateType::GROUP_DESTRUCTIVE => $this->schemaUpdate->getDestructiveUpdates(),
        ];

        $updateResult = new SchemaUpdateResult();

        foreach ($schemaUpdateTypes as $schemaUpdateType) {
            foreach ($schemaUpdateType->getStatementTypes() as $statementType => $statementGroup) {
                if (isset($updateStatements[$statementGroup][$statementType])) {
                    $statements = $updateStatements[$statementGroup][$statementType];
                    if (empty($statements)) {
                        continue;
                    }
                    if ($dryRun) {
                        $updateResult->addPerformedUpdates($schemaUpdateType, $statements);
                    } else {
                        $result = $this->schemaUpdate->migrate(
                            $statements,
                            // Generate a map of statements as keys and true as values
                            array_combine(array_keys($statements), array_fill(0, count($statements), true))
                        );
                        if (empty($result)) {
                            $updateResult->addPerformedUpdates($schemaUpdateType, $statements);
                        } else {
                            $updateResult->addErrors($schemaUpdateType, $result, $statements);
                        }
                    }
                }
            }
        }

        $this->emitDatabaseUpdateSignal($updateResult);

        return $updateResult;
    }
Perform necessary database schema migrations

@param SchemaUpdateType[] $schemaUpdateTypes List of permitted schema update types
@param bool $dryRun If true, the database operations are not performed
@return SchemaUpdateResult Result of the schema update