Preserve long PostgreSQL index expressions

drizzle-kit/src/serializer/pgSerializer.ts

@@ -1605,7 +1605,7 @@ WHERE
         i.indisunique as is_unique,
         am.amname as method,
         ic.reloptions as with,
-        coalesce(a.attname, pg_get_indexdef(i.indexrelid, k.i, false)) AS column_name,
+        coalesce(a.attname::text, pg_get_indexdef(i.indexrelid, k.i, false)) AS column_name,
           CASE
         WHEN pg_get_expr(i.indexprs, i.indrelid) IS NOT NULL THEN 1
         ELSE 0

drizzle-kit/tests/pg-index-expressions.test.ts

@@ -0,0 +1,26 @@
+import { PGlite } from '@electric-sql/pglite';
+import { expect, test } from 'vitest';
+import type { DrizzlePgDB } from '../src/api';
+import { fromDatabase } from '../src/serializer/pgSerializer';
+
+const expression =
+	"lower(regexp_replace(TRIM(BOTH FROM description), '\\s+'::text, ' '::text, 'g'::text))";
+
+test('preserves index expressions longer than PostgreSQL names', async () => {
+	const client = new PGlite();
+	await client.exec(`
+		CREATE TABLE search_records (description text);
+		CREATE INDEX search_records_description_idx
+			ON search_records (${expression});
+	`);
+
+	const db = {
+		query: async (sql: string, params?: unknown[]) => (await client.query(sql, params)).rows,
+	} as DrizzlePgDB;
+	const schema = await fromDatabase(db, () => true, ['public']);
+
+	expect(new TextEncoder().encode(expression)).toHaveLength(85);
+	expect(
+		schema.tables['public.search_records']!.indexes.search_records_description_idx!.columns[0]!.expression,
+	).toBe(expression);
+});