Class: Sequel::DB2::Dataset

Inherits:

Sequel::Dataset

• Object
• Sequel::Dataset
• Sequel::DB2::Dataset

Includes:

DatasetMethods

Defined in:

lib/sequel/adapters/db2.rb

Constant Summary

MAX_COL_SIZE =

256

Constants included from DatasetMethods

Sequel::DB2::DatasetMethods::BITWISE_METHOD_MAP, Sequel::DB2::DatasetMethods::BOOL_FALSE, Sequel::DB2::DatasetMethods::BOOL_TRUE

Constants inherited from Sequel::Dataset

Sequel::Dataset::ACTION_METHODS, Sequel::Dataset::AND_SEPARATOR, Sequel::Dataset::ARG_BLOCK_ERROR_MSG, Sequel::Dataset::ARRAY_ACCESS_ERROR_MSG, Sequel::Dataset::BOOL_FALSE, Sequel::Dataset::BOOL_TRUE, Sequel::Dataset::COLUMN_CHANGE_OPTS, Sequel::Dataset::COLUMN_REF_RE1, Sequel::Dataset::COLUMN_REF_RE2, Sequel::Dataset::COLUMN_REF_RE3, Sequel::Dataset::COMMA_SEPARATOR, Sequel::Dataset::CONDITIONED_JOIN_TYPES, Sequel::Dataset::COUNT_FROM_SELF_OPTS, Sequel::Dataset::COUNT_OF_ALL_AS_COUNT, Sequel::Dataset::DATASET_ALIAS_BASE_NAME, Sequel::Dataset::DELETE_CLAUSE_METHODS, Sequel::Dataset::FOR_UPDATE, Sequel::Dataset::IMPORT_ERROR_MSG, Sequel::Dataset::INSERT_CLAUSE_METHODS, Sequel::Dataset::IS_LITERALS, Sequel::Dataset::IS_OPERATORS, Sequel::Dataset::JOIN_METHODS, Sequel::Dataset::MUTATION_METHODS, Sequel::Dataset::NON_SQL_OPTIONS, Sequel::Dataset::NOTIMPL_MSG, Sequel::Dataset::NULL, Sequel::Dataset::N_ARITY_OPERATORS, Sequel::Dataset::PREPARED_ARG_PLACEHOLDER, Sequel::Dataset::QUALIFY_KEYS, Sequel::Dataset::QUERY_METHODS, Sequel::Dataset::QUESTION_MARK, Sequel::Dataset::SELECT_CLAUSE_METHODS, Sequel::Dataset::SQL_WITH, Sequel::Dataset::STANDARD_TIMESTAMP_FORMAT, Sequel::Dataset::TIMESTAMP_FORMAT, Sequel::Dataset::TWO_ARITY_OPERATORS, Sequel::Dataset::UNCONDITIONED_JOIN_TYPES, Sequel::Dataset::UPDATE_CLAUSE_METHODS, Sequel::Dataset::WILDCARD

Instance Attribute Summary

• #convert_smallint_to_bool ⇒ Object

  Whether to convert smallint to boolean arguments for this dataset.

Attributes inherited from Sequel::Dataset

#db, #identifier_input_method, #identifier_output_method, #opts, #quote_identifiers, #row_proc

Instance Method Summary

• #fetch_rows(sql) ⇒ Object

Methods included from DatasetMethods

#cast_sql, #complex_expression_sql, #supports_is_true?, #supports_multiple_column_in?, #supports_select_all_and_column?, #supports_timestamp_usecs?, #supports_where_true?, #supports_window_functions?

Methods included from EmulateOffsetWithRowNumber

#complex_expression_sql, #select_sql

Methods inherited from Sequel::Dataset

#<<, #==, #[], #[]=, #add_graph_aliases, #aliased_expression_sql, #all, #and, #array_sql, #avg, #bind, #boolean_constant_sql, #call, #case_expression_sql, #cast_sql, clause_methods, #clone, #column_all_sql, #columns, #columns!, #complex_expression_sql, #constant_sql, #count, def_mutation_method, #def_mutation_method, #delete, #delete_sql, #distinct, #each, #each_page, #each_server, #empty?, #eql?, #except, #exclude, #exclude_having, #exclude_where, #exists, #filter, #first, #first_source, #first_source_alias, #first_source_table, #for_update, #from, #from_self, #function_sql, #get, #graph, #grep, #group, #group_and_count, #group_by, #hash, #having, #import, #initialize, #insert, #insert_multiple, #insert_sql, #inspect, #intersect, #interval, introspect_all_columns, #invert, #join, #join_clause_sql, #join_on_clause_sql, #join_table, #join_using_clause_sql, #last, #limit, #literal, #lock_style, #map, #max, #min, #multi_insert, #multi_insert_sql, #naked, #negative_boolean_constant_sql, #or, #order, #order_append, #order_by, #order_more, #order_prepend, #ordered_expression_sql, #paginate, #placeholder_literal_string_sql, #prepare, #print, #provides_accurate_rows_matched?, #qualified_identifier_sql, #qualify, #qualify_to, #qualify_to_first_source, #query, #quote_identifier, #quote_identifiers?, #quote_schema_table, #quoted_identifier, #range, #recursive_cte_requires_column_aliases?, #requires_placeholder_type_specifiers?, #requires_sql_standard_datetimes?, #returning, #reverse, #reverse_order, #row_number_column, #schema_and_table, #select, #select_all, #select_append, #select_group, #select_hash, #select_map, #select_more, #select_order_map, #select_sql, #server, #set, #set_defaults, #set_graph_aliases, #set_overrides, #single_record, #single_value, #split_alias, #sql, #subscript_sql, #sum, #supports_cte?, #supports_cte_in_subqueries?, #supports_distinct_on?, #supports_insert_select?, #supports_intersect_except?, #supports_intersect_except_all?, #supports_is_true?, #supports_join_using?, #supports_modifying_joins?, #supports_multiple_column_in?, #supports_ordered_distinct_on?, #supports_returning?, #supports_select_all_and_column?, #supports_timestamp_timezones?, #supports_timestamp_usecs?, #supports_where_true?, #supports_window_functions?, #to_csv, #to_dot, #to_hash, #truncate, #truncate_sql, #unbind, #unfiltered, #ungraphed, #ungrouped, #union, #unlimited, #unordered, #unused_table_alias, #update, #update_sql, #where, #window_function_sql, #window_sql, #with, #with_recursive, #with_sql

Methods included from Metaprogramming

#meta_def

Methods included from SQL::StringMethods

#ilike, #like

Methods included from SQL::OrderMethods

#asc, #desc

Methods included from SQL::NumericMethods

#+

Methods included from SQL::ComplexExpressionMethods

#extract, #sql_boolean, #sql_number, #sql_string

Methods included from SQL::CastMethods

#cast, #cast_numeric, #cast_string

Methods included from SQL::BooleanMethods

#~

Methods included from SQL::AliasMethods

#as

Constructor Details

This class inherits a constructor from Sequel::Dataset

Instance Attribute Details

#convert_smallint_to_bool ⇒ Object

Whether to convert smallint to boolean arguments for this dataset. Defaults to the DB2 module setting.

# File 'lib/sequel/adapters/db2.rb', line 171

def convert_smallint_to_bool
  defined?(@convert_smallint_to_bool) ? @convert_smallint_to_bool : (@convert_smallint_to_bool = DB2.convert_smallint_to_bool)
end

Instance Method Details

#fetch_rows(sql) ⇒ Object

# File 'lib/sequel/adapters/db2.rb', line 178

def fetch_rows(sql)
  execute(sql) do |sth|
    offset = @opts[:offset]
    db = @db
    i = 1
    column_info = get_column_info(sth)
    cols = column_info.map{|c| c.at(1)}
    cols.delete(row_number_column) if offset
    @columns = cols
    errors = [DB2CLI::SQL_NO_DATA_FOUND, DB2CLI::SQL_ERROR]
    until errors.include?(rc = DB2CLI.SQLFetch(sth))
      db.check_error(rc, "Could not fetch row")
      row = {}
      column_info.each do |i, c, t, s, pr|
        v, _ = db.checked_error("Could not get data"){DB2CLI.SQLGetData(sth, i, t, s)}
        row[c] = if v == DB2CLI::Null
          nil
        elsif pr
          pr.call(v)
        else
          v
        end
      end
      row.delete(row_number_column) if offset
      yield row
    end
  end
  self
end