Module: PLSQL::ProcedureCommon

Included in:
Procedure, Type::TypeProcedure
Defined in:
lib/plsql/procedure.rb

Overview

:nodoc:

Constant Summary collapse

PLSQL_COMPOSITE_TYPES = 
["PL/SQL RECORD", "PL/SQL TABLE", "TABLE", "VARRAY", "REF CURSOR"].freeze
PLSQL_COLLECTION_TYPES = 
["PL/SQL TABLE", "TABLE", "VARRAY"].freeze

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#argument_list ⇒ Object (readonly)

Returns the value of attribute argument_list.



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# File 'lib/plsql/procedure.rb', line 57

def argument_list
  @argument_list
end

#arguments ⇒ Object (readonly)

Returns the value of attribute arguments.



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# File 'lib/plsql/procedure.rb', line 57

def arguments
  @arguments
end

#out_list ⇒ Object (readonly)

Returns the value of attribute out_list.



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# File 'lib/plsql/procedure.rb', line 57

def out_list
  @out_list
end

#package ⇒ Object (readonly)

Returns the value of attribute package.



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# File 'lib/plsql/procedure.rb', line 58

def package
  @package
end

#procedure ⇒ Object (readonly)

Returns the value of attribute procedure.



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# File 'lib/plsql/procedure.rb', line 58

def procedure
  @procedure
end

#return ⇒ Object (readonly)

Returns the value of attribute return.



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# File 'lib/plsql/procedure.rb', line 57

def return
  @return
end

#schema ⇒ Object (readonly)

Returns the value of attribute schema.



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# File 'lib/plsql/procedure.rb', line 58

def schema
  @schema
end

#schema_name ⇒ Object (readonly)

Returns the value of attribute schema_name.



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# File 'lib/plsql/procedure.rb', line 58

def schema_name
  @schema_name
end

Class Method Details

.type_to_sql(metadata) ⇒ Object

return type string from metadata that can be used in DECLARE block or table definition



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# File 'lib/plsql/procedure.rb', line 61

def self.type_to_sql(metadata) #:nodoc:
  case metadata[:data_type]
  when "NUMBER"
    precision, scale = metadata[:data_precision], metadata[:data_scale]
    "NUMBER#{precision ? "(#{precision}#{scale ? ",#{scale}" : ""})" : ""}"
  when "VARCHAR", "VARCHAR2", "CHAR"
    length = case metadata[:char_used]
             when "C" then "#{metadata[:char_length]} CHAR"
             when "B" then "#{metadata[:data_length]} BYTE"
             else
               metadata[:data_length]
    end
    "#{metadata[:data_type]}#{length && "(#{length})"}"
  when "NVARCHAR2", "NCHAR"
    length = metadata[:char_length]
    "#{metadata[:data_type]}#{length && "(#{length})"}"
  when "PL/SQL TABLE", "TABLE", "VARRAY", "OBJECT", "XMLTYPE"
    metadata[:sql_type_name]
  else
    metadata[:data_type]
  end
end

Instance Method Details

#build_sql_type_name(type_owner, type_package, type_name) ⇒ Object

:nodoc:



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# File 'lib/plsql/procedure.rb', line 333

def build_sql_type_name(type_owner, type_package, type_name) #:nodoc:
  if type_owner == nil || type_owner == "PUBLIC"
    type_owner_res = ""
  else
    type_owner_res = "#{type_owner}."
  end

  if type_package == nil
    type_name_res = type_name
  else
    type_name_res = "#{type_package}.#{type_name}"
  end
  type_name_res && "#{type_owner_res}#{type_name_res}"
end

#collection_type?(data_type) ⇒ Boolean

:nodoc:

Returns:

  • (Boolean) 


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# File 'lib/plsql/procedure.rb', line 518

def collection_type?(data_type) #:nodoc:
  PLSQL_COLLECTION_TYPES.include? data_type
end

#composite_type?(data_type) ⇒ Boolean

:nodoc:

Returns:

  • (Boolean) 


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# File 'lib/plsql/procedure.rb', line 513

def composite_type?(data_type) #:nodoc:
  PLSQL_COMPOSITE_TYPES.include? data_type
end

#construct_argument_list_for_overloads ⇒ Object

:nodoc:



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# File 'lib/plsql/procedure.rb', line 301

def construct_argument_list_for_overloads #:nodoc:
  @overloads = @arguments.keys.sort
  @overloads.each do |overload|
    @argument_list[overload] = @arguments[overload].keys.sort { |k1, k2| @arguments[overload][k1][:position] <=> @arguments[overload][k2][:position] }
    @out_list[overload] = @argument_list[overload].select { |k| @arguments[overload][k][:in_out] =~ /OUT/ }
  end
end

#ensure_tmp_tables_created(overload) ⇒ Object

:nodoc:



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# File 'lib/plsql/procedure.rb', line 309

def ensure_tmp_tables_created(overload) #:nodoc:
  return if @tmp_tables_created.nil? || @tmp_tables_created[overload]
  @tmp_table_names[overload] && @tmp_table_names[overload].each do |table_name, argument_metadata|
    sql = "CREATE GLOBAL TEMPORARY TABLE #{table_name} (\n"
    element_metadata = argument_metadata[:element]
    case element_metadata[:data_type]
    when "PL/SQL RECORD"
      fields_metadata = element_metadata[:fields]
      fields_sorted_by_position = fields_metadata.keys.sort_by { |k| fields_metadata[k][:position] }
      sql << fields_sorted_by_position.map do |field|
        metadata = fields_metadata[field]
        "#{field} #{ProcedureCommon.type_to_sql(metadata)}"
      end.join(",\n")
    else
      sql << "element #{ProcedureCommon.type_to_sql(element_metadata)}"
    end
    sql << ",\ni__ NUMBER(38)\n"
    sql << ") ON COMMIT PRESERVE ROWS\n"
    sql_block = "DECLARE\nPRAGMA AUTONOMOUS_TRANSACTION;\nBEGIN\nEXECUTE IMMEDIATE :sql;\nEND;\n"
    @schema.execute sql_block, sql
  end
  @tmp_tables_created[overload] = true
end

#get_argument_metadata ⇒ Object

get procedure argument metadata from data dictionary



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# File 'lib/plsql/procedure.rb', line 85

def get_argument_metadata #:nodoc:
  if (@schema.connection.database_version <=> [18, 0, 0, 0]) >= 0
    get_argument_metadata_from_18c
  else
    get_argument_metadata_below_18c
  end
end

#get_argument_metadata_below_18c ⇒ Object

:nodoc:



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# File 'lib/plsql/procedure.rb', line 93

def get_argument_metadata_below_18c #:nodoc:
  @arguments = {}
  @argument_list = {}
  @out_list = {}
  @return = {}
  @overloaded = false

  # store reference to previous level record or collection metadata
  previous_level_argument_metadata = {}

  # store tmp tables for each overload for table parameters with types defined inside packages
  @tmp_table_names = {}
  # store if tmp tables are created for specific overload
  @tmp_tables_created = {}

  # subprogram_id column is available just from version 10g
  subprogram_id_column = (@schema.connection.database_version <=> [10, 2, 0, 2]) >= 0 ? "subprogram_id" : "NULL"
  # defaulted is available just from version 11g
  defaulted_column = (@schema.connection.database_version <=> [11, 0, 0, 0]) >= 0 ? "defaulted" : "NULL"

  @schema.select_all(
    "SELECT #{subprogram_id_column}, object_name, TO_NUMBER(overload), argument_name, position, data_level,
          data_type, in_out, data_length, data_precision, data_scale, char_used,
          char_length, type_owner, type_name, type_subname, #{defaulted_column}
    FROM all_arguments
    WHERE object_id = :object_id
    AND owner = :owner
    AND object_name = :procedure_name
    ORDER BY overload, sequence",
    @object_id, @schema_name, @procedure
  ) do |r|

    subprogram_id, object_name, overload, argument_name, position, data_level,
        data_type, in_out, data_length, data_precision, data_scale, char_used,
        char_length, type_owner, type_name, type_subname, defaulted = r

    @overloaded ||= !overload.nil?
    # if not overloaded then store arguments at key 0
    overload ||= 0
    @arguments[overload] ||= {}
    @return[overload] ||= nil
    @tmp_table_names[overload] ||= []

    sql_type_name = type_owner && "#{type_owner == 'PUBLIC' ? nil : "#{type_owner}."}#{type_name}#{type_subname ? ".#{type_subname}" : nil}"

    tmp_table_name = nil
    # type defined inside package
    if type_subname
      if collection_type?(data_type)
        raise ArgumentError, "#{data_type} type #{sql_type_name} definition inside package is not supported as part of other type definition," <<
          " use CREATE TYPE outside package" if data_level > 0
        # if subprogram_id was not supported by all_arguments view
        # then generate unique ID from object_name and overload
        subprogram_id ||= "#{object_name.hash % 10000}#{overload}"
        tmp_table_name = "#{Connection::RUBY_TEMP_TABLE_PREFIX}#{@schema.connection.session_id}_#{@object_id}_#{subprogram_id}_#{position}"
      elsif data_type != "PL/SQL RECORD"
        # raise exception only when there are no overloaded procedure definitions
        # (as probably this overload will not be used at all)
        raise ArgumentError, "Parameter type #{sql_type_name} definition inside package is not supported, use CREATE TYPE outside package" if overload == 0
      end
    end

    argument_metadata = {
      position: position && position.to_i,
      data_type: data_type,
      in_out: in_out,
      data_length: data_length && data_length.to_i,
      data_precision: data_precision && data_precision.to_i,
      data_scale: data_scale && data_scale.to_i,
      char_used: char_used,
      char_length: char_length && char_length.to_i,
      type_owner: type_owner,
      type_name: type_name,
      type_subname: type_subname,
      sql_type_name: sql_type_name,
      defaulted: defaulted
    }
    if tmp_table_name
      @tmp_table_names[overload] << [(argument_metadata[:tmp_table_name] = tmp_table_name), argument_metadata]
    end

    if composite_type?(data_type)
      case data_type
      when "PL/SQL RECORD"
        argument_metadata[:fields] = {}
      end
      previous_level_argument_metadata[data_level] = argument_metadata
    end

    # if function has return value
    if argument_name.nil? && data_level == 0 && in_out == "OUT"
      @return[overload] = argument_metadata
    # if parameter
    else
      # top level parameter
      if data_level == 0
        # sometime there are empty IN arguments in all_arguments view for procedures without arguments (e.g. for DBMS_OUTPUT.DISABLE)
        @arguments[overload][argument_name.downcase.to_sym] = argument_metadata if argument_name
      # or lower level part of composite type
      else
        case previous_level_argument_metadata[data_level - 1][:data_type]
        when "PL/SQL RECORD"
          previous_level_argument_metadata[data_level - 1][:fields][argument_name.downcase.to_sym] = argument_metadata
        when "PL/SQL TABLE", "TABLE", "VARRAY", "REF CURSOR"
          previous_level_argument_metadata[data_level - 1][:element] = argument_metadata
        end
      end
    end
  end
  # if procedure is without arguments then create default empty argument list for default overload
  @arguments[0] = {} if @arguments.keys.empty?

  construct_argument_list_for_overloads
end

#get_argument_metadata_from_18c ⇒ Object

get procedure argument metadata from data dictionary



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# File 'lib/plsql/procedure.rb', line 209

def get_argument_metadata_from_18c #:nodoc:
  @arguments = {}
  @argument_list = {}
  @out_list = {}
  @return = {}
  @overloaded = false

  # store tmp tables for each overload for table parameters with types defined inside packages
  @tmp_table_names = {}
  # store if tmp tables are created for specific overload
  @tmp_tables_created = {}

  @schema.select_all(
    "SELECT subprogram_id, object_name, TO_NUMBER(overload), argument_name, position,
          data_type, in_out, data_length, data_precision, data_scale, char_used,
          char_length, type_owner, nvl(type_subname, type_name),
          decode(type_object_type, 'PACKAGE', type_name, null), type_object_type, defaulted
    FROM all_arguments
    WHERE object_id = :object_id
    AND owner = :owner
    AND object_name = :procedure_name
    ORDER BY overload, sequence",
    @object_id, @schema_name, @procedure
  ) do |r|

    subprogram_id, object_name, overload, argument_name, position,
      data_type, in_out, data_length, data_precision, data_scale, char_used,
      char_length, type_owner, type_name, type_package, type_object_type, defaulted = r

    @overloaded ||= !overload.nil?
    # if not overloaded then store arguments at key 0
    overload ||= 0
    @arguments[overload] ||= {}
    @return[overload] ||= nil
    @tmp_table_names[overload] ||= []

    sql_type_name = build_sql_type_name(type_owner, type_package, type_name)

    tmp_table_name = nil
    # type defined inside package
    if type_package
      if collection_type?(data_type)
        tmp_table_name = "#{Connection::RUBY_TEMP_TABLE_PREFIX}#{@schema.connection.session_id}_#{@object_id}_#{subprogram_id}_#{position}"
      end
    end

    argument_metadata = {
      position: position && position.to_i,
      data_type: data_type,
      in_out: in_out,
      data_length: data_length && data_length.to_i,
      data_precision: data_precision && data_precision.to_i,
      data_scale: data_scale && data_scale.to_i,
      char_used: char_used,
      char_length: char_length && char_length.to_i,
      type_owner: type_owner,
      type_name: type_name,
      # TODO: should be renamed to type_package, when support for legacy database versions is dropped
      # due to the explicit change declaration of types in oracle plsql_type-catalogs (type_package + type_name),
      # the assignment of type + subtype was switched here for 18c and beyond
      type_subname: type_package,
      sql_type_name: sql_type_name,
      defaulted: defaulted,
      type_object_type: type_object_type
    }
    if tmp_table_name
      @tmp_table_names[overload] << [(argument_metadata[:tmp_table_name] = tmp_table_name), argument_metadata]
    end

    if composite_type?(data_type)
      case data_type
      when "PL/SQL RECORD", "REF CURSOR"
        argument_metadata[:fields] = get_field_definitions(argument_metadata)
      when "PL/SQL TABLE", "TABLE", "VARRAY"
        argument_metadata[:element] = get_element_definition(argument_metadata)
      end
    end

    # if function has return value
    if argument_name.nil? && in_out == "OUT"
      @return[overload] = argument_metadata
    else
      # sometime there are empty IN arguments in all_arguments view for procedures without arguments (e.g. for DBMS_OUTPUT.DISABLE)
      @arguments[overload][argument_name.downcase.to_sym] = argument_metadata if argument_name
    end
  end
  # if procedure is without arguments then create default empty argument list for default overload
  @arguments[0] = {} if @arguments.keys.empty?

  construct_argument_list_for_overloads
end

#get_composite_type(type_owner, type_name, type_package) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/plsql/procedure.rb', line 501

def get_composite_type(type_owner, type_name, type_package)
  r = @schema.select_first("SELECT typecode FROM all_plsql_types WHERE owner = :owner AND type_name = :type_name AND package_name = :type_package
                            UNION ALL
                            SELECT typecode FROM all_types WHERE owner = :owner AND type_name = :type_name",
                            type_owner, type_name, type_package, type_owner, type_name)
  typecode = r[0]
  raise ArgumentError, "#{type_name} type #{build_sql_type_name(type_owner, type_package, type_name)} definition inside package is not supported as part of other type definition," <<
    " use CREATE TYPE outside package" if typecode == "COLLECTION"
  typecode
end

#get_element_definition(argument_metadata) ⇒ Object

:nodoc:



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# File 'lib/plsql/procedure.rb', line 411

def get_element_definition(argument_metadata) #:nodoc:
  element_metadata = {}
  if collection_type?(argument_metadata[:data_type])
    case argument_metadata[:type_object_type]
    when "PACKAGE"
      r = @schema.select_first(
        "SELECT elem_type_owner, elem_type_name, elem_type_package, length, precision, scale, char_used, index_by
         FROM ALL_PLSQL_COLL_TYPES t
         WHERE t.OWNER = :owner AND t.TYPE_NAME = :type_name AND t.PACKAGE_NAME = :package_name",
        @schema_name, argument_metadata[:type_name], argument_metadata[:type_subname])

      elem_type_owner, elem_type_name, elem_type_package, elem_length, elem_precision, elem_scale, elem_char_used, index_by = r

      if index_by == "VARCHAR2"
        raise ArgumentError, "Index-by Varchar-Table (associative array) #{argument_metadata[:type_name]} is not supported"
      end

      element_metadata = {
        position: 1,
        data_type: if elem_type_owner == nil
                     elem_type_name
                   else
                     elem_type_package != nil ? "PL/SQL RECORD" : "OBJECT"
                   end,
        in_out: argument_metadata[:in_out],
        data_length: elem_length && elem_length.to_i,
        data_precision: elem_precision && elem_precision.to_i,
        data_scale: elem_scale && elem_scale.to_i,
        char_used: elem_char_used,
        char_length: elem_char_used && elem_length && elem_length.to_i,
        type_owner: elem_type_owner,
        type_name: elem_type_name,
        type_subname: elem_type_package,
        sql_type_name: elem_type_owner && build_sql_type_name(elem_type_owner, elem_type_package, elem_type_name),
        type_object_type: elem_type_package != nil ? "PACKAGE" : nil,
        defaulted: argument_metadata[:defaulted]
      }

      if elem_type_package != nil
        element_metadata[:fields] = get_field_definitions(element_metadata)
      end
    when "TYPE"
      r = @schema.select_first(
        "SELECT elem_type_owner, elem_type_name, length, precision, scale, char_used
         FROM ALL_COLL_TYPES t
         WHERE t.owner = :owner AND t.TYPE_NAME = :type_name",
        @schema_name, argument_metadata[:type_name]
      )
      elem_type_owner, elem_type_name, elem_length, elem_precision, elem_scale, elem_char_used = r

      element_metadata = {
        position: 1,
        data_type: elem_type_owner == nil ? elem_type_name : "OBJECT",
        in_out: argument_metadata[:in_out],
        data_length: elem_length && elem_length.to_i,
        data_precision: elem_precision && elem_precision.to_i,
        data_scale: elem_scale && elem_scale.to_i,
        char_used: elem_char_used,
        char_length: elem_char_used && elem_length && elem_length.to_i,
        type_owner: elem_type_owner,
        type_name: elem_type_name,
        type_subname: nil,
        sql_type_name: elem_type_owner && build_sql_type_name(elem_type_owner, nil, elem_type_name),
        defaulted: argument_metadata[:defaulted]
      }
    end
  else
    element_metadata = {
      position: 1,
      data_type: "PL/SQL RECORD",
      in_out: argument_metadata[:in_out],
      data_length: nil,
      data_precision: nil,
      data_scale: nil,
      char_used: "B",
      char_length: 0,
      type_owner: argument_metadata[:type_owner],
      type_name: argument_metadata[:type_name],
      type_subname: argument_metadata[:type_subname],
      sql_type_name: build_sql_type_name(argument_metadata[:type_owner], argument_metadata[:type_subname], argument_metadata[:type_name]),
      defaulted: argument_metadata[:defaulted]
    }

    if element_metadata[:type_subname] != nil
      element_metadata[:fields] = get_field_definitions(element_metadata)
    end
  end
  element_metadata
end

#get_field_definitions(argument_metadata) ⇒ Object

:nodoc:



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# File 'lib/plsql/procedure.rb', line 348

def get_field_definitions(argument_metadata) #:nodoc:
  fields = {}
  case argument_metadata[:type_object_type]
  when "PACKAGE"
    @schema.select_all(
      "SELECT attr_no, attr_name, attr_type_owner, attr_type_name, attr_type_package, length, precision, scale, char_used
      FROM ALL_PLSQL_TYPES t, ALL_PLSQL_TYPE_ATTRS ta
      WHERE t.OWNER = :owner AND t.type_name = :type_name AND t.package_name = :package_name
      AND ta.OWNER = t.owner AND ta.TYPE_NAME = t.TYPE_NAME AND ta.PACKAGE_NAME = t.PACKAGE_NAME
      ORDER BY attr_no",
      @schema_name, argument_metadata[:type_name], argument_metadata[:type_subname]) do |r|

      attr_no, attr_name, attr_type_owner, attr_type_name, attr_type_package, attr_length, attr_precision, attr_scale, attr_char_used = r

      fields[attr_name.downcase.to_sym] = {
        position: attr_no.to_i,
        data_type: attr_type_owner == nil ? attr_type_name : get_composite_type(attr_type_owner, attr_type_name, attr_type_package),
        in_out: argument_metadata[:in_out],
        data_length: attr_length && attr_length.to_i,
        data_precision: attr_precision && attr_precision.to_i,
        data_scale: attr_scale && attr_scale.to_i,
        char_used: attr_char_used == nil ? "0" : attr_char_used,
        char_length: attr_char_used && attr_length && attr_length.to_i,
        type_owner: attr_type_owner,
        type_name: attr_type_owner && attr_type_name,
        type_subname: attr_type_package,
        sql_type_name: attr_type_owner && build_sql_type_name(attr_type_owner, attr_type_package, attr_type_name),
        defaulted: argument_metadata[:defaulted]
      }

      if fields[attr_name.downcase.to_sym][:data_type] == "TABLE" && fields[attr_name.downcase.to_sym][:type_subname] != nil
        fields[attr_name.downcase.to_sym][:fields] = get_field_definitions(fields[attr_name.downcase.to_sym])
      end
    end
  when "TABLE", "VIEW"
    @schema.select_all(
      "SELECT column_id, column_name, data_type, data_length, data_precision, data_scale, char_length, char_used
       FROM ALL_TAB_COLS WHERE OWNER = :owner AND TABLE_NAME = :type_name
       ORDER BY column_id",
      @schema_name, argument_metadata[:type_name]) do |r|

      col_no, col_name, col_type_name, col_length, col_precision, col_scale, col_char_length, col_char_used = r

      fields[col_name.downcase.to_sym] = {
        position: col_no.to_i,
        data_type: col_type_name,
        in_out: argument_metadata[:in_out],
        data_length: col_length && col_length.to_i,
        data_precision: col_precision && col_precision.to_i,
        data_scale: col_scale && col_scale.to_i,
        char_used: col_char_used == nil ? "0" : col_char_used,
        char_length: col_char_length && col_char_length.to_i,
        type_owner: nil,
        type_name: nil,
        type_subname: nil,
        sql_type_name: nil,
        defaulted: argument_metadata[:defaulted]
      }
    end
  end
  fields
end

#overloaded? ⇒ Boolean

:nodoc:

Returns:

  • (Boolean) 


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# File 'lib/plsql/procedure.rb', line 522

def overloaded? #:nodoc:
  @overloaded
end