Class: Sequel::Firebird::Dataset

Inherits:
Dataset show all
Defined in:
lib/sequel/adapters/firebird.rb

Overview

Dataset class for Firebird datasets

Constant Summary collapse

BOOL_TRUE = 
'1'.freeze
BOOL_FALSE = 
'0'.freeze
NULL = 
LiteralString.new('NULL').freeze
COMMA_SEPARATOR = 
', '.freeze
SELECT_CLAUSE_METHODS = 
clause_methods(:select, %w'with distinct limit columns from join where group having compounds order')

Constants inherited from Dataset

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

Instance Attribute Summary

Attributes inherited from Dataset

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

Instance Method Summary collapse

Methods inherited from Dataset

#<<, #[], #[]=, #add_graph_aliases, #aliased_expression_sql, #all, #and, #array_sql, #as, #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?, #except, #exclude, #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, #having, #import, #initialize, #insert_multiple, #insert_sql, #inspect, #intersect, #interval, #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, #reverse, #reverse_order, #schema_and_table, #select, #select_all, #select_append, #select_hash, #select_map, #select_more, #select_order_map, #select_sql, #server, #set, #set_defaults, #set_graph_aliases, #set_overrides, #single_record, #single_value, #sql, #subscript_sql, #sum, #supports_cte?, #supports_distinct_on?, #supports_intersect_except_all?, #supports_is_true?, #supports_join_using?, #supports_modifying_joins?, #supports_multiple_column_in?, #supports_timestamp_timezones?, #supports_timestamp_usecs?, #supports_window_functions?, #to_csv, #to_hash, #truncate, #truncate_sql, #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

Constructor Details

This class inherits a constructor from Sequel::Dataset

Instance Method Details

#fetch_rows(sql, &block) ⇒ Object

Yield all rows returned by executing the given SQL and converting the types.



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# File 'lib/sequel/adapters/firebird.rb', line 204

def fetch_rows(sql, &block)
  execute(sql) do |s|
    begin
      @columns = s.fields.map{|c| output_identifier(c.name)}
      s.fetchall(:symbols_hash).each do |r|
        h = {}
        r.each{|k,v| h[output_identifier(k)] = v}
        yield h
      end
    ensure
      s.close
    end
  end
  self
end

#insert(*values) ⇒ Object

Insert given values into the database.



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

def insert(*values)
  if !@opts[:sql]
    clone(default_server_opts(:sql=>insert_returning_pk_sql(*values))).single_value
  else
    execute_insert(insert_sql(*values), :table=>opts[:from].first,
      :values=>values.size == 1 ? values.first : values)
  end
end

#insert_returning_pk_sql(*values) ⇒ Object

Use the RETURNING clause to return the primary key of the inserted record, if it exists



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# File 'lib/sequel/adapters/firebird.rb', line 231

def insert_returning_pk_sql(*values)
  pk = db.primary_key(opts[:from].first)
  insert_returning_sql(pk ? Sequel::SQL::Identifier.new(pk) : NULL, *values)
end

#insert_returning_sql(returning, *values) ⇒ Object

Use the RETURNING clause to return the columns listed in returning.



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# File 'lib/sequel/adapters/firebird.rb', line 237

def insert_returning_sql(returning, *values)
  "#{insert_sql(*values)} RETURNING #{column_list(Array(returning))}"
end

#insert_select(*values) ⇒ Object

Insert a record returning the record inserted



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# File 'lib/sequel/adapters/firebird.rb', line 242

def insert_select(*values)
  naked.clone(default_server_opts(:sql=>insert_returning_sql(nil, *values))).single_record
end

#requires_sql_standard_datetimes? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sequel/adapters/firebird.rb', line 246

def requires_sql_standard_datetimes?
  true
end

#select_clause_methods ⇒ Object

The order of clauses in the SELECT SQL statement



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# File 'lib/sequel/adapters/firebird.rb', line 251

def select_clause_methods
  SELECT_CLAUSE_METHODS
end

#select_limit_sql(sql) ⇒ Object 



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# File 'lib/sequel/adapters/firebird.rb', line 255

def select_limit_sql(sql)
  sql << " FIRST #{@opts[:limit]}" if @opts[:limit]
  sql << " SKIP #{@opts[:offset]}" if @opts[:offset]
end

#supports_intersect_except? ⇒ Boolean

Firebird does not support INTERSECT or EXCEPT

Returns:

  • (Boolean) 


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# File 'lib/sequel/adapters/firebird.rb', line 261

def supports_intersect_except?
  false
end