Class: KmdbPartitions

Inherits:
ActiveRecord::Migration
  • Object
show all
Defined in:
lib/kmdb/migrations/02_kmdb_partitions.rb

Instance Method Summary collapse

Instance Method Details

#downObject



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# File 'lib/kmdb/migrations/02_kmdb_partitions.rb', line 25

def down
end

#upObject



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# File 'lib/kmdb/migrations/02_kmdb_partitions.rb', line 11

def up
  %w(events properties aliases).each do |t|
    sql = %Q{
      ALTER TABLE #{t} CHANGE id id BIGINT NOT NULL
      ALTER TABLE #{t} DROP PRIMARY KEY
      CREATE UNIQUE INDEX index_events_partition ON #{t} (t, id)
      CREATE INDEX index_events_id ON #{t} (id)
      ALTER TABLE #{t} CHANGE id id BIGINT NOT NULL AUTO_INCREMENT
      ALTER TABLE #{t} PARTITION BY RANGE COLUMNS (t) (PARTITION pLast VALUES LESS THAN MAXVALUE)
    }
    sql.strip.split(/\n/).each { |stmt| execute stmt.strip }
  end
end