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fix: losing aliasMap in 'partial' subqueries #2405

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merged 3 commits into from
May 17, 2023

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falkenhawk
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@falkenhawk falkenhawk commented Apr 22, 2023

ported from ovos#13

This fixes an issue with 'partial' subqueries that they lose aliasMap from q._context (QueryBuilder's "internal context") while generating nested where sql part. QueryBuilder.subqueryOf() used to grab context from "parent" query, but it doesn't anymore. (since 2019-02-13) 524e0be

In our case, we were getting SQL errors where alias was necessary to make it work, but it was missing

ER_NON_UNIQ_ERROR: Column 'event_id' in IN/ALL/ANY subquery is ambiguous

Basically reintroducing what was deleted in 524e0be (to fix #1205) but wrap merging context with a condition that it should only apply to "partial" subqueries + reverse the sequence that isPartial() is set before subqueryOf()

This fixes an issue with 'partial' suibqueries that they lose `aliasMap` from `q._context`
(QueryBuilder's "internal context") while generating nested `where` sql part.
`QueryBuilder.subqueryOf()` used to grab context from "parent" query, but it doesn't anymore. (since 2019-02-13)
Vincit@524e0be

Basically reintroducing what was deleted in Vincit@524e0be but wrap merging context with a condition that it should only apply to "partial" subqueries + reverse the sequence that `isPartial()` is set before `subqueryOf()`
lib/utils/objectUtils.js Outdated Show resolved Hide resolved
Co-authored-by: Elan Ruusamäe <glen@pld-linux.org>
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lehni commented Apr 24, 2023

@falkenhawk great thanks! this looks reasonable. Adding a test would be good to prevent a future regression?

with error: `no such column: model2.model2_prop2`
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@lehni I've added a test which fails with

DBError: select `m1`.* from `model2` as `m1` where (`id_col` = (select `m2`.`id_col` from `model2` as `m2` where `m2`.`model2_prop2` = `model2`.`model2_prop2`)) order by `m1`.`model2_prop2` asc - SQLITE_ERROR: no such column: model2.model2_prop2

on the master branch.

Perhaps the ${query.tableRefFor(query.modelClass())}.model2_prop2 reference look weird, but it is useful e.g. for modifiers which add a where condition with subquery, referencing a column from parent query, but the alias which parent query uses is not known and cannot be hardcoded in the modifier.

@lehni lehni merged commit af48971 into Vincit:master May 17, 2023
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Subqueries break upgrading from 1.4.0 to 1.5.3
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