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Support SEMI/ANTI JOIN syntax (#723)

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mingmwang 2022-12-01 01:57:45 +08:00 • committed by GitHub
parent 1f22ea74ae
commit 96bca38fae
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4 changed files with 118 additions and 7 deletions
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55
src/parser.rs
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@ -4830,16 +4830,57 @@ impl<'a> Parser<'a> {
self.expect_keyword(Keyword::JOIN)?;
JoinOperator::Inner
}
kw @ Keyword::LEFT | kw @ Keyword::RIGHT | kw @ Keyword::FULL => {
kw @ Keyword::LEFT | kw @ Keyword::RIGHT => {
let _ = self.next_token();
let join_type = self.parse_one_of_keywords(&[
Keyword::OUTER,
Keyword::SEMI,
Keyword::ANTI,
Keyword::JOIN,
]);
match join_type {
Some(Keyword::OUTER) => {
self.expect_keyword(Keyword::JOIN)?;
match kw {
Keyword::LEFT => JoinOperator::LeftOuter,
Keyword::RIGHT => JoinOperator::RightOuter,
_ => unreachable!(),
}
}
Some(Keyword::SEMI) => {
self.expect_keyword(Keyword::JOIN)?;
match kw {
Keyword::LEFT => JoinOperator::LeftSemi,
Keyword::RIGHT => JoinOperator::RightSemi,
_ => unreachable!(),
}
}
Some(Keyword::ANTI) => {
self.expect_keyword(Keyword::JOIN)?;
match kw {
Keyword::LEFT => JoinOperator::LeftAnti,
Keyword::RIGHT => JoinOperator::RightAnti,
_ => unreachable!(),
}
}
Some(Keyword::JOIN) => match kw {
Keyword::LEFT => JoinOperator::LeftOuter,
Keyword::RIGHT => JoinOperator::RightOuter,
_ => unreachable!(),
},
_ => {
return Err(ParserError::ParserError(format!(
"expected OUTER, SEMI, ANTI or JOIN after {:?}",
kw
)))
}
}
}
Keyword::FULL => {
let _ = self.next_token();
let _ = self.parse_keyword(Keyword::OUTER);
self.expect_keyword(Keyword::JOIN)?;
match kw {
Keyword::LEFT => JoinOperator::LeftOuter,
Keyword::RIGHT => JoinOperator::RightOuter,
Keyword::FULL => JoinOperator::FullOuter,
_ => unreachable!(),
}
JoinOperator::FullOuter
}
Keyword::OUTER => {
return self.expected("LEFT, RIGHT, or FULL", self.peek_token());