Module: Backups::Stats::Mysql

Includes:
Driver::Mysql
Included in:
Adapter::Mysql, Verify::Mysql
Defined in:
lib/backups/stats/mysql.rb

Instance Method Summary collapse

Methods included from Driver::Mysql

#connect, #exec_query, #get_result, #get_results

Instance Method Details

#get_database_names ⇒ Object 



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# File 'lib/backups/stats/mysql.rb', line 54

def get_database_names
  query = <<-EOS
    SELECT
            SCHEMA_NAME `database`
    FROM
            INFORMATION_SCHEMA.SCHEMATA
    WHERE
            SCHEMA_NAME NOT IN ('#{get_excluded_schemas.join("', '")}')
  EOS

  get_results(query)
end

#get_database_stats(database) ⇒ Object 



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# File 'lib/backups/stats/mysql.rb', line 37

def get_database_stats(database)
  tables = get_database_tables(database)
  stats  = {}
  tables.each do |item|
    table = item['table']

    stats[table] = get_table_stats(database, table)
    $LOGGER.debug "Writing stats for table #{database}.#{table}: #{stats[table]}"
  end

  return stats
end

#get_database_tables(database) ⇒ Object 



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# File 'lib/backups/stats/mysql.rb', line 24

def get_database_tables(database)
  query = <<-EOS
    SELECT
            TABLE_NAME `table`
    FROM
            INFORMATION_SCHEMA.TABLES
    WHERE
            TABLE_SCHEMA = '#{database}'
    EOS

  get_results(query)
end

#get_excluded_schemas ⇒ Object 



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# File 'lib/backups/stats/mysql.rb', line 50

def get_excluded_schemas
  ["information_schema", "performance_schema", "mysql"]
end

#get_server_tables(databases = nil) ⇒ Object 



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# File 'lib/backups/stats/mysql.rb', line 7

def get_server_tables(databases = nil)
  query = <<-EOS
    SELECT
            TABLE_SCHEMA `database`,
            TABLE_NAME `table`
    FROM
            INFORMATION_SCHEMA.TABLES
    WHERE
            TABLE_SCHEMA NOT IN ('#{get_excluded_schemas.join("', '")}')
  EOS

  query += "AND TABLE_SCHEMA IN ('#{databases.join("', '")}')" if databases
  query += "ORDER BY TABLE_SCHEMA ASC"

  get_results(query)
end

#get_table_stats(database, table) ⇒ Object 



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# File 'lib/backups/stats/mysql.rb', line 67

def get_table_stats(database, table)
  query = <<-EOS
    SELECT
            COUNT(*) `rows`
    FROM
            `#{database}`.`#{table}`
  EOS

  get_result(query)
end