mirrors/datafusion-sqlparse
1
0
Fork 0
mirror of https://github.com/apache/datafusion-sqlparser-rs.git synced 2025-10-11 22:42:02 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 3

Support nested joins

Browse source 
Fix #83.
This commit is contained in:
Nikhil Benesch 2019-05-30 22:17:35 -04:00
parent 1f87083906
commit 8fbf82deb0
No known key found for this signature in database
GPG key ID: F7386C5DEADABA7F
3 changed files with 82 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

29
src/sqlparser.rs
View file

@ -1537,14 +1537,27 @@ impl Parser {
pub fn parse_table_factor(&mut self) -> Result<TableFactor, ParserError> {
let lateral = self.parse_keyword("LATERAL");
if self.consume_token(&Token::LParen) {
let subquery = Box::new(self.parse_query()?);
self.expect_token(&Token::RParen)?;
let alias = self.parse_optional_table_alias(keywords::RESERVED_FOR_TABLE_ALIAS)?;
Ok(TableFactor::Derived {
lateral,
subquery,
alias,
})
if self.parse_keyword("SELECT")
|| self.parse_keyword("WITH")
|| self.parse_keyword("VALUES")
{
self.prev_token();
let subquery = Box::new(self.parse_query()?);
self.expect_token(&Token::RParen)?;
let alias = self.parse_optional_table_alias(keywords::RESERVED_FOR_TABLE_ALIAS)?;
Ok(TableFactor::Derived {
lateral,
subquery,
alias,
})
} else if lateral {
parser_err!("Expected subquery after LATERAL, found nested join".to_string())
} else {
let base = Box::new(self.parse_table_factor()?);
let joins = self.parse_joins()?;
self.expect_token(&Token::RParen)?;
Ok(TableFactor::NestedJoin { base, joins })
}
} else if lateral {
self.expected("subquery after LATERAL", self.peek_token())
} else {