hansott commented on code in PR #1677:
URL:
https://github.com/apache/datafusion-sqlparser-rs/pull/1677#discussion_r1928983817
##########
src/tokenizer.rs:
##########
@@ -1147,7 +1147,11 @@ impl<'a> Tokenizer<'a> {
s.push('.');
chars.next();
}
- s += &peeking_take_while(chars, |ch| ch.is_ascii_digit());
+
+ s += &peeking_take_while(chars, |ch| {
+ ch.is_ascii_digit()
+ ||
self.dialect.supports_numeric_literal_underscores() && ch == '_'
Review Comment:
What happens if starts or ends with `_`?
I think Clickhouse rejects that:
https://github.com/ClickHouse/ClickHouse/blob/master/src/Common/StringUtils.h#L171-L182
##########
src/tokenizer.rs:
##########
@@ -1147,7 +1147,11 @@ impl<'a> Tokenizer<'a> {
s.push('.');
chars.next();
}
- s += &peeking_take_while(chars, |ch| ch.is_ascii_digit());
+
+ s += &peeking_take_while(chars, |ch| {
+ ch.is_ascii_digit()
+ ||
self.dialect.supports_numeric_literal_underscores() && ch == '_'
Review Comment:
What happens if starts or ends with `_`?
I think ClickHouse rejects that:
https://github.com/ClickHouse/ClickHouse/blob/master/src/Common/StringUtils.h#L171-L182
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