should be it

external/duckdb/test/optimizer/index_optimizer.test

@@ -0,0 +1,32 @@
+# name: test/optimizer/index_optimizer.test
+# description: Test Optimizer uses indexes on point queries
+# group: [optimizer]
+
+statement ok
+CREATE TABLE integers(i INTEGER, j INTEGER);
+
+statement ok
+INSERT INTO integers VALUES (1, 1), (2, 2), (3, 3);
+
+# Test single indexed column.
+
+statement ok
+CREATE UNIQUE INDEX i_index ON integers(i);
+
+query II
+EXPLAIN ANALYZE SELECT i, j FROM integers WHERE i = 1;
+----
+analyzed_plan	<REGEX>:.*Type: Index Scan.*
+
+query II
+SELECT i, j FROM integers WHERE i = 1;
+----
+1	1
+
+statement error
+INSERT INTO integers VALUES (1, 1);
+----
+<REGEX>:Constraint Error.*violates unique constraint.*
+
+statement ok
+DROP INDEX i_index;