Module: ClickHouse::Extend::ConnectionTable
- Included in:
- Connection
- Defined in:
- lib/click_house/extend/connection_table.rb
Instance Method Summary collapse
-
#create_table(name, if_not_exists: false, cluster: nil, partition: nil, order: nil, primary_key: nil, sample: nil, ttl: nil, settings: nil, engine:, &block) ⇒ Object
rubocop:disable Metrics/ParameterLists.
- #describe_table(name) ⇒ ResultSet
- #drop_table(name, temporary: false, if_exists: false, cluster: nil) ⇒ Object
- #rename_table(from, to, cluster: nil) ⇒ Object
- #table_exists?(name, temporary: false) ⇒ Boolean
- #tables ⇒ Array<String>
-
#truncate_table(name, if_exists: false, cluster: nil) ⇒ Object
rubocop:enable Metrics/ParameterLists.
- #truncate_tables(names = tables, *argv) ⇒ Object
Instance Method Details
#create_table(name, if_not_exists: false, cluster: nil, partition: nil, order: nil, primary_key: nil, sample: nil, ttl: nil, settings: nil, engine:, &block) ⇒ Object
rubocop:disable Metrics/ParameterLists
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# File 'lib/click_house/extend/connection_table.rb', line 42 def create_table( name, if_not_exists: false, cluster: nil, partition: nil, order: nil, primary_key: nil, sample: nil, ttl: nil, settings: nil, engine:, &block ) sql = <<~SQL CREATE TABLE %<exists>s %<name>s %<cluster>s %<definition>s %<engine>s %<partition>s %<order>s %<primary_key>s %<sample>s %<ttl>s %<settings>s SQL definition = ClickHouse::Definition::ColumnSet.new(&block) pattern = { name: name, exists: Util::Statement.ensure(if_not_exists, 'IF NOT EXISTS'), definition: definition.to_s, cluster: Util::Statement.ensure(cluster, "ON CLUSTER #{cluster}"), partition: Util::Statement.ensure(partition, "PARTITION BY #{partition}"), order: Util::Statement.ensure(order, "ORDER BY #{order}"), primary_key: Util::Statement.ensure(primary_key, "PRIMARY KEY #{primary_key}"), sample: Util::Statement.ensure(sample, "SAMPLE BY #{sample}"), ttl: Util::Statement.ensure(ttl, "TTL #{ttl}"), settings: Util::Statement.ensure(settings, "SETTINGS #{settings}"), engine: Util::Statement.ensure(engine, "ENGINE = #{engine}") } execute(format(sql, pattern)).success? end |
#describe_table(name) ⇒ ResultSet
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# File 'lib/click_house/extend/connection_table.rb', line 12 def describe_table(name) Response::Factory[execute("DESCRIBE TABLE #{name} FORMAT JSON")] end |
#drop_table(name, temporary: false, if_exists: false, cluster: nil) ⇒ Object
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# File 'lib/click_house/extend/connection_table.rb', line 28 def drop_table(name, temporary: false, if_exists: false, cluster: nil) sql = 'DROP %<temporary>s TABLE %<exists>s %<name>s %<cluster>s' pattern = { name: name, temporary: Util::Statement.ensure(temporary, 'TEMPORARY'), exists: Util::Statement.ensure(if_exists, 'IF EXISTS'), cluster: Util::Statement.ensure(cluster, "ON CLUSTER #{cluster}"), } execute(format(sql, pattern)).success? end |
#rename_table(from, to, cluster: nil) ⇒ Object
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# File 'lib/click_house/extend/connection_table.rb', line 94 def rename_table(from, to, cluster: nil) from = Array(from) to = Array(to) unless from.length == to.length raise StatementException, '<from> tables length should equal <to> length' end sql = <<~SQL RENAME TABLE %<names>s %<cluster>s SQL pattern = { names: from.zip(to).map { |a| a.join(' TO ') }.join(', '), cluster: Util::Statement.ensure(cluster, "ON CLUSTER #{cluster}") } execute(format(sql, pattern)).success? end |
#table_exists?(name, temporary: false) ⇒ Boolean
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# File 'lib/click_house/extend/connection_table.rb', line 17 def table_exists?(name, temporary: false) sql = 'EXISTS %<temporary>s TABLE %<name>s FORMAT CSV' pattern = { name: name, temporary: Util::Statement.ensure(temporary, 'TEMPORARY') } Type::BooleanType.new.cast(execute(format(sql, pattern)).body.dig(0, 0)) end |
#tables ⇒ Array<String>
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# File 'lib/click_house/extend/connection_table.rb', line 7 def tables Array(execute('SHOW TABLES FORMAT CSV').body).tap(&:flatten!) end |
#truncate_table(name, if_exists: false, cluster: nil) ⇒ Object
rubocop:enable Metrics/ParameterLists
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# File 'lib/click_house/extend/connection_table.rb', line 78 def truncate_table(name, if_exists: false, cluster: nil) sql = 'TRUNCATE TABLE %<exists>s %<name>s %<cluster>s' pattern = { name: name, exists: Util::Statement.ensure(if_exists, 'IF EXISTS'), cluster: Util::Statement.ensure(cluster, "ON CLUSTER #{cluster}") } execute(format(sql, pattern)).success? end |
#truncate_tables(names = tables, *argv) ⇒ Object
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# File 'lib/click_house/extend/connection_table.rb', line 90 def truncate_tables(names = tables, *argv) Array(names).each { |name| truncate_table(name, *argv) } end |