Class: Sequel::JDBC::Derby::Dataset

Inherits:
Sequel::JDBC::Dataset show all
Includes:
Dataset::ColumnsLimit1
Defined in:
lib/sequel/adapters/jdbc/derby.rb

Constant Summary

Constants included from Dataset::ColumnsLimit1

Dataset::ColumnsLimit1::COLUMNS_CLONE_OPTIONS

Constants inherited from Sequel::JDBC::Dataset

Sequel::JDBC::Dataset::PreparedStatementMethods, Sequel::JDBC::Dataset::StoredProcedureMethods

Constants inherited from Dataset

Dataset::ACTION_METHODS, Dataset::BITWISE_METHOD_MAP, Dataset::COLUMNS_CLONE_OPTIONS, Dataset::COLUMN_CHANGE_OPTS, Dataset::CONDITIONED_JOIN_TYPES, Dataset::COUNT_FROM_SELF_OPTS, Dataset::COUNT_OF_ALL_AS_COUNT, Dataset::COUNT_SELECT, Dataset::DEFAULT, Dataset::DEFAULT_PREPARED_STATEMENT_MODULE_METHODS, Dataset::EMPTY_ARRAY, Dataset::EMPTY_SELECT, Dataset::EXISTS, Dataset::EXTENSIONS, Dataset::IS_LITERALS, Dataset::IS_OPERATORS, Dataset::JOIN_METHODS, Dataset::LIKE_OPERATORS, Dataset::NON_SQL_OPTIONS, Dataset::N_ARITY_OPERATORS, Dataset::OPTS, Dataset::PREPARED_ARG_PLACEHOLDER, Dataset::PREPARED_STATEMENT_MODULE_CODE, Dataset::QUALIFY_KEYS, Dataset::QUERY_METHODS, Dataset::REGEXP_OPERATORS, Dataset::TRUE_FREEZE, Dataset::TWO_ARITY_OPERATORS, Dataset::UNCONDITIONED_JOIN_TYPES, Dataset::WILDCARD

Instance Attribute Summary

Attributes inherited from Dataset

#db, #opts

Instance Method Summary collapse

Methods included from Dataset::ColumnsLimit1

#columns!

Methods inherited from Sequel::JDBC::Dataset

#fetch_rows, #with_convert_types, #with_fetch_size

Methods inherited from Dataset

#<<, #==, #[], #add_graph_aliases, #aliased_expression_sql_append, #all, #array_sql_append, #as_hash, #avg, #bind, #boolean_constant_sql_append, #call, clause_methods, #clone, #column_all_sql_append, #columns, #columns!, #constant_sql_append, #count, #current_datetime, def_sql_method, #delayed_evaluation_sql_append, #delete, #distinct, #dup, #each, #each_server, #empty?, #eql?, #escape_like, #except, #exclude, #exclude_having, #exists, #extension, #filter, #first, #first!, #first_source, #first_source_alias, #first_source_table, #for_update, #freeze, #from, #from_self, #frozen?, #function_sql_append, #get, #graph, #grep, #group, #group_and_count, #group_append, #group_by, #group_cube, #group_rollup, #grouping_sets, #hash, #having, #import, #initialize, #insert, #insert_sql, #inspect, #intersect, #invert, #join, #join_clause_sql_append, #join_on_clause_sql_append, #join_table, #join_using_clause_sql_append, #joined_dataset?, #last, #lateral, #limit, #literal_append, #literal_date_or_time, #lock_style, #map, #max, #merge, #merge_delete, #merge_insert, #merge_sql, #merge_update, #merge_using, #min, #multi_insert, #multi_insert_sql, #naked, #negative_boolean_constant_sql_append, #nowait, #offset, #or, #order, #order_append, #order_by, #order_more, #order_prepend, #ordered_expression_sql_append, #paged_each, #placeholder_literal_string_sql_append, #placeholder_literalizer_class, #placeholder_literalizer_loader, #prepare, #provides_accurate_rows_matched?, #qualified_identifier_sql_append, #qualify, #quote_identifier_append, #quote_identifiers?, #quote_schema_table_append, #quoted_identifier_append, #recursive_cte_requires_column_aliases?, register_extension, #requires_placeholder_type_specifiers?, #requires_sql_standard_datetimes?, #returning, #reverse, #reverse_order, #row_number_column, #row_proc, #schema_and_table, #select, #select_all, #select_append, #select_group, #select_hash, #select_hash_groups, #select_map, #select_more, #select_order_map, #select_prepend, #server, #server?, #set_graph_aliases, #single_record, #single_record!, #single_value, #single_value!, #skip_limit_check, #skip_locked, #split_alias, #split_qualifiers, #sql, #subscript_sql_append, #sum, #supports_cte?, #supports_cte_in_subqueries?, #supports_deleting_joins?, #supports_derived_column_lists?, #supports_distinct_on?, #supports_group_cube?, #supports_grouping_sets?, #supports_insert_select?, #supports_intersect_except?, #supports_intersect_except_all?, #supports_join_using?, #supports_lateral_subqueries?, #supports_limits_in_correlated_subqueries?, #supports_modifying_joins?, #supports_nowait?, #supports_offsets_in_correlated_subqueries?, #supports_ordered_distinct_on?, #supports_placeholder_literalizer?, #supports_regexp?, #supports_replace?, #supports_returning?, #supports_select_all_and_column?, #supports_skip_locked?, #supports_timestamp_timezones?, #supports_timestamp_usecs?, #supports_updating_joins?, #supports_where_true?, #supports_window_clause?, #supports_window_function_frame_option?, #supports_window_functions?, #to_hash, #to_hash_groups, #truncate, #truncate_sql, #unfiltered, #ungraphed, #ungrouped, #union, #unlimited, #unordered, #unqualified_column_for, #unused_table_alias, #update, #update_sql, #where, #where_all, #where_each, #where_single_value, #window, #window_sql_append, #with, #with_extend, #with_quote_identifiers, #with_recursive, #with_row_proc, #with_sql, #with_sql_all, #with_sql_delete, #with_sql_each, #with_sql_first, #with_sql_insert, #with_sql_single_value

Methods included from SQL::StringMethods

#escaped_ilike, #escaped_like, #ilike, #like

Methods included from SQL::OrderMethods

#asc, #desc

Methods included from SQL::NumericMethods

#+, #coerce

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 Method Details

#case_expression_sql_append(sql, ce) ⇒ Object

Derby doesn’t support an expression between CASE and WHEN, so remove conditions.



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# File 'lib/sequel/adapters/jdbc/derby.rb', line 190

def case_expression_sql_append(sql, ce)
  super(sql, ce.with_merged_expression)
end

#cast_sql_append(sql, expr, type) ⇒ Object

If the type is String, trim the extra spaces since CHAR is used instead of varchar. This can cause problems if you are casting a char/varchar to a string and the ending whitespace is important.



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# File 'lib/sequel/adapters/jdbc/derby.rb', line 197

def cast_sql_append(sql, expr, type)
  if type == String
    sql << "RTRIM("
    super
    sql << ')'
  else
    super
  end
end

#complex_expression_sql_append(sql, op, args) ⇒ Object 



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# File 'lib/sequel/adapters/jdbc/derby.rb', line 207

def complex_expression_sql_append(sql, op, args)
  case op
  when :%, :'B~'
    complex_expression_emulate_append(sql, op, args)
  when :&, :|, :^, :<<, :>>
    raise Error, "Derby doesn't support the #{op} operator"
  when :**
    sql << 'exp('
    literal_append(sql, args[1])
    sql << ' * ln('
    literal_append(sql, args[0])
    sql << "))"
  when :extract
    sql << args[0].to_s << '('
    literal_append(sql, args[1])
    sql << ')'
  else
    super
  end
end

#supports_group_rollup? ⇒ Boolean

Derby supports GROUP BY ROLLUP (but not CUBE)

Returns:

  • (Boolean) 


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# File 'lib/sequel/adapters/jdbc/derby.rb', line 229

def supports_group_rollup?
  true
end

#supports_is_true? ⇒ Boolean

Derby does not support IS TRUE.

Returns:

  • (Boolean) 


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# File 'lib/sequel/adapters/jdbc/derby.rb', line 234

def supports_is_true?
  false
end

#supports_merge? ⇒ Boolean

Derby 10.11+ supports MERGE.

Returns:

  • (Boolean) 


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# File 'lib/sequel/adapters/jdbc/derby.rb', line 239

def supports_merge?
  db.svn_version >= 1616546
end

#supports_multiple_column_in? ⇒ Boolean

Derby does not support IN/NOT IN with multiple columns

Returns:

  • (Boolean) 


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# File 'lib/sequel/adapters/jdbc/derby.rb', line 244

def supports_multiple_column_in?
  false
end