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Add support for quoted string backslash escaping (#1177)

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Ifeanyi Ubah 2024-04-21 15:07:56 +02:00 • committed by GitHub
parent 7b49c69b3a
commit d2c2b15f9e
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18 changed files with 352 additions and 996 deletions
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111
tests/sqlparser_hive.rs
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@ -17,7 +17,7 @@
use sqlparser::ast::{
CreateFunctionBody, CreateFunctionUsing, Expr, Function, FunctionDefinition, Ident, ObjectName,
SelectItem, Statement, TableFactor, UnaryOperator, Value,
SelectItem, Statement, TableFactor, UnaryOperator,
};
use sqlparser::dialect::{GenericDialect, HiveDialect, MsSqlDialect};
use sqlparser::parser::{ParserError, ParserOptions};
@ -420,115 +420,6 @@ fn parse_delimited_identifiers() {
//TODO verified_stmt(r#"UPDATE foo SET "bar" = 5"#);
}
#[test]
fn parse_like() {
fn chk(negated: bool) {
let sql = &format!(
"SELECT * FROM customers WHERE name {}LIKE '%a'",
if negated { "NOT " } else { "" }
);
let select = hive().verified_only_select(sql);
assert_eq!(
Expr::Like {
expr: Box::new(Expr::Identifier(Ident::new("name"))),
negated,
pattern: Box::new(Expr::Value(Value::SingleQuotedString("%a".to_string()))),
escape_char: None,
},
select.selection.unwrap()
);
// Test with escape char
let sql = &format!(
"SELECT * FROM customers WHERE name {}LIKE '%a' ESCAPE '\\'",
if negated { "NOT " } else { "" }
);
let select = hive().verified_only_select(sql);
assert_eq!(
Expr::Like {
expr: Box::new(Expr::Identifier(Ident::new("name"))),
negated,
pattern: Box::new(Expr::Value(Value::SingleQuotedString("%a".to_string()))),
escape_char: Some('\\'),
},
select.selection.unwrap()
);
// This statement tests that LIKE and NOT LIKE have the same precedence.
// This was previously mishandled (#81).
let sql = &format!(
"SELECT * FROM customers WHERE name {}LIKE '%a' IS NULL",
if negated { "NOT " } else { "" }
);
let select = hive().verified_only_select(sql);
assert_eq!(
Expr::IsNull(Box::new(Expr::Like {
expr: Box::new(Expr::Identifier(Ident::new("name"))),
negated,
pattern: Box::new(Expr::Value(Value::SingleQuotedString("%a".to_string()))),
escape_char: None,
})),
select.selection.unwrap()
);
}
chk(false);
chk(true);
}
#[test]
fn parse_similar_to() {
fn chk(negated: bool) {
let sql = &format!(
"SELECT * FROM customers WHERE name {}SIMILAR TO '%a'",
if negated { "NOT " } else { "" }
);
let select = hive().verified_only_select(sql);
assert_eq!(
Expr::SimilarTo {
expr: Box::new(Expr::Identifier(Ident::new("name"))),
negated,
pattern: Box::new(Expr::Value(Value::SingleQuotedString("%a".to_string()))),
escape_char: None,
},
select.selection.unwrap()
);
// Test with escape char
let sql = &format!(
"SELECT * FROM customers WHERE name {}SIMILAR TO '%a' ESCAPE '\\'",
if negated { "NOT " } else { "" }
);
let select = hive().verified_only_select(sql);
assert_eq!(
Expr::SimilarTo {
expr: Box::new(Expr::Identifier(Ident::new("name"))),
negated,
pattern: Box::new(Expr::Value(Value::SingleQuotedString("%a".to_string()))),
escape_char: Some('\\'),
},
select.selection.unwrap()
);
// This statement tests that SIMILAR TO and NOT SIMILAR TO have the same precedence.
let sql = &format!(
"SELECT * FROM customers WHERE name {}SIMILAR TO '%a' ESCAPE '\\' IS NULL",
if negated { "NOT " } else { "" }
);
let select = hive().verified_only_select(sql);
assert_eq!(
Expr::IsNull(Box::new(Expr::SimilarTo {
expr: Box::new(Expr::Identifier(Ident::new("name"))),
negated,
pattern: Box::new(Expr::Value(Value::SingleQuotedString("%a".to_string()))),
escape_char: Some('\\'),
})),
select.selection.unwrap()
);
}
chk(false);
chk(true);
}
fn hive() -> TestedDialects {
TestedDialects {
dialects: vec![Box::new(HiveDialect {})],