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

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

Overview

Dataset class for Derby datasets accessed via JDBC.

Constant Summary collapse

PAREN_CLOSE = 
Dataset::PAREN_CLOSE
PAREN_OPEN = 
Dataset::PAREN_OPEN
OFFSET = 
Dataset::OFFSET
CAST_STRING_OPEN = 
"RTRIM(".freeze
BLOB_OPEN = 
"CAST(X'".freeze
BLOB_CLOSE = 
"' AS BLOB)".freeze
HSTAR = 
"H*".freeze
TIME_FORMAT = 
"'%H:%M:%S'".freeze
DEFAULT_FROM = 
" FROM sysibm.sysdummy1".freeze
ROWS = 
" ROWS".freeze
FETCH_FIRST = 
" FETCH FIRST ".freeze
ROWS_ONLY = 
" ROWS ONLY".freeze
BOOL_TRUE_OLD = 
'(1 = 1)'.freeze
BOOL_FALSE_OLD = 
'(1 = 0)'.freeze
BOOL_TRUE = 
'TRUE'.freeze
BOOL_FALSE = 
'FALSE'.freeze
EMULATED_FUNCTION_MAP = 
{:char_length=>'length'.freeze}

Constants inherited from Sequel::JDBC::Dataset

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

Constants inherited from Dataset

Dataset::ACTION_METHODS, Dataset::ALL, Dataset::AND_SEPARATOR, Dataset::APOS, Dataset::APOS_RE, Dataset::ARG_BLOCK_ERROR_MSG, Dataset::ARRAY_ACCESS_ERROR_MSG, Dataset::ARRAY_EMPTY, Dataset::AS, Dataset::ASC, Dataset::BACKSLASH, Dataset::BITCOMP_CLOSE, Dataset::BITCOMP_OPEN, Dataset::BITWISE_METHOD_MAP, Dataset::BRACKET_CLOSE, Dataset::BRACKET_OPEN, Dataset::CASE_ELSE, Dataset::CASE_END, Dataset::CASE_OPEN, Dataset::CASE_THEN, Dataset::CASE_WHEN, Dataset::CAST_OPEN, Dataset::COLON, Dataset::COLUMN_CHANGE_OPTS, Dataset::COLUMN_REF_RE1, Dataset::COLUMN_REF_RE2, Dataset::COLUMN_REF_RE3, Dataset::COMMA, Dataset::COMMA_SEPARATOR, Dataset::CONDITIONED_JOIN_TYPES, Dataset::CONDITION_FALSE, Dataset::CONDITION_TRUE, Dataset::COUNT_FROM_SELF_OPTS, Dataset::COUNT_OF_ALL_AS_COUNT, Dataset::DATASET_ALIAS_BASE_NAME, Dataset::DATETIME_SECFRACTION_ARG, Dataset::DEFAULT, Dataset::DEFAULT_PREPARED_STATEMENT_MODULE_METHODS, Dataset::DEFAULT_VALUES, Dataset::DELETE, Dataset::DESC, Dataset::DISTINCT, Dataset::DOT, Dataset::DOUBLE_APOS, Dataset::DOUBLE_QUOTE, Dataset::EMPTY_PARENS, Dataset::EQUAL, Dataset::ESCAPE, Dataset::EXISTS, Dataset::EXTENSIONS, Dataset::EXTRACT, Dataset::FILTER, Dataset::FORMAT_DATE, Dataset::FORMAT_DATE_STANDARD, Dataset::FORMAT_OFFSET, Dataset::FORMAT_TIMESTAMP_RE, Dataset::FORMAT_USEC, Dataset::FOR_UPDATE, Dataset::FRAME_ALL, Dataset::FRAME_ROWS, Dataset::FROM, Dataset::FUNCTION_DISTINCT, Dataset::GROUP_BY, Dataset::HAVING, Dataset::IMPORT_ERROR_MSG, Dataset::INSERT, Dataset::INTO, Dataset::IS_LITERALS, Dataset::IS_OPERATORS, Dataset::JOIN_METHODS, Dataset::LATERAL, Dataset::LIKE_OPERATORS, Dataset::LIMIT, Dataset::MUTATION_METHODS, Dataset::NON_SQL_OPTIONS, Dataset::NOTIMPL_MSG, Dataset::NOT_SPACE, Dataset::NULL, Dataset::NULLS_FIRST, Dataset::NULLS_LAST, Dataset::N_ARITY_OPERATORS, Dataset::ON, Dataset::ON_PAREN, Dataset::OPTS, Dataset::ORDER_BY, Dataset::ORDER_BY_NS, Dataset::OVER, Dataset::PAREN_SPACE_OPEN, Dataset::PARTITION_BY, Dataset::PREPARED_ARG_PLACEHOLDER, Dataset::PREPARED_STATEMENT_MODULE_CODE, Dataset::QUALIFY_KEYS, Dataset::QUERY_METHODS, Dataset::QUESTION_MARK, Dataset::QUESTION_MARK_RE, Dataset::QUOTE, Dataset::QUOTE_RE, Dataset::REGEXP_OPERATORS, Dataset::RETURNING, Dataset::SELECT, Dataset::SET, Dataset::SPACE, Dataset::SPACE_WITH, Dataset::SQL_WITH, Dataset::STANDARD_TIMESTAMP_FORMAT, Dataset::TILDE, Dataset::TIMESTAMP_FORMAT, Dataset::TWO_ARITY_OPERATORS, Dataset::UNCONDITIONED_JOIN_TYPES, Dataset::UNDERSCORE, Dataset::UNION_ALL_SELECT, Dataset::UPDATE, Dataset::USING, Dataset::VALUES, Dataset::WHERE, Dataset::WILDCARD, Dataset::WITHIN_GROUP, Dataset::WITH_ORDINALITY

Instance Attribute Summary

Attributes inherited from Sequel::JDBC::Dataset

#convert_types

Attributes inherited from Dataset

#columns, #db, #opts, #row_proc

Instance Method Summary collapse

Methods inherited from Sequel::JDBC::Dataset

#fetch_rows, #prepare, #with_fetch_size

Methods inherited from Dataset

#<<, #==, #[], #add_graph_aliases, #aliased_expression_sql_append, #all, #and, #array_sql_append, #avg, #bind, #boolean_constant_sql_append, #call, clause_methods, #clone, #column_all_sql_append, #columns!, #constant_sql_append, #count, #current_datetime, def_mutation_method, def_sql_method, #delayed_evaluation_sql_append, #delete, #distinct, #dup, #each, #each_server, #empty?, #eql?, #escape_like, #except, #exclude, #exclude_having, #exclude_where, #exists, #extension, #extension!, #filter, #first, #first!, #first_source, #first_source_alias, #first_source_table, #for_update, #freeze, #from, #from_self, #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, #identifier_input_method, #identifier_input_method=, #identifier_output_method, #identifier_output_method=, #import, #initialize, #insert, #insert_sql, #inspect, #intersect, #interval, #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, #lock_style, #map, #max, #min, #multi_insert, #multi_insert_sql, #naked, #naked!, #negative_boolean_constant_sql_append, #offset, #or, #order, #order_append, #order_by, #order_more, #order_prepend, #ordered_expression_sql_append, #paged_each, #placeholder_literal_string_sql_append, #prepare, #provides_accurate_rows_matched?, #qualified_identifier_sql_append, #qualify, #quote_identifier_append, #quote_identifiers=, #quote_identifiers?, #quote_schema_table_append, #quoted_identifier_append, #range, #recursive_cte_requires_column_aliases?, register_extension, #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_hash_groups, #select_map, #select_more, #select_order_map, #server, #server?, #set_graph_aliases, #single_record, #single_record!, #single_value, #single_value!, #skip_locked, #split_alias, #split_qualifiers, #sql, #subscript_sql_append, #sum, #supports_cte?, #supports_cte_in_subqueries?, #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_offsets_in_correlated_subqueries?, #supports_ordered_distinct_on?, #supports_regexp?, #supports_replace?, #supports_returning?, #supports_select_all_and_column?, #supports_skip_locked?, #supports_timestamp_timezones?, #supports_timestamp_usecs?, #supports_where_true?, #supports_window_functions?, #to_hash, #to_hash_groups, #truncate, #truncate_sql, #unbind, #unfiltered, #ungraphed, #ungrouped, #union, #unlimited, #unordered, #unqualified_column_for, #unused_table_alias, #update, #update_sql, #where, #window_sql_append, #with, #with_recursive, #with_sql, #with_sql_all, #with_sql_delete, #with_sql_each, #with_sql_first, #with_sql_insert, #with_sql_single_value

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

#+, #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 204

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 211

def cast_sql_append(sql, expr, type)
  if type == String
    sql << CAST_STRING_OPEN
    super
    sql << PAREN_CLOSE
  else
    super
  end
end

#complex_expression_sql_append(sql, op, args) ⇒ Object 



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# File 'lib/sequel/adapters/jdbc/derby.rb', line 221

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.at(0).to_s << PAREN_OPEN
    literal_append(sql, args.at(1))
    sql << PAREN_CLOSE
  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 243

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 248

def supports_is_true?
  false
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 253

def supports_multiple_column_in?
  false
end