Class: Table

Inherits:
Object show all
Extended by:
RDL::Annotate
Defined in:
lib/types/sequel/comp_types.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods included from RDL::Annotate

attr_accessor_type, attr_reader_type, attr_writer_type, post, pre, rdl_alias, readd_comp_types, type, type_params, var_type

Class Method Details

.all_output(trec) ⇒ Object 



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# File 'lib/types/sequel/comp_types.rb', line 262

def self.all_output(trec)
  f = first_output(trec)
  if f.is_a?(RDL::Type::FiniteHashType)
    trp0 = RDL.type_cast(RDL.type_cast(trec, "RDL::Type::GenericType").params[0], "RDL::Type::FiniteHashType", force: true)
    selected = trp0.elts[:__selected]
    all_joined = get_all_joined(trp0.elts[:__all_joined])
    if !(selected == RDL::Globals.types[:nil])
      ## something is selected
      sel_arr = RDL.type_cast(selected.is_a?(RDL::Type::UnionType) ? RDL.type_cast(selected, "RDL::Type::UnionType").types : [selected], "Array<RDL::Type::SingletonType<Symbol>>", force: true)
      new_hash = Hash[sel_arr.map { |sel|
        if sel.val.to_s.include?("__")
          t = check_qual_column(sel.val, all_joined)
          _, col_name = sel.val.to_s.split "__"
          col_name = col_name.to_sym
          [col_name, t]
        else
          raise "no selected column found" unless (t = RDL.type_cast(f, "RDL::Type::FiniteHashType", force: true).elts[sel.val])
          [sel.val, t]
        end
      }]
      new_hash_type = RDL::Type::FiniteHashType.new(RDL.type_cast(new_hash, "Hash<%any, RDL::Type::Type>", force: true), nil)
      return RDL::Type::GenericType.new(RDL::Globals.types[:array], new_hash_type)
    else
      return RDL::Type::GenericType.new(RDL::Globals.types[:array], f)
    end
  else
    return RDL::Type::GenericType.new(RDL::Globals.types[:array], f)
  end
end

.check_qual_column(column_name, all_joined, type = nil) ⇒ Object

+ column_name +

if a symbol or SeqQualIdent Generic type of the qualified column name, e.g. :person__age

+ all_joined +

is an array of symbols of joined tables (must check if qualifying table is a member)

+ type +

is optional RDL type. If given, we check that it matches the type of the column in the schema.

returns type of given column

Raises:



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# File 'lib/types/sequel/comp_types.rb', line 484

def self.check_qual_column(column_name, all_joined, type=nil)
  case column_name
  when RDL::Type::GenericType
    cn = RDL.type_cast(column_name, "RDL::Type::GenericType", force: true)
    raise "Expected qualified column type." unless cn.base.name == "SeqQualIdent"
    qual_table, qual_column = cn.params.map { |t| RDL.type_cast(t, "RDL::Type::SingletonType<Symbol>", force: true).val }
  else
    ## symbol with name including underscores
    qual_table, qual_column = RDL.type_cast(column_name, "Symbol", force: true).to_s.split "__"
    qual_table = if qual_table.start_with?(":") then qual_table[1..-1].to_sym else qual_table.to_sym end
    qual_column = qual_column.to_sym
  end
  raise RDL::Typecheck::StaticTypeError, "qualified table #{qual_table} is not joined in receiver table, cannot reference its columns" unless all_joined.include?(qual_table)
  qual_table_schema = get_schema(RDL::Globals.seq_db_schema[qual_table].elts)
  raise RDL::Typecheck::StaticTypeError, "No column #{qual_column} in table #{qual_table}." if qual_table_schema[qual_column].nil?
  if type
    types = (if type.is_a?(RDL::Type::UnionType) then RDL.type_cast(type, "RDL::Type::UnionType", force: true).types else [type] end)
    types.each { |t|
      t = RDL.type_cast(t, "RDL::Type::GenericType", force: true).params[0] if t.is_a?(RDL::Type::GenericType) && (RDL.type_cast(t, "RDL::Type::GenericType", force: true).base == RDL::Globals.types[:array]) ## only happens if meth is where, don't need to check
      raise RDL::Typecheck::StaticTypeError, "Incompatible column types. Given #{t} but expected #{qual_table_schema[qual_column]} for column #{column_name}." unless RDL::Type::Type.leq(t, qual_table_schema[qual_column])
    }
  end
  return qual_table_schema[qual_column]
end

.first_output(trec) ⇒ Object 



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# File 'lib/types/sequel/comp_types.rb', line 373

def self.first_output(trec)
  case trec
  when RDL::Type::GenericType
    raise RDL::Typecheck::StaticTypeError, 'unexpected type' unless trec.base.name == "Table"
    receiver_param = RDL.type_cast(trec.params[0], "RDL::Type::FiniteHashType", force: true).elts
    if !(receiver_param[:__orm] == RDL::Globals.types[:false])
      receiver_param[:__orm]
    else
      RDL::Type::FiniteHashType.new(get_schema(receiver_param), nil)
    end
  else
    raise 'unexpected type #{trec}'
  end
end

.get_all_joined(t) ⇒ Object 



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# File 'lib/types/sequel/comp_types.rb', line 127

def self.get_all_joined(t)
  case t
  when RDL::Type::SingletonType
    sing = RDL.type_cast(t, "RDL::Type::SingletonType<Symbol>", force: true)
    raise "unexpected type #{t} in __all_joined clause" unless sing.val.is_a?(Symbol)
    return [sing.val]
  when RDL::Type::UnionType
    all = t.types.map { |subt|
      raise "unexpected type #{subt} in union type within __all_joined clause" unless subt.is_a?(RDL::Type::SingletonType) && RDL.type_cast(subt, "RDL::Type::SingletonType<Symbol>", force: true).val.is_a?(Symbol)
      RDL.type_cast(subt, "RDL::Type::SingletonType<Symbol>", force: true).val
    }
    return all
  when nil
    return RDL.type_cast([], "Array<Symbol>", force: true)
  else
    raise "unexpected type #{t} in __all_joined clause"
  end
end

.get_input(trec) ⇒ Object 



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# File 'lib/types/sequel/comp_types.rb', line 357

def self.get_input(trec)
  case trec
  when RDL::Type::GenericType
    sym_keys = get_schema(RDL.type_cast(trec.params[0], "RDL::Type::FiniteHashType", force: true).elts).keys
    RDL::Type::UnionType.new(*RDL.type_cast(sym_keys.map { |k| RDL::Type::SingletonType.new(k) }, "Array<RDL::Type::Type>"))
  else
    raise 'unexpected type #{trec}'
  end
end

.get_nominal_where_type(type) ⇒ Object 



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# File 'lib/types/sequel/comp_types.rb', line 417

def self.get_nominal_where_type(type)
  ## `where` can accept arrays/tuples and tables with a single column selected
  ## this method just extracts the parameter type
  case type
  when RDL::Type::GenericType
    if type.base == RDL::Globals.types[:array]
      type.params[0]
    elsif type.base == RDL::Type::NominalType.new(Table)
      schema = RDL.type_cast(type.params[0], "RDL::Type::FiniteHashType", force: true).elts
      sel = schema[:__selected]
      raise "Call to where expects table with a single column selected, got #{type}" unless sel.is_a?(RDL::Type::SingletonType)
      nominal = schema[RDL.type_cast(sel, "RDL::Type::SingletonType", force: true).val]
      raise "No type found for column #{sel} in call to `where`." unless nominal
      nominal
    else
      type
    end
  when RDL::Type::TupleType
    type = type.promote.params[0]
    raise "`where` passed tuple containing different types." if type.is_a?(RDL::Type::UnionType)
    type
  else
    type
  end
end

.get_output(trec, targs) ⇒ Object 



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# File 'lib/types/sequel/comp_types.rb', line 368

def self.get_output(trec, targs)
  RDL.type_cast(RDL.type_cast(trec, "RDL::Type::GenericType").params[0], "RDL::Type::FiniteHashType", force: true).elts[RDL.type_cast(targs[0], "RDL::Type::SingletonType<Symbol>", force: true).val]
end

.get_schema(hash) ⇒ Object 



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# File 'lib/types/sequel/comp_types.rb', line 122

def self.get_schema(hash)
  hash.select { |key, val| ![:__last_joined, :__all_joined, :__selected, :__orm].member?(key) }
end

.import_arg_type(trec, targs) ⇒ Object 



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# File 'lib/types/sequel/comp_types.rb', line 399

def self.import_arg_type(trec, targs)
  raise "Cannot import for joined table." if RDL.type_cast(RDL.type_cast(trec, "RDL::Type::GenericType").params[0], "RDL::Type::FiniteHashType", force: true).elts[:__all_joined].is_a?(RDL::Type::UnionType)
  raise "Expected tuple for first arg to `import`, got #{targs[0]} instead." unless targs[0].is_a?(RDL::Type::TupleType)
  arg1 = targs[1]
  case arg1
  when RDL::Type::TupleType
    arg1.params.each { |t| schema_arg_tuple_type(trec, [targs[0], t], :import) } ## check each individual tuple inside second arg tuple
  when RDL::Type::GenericType
    raise "expected Array, got #{arg1}" unless (arg1.base == RDL::Globals.types[:array])
    raise "`import` type not yet implemented for type #{arg1}" unless arg1.params[0].is_a?(RDL::Type::TupleType)
    schema_arg_tuple_type(trec, [targs[0], arg1.params[0]], :import)
  else
    raise "Not yet implemented for type #{arg1}."
  end
  return targs[0]
end

.insert_arg_type(trec, targs, tuple = false) ⇒ Object 



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# File 'lib/types/sequel/comp_types.rb', line 389

def self.insert_arg_type(trec, targs, tuple=false)
  raise "Cannot insert/update for joined table." if RDL.type_cast(RDL.type_cast(trec, "RDL::Type::GenericType").params[0], "RDL::Type::FiniteHashType", force: true).elts[:__all_joined].is_a?(RDL::Type::UnionType)
  if tuple
    schema_arg_tuple_type(trec, targs, :insert)
  else
    schema_arg_type(trec, targs, :insert)
  end
end

.join_ret_type(trec, targs) ⇒ Object

Raises:



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# File 'lib/types/sequel/comp_types.rb', line 147

def self.join_ret_type(trec, targs)
  raise RDL::Typecheck::StaticTypeError, "Unexpected number of arguments to `join`." unless targs.size == 2
  targ1, targ2 = *targs
  raise RDL::Typecheck::StaticTypeError, "Unexpected second argument type #{targ2} to `join`." unless targ2.is_a?(RDL::Type::FiniteHashType)
  arg_join_column = RDL.type_cast(RDL.type_cast(targ2, "RDL::Type::FiniteHashType").elts.keys[0], "Symbol", force: true) ## column name of arg table which is joined on
  rec_join_column = RDL.type_cast(RDL.type_cast(targ2, "RDL::Type::FiniteHashType").elts[arg_join_column], "Symbol", force: true) ## column name of receiver table which is joined on
  case trec
  when RDL::Type::GenericType
    raise RDL::Typecheck::StaticTypeError, "unexpceted generic type in call to join" unless trec.base.name == "Table"
    receiver_param = RDL.type_cast(trec.params[0], "RDL::Type::FiniteHashType", force: true).elts
    receiver_schema = get_schema(receiver_param)
    join_source_schema = get_schema(RDL::Globals.seq_db_schema[RDL.type_cast(receiver_param[:__last_joined], "RDL::Type::SingletonType<Symbol>", force: true).val].elts)
    rec_all_joined = get_all_joined(receiver_param[:__all_joined])

    case rec_join_column
    when RDL::Type::SingletonType
      ## given symbol for second column to join on
      if rec_join_column.to_s.include?("__")
        ## qualified column name in old versions of sequel.
        check_qual_column(rec_join_column, rec_all_joined)
      else
        raise RDL::Typecheck::StaticTypeError, "No column #{rec_join_column} for receiver in call to `join`." if join_source_schema[rec_join_column.val].nil?
      end
    when RDL::Type::GenericType
    ## given qualified column, e.g. Sequel[:people][:name]
      raise RDL::Typecheck::StaticTypeError, "unexpected generic type #{rec_join_column}" unless rec_join_column.base.name == "SeqQualIdent"
      qual_table, qual_column = rec_join_column.params.map { |t| t.val }
      raise RDL::Typecheck::StaticTypeError, "qualified table #{qual_table} is not joined in receiver table, and so its columns cannot be joined on" unless rec_all_joined.include?(qual_table)
      qual_table_schema = get_schema(RDL::Globals.seq_db_schema[qual_table].elts)
      raise RDL::Typecheck::StaticTypeError, "No column #{qual_column} in table #{qual_table}." if qual_table_schema[qual_column].nil?
    else
      raise "Unexpected column #{rec_join_column} to join on"
    end
    case targ1
    when RDL::Type::SingletonType
      val = RDL.type_cast(targ1.val, "Symbol", force: true)
      raise RDL::Typecheck::StaticTypeError, "Expected Symbol for first argument to `join`." unless val.is_a?(Symbol)
      table_name = val
      table_schema = RDL::Globals.seq_db_schema[table_name]
      raise "No schema found for table #{table_name}." unless table_schema
      arg_schema = get_schema(table_schema.elts)  ## look up table schema for argument
      raise RDL::Typecheck::StaticTypeError, "No column #{arg_join_column} for arg in call to `join`." if arg_schema[arg_join_column].nil?
      result_schema = receiver_schema.merge(arg_schema).merge({ __all_joined: RDL::Type::UnionType.new(*[receiver_param[:__all_joined], targ1]), __last_joined: targ1, __selected: receiver_param[:__selected], __orm: receiver_param[:__orm] })  ## resulting schema as hash
      result_fht = RDL::Type::FiniteHashType.new(result_schema, nil) ## resulting schema as FiniteHashType

      return RDL::Type::GenericType.new(trec.base, result_fht)
    when RDL::Type::NominalType
    ## TODO: this will catch case that first argument is a non-singleton Symbol
      raise "not implemented, likely not needed in practice"
    else
      raise RDL::Typecheck::StaticTypeError, "Unexpected type of first argument to `join`."
    end
  when RDL::Type::NominalType
    raise RDL::Typecheck::StaticTypeError unless trec.name == "Table"
  else
    raise RDL::Typecheck::StaticTypeError, "Unexpected receiver type in call to `join`."
  end
end

.map_block_input(trec) ⇒ Object 



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# File 'lib/types/sequel/comp_types.rb', line 256

def self.map_block_input(trec)
  schema = get_schema(RDL.type_cast(trec.params[0], "RDL::Type::FiniteHashType", force: true).elts)
  RDL::Type::FiniteHashType.new(schema, nil)
end

.order_input(trec, targs) ⇒ Object 



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# File 'lib/types/sequel/comp_types.rb', line 234

def self.order_input(trec, targs)
  case trec
  when RDL::Type::GenericType
    trp0 = RDL.type_cast(trec.params[0], "RDL::Type::FiniteHashType", force: true)
    sym_keys = get_schema(trp0.elts).keys
    all_joined = get_all_joined(trp0.elts[:__all_joined])
    targs.each { |a|
      case a
      when RDL::Type::SingletonType
        return RDL::Globals.types[:bot] unless sym_keys.include?(a.val)
      when RDL::Type::GenericType
        return RDL::Globals.types[:bot] unless a.base.name == "SeqQualIdent"
        check_qual_column(a, all_joined)
      end
    }
    return RDL::Type::VarargType.new(RDL::Type::UnionType.new(*targs))
  else
    raise "unexpected type #{trec}"
  end
end

.schema_arg_tuple_type(trec, targs, meth) ⇒ Object 



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# File 'lib/types/sequel/comp_types.rb', line 510

def self.schema_arg_tuple_type(trec, targs, meth)
  return RDL::Type::NominalType.new(Array) if targs.size != 2
  case trec
  when RDL::Type::GenericType
    raise RDL::Typecheck::StaticTypeError, 'unexpected type' unless trec.base.name == "Table"
    receiver_param = RDL.type_cast(trec.params[0], "RDL::Type::FiniteHashType", force: true).elts
    all_joined = get_all_joined(receiver_param[:__all_joined])
    receiver_schema = get_schema(receiver_param)
    if targs[0].is_a?(RDL::Type::TupleType) && targs[1].is_a?(RDL::Type::TupleType)
      RDL.type_cast(targs[0], "RDL::Type::TupleType", force: true).params.each_with_index { |column_name, i|
        cn = RDL.type_cast(column_name, "RDL::Type::SingletonType<Symbol>", force: true)
        raise "Expected singleton symbol in call to insert, got #{column_name}" unless cn.is_a?(RDL::Type::SingletonType) && cn.val.is_a?(Symbol)
        type = RDL.type_cast(targs[1], "RDL::Type::TupleType", force: true).params[i]
        if cn.val.to_s.include?("__") && (meth == :where)
          check_qual_column(cn.val, all_joined, type)
        else
          raise RDL::Typecheck::StaticTypeError, "No column #{column_name} for receiver in call to `insert`." unless receiver_schema.has_key?(cn.val)
          type = get_nominal_where_type(type) if (meth == :where)
          raise RDL::Typecheck::StaticTypeError, "Incompatible column types." unless RDL::Type::Type.leq(type, receiver_schema[cn.val])
        end
      }
      return targs[0]
    else
      raise "not yet implemented for types #{targs[0]} and #{targs[1]}"
    end
  else
    raise 'not yet implemented'
  end
end

.schema_arg_type(trec, targs, meth) ⇒ Object 



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# File 'lib/types/sequel/comp_types.rb', line 445

def self.schema_arg_type(trec, targs, meth)
  return RDL::Type::NominalType.new(Hash) if targs.size != 1
  case trec
  when RDL::Type::GenericType
    raise RDL::Typecheck::StaticTypeError, 'unexpected type' unless trec.base.name == "Table"
    receiver_param = RDL.type_cast(trec.params[0], "RDL::Type::FiniteHashType", force: true).elts
    receiver_schema = get_schema(receiver_param)
    all_joined = get_all_joined(receiver_param[:__all_joined])
    arg0 = targs[0]
    case arg0
    when RDL::Type::FiniteHashType
      insert_hash = arg0.elts
      insert_hash.each { |column_name, type|
        cn = RDL.type_cast(column_name, "Symbol", force: true)
        if cn.to_s.include?("__") && (meth == :where)
          check_qual_column(cn, all_joined, type)
        else
          raise RDL::Typecheck::StaticTypeError, "No column #{column_name} for receiver #{trec}." unless receiver_schema.has_key?(cn)
          type = get_nominal_where_type(type) if (meth == :where)
          raise RDL::Typecheck::StaticTypeError, "Incompatible column types #{type} and #{receiver_schema[column_name]} for column #{cn} in call to #{meth}." unless RDL::Type::Type.leq(type, receiver_schema[cn])
        end
      }
      return arg0
    else
      return arg0 if (meth==:where) && targs[0] <= RDL::Globals.types[:string]
      raise "TODO WITH #{trec} AND #{targs} AND #{meth}"
    end
  when RDL::Type::NominalType
  ##TODO
  else

  end
end

.select_map_output(trec, targs, meth) ⇒ Object 



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# File 'lib/types/sequel/comp_types.rb', line 293

def self.select_map_output(trec, targs, meth)
  case trec
  when RDL::Type::GenericType
    raise RDL::Typecheck::StaticTypeError, 'unexpected type' unless trec.base.name == "Table"
    receiver_param = RDL.type_cast(trec.params[0], "RDL::Type::FiniteHashType", force: true).elts
    all_joined = get_all_joined(receiver_param[:__all_joined])

    map_types = targs.map { |arg|
      case arg
      when RDL::Type::SingletonType
        column = RDL.type_cast(arg.val, "Symbol", force: true)
        raise "unexpected arg type #{arg}" unless column.is_a?(Symbol)
        raise "Ambiguous column identifier #{arg}." unless unique_ids?([column], receiver_param[:__all_joined])
        if column.to_s.include?("__")
          check_qual_column(column, all_joined)
        else
          raise "No column #{column} in receiver table." unless receiver_param[column]
          receiver_param[column]
        end
      when RDL::Type::GenericType
        raise "unexpected arg type #{arg}" unless arg.base.name == "SeqQualIdent"
        check_qual_column(arg, all_joined)
      else
        raise "unexpected arg type #{arg}"
      end
    }

    targs.each { |arg|
      case arg
      when RDL::Type::SingletonType
        column = RDL.type_cast(arg.val, "Symbol", force: true)
        raise "unexpected arg type #{arg}" unless column.is_a?(Symbol)
        raise "Ambiguous column identifier #{arg}." unless unique_ids?([column], receiver_param[:__all_joined])
        if column.to_s.include?("__")
          map_types = map_types + [check_qual_column(column, all_joined)]
        else
          raise "No column #{column} in receiver table." unless receiver_param[column]
          map_types = map_types + [receiver_param[column]]
        end
      when RDL::Type::GenericType
        raise "unexpected arg type #{arg}" unless arg.base.name == "SeqQualIdent"
        map_types = map_types + [check_qual_column(arg, all_joined)]
      else
        raise "unexpected arg type #{arg}"
      end
    }
    if meth == :select
      result_schema = receiver_param.clone.merge({ __selected: RDL::Type::UnionType.new(*targs).canonical })
      return RDL::Type::GenericType.new(trec.base, RDL::Type::FiniteHashType.new(result_schema, nil))
    elsif meth == :select_map
      if targs.size >1
        return RDL::Type::GenericType.new(RDL::Globals.types[:array], RDL::Type::TupleType.new(*map_types))
      else
        return RDL::Type::GenericType.new(RDL::Globals.types[:array], map_types[0])
      end
    else
      raise 'unexpected'
    end
  else
    raise 'unexpected type #{trec}'
  end
end

.unique_ids?(ids, joined) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/types/sequel/comp_types.rb', line 563

def self.unique_ids?(ids, joined)
  j = get_all_joined(joined)
  count = Hash[ids.map { |id| [id, 0] }]

  j.each { |t1|
    schema1 = RDL::Globals.seq_db_schema[t1]
    raise "schema not found" unless schema1
    j.each { |t2|
      schema2 = RDL::Globals.seq_db_schema[t2]
      ids.each { |id|
        return false if schema1.elts.has_key?(id) && schema2.elts.has_key?(id) && (t1 != t2)
      }
    }
  }
  return true
end

.where_arg_type(trec, targs, tuple = false) ⇒ Object 



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# File 'lib/types/sequel/comp_types.rb', line 541

def self.where_arg_type(trec, targs, tuple=false)
  trp0 = RDL.type_cast(RDL.type_cast(trec, "RDL::Type::GenericType").params[0], "RDL::Type::FiniteHashType", force: true)
  if trp0.elts[:__all_joined].is_a?(RDL::Type::UnionType)
    arg0 = targs[0]
    case arg0
    when RDL::Type::TupleType
      raise "Unexpected column type." unless arg0.params.all? { |t| t.is_a?(RDL::Type::SingletonType) && RDL.type_cast(t, "RDL::Type::SingletonType<Object>", force: true).val.is_a?(Symbol) }
      raise "Ambigious identifier in call to where." unless unique_ids?(arg0.params.map { |t| RDL.type_cast(t, "RDL::Type::SingletonType<Symbol>", force: true).val }, trp0.elts[:__all_joined])
    when RDL::Type::FiniteHashType
      raise "Ambigious identifier in call to where." unless unique_ids?(RDL.type_cast(arg0.elts.keys, "Array<Symbol>", force: true), trp0.elts[:__all_joined])
    else
      raise "unexpected arg type #{arg0}"
    end
  end
  if tuple
    schema_arg_tuple_type(trec, targs, :where)
  else
    schema_arg_type(trec, targs, :where)
  end
end

Instance Method Details

#Sequel ⇒ Object

args will ultimately be checked by ‘order`



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# File 'lib/types/sequel/comp_types.rb', line 219

type Sequel, 'self.desc', '(%any) -> ``targs[0]``', wrap: false