Module: Cawcaw::Command::Postgresql::Table

Includes:
Database::Table
Defined in:
lib/cawcaw/command/postgresql/table.rb

Class Method Summary collapse

Methods included from Database::Table

included

Methods included from Database::Table::ClassMethods

#count_table_sizes, #get_full_table_paths, #initialize_params, #run

Class Method Details

.count_table_sizes(full_table_paths, params) ⇒ Object 



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# File 'lib/cawcaw/command/postgresql/table.rb', line 35

def self.count_table_sizes(full_table_paths, params)
  ActiveRecord::Base.establish_connection(params)
  model_class = ActiveRecord::Base
  if false && params[:stats_flag]
    count_sql = <<-EOF
select nspname || '.' || relname as full_table_path, reltuples as record_size, relpages * 8 as byte_size
from pg_class
inner join pg_namespace
on pg_class.relnamespace = pg_namespace.oid
where relkind='r'
  and (
    #{
      full_table_paths.map{|full_table_path|
"(nspname || '.' || relname) = #{model_class.sanitize(full_table_path)}"
      }.join(" or ")
    }
  )
    EOF
  else
    count_sql = <<-EOF
#{
  full_table_paths.map{|full_table_path|
    "(select #{model_class.sanitize(full_table_path)} as full_table_path, count(*) as record_size from #{full_table_path})"
  }.join(" union ")
}
    EOF
  end
  results = ActiveRecord::Base.connection.execute count_sql
  return results
end

.get_full_table_paths(table_paths, params) ⇒ Object 



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# File 'lib/cawcaw/command/postgresql/table.rb', line 20

def self.get_full_table_paths(table_paths, params)
  full_table_paths = {}
  table_paths.each do |table_path|
    table_path_pair = table_path.split(/\./)
    if /[a-z][a-z0-9_]*(\.[a-z][a-z0-9_]*)?/ !~ table_path
      Cawcaw.logger.error("#{params[:adapter_name]} table name '#{table_path}' is invalid")
      return nil
    end
    table_name = table_path_pair.pop
    schema_name = table_path_pair.pop || "public"
    full_table_paths[table_path] = "#{schema_name}.#{table_name}"
  end
  return full_table_paths
end

.initialize_params(params) ⇒ Object 



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# File 'lib/cawcaw/command/postgresql/table.rb', line 7

def self.initialize_params(params)
  params[:adapter] ||= "postgresql"
  params[:host] ||= "localhost"
  params[:port] ||= 5432
  params[:adapter_name] ||= params[:adapter]
  
  params[:graph_title] ||= "#{params[:adapter_name]} records"
  params[:graph_args] ||= "--base 1000"
  params[:graph_vlabel] ||= "records"
  params[:graph_category] ||= params[:adapter_name]
  params[:graph_info] ||= "#{params[:adapter_name]} record size"
end