class_docstr: Describes a schema of a table.
  
  .. note::
  
      Field names are matched by the exact name by default (case sensitive).
class_docstr_tok: ["Describes","a","schema","of","a","table",".","..","note",":",":","Field","names","are","matched","by","the","exact","name","by","default","(","case","sensitive",")","."]
docstr: Specifies the previously defined field as a processing-time attribute.
  
  E.g. field("proctime", Types.SQL_TIMESTAMP_LTZ).proctime()
  
  :return: This schema object.
docstr_tok: ["Specifies","the","previously","defined","field","as","a","processing-time","attribute",".","E.g",".","field","(","``","proctime","''",",","Types.SQL_TIMESTAMP_LTZ",")",".proctime","(",")",":","return",":","This","schema","object","."]
code: def proctime(self) -> "Schema":
      """
      Specifies the previously defined field as a processing-time attribute.
  
      E.g. field("proctime", Types.SQL_TIMESTAMP_LTZ).proctime()
  
      :return: This schema object.
      """
      self._j_schema = self._j_schema.proctime()
      return self
  
imports: import sys
  from abc import ABCMeta
  from collections import OrderedDict
  from py4j.java_gateway import get_method
  from typing import Dict, Union
  from pyflink.java_gateway import get_gateway
  from pyflink.table.table_schema import TableSchema
  from pyflink.table.types import DataType, _to_java_data_type
label_desc: Use image node_id 6 for calling the Schema obj's underlying member method code with example usage: obj.proctime() and returns: self