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support for session transaction and transaction snapshot. (#379)

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* add support for snapshot id in set transaction

Signed-off-by: poonai <rbalajis25@gmail.com>

* add support for default session transaction characteristics

Signed-off-by: poonai <rbalajis25@gmail.com>

* add additional assertion for parse_set_transaction test

Signed-off-by: poonai <rbalajis25@gmail.com>

* Fix clippy

Co-authored-by: Andrew Lamb <andrew@nerdnetworks.org>
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Poonai 2021-12-15 01:43:12 +05:30 • committed by GitHub
parent a81805ea30
commit 4c121a92a6
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5 changed files with 78 additions and 11 deletions
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19
src/parser.rs
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@ -2670,9 +2670,26 @@ impl<'a> Parser<'a> {
value: values,
});
}
} else if variable.value == "TRANSACTION" && modifier.is_none() {
} else if variable.value == "CHARACTERISTICS" {
self.expect_keywords(&[Keyword::AS, Keyword::TRANSACTION])?;
Ok(Statement::SetTransaction {
modes: self.parse_transaction_modes()?,
snapshot: None,
session: true,
})
} else if variable.value == "TRANSACTION" && modifier.is_none() {
if self.parse_keyword(Keyword::SNAPSHOT) {
let snaphot_id = self.parse_value()?;
return Ok(Statement::SetTransaction {
modes: vec![],
snapshot: Some(snaphot_id),
session: false,
});
}
Ok(Statement::SetTransaction {
modes: self.parse_transaction_modes()?,
snapshot: None,
session: false,
})
} else {
self.expected("equals sign or TO", self.peek_token())