waitingkuo commented on code in PR #5914:
URL: https://github.com/apache/arrow-datafusion/pull/5914#discussion_r1160650735
##########
datafusion/sql/src/expr/arrow_cast.rs:
##########
@@ -167,6 +167,34 @@ impl<'a> Parser<'a> {
}
}
+ /// Parses the next timezone
+ fn parse_timezone(&mut self, context: &str) -> Result<Option<String>> {
+ match self.next_token()? {
+ Token::None => Ok(None),
+ Token::Some => {
+ self.expect_token(Token::LParen)?;
+ let timezone = self.parse_double_quoted_string("Timezone")?;
+ self.expect_token(Token::RParen)?;
+ Ok(Some(timezone))
+ }
+ tok => Err(make_error(
+ self.val,
+ &format!("finding Timezone for {context}, got {tok}"),
+ )),
+ }
+ }
+
+ /// Parses the next double quoted string
+ fn parse_double_quoted_string(&mut self, context: &str) -> Result<String> {
+ match self.next_token()? {
+ Token::DoubleQuotedString(s) => Ok(s),
+ tok => Err(make_error(
+ self.val,
+ &format!("finding double quoted string for {context}, got
'{tok}'"),
+ )),
+ }
+ }
+
Review Comment:
add parser to parse the double quoted string e.g. "+00:00"
##########
datafusion/sql/src/expr/arrow_cast.rs:
##########
@@ -167,6 +167,34 @@ impl<'a> Parser<'a> {
}
}
+ /// Parses the next timezone
+ fn parse_timezone(&mut self, context: &str) -> Result<Option<String>> {
+ match self.next_token()? {
+ Token::None => Ok(None),
+ Token::Some => {
+ self.expect_token(Token::LParen)?;
+ let timezone = self.parse_double_quoted_string("Timezone")?;
+ self.expect_token(Token::RParen)?;
+ Ok(Some(timezone))
+ }
+ tok => Err(make_error(
+ self.val,
+ &format!("finding Timezone for {context}, got {tok}"),
+ )),
+ }
+ }
Review Comment:
add a parser to parse timezone `Option<String>`
either `None`, or `Some("SomeTimezone")`
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