Class: Baza::Driver::Mysql::Table

Inherits:
Table
  • Object
show all
Defined in:
lib/baza/drivers/mysql/table.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Table

#inspect, #to_s

Constructor Details

#initialize(args) ⇒ Table

Returns a new instance of Table.



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# File 'lib/baza/drivers/mysql/table.rb', line 4

def initialize(args)
  @args = args
  @db = args[:db]
  @data = args[:data]
  @list = Wref::Map.new
  @indexes_list = Wref::Map.new
  @name = @data[:Name].to_sym
  @tables = args[:tables]

  raise "Could not figure out name from: '#{@data}'." if @data[:Name].to_s.strip.empty?
end

Instance Attribute Details

#list ⇒ Object (readonly)

Returns the value of attribute list.



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# File 'lib/baza/drivers/mysql/table.rb', line 2

def list
  @list
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/baza/drivers/mysql/table.rb', line 2

def name
  @name
end

Class Method Details

.create_indexes(index_arr, args = {}) ⇒ Object 



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# File 'lib/baza/drivers/mysql/table.rb', line 157

def self.create_indexes(index_arr, args = {})
  db = args[:db]

  if args[:return_sql]
    sql = ""
    first = true
  end

  index_arr.each do |index_data|
    if !args[:return_sql]
      sql = ""
    end

    if args[:create] || !args.key?(:create)
      sql << "CREATE"
    end

    if index_data.is_a?(String) || index_data.is_a?(Symbol)
      index_data = {name: index_data, columns: [index_data]}
    end

    raise "No name was given: '#{index_data}'." if !index_data.key?(:name) || index_data[:name].to_s.strip.empty?
    raise "No columns was given on index: '#{index_data[:name]}'." if !index_data[:columns] || index_data[:columns].empty?

    if args[:return_sql]
      if first
        first = false
      else
        sql << ", "
      end
    end

    sql << " UNIQUE" if index_data[:unique]
    sql << " INDEX `#{db.esc_col(index_data[:name])}`"

    if args[:on_table] || !args.key?(:on_table)
      sql << " ON `#{db.esc_table(args[:table_name])}`"
    end

    sql << " ("

    first = true
    index_data[:columns].each do |col_name|
      sql << ", " if !first
      first = false if first

      sql << "`#{db.esc_col(col_name)}`"
    end

    sql << ")"

    if !args[:return_sql]
      db.query(sql)
    end
  end

  if args[:return_sql]
    return sql
  else
    return nil
  end
end

Instance Method Details

#__object_unique_id__ ⇒ Object

Used to validate in Wref::Map.



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# File 'lib/baza/drivers/mysql/table.rb', line 21

def __object_unique_id__
  return @data[:Name]
end

#clone(newname, args = {}) ⇒ Object 



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# File 'lib/baza/drivers/mysql/table.rb', line 267

def clone(newname, args = {})
  raise "Invalid name." if newname.to_s.strip.empty?

  sql = "CREATE TABLE `#{@db.esc_table(newname)}` ("
  first = true
  pkey_found = false
  pkeys = []

  columns do |col|
    sql << ", " unless first
    first = false if first

    col_data = col.data
    pkey_found = true if !pkey_found && col_data[:primarykey] && args[:force_single_pkey]

    if args[:no_pkey] || (pkey_found && col_data[:primarykey] && args[:force_single_pkey])
      col_data[:primarykey] = false
    end

    if col_data[:primarykey]
      pkeys << col_data[:name]
      col_data.delete(:primarykey)
    end

    if args[:all_cols_storage]
      col_data[:storage] = args[:all_cols_storage]
    end

    sql << @db.cols.data_sql(col_data)
  end

  unless pkeys.empty?
    sql << ", PRIMARY KEY ("

    first = true
    pkeys.each do |pkey|
      sql << ", " unless first
      first = false if first
      sql << "`#{@db.esc_col(pkey)}`"
    end

    sql << ")"
  end

  sql << ")"
  sql << " TABLESPACE #{args[:tablespace]}" if args[:tablespace]
  sql << " ENGINE=#{args[:engine]}" if args[:engine]
  sql << ";"

  #Create table.
  @db.query(sql)


  #Insert data of previous data in a single query.
  @db.query("INSERT INTO `#{@db.esc_table(newname)}` SELECT * FROM `#{@db.esc_table(self.name)}`")


  #Create indexes.
  new_table = @db.tables[newname]
  indexes_list = []
  indexes do |index|
    indexes_list << index.data unless index.primary?
  end

  new_table.create_indexes(indexes_list)


  #Return new table.
  return new_table
end

#column(name) ⇒ Object

Raises:

  • (Errno::ENOENT) 


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# File 'lib/baza/drivers/mysql/table.rb', line 48

def column(name)
  name = name.to_sym

  if col = @list.get(name)
    return @list[name]
  end

  self.columns(:name => name) do |col|
    return col if col.name == name
  end

  raise Errno::ENOENT, "Column not found: '#{name}'."
end

#columns(args = nil) ⇒ Object 



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# File 'lib/baza/drivers/mysql/table.rb', line 62

def columns(args = nil)
  @db.cols
  ret = {}
  sql = "SHOW FULL COLUMNS FROM `#{@db.esc_table(name)}`"
  sql << " WHERE `Field` = '#{@db.esc(args[:name])}'" if args && args.key?(:name)

  @db.q(sql) do |d_cols|
    column_name = d_cols[:Field].to_sym
    obj = @list.get(name)

    unless obj
      obj = Baza::Driver::Mysql::Column.new(
        table_name: name,
        db: @db,
        data: d_cols
      )
      @list[column_name] = obj
    end

    if block_given?
      yield(obj)
    else
      ret[column_name] = obj
    end
  end

  if block_given?
    return nil
  else
    return ret
  end
end

#create_columns(col_arr) ⇒ Object 



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# File 'lib/baza/drivers/mysql/table.rb', line 144

def create_columns(col_arr)
  @db.transaction do
    col_arr.each do |col_data|
      sql = "ALTER TABLE `#{self.name}` ADD COLUMN #{@db.cols.data_sql(col_data)};"
      @db.query(sql)
    end
  end
end

#create_indexes(index_arr, args = {}) ⇒ Object 



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# File 'lib/baza/drivers/mysql/table.rb', line 153

def create_indexes(index_arr, args = {})
  return Baza::Driver::Mysql::Table.create_indexes(index_arr, args.merge(:table_name => self.name, :db => @db))
end

#data ⇒ Object 



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# File 'lib/baza/drivers/mysql/table.rb', line 245

def data
  ret = {
    name: self.name,
    columns: [],
    indexes: []
  }

  columns.each do |name, column|
    ret[:columns] << column.data
  end

  indexes.each do |name, index|
    ret[:indexes] << index.data if name != "PRIMARY"
  end

  return ret
end

#drop ⇒ Object 



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# File 'lib/baza/drivers/mysql/table.rb', line 25

def drop
  raise "Cant drop native table: '#{self.name}'." if self.native?
  @db.query("DROP TABLE `#{@db.esc_table(self.name)}`")
  @tables.__send__(:remove_from_list, self)
  return nil
end

#engine ⇒ Object

Returns the current engine of the table.



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# File 'lib/baza/drivers/mysql/table.rb', line 339

def engine
  return @data[:Engine]
end

#engine=(newengine) ⇒ Object

Changes the engine for a table.



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# File 'lib/baza/drivers/mysql/table.rb', line 344

def engine=(newengine)
  raise "Invalid engine: '#{newengine}'." unless newengine.to_s.match(/^[A-z]+$/)
  @db.query("ALTER TABLE `#{@db.esc_table(self.name)}` ENGINE = #{newengine}") if self.engine.to_s != newengine.to_s
  @data[:Engine] = newengine
end

#index(name) ⇒ Object

Raises:

  • (Errno::ENOENT) 


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# File 'lib/baza/drivers/mysql/table.rb', line 130

def index(name)
  name = name.to_s

  if index = @indexes_list.get(name)
    return index
  end

  indexes(name: name) do |index|
    return index if index.name.to_s == name
  end

  raise Errno::ENOENT, "Index not found: #{name}."
end

#indexes(args = nil) ⇒ Object 



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# File 'lib/baza/drivers/mysql/table.rb', line 95

def indexes(args = nil)
  @db.indexes
  ret = {}

  sql = "SHOW INDEX FROM `#{@db.esc_table(name)}`"
  sql << " WHERE `Key_name` = '#{@db.esc(args[:name])}'" if args && args.key?(:name)

  @db.q(sql) do |d_indexes|
    next if d_indexes[:Key_name] == "PRIMARY"
    obj = @indexes_list.get(d_indexes[:Key_name].to_s)

    unless obj
      obj = Baza::Driver::Mysql::Index.new(
        table_name: name,
        db: @db,
        data: d_indexes
      )
      obj.columns << d_indexes[:Column_name]
      @indexes_list[d_indexes[:Key_name].to_s] = obj
    end

    if block_given?
      yield obj
    else
      ret[d_indexes[:Key_name].to_s] = obj
    end
  end

  if block_given?
    return nil
  else
    return ret
  end
end

#insert(data) ⇒ Object 



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# File 'lib/baza/drivers/mysql/table.rb', line 263

def insert(data)
  @db.insert(self.name, data)
end

#native? ⇒ Boolean

Returns true if the table is safe to drop.

Returns:

  • (Boolean) 


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# File 'lib/baza/drivers/mysql/table.rb', line 33

def native?
  data = @db.q("SELECT DATABASE() AS db").fetch
  return true if data[:db] == "mysql"
  return false
end

#optimize ⇒ Object 



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# File 'lib/baza/drivers/mysql/table.rb', line 39

def optimize
  @db.query("OPTIMIZE TABLE `#{@db.esc_table(self.name)}`")
  return self
end

#reload ⇒ Object 



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# File 'lib/baza/drivers/mysql/table.rb', line 16

def reload
  @data = @db.q("SHOW TABLE STATUS WHERE `Name` = '#{@db.esc(self.name)}'").fetch
end

#rename(newname) ⇒ Object 



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# File 'lib/baza/drivers/mysql/table.rb', line 220

def rename(newname)
  newname = newname.to_sym
  oldname = name

  @tables.__send__(:remove_from_list, self)
  @db.query("ALTER TABLE `#{@db.esc_table(oldname)}` RENAME TO `#{@db.esc_table(newname)}`")

  @data[:Name] = newname
  @name = newname
  @tables.__send__(:add_to_list, self)

  @list.each do |name, column|
    column.args[:table_name] = newname
  end

  @indexes_list.each do |name, index|
    index.args[:table_name] = newname
  end
end

#rows_count ⇒ Object 



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# File 'lib/baza/drivers/mysql/table.rb', line 44

def rows_count
  return @db.q("SELECT COUNT(*) AS count FROM `#{@db.esc_table(self.name)}`").fetch[:count].to_i
end

#truncate ⇒ Object 



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# File 'lib/baza/drivers/mysql/table.rb', line 240

def truncate
  @db.query("TRUNCATE `#{@db.esc_table(self.name)}`")
  return self
end