Module: Sequel::Pervasive::DatasetMethods
- Defined in:
- lib/sequel/pervasive_adapter.rb
Constant Summary collapse
- SELECT_CLAUSE_METHODS =
Dataset.clause_methods(:select, %w'limit distinct columns from with join where group order having compounds')
Instance Method Summary collapse
- #convert_odbc_value(v, column_type = nil) ⇒ Object
- #fetch_rows(sql, &block) ⇒ Object
- #get_column_type(column_name) ⇒ Object
- #quoted_identifier(name, convert = true) ⇒ Object
-
#select_fields(hash) ⇒ Object
Take a table name and write out the field names for that table in this style: “‘DUDES`.`KID - DATE`”.lit where the table name is :dudes, and fields are [:kid_date].
Instance Method Details
#convert_odbc_value(v, column_type = nil) ⇒ Object
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# File 'lib/sequel/pervasive_adapter.rb', line 95 def convert_odbc_value(v, column_type=nil) case column_type when :date then Date.from_fos_days(v.to_i) when :time then DateTime.from_fos_date_time(0,v.to_i) else v = v.unpack('A*')[0] if v.is_a? String super(v) end end |
#fetch_rows(sql, &block) ⇒ Object
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# File 'lib/sequel/pervasive_adapter.rb', line 76 def fetch_rows(sql, &block) execute(sql) do |s| i = -1 cols = s.columns(true).map{|c| [output_identifier(c.name), i+=1]} @columns = cols.map{|c| c.at(0)} if rows = s.fetch_all rows.each do |row| hash = {} cols.each{|n, i| hash[n] = convert_odbc_value(row[i], get_column_type(@columns[i]))} yield hash end end end self end |
#get_column_type(column_name) ⇒ Object
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# File 'lib/sequel/pervasive_adapter.rb', line 107 def get_column_type(column_name) if respond_to?(:model) and model.respond_to?(:datatypes) and model.datatypes and model.datatypes[column_name] return model.datatypes[column_name][:type] end nil end |
#quoted_identifier(name, convert = true) ⇒ Object
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# File 'lib/sequel/pervasive_adapter.rb', line 116 def quoted_identifier(name, convert=true) convert ? "\"#{convert_aliased_col_to_real_col(name)}\"" : "\"#{name}\"" end |
#select_fields(hash) ⇒ Object
Take a table name and write out the field names for that table in this style: “‘DUDES`.`KID - DATE`”.lit where the table name is :dudes, and fields are [:kid_date]
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# File 'lib/sequel/pervasive_adapter.rb', line 123 def select_fields(hash) new_hash = Hash.new{|k, v| k[v]= {}} hash.each do |association, fields| new_hash[association][:fields] = fields if association == :self new_hash[association][:model] = self.model new_hash[association][:association_name] = self.model.table_name elsif association.to_s.match /(\w+)__(\w+)/ # crew_legs__position_code # not an assocation on the current model .. but another one new_hash[association][:association_name] = $2.to_s.upcase new_hash[association][:model] = model.association_reflection($1.to_sym)[:class].association_reflection($2.to_sym)[:class] else raise(Sequel::Error, "Invalid #{model} association: #{association}") unless model.association_reflection(association) new_hash[association][:association_name] = association.to_s.upcase new_hash[association][:model] = model.association_reflection(association)[:class] end fields = fields + new_hash[association][:model].primary_key unless fields[0] == :* new_hash[association][:fields] = fields end s = [] new_hash.each do |association, hash| if hash[:fields].size == 1 and hash[:fields][0] == :* s << "#{quoted_identifier(hash[:association_name], false)}.*".lit else s << hash[:fields].collect do |field| raw_field_name = convert_aliased_col_to_real_col_with_model(field, hash[:model]) as_alias = '' raw_field_name if association != :self and ( hash[:model].primary_key.include? field or field_duplicate(new_hash, association, field) ) as_field_name = "#{hash[:association_name]}_#{raw_field_name}" as_alias = "AS #{quoted_identifier(as_field_name, false)}" end "#{quoted_identifier(hash[:association_name], false)}.#{quoted_identifier(raw_field_name, false)} #{as_alias}".lit end end end clone(:select => s.flatten) end |