mirror of
https://github.com/apache/datafusion-sqlparser-rs.git
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99 lines
3.4 KiB
Rust
99 lines
3.4 KiB
Rust
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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#![warn(clippy::all)]
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/// A small command-line app to run the parser.
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/// Run with `cargo run --example cli`
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use std::fs;
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use simple_logger::SimpleLogger;
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use sqlparser::dialect::*;
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use sqlparser::parser::Parser;
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fn main() {
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SimpleLogger::new().init().unwrap();
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let filename = std::env::args().nth(1).expect(
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r#"
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No arguments provided!
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Usage:
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$ cargo run --example cli FILENAME.sql [--dialectname]
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To print the parse results as JSON:
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$ cargo run --feature json_example --example cli FILENAME.sql [--dialectname]
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"#,
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);
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let dialect: Box<dyn Dialect> = match std::env::args().nth(2).unwrap_or_default().as_ref() {
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"--ansi" => Box::new(AnsiDialect {}),
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"--bigquery" => Box::new(BigQueryDialect {}),
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"--postgres" => Box::new(PostgreSqlDialect {}),
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"--ms" => Box::new(MsSqlDialect {}),
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"--mysql" => Box::new(MySqlDialect {}),
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"--snowflake" => Box::new(SnowflakeDialect {}),
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"--hive" => Box::new(HiveDialect {}),
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"--redshift" => Box::new(RedshiftSqlDialect {}),
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"--clickhouse" => Box::new(ClickHouseDialect {}),
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"--duckdb" => Box::new(DuckDbDialect {}),
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"--sqlite" => Box::new(SQLiteDialect {}),
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"--generic" | "" => Box::new(GenericDialect {}),
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s => panic!("Unexpected parameter: {s}"),
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};
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println!("Parsing from file '{}' using {:?}", &filename, dialect);
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let contents = fs::read_to_string(&filename)
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.unwrap_or_else(|_| panic!("Unable to read the file {}", &filename));
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let without_bom = if contents.chars().next().unwrap() as u64 != 0xfeff {
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contents.as_str()
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} else {
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let mut chars = contents.chars();
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chars.next();
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chars.as_str()
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};
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let parse_result = Parser::parse_sql(&*dialect, without_bom);
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match parse_result {
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Ok(statements) => {
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println!(
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"Round-trip:\n'{}'",
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statements
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.iter()
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.map(std::string::ToString::to_string)
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.collect::<Vec<_>>()
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.join("\n")
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);
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if cfg!(feature = "json_example") {
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#[cfg(feature = "json_example")]
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{
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let serialized = serde_json::to_string_pretty(&statements).unwrap();
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println!("Serialized as JSON:\n{serialized}");
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}
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} else {
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println!("Parse results:\n{statements:#?}");
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}
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std::process::exit(0);
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}
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Err(e) => {
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println!("Error during parsing: {e:?}");
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std::process::exit(1);
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}
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}
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}
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