class_docstr: Delete Table Statement constructed after parsing the input query
  
  Attributes:
      TableRef: table reference in the delete table statement
      _where_clause : predicate of the select query, represented as a expression tree.
code: def where_clause(self):
      return self._where_clause
  
file_path: evadb/evadb/parser/delete_statement.py
imports: from evadb.expression.abstract_expression import AbstractExpression
  from evadb.parser.statement import AbstractStatement
  from evadb.parser.table_ref import TableRef
  from evadb.parser.types import StatementType
label_desc: Use image node_id 4 for calling the DeleteTableStatement obj's underlying member method code with example usage: obj.where_clause() and returns: self