A Query Parser Exercise

The prompt for this exercise is in rust_code_challenge.pdf.

Run and testing

• cargo run will run using the sql found in queries.sql and metadata from columns.csv. This is configurable.
• cargo test will test against a couple of examples.

Output

The spec for this exercise didn't really have a goal output. So, cargo run prints the lineage and the opacity of that lineage for each sql statement in queries.sql.

Status

• simple select with identifiers and simple functions (like COUNT ) only
• column usage
• unions
• handling column aliases
• nested queries
• handling expressions with multiple source columns (like + or functions)