fix(plugin-drizzle): keyset pagination drops the equality clause for Date columns

[hayes]

Follow up to #1651, reported from a run against Postgres 17.11.

What breaks

Ordering a connection by a timestamp column returns the wrong rows. With 12 rows sharing a millisecond and { createdAt: 'desc', id: 'desc' }, first: 3 walks all 12 instead of 3.

The keyset filter should be:

created_at < $1 OR (created_at = $2 AND id < $3)

What actually reached Postgres:

created_at < $1 OR id < $2

Those are two unrelated conditions, not a keyset comparison. Rows outside the page come back, and a newer row with a smaller id is returned as though it were older.

Cause

The equality half was written with drizzle's { column: value } shorthand. relationsFieldFilterToSQL treats any object value as a nested filter rather than a comparison:

if (typeof filter !== "object" || is(filter, Placeholder)) return eq(column, filter);
const entries = Object.entries(filter);
if (!entries.length) return void 0;

Object.entries(new Date()) is [], so the clause returns undefined and disappears. No error. null hit the same branch and threw, which is why it was already special cased; Date fails silently instead.

This only became reachable when compound cursors started carrying tagged values. Before that, JSON serialization handed the filter a date string, and a string is not an object, so drizzle built the comparison correctly by accident. Single column orderings never emit an equality clause, and expression orderings build their SQL through RAW, so neither path was affected.

Fix

Name the operator instead of relying on the shorthand:

-if (operator === 'eq') {
-  return isNullish ? { [entry.key]: { isNull: true } } : { [entry.key]: value };
+if (operator === 'eq' && isNullish) {
+  return { [entry.key]: { isNull: true } };
 }
 return { [entry.key]: { [operator]: value } };

The shorthand is gone entirely rather than special cased for Date, so bytea, array, and json columns cannot reach it either. Arrays would have crashed on operators['0'] rather than compiling away.

Tests

Two tests in cursor-values.test.ts build a filter through drizzleCursorConnectionQuery and compile it with .toSQL(). Asserting the shape of the filter object would have passed on the broken code, since the object looked right and drizzle discarded it. Verified red before the fix:

- expected: /"created_at" < \$1.*"created_at" = \$2.*"id" < \$3/
- actual:   where (("d0"."created_at" < $1) or ("d0"."id" < $2))

The 16 unrelated test file failures in the drizzle suite are pre existing, from @pothos/plugin-errors resolving against an unbuilt workspace. Same count before and after this change.

🤖 Generated with Claude Code

https://claude.ai/code/session_01YHUkipCNUgbk6gsm38dkAb

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Project	Deployment	Actions	Updated (UTC)
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commit: 6c8bae4