Class: Outhad::Integrations::Source::Clickhouse::Client

Inherits:
SourceConnector
  • Object
show all
Defined in:
lib/outhad/integrations/source/clickhouse/client.rb

Instance Method Summary collapse

Instance Method Details

#check_connection(connection_config) ⇒ Object 



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# File 'lib/outhad/integrations/source/clickhouse/client.rb', line 7

def check_connection(connection_config)
  connection_config = connection_config.with_indifferent_access
  create_connection(connection_config)
  ConnectionStatus.new(
    status: ConnectionStatusType["succeeded"]
  ).to_outhad_message
rescue StandardError => e
  ConnectionStatus.new(
    status: ConnectionStatusType["failed"], message: e.message
  ).to_outhad_message
end

#discover(connection_config) ⇒ Object 



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# File 'lib/outhad/integrations/source/clickhouse/client.rb', line 19

def discover(connection_config)
  connection_config = connection_config.with_indifferent_access
  query = "SELECT table_name, column_name, data_type, is_nullable FROM information_schema.columns WHERE table_schema = '#{connection_config[:database]}' ORDER BY table_name, ordinal_position;"
  db = create_connection(connection_config)
  records = query_execution(db, query)
  catalog = Catalog.new(streams: create_streams(records))
  catalog.to_outhad_message
rescue StandardError => e
  handle_exception(e, {
                     context: "CLICKHOUSE:DISCOVER:EXCEPTION",
                     type: "error"
                   })
end

#read(sync_config) ⇒ Object 



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# File 'lib/outhad/integrations/source/clickhouse/client.rb', line 33

def read(sync_config)
  connection_config = sync_config.source.connection_specification
  connection_config = connection_config.with_indifferent_access
  query = sync_config.model.query
  query = batched_query(query, sync_config.limit, sync_config.offset) unless sync_config.limit.nil? && sync_config.offset.nil?
  db = create_connection(connection_config)
  query(db, query)
rescue StandardError => e
  handle_exception(e, {
                     context: "CLICKHOUSE:READ:EXCEPTION",
                     type: "error",
                     sync_id: sync_config.sync_id,
                     sync_run_id: sync_config.sync_run_id
                   })
end