[lee3Q]

Description

extract_tables handled the first table in FROM a, b differently from a single table. In the comma-separated branch of extract_table_identifiers, an IdentifierList item read the name, schema and alias straight from sqlparse (get_real_name, get_parent_name, get_alias) instead of using parse_identifier, which the single-table path uses to normalize them. Unquoted upper-case names such as USERS therefore kept their case in a list but were folded to users as a single table, so SELECT from USERS, ORDERS completed no columns while SELECT from users, orders did.

This calls parse_identifier in that branch, so both paths return the same TableReference. The change is 3 lines in pgcli/packages/parseutils/tables.py.

Tests: extract_tables for a comma list equals the combined results for each table alone (plain and PUBLIC.-qualified upper-case names, and quoted identifiers), and column completion for upper-case and quoted names in a comma list matches the single-table case (text and display_meta).

Behavior note: quoted names in a comma list now go through the same normalization as the single-table and CROSS JOIN paths, so the reference text for them can differ from what the comma path returned before.

Checklist

• I've added this contribution to the changelog.rst.
• I've added my name to the AUTHORS file (or it's already there).
• I installed pre-commit hooks (pip install pre-commit && pre-commit install). I did not install the hooks. I ran ruff check and ruff format --check (ruff 0.14.10, the version pinned in .pre-commit-config.yaml) on the repository and both pass.
• I verified that my changes work as expected (this may include manually testing them in your local environment, or in other available environments). I ran pytest tests on Linux with Python 3.10.12: without the change, the new tests give 38 failures; with it, 2751 passed, 134 skipped, 1 xfailed. Tests that need a PostgreSQL server, the behave tests and the CI matrix were not run.
• Please squash merge this pull request (uncheck if you'd like us to merge as multiple commits)