Class: RDBI::Driver::MySQL::Statement

Inherits:
Statement
  • Object
show all
Extended by:
MethLab
Defined in:
lib/rdbi/driver/mysql.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(query, dbh) ⇒ Statement

Returns a new instance of Statement.



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# File 'lib/rdbi/driver/mysql.rb', line 365

def initialize(query, dbh)
  super(query, dbh)

  ep = Epoxy.new(query)
  @index_map = ep.indexed_binds

  # FIXME straight c'n'p from postgres, not sure it's needed.
  query = ep.quote(@index_map.compact.inject({}) { |x,y| x.merge({ y => nil }) }) { |x| '?' }

  @my_query = dbh.my_conn.prepare(query)
  # FIXME type maps
  @output_type_map = RDBI::Type.create_type_hash( RDBI::Type::Out )

  manipulate_type_maps

  prep_finalizer { @my_query.close rescue nil }
end

Instance Attribute Details

#my_query ⇒ Object (readonly)

Returns the value of attribute my_query.



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# File 'lib/rdbi/driver/mysql.rb', line 363

def my_query
  @my_query
end

Instance Method Details

#new_execution(*binds) ⇒ Object 



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# File 'lib/rdbi/driver/mysql.rb', line 398

def new_execution(*binds)
  # FIXME move to RDBI::Util or something.
  hashes, binds = binds.partition { |x| x.kind_of?(Hash) }
  hash = hashes.inject({}) { |x, y| x.merge(y) }
  hash.keys.each do |key| 
    if index = @index_map.index(key)
      binds.insert(index, hash[key])
    end
  end

  res = @my_query.execute(*binds)

  columns = []
  metadata = res.result_metadata rescue nil

  if metadata
    columns = res.result_metadata.fetch_fields.collect do |col|
      RDBI::Column.new(
        col.name.to_sym,
        map_type(col),
        map_type(col).to_sym,
        col.length,
        col.decimals,
        !col.is_not_null?
      )
    end
  end

  schema = RDBI::Schema.new columns
  [ Cursor.new(res), schema, @output_type_map ]
end

#new_modification(*binds) ⇒ Object 



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# File 'lib/rdbi/driver/mysql.rb', line 383

def new_modification(*binds)
  # FIXME move to RDBI::Util or something.
  hashes, binds = binds.partition { |x| x.kind_of?(Hash) }
  hash = hashes.inject({}) { |x, y| x.merge(y) }
  hash.keys.each do |key| 
    if index = @index_map.index(key)
      binds.insert(index, hash[key])
    end
  end

  res = @my_query.execute(*binds)

  return res.affected_rows
end