Module: PgPartitioner::SeparationType::Quater

Defined in:
lib/pg_partitioner/separation_type/quater.rb

Instance Method Summary collapse

Instance Method Details

#create_current_quater_table ⇒ Object 



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# File 'lib/pg_partitioner/separation_type/quater.rb', line 4

def create_current_quater_table
  create_quater_table(Date.today)
end

#create_next_quater_table ⇒ Object 



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# File 'lib/pg_partitioner/separation_type/quater.rb', line 8

def create_next_quater_table
  create_quater_table(Date.today.next_quarter)
end

#create_partitioning_by_quater_triggers ⇒ Object 



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# File 'lib/pg_partitioner/separation_type/quater.rb', line 32

def create_partitioning_by_quater_triggers
  sql = "CREATE OR REPLACE FUNCTION #{table_name}_insert_trigger() RETURNS trigger AS
    $$
     DECLARE
       curY varchar(4);
       curQ varchar(1);
       tbl varchar(121);
     BEGIN
        select cast(DATE_PART('year', new.#{parting_column}) as varchar) into curY;
        select lpad(cast(DATE_PART('quarter', new.#{parting_column}) as varchar), 2, '0') into curQ;
        tbl := '#{table_name}_y' || curY || 'q' || curQ;
        EXECUTE format('INSERT into %I values ($1.*);', tbl) USING NEW;
        return NEW;
     END;
     $$
   LANGUAGE plpgsql;

   CREATE TRIGGER #{table_name}_insert
   BEFORE INSERT ON #{table_name}
   FOR EACH ROW
   EXECUTE PROCEDURE #{table_name}_insert_trigger();

   -- Trigger function to delete from the master table after the insert
   CREATE OR REPLACE FUNCTION #{table_name}_delete_trigger() RETURNS trigger
       AS $$
   DECLARE
       r #{table_name}%rowtype;
   BEGIN
       DELETE FROM ONLY #{table_name} where id = new.id returning * into r;
       RETURN r;
   end;
   $$
   LANGUAGE plpgsql;

   CREATE TRIGGER #{table_name}_after_insert
   AFTER INSERT ON #{table_name}
   FOR EACH ROW
   EXECUTE PROCEDURE #{table_name}_delete_trigger();"

  execute_sql(sql)
end

#create_quater_table(date = Date.today) ⇒ Object 



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# File 'lib/pg_partitioner/separation_type/quater.rb', line 12

def create_quater_table(date = Date.today)
  date_start = date.at_beginning_of_quarter
  date_end = date.end_of_quarter.next_month.at_beginning_of_month
  partition_table_name = name_of_partition_table(date, type: :quater)
  return 'Already exists' if connection.table_exists? partition_table_name

  sql = "CREATE TABLE IF NOT EXISTS #{partition_table_name} (
         CHECK ( #{parting_column} >= DATE('#{date_start}') AND #{parting_column} < DATE('#{date_end}') )
         ) INHERITS (#{table_name});"
  execute_sql(sql)
  sql = "ALTER TABLE #{partition_table_name} ADD PRIMARY KEY (id);"
  execute_sql(sql)

  disable_autovacuum(partition_table_name)
  create_partition_indexes(partition_table_name)
  create_partition_named_indexes(partition_table_name)
  create_partition_unique_indexes(partition_table_name)
  create_partition_named_unique_indexes(partition_table_name)
end