datafusion_functions/unicode/
planner.rs

1// Licensed to the Apache Software Foundation (ASF) under one
2// or more contributor license agreements.  See the NOTICE file
3// distributed with this work for additional information
4// regarding copyright ownership.  The ASF licenses this file
5// to you under the Apache License, Version 2.0 (the
6// "License"); you may not use this file except in compliance
7// with the License.  You may obtain a copy of the License at
8//
9//   http://www.apache.org/licenses/LICENSE-2.0
10//
11// Unless required by applicable law or agreed to in writing,
12// software distributed under the License is distributed on an
13// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
14// KIND, either express or implied.  See the License for the
15// specific language governing permissions and limitations
16// under the License.
17
18//! SQL planning extensions like [`UnicodeFunctionPlanner`]
19
20use datafusion_expr::expr::ScalarFunction;
21use datafusion_expr::planner::{ExprPlanner, PlannerResult};
22use datafusion_expr::Expr;
23
24#[derive(Default, Debug)]
25pub struct UnicodeFunctionPlanner;
26
27impl ExprPlanner for UnicodeFunctionPlanner {
28    fn plan_position(
29        &self,
30        args: Vec<Expr>,
31    ) -> datafusion_common::Result<PlannerResult<Vec<Expr>>> {
32        Ok(PlannerResult::Planned(Expr::ScalarFunction(
33            ScalarFunction::new_udf(crate::unicode::strpos(), args),
34        )))
35    }
36
37    fn plan_substring(
38        &self,
39        args: Vec<Expr>,
40    ) -> datafusion_common::Result<PlannerResult<Vec<Expr>>> {
41        Ok(PlannerResult::Planned(Expr::ScalarFunction(
42            ScalarFunction::new_udf(crate::unicode::substr(), args),
43        )))
44    }
45}
datafusion_functions/unicode/planner.rs

datafusion_functions/unicode/
planner.rs
