Class: ActiveRecord::ConnectionAdapters::OracleEnhancedJDBCConnection::Cursor

Inherits:
Object
  • Object
show all
Defined in:
lib/active_record/connection_adapters/oracle_enhanced_jdbc_connection.rb

Instance Method Summary collapse

Constructor Details

#initialize(connection, raw_statement) ⇒ Cursor

Returns a new instance of Cursor.



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# File 'lib/active_record/connection_adapters/oracle_enhanced_jdbc_connection.rb', line 325

def initialize(connection, raw_statement)
  @connection = connection
  @raw_statement = raw_statement
end

Instance Method Details

#bind_param(position, value, column = nil) ⇒ Object 



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# File 'lib/active_record/connection_adapters/oracle_enhanced_jdbc_connection.rb', line 330

def bind_param(position, value, column = nil)
  col_type = column && column.type
  java_value = ruby_to_java_value(value, col_type)
  case value
  when Integer
    @raw_statement.setLong(position, java_value)
  when Float
    @raw_statement.setFloat(position, java_value)
  when BigDecimal
    @raw_statement.setBigDecimal(position, java_value)
  when String
    case col_type
    when :text
      @raw_statement.setClob(position, java_value)
    when :binary
      @raw_statement.setBlob(position, java_value)
    when :raw
      @raw_statement.setString(position, OracleEnhancedAdapter.encode_raw(java_value))
    when :decimal
      @raw_statement.setBigDecimal(position, java_value)
    else
      @raw_statement.setString(position, java_value)
    end
  when Date, DateTime
    @raw_statement.setDATE(position, java_value)
  when Time
    @raw_statement.setTimestamp(position, java_value)
  when NilClass
    if column && column.object_type?
      @raw_statement.setNull(position, java.sql.Types::STRUCT, column.sql_type)
    else
      # TODO: currently nil is always bound as NULL with VARCHAR type.
      # When nils will actually be used by ActiveRecord as bound parameters
      # then need to pass actual column type.
      @raw_statement.setNull(position, java.sql.Types::VARCHAR)
    end
  else
    raise ArgumentError, "Don't know how to bind variable with type #{value.class}"
  end
end

#bind_returning_param(position, bind_type) ⇒ Object 



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# File 'lib/active_record/connection_adapters/oracle_enhanced_jdbc_connection.rb', line 371

def bind_returning_param(position, bind_type)
  @returning_positions ||= []
  @returning_positions << position
  if bind_type == Integer
    @raw_statement.registerReturnParameter(position, java.sql.Types::BIGINT)
  end
end

#close ⇒ Object 



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# File 'lib/active_record/connection_adapters/oracle_enhanced_jdbc_connection.rb', line 428

def close
  @raw_statement.close
end

#column_names ⇒ Object Also known as: get_col_names 



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# File 'lib/active_record/connection_adapters/oracle_enhanced_jdbc_connection.rb', line 396

def column_names
  @column_names ||= (1..metadata.getColumnCount).map{|i| metadata.getColumnName(i)}
end

#column_types ⇒ Object 



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# File 'lib/active_record/connection_adapters/oracle_enhanced_jdbc_connection.rb', line 392

def column_types
  @column_types ||= (1..metadata.getColumnCount).map{|i| metadata.getColumnTypeName(i).to_sym}
end

#exec ⇒ Object 



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# File 'lib/active_record/connection_adapters/oracle_enhanced_jdbc_connection.rb', line 379

def exec
  @raw_result_set = @raw_statement.executeQuery
  true
end

#exec_update ⇒ Object 



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# File 'lib/active_record/connection_adapters/oracle_enhanced_jdbc_connection.rb', line 384

def exec_update
  @raw_statement.executeUpdate
end

#fetch(options = {}) ⇒ Object 



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# File 'lib/active_record/connection_adapters/oracle_enhanced_jdbc_connection.rb', line 401

def fetch(options={})
  if @raw_result_set.next
    get_lob_value = options[:get_lob_value]
    row_values = []
    column_types.each_with_index do |column_type, i|
      row_values <<
        @connection.get_ruby_value_from_result_set(@raw_result_set, i+1, column_type, get_lob_value)
    end
    row_values
  else
    @raw_result_set.close
    nil
  end
end

#get_returning_param(position, type) ⇒ Object 



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# File 'lib/active_record/connection_adapters/oracle_enhanced_jdbc_connection.rb', line 416

def get_returning_param(position, type)
  rs_position = @returning_positions.index(position) + 1
  rs = @raw_statement.getReturnResultSet
  if rs.next
    # Assuming that primary key will not be larger as long max value
    returning_id = rs.getLong(rs_position)
    rs.wasNull ? nil : returning_id
  else
    nil
  end
end

#metadata ⇒ Object 



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# File 'lib/active_record/connection_adapters/oracle_enhanced_jdbc_connection.rb', line 388

def metadata
  @metadata ||= @raw_result_set.getMetaData
end