class Sequel::Postgres::CreatePartitionOfTableGenerator

Generator used for creating tables that are partitions of other tables.

Constants

MAXVALUE
MINVALUE

Public Class Methods

new(&block) click to toggle source
    # File lib/sequel/adapters/shared/postgres.rb
156 def initialize(&block)
157   instance_exec(&block)
158 end

Public Instance Methods

default() click to toggle source

Sets that this is a default partition, where values not in other partitions are stored.

    # File lib/sequel/adapters/shared/postgres.rb
201 def default
202   @default = true
203 end
from(*v) click to toggle source

Assumes range partitioning, sets the inclusive minimum value of the range for this partition.

    # File lib/sequel/adapters/shared/postgres.rb
174 def from(*v)
175   @from = v
176 end
hash_values() click to toggle source

The modulus and remainder to use for this partition for a hash partition.

    # File lib/sequel/adapters/shared/postgres.rb
216 def hash_values
217   [@modulus, @remainder]
218 end
list() click to toggle source

The values to include in this partition for a list partition.

    # File lib/sequel/adapters/shared/postgres.rb
211 def list
212   @in
213 end
maxvalue() click to toggle source

The minimum value of the data type used in range partitions, useful as an argument to to.

    # File lib/sequel/adapters/shared/postgres.rb
168 def maxvalue
169   MAXVALUE
170 end
minvalue() click to toggle source

The minimum value of the data type used in range partitions, useful as an argument to from.

    # File lib/sequel/adapters/shared/postgres.rb
162 def minvalue
163   MINVALUE
164 end
modulus(v) click to toggle source

Assumes hash partitioning, sets the modulus for this parition.

    # File lib/sequel/adapters/shared/postgres.rb
190 def modulus(v)
191   @modulus = v
192 end
partition_type() click to toggle source

Determine the appropriate partition type for this partition by which methods were called on it.

    # File lib/sequel/adapters/shared/postgres.rb
222 def partition_type
223   raise Error, "Unable to determine partition type, multiple different partitioning methods called" if [@from || @to, @list, @modulus || @remainder, @default].compact.length > 1
224 
225   if @from || @to
226     raise Error, "must call both from and to when creating a partition of a table if calling either" unless @from && @to
227     :range
228   elsif @in
229     :list
230   elsif @modulus || @remainder
231     raise Error, "must call both modulus and remainder when creating a partition of a table if calling either" unless @modulus && @remainder
232     :hash
233   elsif @default
234     :default
235   else
236     raise Error, "unable to determine partition type, no partitioning methods called"
237   end
238 end
range() click to toggle source

The from and to values of this partition for a range partition.

    # File lib/sequel/adapters/shared/postgres.rb
206 def range
207   [@from, @to]
208 end
remainder(v) click to toggle source

Assumes hash partitioning, sets the remainder for this parition.

    # File lib/sequel/adapters/shared/postgres.rb
195 def remainder(v)
196   @remainder = v
197 end
to(*v) click to toggle source

Assumes range partitioning, sets the exclusive maximum value of the range for this partition.

    # File lib/sequel/adapters/shared/postgres.rb
180 def to(*v)
181   @to = v
182 end
values_in(*v) click to toggle source

Assumes list partitioning, sets the values to be included in this partition.

    # File lib/sequel/adapters/shared/postgres.rb
185 def values_in(*v)
186   @in = v
187 end