function call error handling

[MikeV]

I tried to dig into the code and find some breadcrumbs but I couldn't get anywhere...

import sqlvalidator

query = 'SELECT * FROM table WHERE cast(start_time as date) > dateadd(year,-3,now());'
sql_query = sqlvalidator.parse(query)
sql_query.is_valid()

raises:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File ".../python-3.9.4/lib/python3.9/site-packages/sqlvalidator/sql_validator.py", line 25, in is_valid
    self._validate()
  File ".../python-3.9.4/lib/python3.9/site-packages/sqlvalidator/sql_validator.py", line 31, in _validate
    self.errors = self.sql_query.validate()
  File ".../python-3.9.4/lib/python3.9/site-packages/sqlvalidator/grammar/sql.py", line 137, in validate
    errors += self.where_clause.validate(known_fields)
  File ".../python-3.9.4/lib/python3.9/site-packages/sqlvalidator/grammar/sql.py", line 272, in validate
    errors += self.value.validate(known_fields)
  File ".../python-3.9.4/lib/python3.9/site-packages/sqlvalidator/grammar/sql.py", line 1439, in validate
    errors += self.value.validate(known_fields)
  File ".../python-3.9.4/lib/python3.9/site-packages/sqlvalidator/grammar/sql.py", line 557, in validate
    errors += a.validate(known_fields)
AttributeError: 'str' object has no attribute 'validate'

[Timon Schmelzer]

Hi, I am facing the same issue, guessing that this is connected to the usage of CAST. Here is another example:

query = "SELECT CAST(X AS LONG) FROM table;"
res = sqlvalidator.parse(query)
res.is_valid()

File .../lib/python3.10/site-packages/sqlvalidator/sql_validator.py:25, in SQLQuery.is_valid(self)
     23 def is_valid(self) -> bool:
     24     if not self.validated:
---> 25         self._validate()
     26     return len(self.errors) == 0

File .../lib/python3.10/site-packages/sqlvalidator/sql_validator.py:31, in SQLQuery._validate(self)
     29 self.validated = True
     30 try:
---> 31     self.errors = self.sql_query.validate()
     32 except ParsingError as ex:
     33     self.errors.append(str(ex))

File .../lib/python3.10/site-packages/sqlvalidator/grammar/sql.py:133, in SelectStatement.validate(self, known_fields)
    130     known_fields = known_fields | self.from_statement.known_fields
    132 for e in self.expressions:
--> 133     errors += e.validate(known_fields)
    134 if self.from_statement:
    135     errors += self.from_statement.validate(known_fields=set())

File .../lib/python3.10/site-packages/sqlvalidator/grammar/sql.py:557, in FunctionCall.validate(self, known_fields)
    555 errors = super().validate(known_fields)
    556 for a in self.args:
--> 557     errors += a.validate(known_fields)
    558 return errors

AttributeError: 'str' object has no attribute 'validate'