def _eval(self, segment, dialect, **kwargs):
if segment.is_type("statement"):
queries = SelectCrawler.gather(segment, dialect)
# Begin analysis at the final, outer query (key=None).
self._visit_sources(queries.pop(None), dialect, queries)
if queries:
return LintResult(anchor=segment)
return None
def _eval(self, segment, dialect, **kwargs):
"""Outermost query should produce known number of columns."""
if segment.is_type("statement"):
queries = SelectCrawler.gather(segment, dialect)
# Begin analysis at the final, outer query (key=None).
select_info = queries[None]
try:
return self._analyze_result_columns(select_info, dialect, queries)
except RuleFailure:
return LintResult(anchor=queries[None][0].select_info.select_statement)
return None