positiveblue 7aa2f390fe sqldb: add invoice queries ...

Set of queries to deal with invoices. A couple of things to take into
account:

    - Because the queries are not rewritten at runtime, we cannot have a
      generic `INSERT` with different tuples.
    - Because the queries are not rewritten at runtime, we cannot build
      one query with only the filters that matter for that queries. The
      two options are a combinatorial approach (a new query for every
      permutation) or a generic query using the pattern

          ```
            SELECT *
            FROM table
            WHERE (
                -- Can be read as:
                -- Match the filter 1 value if filter_1 != nil
                column_1 >= sqlc.narg('filter_1') OR
                sqlc.narg('filter_1') IS NULL
            ) AND (
                column_2 >= sqlc.narg('filter_2') OR
                sqlc.narg('filter_2') IS NULL
            ) ...
          ```

2023-07-10 17:53:29 -07:00

4.6 KiB

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