Method sql_to_expr

datafusion/sql/src/expr/mod.rs:167–179

Generate a relational expression from a SQL expression

(
        &self,
        sql: SQLExpr,
        schema: &DFSchema,
        planner_context: &mut PlannerContext,
    )

    /// Generate a relational expression from a SQL expression
    pub fn sql_to_expr(
        &self,
        sql: SQLExpr,
        schema: &DFSchema,
        planner_context: &mut PlannerContext,
    ) -> Result<Expr> {
        // The location of the original SQL expression in the source code
        let mut expr = self.sql_expr_to_logical_expr(sql, schema, planner_context)?;
        expr = self.rewrite_partial_qualifier(expr, schema);
        self.validate_schema_satisfies_exprs(schema, std::slice::from_ref(&expr))?;
        let (expr, _) = expr.infer_placeholder_types(schema)?;
        Ok(expr)
    }

    /// Rewrite aliases which are not-complete (e.g. ones that only include only table qualifier in a schema.table qualified relation)
    fn rewrite_partial_qualifier(&self, expr: Expr, schema: &DFSchema) -> Expr {