betodealmeida commented on a change in pull request #19055:
URL: https://github.com/apache/superset/pull/19055#discussion_r822119884
##########
File path: superset/sql_parse.py
##########
@@ -458,3 +460,178 @@ def validate_filter_clause(clause: str) -> None:
)
if open_parens > 0:
raise QueryClauseValidationException("Unclosed parenthesis in filter
clause")
+
+
+def has_table_query(statement: Statement) -> bool:
+ """
+ Return if a stament has a query reading from a table.
+
+ >>> has_table_query(sqlparse.parse("COUNT(*)")[0])
+ False
+ >>> has_table_query(sqlparse.parse("SELECT * FROM table")[0])
+ True
+
+ Note that queries reading from constant values return false:
+
+ >>> has_table_query(sqlparse.parse("SELECT * FROM (SELECT 1)")[0])
+ False
+
+ """
+ seen_source = False
+ tokens = statement.tokens[:]
+ while tokens:
+ token = tokens.pop(0)
+ if isinstance(token, TokenList):
+ tokens.extend(token.tokens)
+
+ if token.ttype == Keyword and token.value.lower() in ("from", "join"):
+ seen_source = True
+ elif seen_source and (
Review comment:
Yeah, in the `insert_rls` function I had to implement tree traversal to
get it right. Let me give it a try rewriting this one.
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