module PG::BasicTypeRegistry

Constants

CODERS_BY_NAME

The key of this hash maps to the `typname` column from the table. encoder_map is then dynamically built with oids as the key and Type objects as values.

ValidDirections
ValidFormats

Private Class Methods

alias_type(format, new, old) click to toggle source

Alias the old type to the new type.

# File lib/pg/basic_type_mapping.rb, line 147
def self.alias_type(format, new, old)
        CODERS_BY_NAME[format][:encoder][new] = CODERS_BY_NAME[format][:encoder][old]
        CODERS_BY_NAME[format][:decoder][new] = CODERS_BY_NAME[format][:decoder][old]
end
register_type(format, name, encoder_class, decoder_class) click to toggle source

Register an OID type named name with a typecasting encoder and decoder object in type. name should correspond to the `typname` column in the `pg_type` table.

# File lib/pg/basic_type_mapping.rb, line 140
def self.register_type(format, name, encoder_class, decoder_class)
        CODERS_BY_NAME[format] ||= { encoder: {}, decoder: {} }
        CODERS_BY_NAME[format][:encoder][name] = encoder_class.new(name: name, format: format) if encoder_class
        CODERS_BY_NAME[format][:decoder][name] = decoder_class.new(name: name, format: format) if decoder_class
end

Protected Instance Methods

check_format_and_direction(format, direction) click to toggle source
# File lib/pg/basic_type_mapping.rb, line 126
def check_format_and_direction(format, direction)
        raise(ArgumentError, "Invalid format value %p" % format) unless ValidFormats[format]
        raise(ArgumentError, "Invalid direction %p" % direction) unless ValidDirections[direction]
end

Private Instance Methods

build_coder_maps(connection) click to toggle source
# File lib/pg/basic_type_mapping.rb, line 97
        def build_coder_maps(connection)
                if supports_ranges?(connection)
                        result = connection.exec <<-SQL
                                SELECT t.oid, t.typname, t.typelem, t.typdelim, t.typinput, r.rngsubtype
                                FROM pg_type as t
                                LEFT JOIN pg_range as r ON oid = rngtypid
                        SQL
                else
                        result = connection.exec <<-SQL
                                SELECT t.oid, t.typname, t.typelem, t.typdelim, t.typinput
                                FROM pg_type as t
                        SQL
                end

                [
                        [0, :encoder, PG::TextEncoder::Array],
                        [0, :decoder, PG::TextDecoder::Array],
                        [1, :encoder, nil],
                        [1, :decoder, nil],
                ].inject([]) do |h, (format, direction, arraycoder)|
                        h[format] ||= {}
                        h[format][direction] = CoderMap.new result, CODERS_BY_NAME[format][direction], format, arraycoder
                        h
                end
        end
supports_ranges?(connection) click to toggle source
# File lib/pg/basic_type_mapping.rb, line 93
def supports_ranges?(connection)
        connection.server_version >= 90200
end