BigQuery: Add support for BEGIN
#1718
Conversation
iffyio
force-pushed
the
bq-begin-exception
branch
from
46f28fa to
f3c803d
Compare
There was a problem hiding this comment.
LGTM @iffyio. I recently added support for something similar in MS-SQL, but only for the case where there's a semi-colon after the BEGIN/END TRY/CATCH keywords. I think your approach of Vec<Statement> is better, and I'll align to that.
iffyio
force-pushed
the
bq-begin-exception
branch
from
f3c803d to
f018574
Compare
There was a problem hiding this comment.
Thanks @iffyio and @yoavcloud -- looks like a nice improvement to me!
src/ast/mod.rs
Outdated
| /// END; | ||
| /// ``` | ||
| /// <https://cloud.google.com/bigquery/docs/reference/standard-sql/procedural-language#beginexceptionend> | ||
| has_exception_when_clause: bool, |
There was a problem hiding this comment.
I wondered if this field redundant with when exception_statements is empty? However, given the test cases below, it seems it is possible to have a EXCEPTION WHEN ERROR THEN END (without any statements) so distinguishing is necessary
BTW another more Rusty way might be to represent this as
exception_statements: Option<Vec<Statement>>,I don't feel strongly about this however
There was a problem hiding this comment.
Yeah I think that makes sense, I initially figured to use an explicit flag in case it was possible to have exception statements with a different syntax but probably no need to do that unless necessary, will update to use an option!
There was a problem hiding this comment.
I think using the somewhat akward Option<Vec<..>> would allow the different syntax.
I can help if that would be good
There was a problem hiding this comment.
Done! updated to use an Option
Adds support for the `BEGIN ... EXCEPTION ... END` syntax in BigQuery: ```sql BEGIN SELECT 1; SELECT 2; EXCEPTION WHEN ERROR THEN SELECT 3; SELECT 4; END ``` https://cloud.google.com/bigquery/docs/reference/standard-sql/procedural-language#beginexceptionend
iffyio
force-pushed
the
bq-begin-exception
branch
from
f018574 to
798f070
Compare
| // since display_separated doesn't handle that case. | ||
| write!(f, ";")?; | ||
| } | ||
| if let Some(exception_statements) = exception_statements { |
Adds support for the
BEGIN ... EXCEPTION ... ENDsyntax in BigQuery:https://cloud.google.com/bigquery/docs/reference/standard-sql/procedural-language#beginexceptionend