pub fn add_auto_table_alias(expr: Expression) -> Result<Expression>Expand description
Add auto-generated table aliases (like _t0) for POSEXPLODE/EXPLODE in FROM clause
when the alias has column_aliases but no alias name.
This is needed for Spark target: FROM POSEXPLODE(x) AS (a, b) -> FROM POSEXPLODE(x) AS _t0(a, b)