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sqlparser_snowflake.rs
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sqlparser_snowflake.rs
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// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#![warn(clippy::all)]
//! Test SQL syntax specific to Snowflake. The parser based on the
//! generic dialect is also tested (on the inputs it can handle).
#[macro_use]
mod test_utils;
use test_utils::*;
use sqlparser::ast::*;
use sqlparser::dialect::{GenericDialect, SnowflakeDialect};
use sqlparser::parser::ParserError;
use sqlparser::tokenizer::*;
#[test]
fn test_snowflake_create_table() {
let sql = "CREATE TABLE _my_$table (am00unt number)";
match snowflake_and_generic().verified_stmt(sql) {
Statement::CreateTable { name, .. } => {
assert_eq!("_my_$table", name.to_string());
}
_ => unreachable!(),
}
}
#[test]
fn test_snowflake_single_line_tokenize() {
let sql = "CREATE TABLE# this is a comment \ntable_1";
let dialect = SnowflakeDialect {};
let mut tokenizer = Tokenizer::new(&dialect, sql);
let tokens = tokenizer.tokenize().unwrap();
let expected = vec![
Token::make_keyword("CREATE"),
Token::Whitespace(Whitespace::Space),
Token::make_keyword("TABLE"),
Token::Whitespace(Whitespace::SingleLineComment {
prefix: "#".to_string(),
comment: " this is a comment \n".to_string(),
}),
Token::make_word("table_1", None),
];
assert_eq!(expected, tokens);
let sql = "CREATE TABLE// this is a comment \ntable_1";
let mut tokenizer = Tokenizer::new(&dialect, sql);
let tokens = tokenizer.tokenize().unwrap();
let expected = vec![
Token::make_keyword("CREATE"),
Token::Whitespace(Whitespace::Space),
Token::make_keyword("TABLE"),
Token::Whitespace(Whitespace::SingleLineComment {
prefix: "//".to_string(),
comment: " this is a comment \n".to_string(),
}),
Token::make_word("table_1", None),
];
assert_eq!(expected, tokens);
}
#[test]
fn test_sf_derived_table_in_parenthesis() {
// Nesting a subquery in an extra set of parentheses is non-standard,
// but supported in Snowflake SQL
snowflake_and_generic().one_statement_parses_to(
"SELECT * FROM ((SELECT 1) AS t)",
"SELECT * FROM (SELECT 1) AS t",
);
snowflake_and_generic().one_statement_parses_to(
"SELECT * FROM (((SELECT 1) AS t))",
"SELECT * FROM (SELECT 1) AS t",
);
}
#[test]
fn test_single_table_in_parenthesis() {
// Parenthesized table names are non-standard, but supported in Snowflake SQL
snowflake_and_generic().one_statement_parses_to(
"SELECT * FROM (a NATURAL JOIN (b))",
"SELECT * FROM (a NATURAL JOIN b)",
);
snowflake_and_generic().one_statement_parses_to(
"SELECT * FROM (a NATURAL JOIN ((b)))",
"SELECT * FROM (a NATURAL JOIN b)",
);
}
#[test]
fn test_single_table_in_parenthesis_with_alias() {
snowflake_and_generic().one_statement_parses_to(
"SELECT * FROM (a NATURAL JOIN (b) c )",
"SELECT * FROM (a NATURAL JOIN b AS c)",
);
snowflake_and_generic().one_statement_parses_to(
"SELECT * FROM (a NATURAL JOIN ((b)) c )",
"SELECT * FROM (a NATURAL JOIN b AS c)",
);
snowflake_and_generic().one_statement_parses_to(
"SELECT * FROM (a NATURAL JOIN ( (b) c ) )",
"SELECT * FROM (a NATURAL JOIN b AS c)",
);
snowflake_and_generic().one_statement_parses_to(
"SELECT * FROM (a NATURAL JOIN ( (b) as c ) )",
"SELECT * FROM (a NATURAL JOIN b AS c)",
);
snowflake_and_generic().one_statement_parses_to(
"SELECT * FROM (a alias1 NATURAL JOIN ( (b) c ) )",
"SELECT * FROM (a AS alias1 NATURAL JOIN b AS c)",
);
snowflake_and_generic().one_statement_parses_to(
"SELECT * FROM (a as alias1 NATURAL JOIN ( (b) as c ) )",
"SELECT * FROM (a AS alias1 NATURAL JOIN b AS c)",
);
snowflake_and_generic().one_statement_parses_to(
"SELECT * FROM (a NATURAL JOIN b) c",
"SELECT * FROM (a NATURAL JOIN b) AS c",
);
let res = snowflake().parse_sql_statements("SELECT * FROM (a b) c");
assert_eq!(
ParserError::ParserError("duplicate alias b".to_string()),
res.unwrap_err()
);
}
#[test]
fn parse_json_using_colon() {
let sql = "SELECT a:b FROM t";
let select = snowflake().verified_only_select(sql);
assert_eq!(
SelectItem::UnnamedExpr(Expr::JsonAccess {
left: Box::new(Expr::Identifier(Ident::new("a"))),
operator: JsonOperator::Colon,
right: Box::new(Expr::Value(Value::UnQuotedString("b".to_string()))),
}),
select.projection[0]
);
snowflake().one_statement_parses_to("SELECT a:b::int FROM t", "SELECT CAST(a:b AS INT) FROM t");
}
fn snowflake() -> TestedDialects {
TestedDialects {
dialects: vec![Box::new(SnowflakeDialect {})],
}
}
fn snowflake_and_generic() -> TestedDialects {
TestedDialects {
dialects: vec![Box::new(SnowflakeDialect {}), Box::new(GenericDialect {})],
}
}