mirror of
https://github.com/apache/datafusion-sqlparser-rs.git
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157 lines
5 KiB
Rust
157 lines
5 KiB
Rust
// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// 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, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#![warn(clippy::all)]
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//! Test SQL syntax specific to Snowflake. The parser based on the
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//! generic dialect is also tested (on the inputs it can handle).
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#[macro_use]
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mod test_utils;
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use test_utils::*;
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use sqlparser::ast::*;
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use sqlparser::dialect::{GenericDialect, SnowflakeDialect};
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use sqlparser::parser::ParserError;
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use sqlparser::tokenizer::*;
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#[test]
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fn test_snowflake_create_table() {
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let sql = "CREATE TABLE _my_$table (am00unt number)";
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match snowflake_and_generic().verified_stmt(sql) {
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Statement::CreateTable { name, .. } => {
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assert_eq!("_my_$table", name.to_string());
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}
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_ => unreachable!(),
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}
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}
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#[test]
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fn test_snowflake_single_line_tokenize() {
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let sql = "CREATE TABLE# this is a comment \ntable_1";
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let dialect = SnowflakeDialect {};
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let mut tokenizer = Tokenizer::new(&dialect, sql);
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let tokens = tokenizer.tokenize().unwrap();
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let expected = vec![
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Token::make_keyword("CREATE"),
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Token::Whitespace(Whitespace::Space),
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Token::make_keyword("TABLE"),
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Token::Whitespace(Whitespace::SingleLineComment {
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prefix: "#".to_string(),
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comment: " this is a comment \n".to_string(),
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}),
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Token::make_word("table_1", None),
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];
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assert_eq!(expected, tokens);
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let sql = "CREATE TABLE// this is a comment \ntable_1";
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let mut tokenizer = Tokenizer::new(&dialect, sql);
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let tokens = tokenizer.tokenize().unwrap();
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let expected = vec![
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Token::make_keyword("CREATE"),
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Token::Whitespace(Whitespace::Space),
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Token::make_keyword("TABLE"),
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Token::Whitespace(Whitespace::SingleLineComment {
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prefix: "//".to_string(),
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comment: " this is a comment \n".to_string(),
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}),
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Token::make_word("table_1", None),
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];
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assert_eq!(expected, tokens);
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}
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#[test]
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fn test_sf_derived_table_in_parenthesis() {
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// Nesting a subquery in an extra set of parentheses is non-standard,
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// but supported in Snowflake SQL
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snowflake_and_generic().one_statement_parses_to(
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"SELECT * FROM ((SELECT 1) AS t)",
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"SELECT * FROM (SELECT 1) AS t",
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);
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snowflake_and_generic().one_statement_parses_to(
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"SELECT * FROM (((SELECT 1) AS t))",
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"SELECT * FROM (SELECT 1) AS t",
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);
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}
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#[test]
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fn test_single_table_in_parenthesis() {
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// Parenthesized table names are non-standard, but supported in Snowflake SQL
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snowflake_and_generic().one_statement_parses_to(
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"SELECT * FROM (a NATURAL JOIN (b))",
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"SELECT * FROM (a NATURAL JOIN b)",
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);
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snowflake_and_generic().one_statement_parses_to(
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"SELECT * FROM (a NATURAL JOIN ((b)))",
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"SELECT * FROM (a NATURAL JOIN b)",
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);
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}
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#[test]
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fn test_single_table_in_parenthesis_with_alias() {
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snowflake_and_generic().one_statement_parses_to(
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"SELECT * FROM (a NATURAL JOIN (b) c )",
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"SELECT * FROM (a NATURAL JOIN b AS c)",
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);
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snowflake_and_generic().one_statement_parses_to(
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"SELECT * FROM (a NATURAL JOIN ((b)) c )",
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"SELECT * FROM (a NATURAL JOIN b AS c)",
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);
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snowflake_and_generic().one_statement_parses_to(
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"SELECT * FROM (a NATURAL JOIN ( (b) c ) )",
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"SELECT * FROM (a NATURAL JOIN b AS c)",
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);
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snowflake_and_generic().one_statement_parses_to(
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"SELECT * FROM (a NATURAL JOIN ( (b) as c ) )",
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"SELECT * FROM (a NATURAL JOIN b AS c)",
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);
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snowflake_and_generic().one_statement_parses_to(
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"SELECT * FROM (a alias1 NATURAL JOIN ( (b) c ) )",
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"SELECT * FROM (a AS alias1 NATURAL JOIN b AS c)",
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);
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snowflake_and_generic().one_statement_parses_to(
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"SELECT * FROM (a as alias1 NATURAL JOIN ( (b) as c ) )",
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"SELECT * FROM (a AS alias1 NATURAL JOIN b AS c)",
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);
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let res = snowflake_and_generic().parse_sql_statements("SELECT * FROM (a NATURAL JOIN b) c");
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assert_eq!(
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ParserError::ParserError("Expected end of statement, found: c".to_string()),
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res.unwrap_err()
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);
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let res = snowflake().parse_sql_statements("SELECT * FROM (a b) c");
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assert_eq!(
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ParserError::ParserError("duplicate alias b".to_string()),
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res.unwrap_err()
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);
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}
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fn snowflake() -> TestedDialects {
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TestedDialects {
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dialects: vec![Box::new(SnowflakeDialect {})],
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}
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}
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fn snowflake_and_generic() -> TestedDialects {
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TestedDialects {
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dialects: vec![Box::new(SnowflakeDialect {}), Box::new(GenericDialect {})],
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}
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}
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