Error code for "Unknown database" error. File core/lib/Drupal/Core/Database/Driver/pgsql/Connection.php

public &SelectInterface::getExpressions()

public QueryConditionTrait::notExists(SelectInterface

public StatementPrefetch::current()

The placeholder counter. File core/lib/Drupal/Core/Database/Schema.php, line 23

public SelectExtender::addTag($tag)

public Connection::escapeField($field)

Specifies installation tasks for SQLite databases. Hierarchy class \Drupal\Core\Database\Install\

public Connection::escapeAlias($field)

public Schema::dropTable($table) Drop