class Sequel::JDBC::Dataset

Constants

PreparedStatementMethods
StoredProcedureMethods

Public Instance Methods

fetch_rows(sql, &block) click to toggle source
    # File lib/sequel/adapters/jdbc.rb
756 def fetch_rows(sql, &block)
757   execute(sql){|result| process_result_set(result, &block)}
758   self
759 end
with_convert_types(v) click to toggle source

Set whether to convert Java types to ruby types in the returned dataset.

    # File lib/sequel/adapters/jdbc.rb
767 def with_convert_types(v)
768   clone(:convert_types=>v)
769 end
with_fetch_size(size) click to toggle source

Set the fetch size on JDBC ResultSets created from the returned dataset.

    # File lib/sequel/adapters/jdbc.rb
762 def with_fetch_size(size)
763   clone(:fetch_size=>size)
764 end

Private Instance Methods

basic_type_convertor(map, meta, type, i) click to toggle source

The basic type conversion proc to use for the given column number i, given the type conversion map and the ResultSetMetaData.

This is implemented as a separate method so that subclasses can override the methods separately.

    # File lib/sequel/adapters/jdbc.rb
795 def basic_type_convertor(map, meta, type, i)
796   map[type]
797 end
convert_types?() click to toggle source

Whether we should convert Java types to ruby types for this dataset.

    # File lib/sequel/adapters/jdbc.rb
774 def convert_types?
775   ct = @opts[:convert_types]
776   ct.nil? ? db.convert_types : ct
777 end
prepare_extend_sproc(ds) click to toggle source

Extend the dataset with the JDBC stored procedure methods.

    # File lib/sequel/adapters/jdbc.rb
780 def prepare_extend_sproc(ds)
781   ds.with_extend(StoredProcedureMethods)
782 end
prepared_statement_modules() click to toggle source
    # File lib/sequel/adapters/jdbc.rb
799 def prepared_statement_modules
800   [PreparedStatementMethods]
801 end
process_result_set(result) { |row| ... } click to toggle source

Split out from fetch rows to allow processing of JDBC result sets that don’t come from issuing an SQL string.

    # File lib/sequel/adapters/jdbc.rb
805 def process_result_set(result)
806   meta = result.getMetaData
807   if fetch_size = opts[:fetch_size]
808     result.setFetchSize(fetch_size)
809   end
810   cols = []
811   i = 0
812   convert = convert_types?
813   map = convert ? db.type_convertor_map : db.basic_type_convertor_map
814 
815   meta.getColumnCount.times do
816     i += 1
817     cols << [output_identifier(meta.getColumnLabel(i)), i, convert ? type_convertor(map, meta, meta.getColumnType(i), i) : basic_type_convertor(map, meta, meta.getColumnType(i), i)]
818   end
819   max = i
820   self.columns = cols.map{|c| c[0]}
821 
822   while result.next
823     row = {}
824     i = -1
825     while (i += 1) < max
826       n, j, pr = cols[i]
827       row[n] = pr.call(result, j)
828     end
829     yield row
830   end
831 ensure
832   result.close
833 end
type_convertor(map, meta, type, i) click to toggle source

The type conversion proc to use for the given column number i, given the type conversion map and the ResultSetMetaData.

    # File lib/sequel/adapters/jdbc.rb
786 def type_convertor(map, meta, type, i)
787   map[type]
788 end