import SQL UNION into BQL

Description

This issue does not include a description.

Contributor guide

Tech stack

pythonsql

Domain

database

Issue type

feature

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

3

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

1-2 days

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

stale

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

unclear

Prerequisites

SQL UNION syntaxBQL parser architecturePython

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

25

Research direction

Start by exploring the Bayeslite codebase to locate the BQL parser, likely in a file such as bql parser.py. Understand how existing SQL statements like SELECT are parsed and executed. The single comment on the issue may provide additional hints. Then design and implement UNION support by following the pattern of other set operations. Examine how similar projects implement UNION to guide the approach.