class Sequel::JDBC::Dataset
Constants
- PreparedStatementMethods
- StoredProcedureMethods
Public Instance Methods
fetch_rows(sql, &block)
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# File lib/sequel/adapters/jdbc.rb, line 725 def fetch_rows(sql, &block) execute(sql){|result| process_result_set(result, &block)} self end
with_convert_types(v)
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Set whether to convert Java types to ruby types in the returned dataset.
# File lib/sequel/adapters/jdbc.rb, line 736 def with_convert_types(v) clone(:convert_types=>v) end
with_fetch_size(size)
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Set the fetch size on JDBC ResultSets created from the returned dataset.
# File lib/sequel/adapters/jdbc.rb, line 731 def with_fetch_size(size) clone(:fetch_size=>size) end
Private Instance Methods
basic_type_convertor(map, meta, type, i)
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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, line 764 def basic_type_convertor(map, meta, type, i) map[type] end
convert_types?()
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Whether we should convert Java types to ruby types for this dataset.
# File lib/sequel/adapters/jdbc.rb, line 743 def convert_types? ct = @opts[:convert_types] ct.nil? ? db.convert_types : ct end
prepare_extend_sproc(ds)
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Extend the dataset with the JDBC stored procedure methods.
# File lib/sequel/adapters/jdbc.rb, line 749 def prepare_extend_sproc(ds) ds.with_extend(StoredProcedureMethods) end
prepared_statement_modules()
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# File lib/sequel/adapters/jdbc.rb, line 768 def prepared_statement_modules [PreparedStatementMethods] end
process_result_set(result) { |row| ... }
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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, line 774 def process_result_set(result) meta = result.getMetaData if fetch_size = opts[:fetch_size] result.setFetchSize(fetch_size) end cols = [] i = 0 convert = convert_types? map = convert ? db.type_convertor_map : db.basic_type_convertor_map meta.getColumnCount.times do i += 1 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)] end self.columns = cols.map{|c| c[0]} while result.next row = {} cols.each do |n, j, pr| row[n] = pr.call(result, j) end yield row end ensure result.close end
type_convertor(map, meta, type, i)
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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, line 755 def type_convertor(map, meta, type, i) map[type] end