Support change database and raw queries - #72
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Changes
Updated
clickhouseto0.15.2The new release adds
Client::query_raw()and support for thedatabaseURL parameter, which this PR builds on.Send SQL verbatim (closes #53)
The SQL set on a statement is now sent to the server exactly as written. Parameters were always bound server-side with
{name: Type}, and that still works the same way.Configurable default database (closes #67)
There are two ways to set the default database:
?database=<name>to the URI to set it for all connections created from aDatabase."adbc.connection.db_schema"(OptionConnection::CurrentSchema) to set or override it per connection, at creation or later. The same option reads it back. In ADBC terms a ClickHouse database maps to a schema, since ClickHouse has no catalogs.The database name travels with every HTTP request, so it is not affected by session expiry or load balancing, unlike a
USE <name>statement.Empty database names are rejected with a clear error instead of being silently ignored.