Class: Flydata::TableDef::MysqlTableDef

Inherits:
Object
  • Object
show all
Defined in:
lib/flydata/table_def/mysql_table_def.rb

Constant Summary collapse

TYPE_MAP_M2F = 
{
  'bigint' => 'int8',
  'binary' => 'binary',
  'blob' => 'varbinary',
  'bool' => 'int1',
  'boolean' => 'int1',
  'char' => 'varchar',
  'date' => 'date',
  'datetime' => 'datetime',
  'dec' => 'numeric',
  'decimal' => 'numeric',
  'double' => 'float8',
  'double precision' => 'float8',
  'enum' => 'enum',
  'fixed' => 'numeric',
  'float' => 'float4',
  'int' => 'int4',
  'longblob' => 'varbinary',
  'longtext' => 'text',
  'mediumblob' => 'varbinary',
  'mediumint' => 'int3',
  'mediumtext' => 'text',
  'numeric' => 'numeric',
  'smallint' => 'int2',
  'text' => 'text',
  'time' => 'time',
  'timestamp' => 'datetime',
  'tinyblob' => 'varbinary',
  'tinyint' => 'int1',
  'tinytext' => 'text',
  'varbinary' => 'varbinary',
  'varchar' => 'varchar',
}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(table_def, table_name, columns, default_charset, comment) ⇒ MysqlTableDef

Returns a new instance of MysqlTableDef.



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# File 'lib/flydata/table_def/mysql_table_def.rb', line 44

def initialize(table_def, table_name, columns, default_charset, comment)
  @table_def = table_def
  @table_name = table_name
  @columns = columns
  @default_charset = default_charset
  @comment = comment
end

Instance Attribute Details

#columns ⇒ Object (readonly)

Returns the value of attribute columns.



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# File 'lib/flydata/table_def/mysql_table_def.rb', line 103

def columns
  @columns
end

#table_name ⇒ Object (readonly)

Returns the value of attribute table_name.



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# File 'lib/flydata/table_def/mysql_table_def.rb', line 103

def table_name
  @table_name
end

Class Method Details

._create(io) ⇒ Object 



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# File 'lib/flydata/table_def/mysql_table_def.rb', line 52

def self._create(io)
  table_def = ''
  table_name = nil
  columns = []
  default_charset = nil
  comment = nil

  position = :before_create_table

  io.each_line do |line|
    case position
    when :before_create_table
      if line =~ /CREATE TABLE `(.*?)`/
        position = :in_create_table
        table_name = $1
        table_def += line.chomp
        next
      end

    when :in_create_table
      table_def += line.chomp

      stripped_line = line.strip
      # `col_smallint` smallint(6) DEFAULT NULL,
      if stripped_line.start_with?('`')
        columns << parse_column_line(line)
      # PRIMARY KEY (`id`)
      elsif stripped_line.start_with?("PRIMARY KEY")
        parse_primary_key(line, columns)
      #) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='test table';
      elsif stripped_line.start_with?(')')
        default_charset = $1 if line =~ /DEFAULT CHARSET\s*=\s*([^\s]+)/
        comment = $1 if /COMMENT='((?:\\'|[^'])*)'/.match(line)
        position = :after_create_table
      elsif stripped_line.start_with?("KEY")
        # index creation.  No action required.
      elsif stripped_line.start_with?("CONSTRAINT")
        # constraint definition.  No acction required.
      else
        $stderr.puts "Unknown table definition. Skip. (#{line})"
      end

    when :after_create_table
      unless columns.any? {|column| column[:primary_key]}
        raise "Primary key must be defined."
      end
      break
    end
  end
  position == :after_create_table ? [table_def, table_name, columns, default_charset, comment] : nil
end

.create(io) ⇒ Object 



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# File 'lib/flydata/table_def/mysql_table_def.rb', line 39

def self.create(io)
  params = _create(io)
  params ? self.new(*params) : nil
end

Instance Method Details

#to_flydata_tabledef ⇒ Object 



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# File 'lib/flydata/table_def/mysql_table_def.rb', line 105

def to_flydata_tabledef
  tabledef = { table_name: @table_name,
               columns: @columns,
             }
  tabledef[:default_charset] = @default_charset if @default_charset
  tabledef[:comment] = @comment if @comment

  tabledef
end