feat(snowflake)!: transpilation support current_version

[fivetran-ashashankar]

Transpilation support for current_version()

[github-actions]

SQLGlot Integration Test Results

Comparing:

• this branch (sqlglot:RD-1069314-transpile-current_version, sqlglot version: RD-1069314-transpile-current_version)
• baseline (main, sqlglot version: 28.9.1.dev21)

⚠️ Limited to dialects: duckdb

By Dialect

dialect	main	sqlglot:RD-1069314-transpile-current_version	difference	links
duckdb -> duckdb	4003/4003 passed (100.0%)	4003/4003 passed (100.0%)	No change	full result / delta

Overall

main: 4003 total, 4003 passed (pass rate: 100.0%), sqlglot version: 28.9.1.dev21

sqlglot:RD-1069314-transpile-current_version: 4003 total, 4003 passed (pass rate: 100.0%), sqlglot version: RD-1069314-transpile-current_version

Difference: No change

[geooo109]

Let's also include tests.

Moreover, why we have introduced a new token ?
We want to cover the transpilation from Snowflake -> Duckdb.

In snowflake:

ast = parse_one("SELECT CURRENT_VERSION()", dialect="snowflake")

ast:
Select(
  expressions=[
    CurrentVersion()])

So, we only need to apply the rename in the duckdb generator. (as you have already added)

Let's also add the parsing of the version in duckdb, and test the roundtrip.

[geooo109]

I will merge and take it to the finish line.