Fixed NotImplimentedError for other DBs

Author: RoderickJDunn

sqeleton/databases/base.py

@@ -169,7 +169,7 @@ def explain_as_text(self, query: str) -> str:
         return f"EXPLAIN {query}"
 
     def optimizer_hints(self, s: str):
-        return f"/*+ {s} */ " if s else ""
+        return f"/*+ {s} */ "
 
     def _constant_value(self, v):
         if v is None:

sqeleton/queries/ast_classes.py

@@ -700,7 +700,7 @@ def compile(self, parent_c: Compiler) -> str:
 
         columns = ", ".join(map(c.compile, self.columns)) if self.columns else "*"
         distinct = "DISTINCT " if self.distinct else ""
-        optimizer_hints = c.dialect.optimizer_hints(self.optimizer_hints)
+        optimizer_hints = c.dialect.optimizer_hints(self.optimizer_hints) if self.optimizer_hints else ""
         select = f"SELECT {optimizer_hints}{distinct}{columns}"
 
         if self.table: