test: add e2e test that was failing on main but now works

Signed-off-by: Manan Gupta <[email protected]>

go/test/endtoend/vtgate/queries/misc/misc_test.go

@@ -352,3 +352,22 @@ func TestTransactionModeVar(t *testing.T) {
 		})
 	}
 }
+
+// TestAliasesInOuterJoinQueries tests that aliases work in queries that have outer join clauses.
+func TestAliasesInOuterJoinQueries(t *testing.T) {
+	utils.SkipIfBinaryIsBelowVersion(t, 20, "vtgate")
+
+	mcmp, closer := start(t)
+	defer closer()
+
+	// Insert data into the 2 tables
+	mcmp.Exec("insert into t1(id1, id2) values (1,2), (42,5), (5, 42)")
+	mcmp.Exec("insert into tbl(id, unq_col, nonunq_col) values (1,2,3), (2,5,3), (3, 42, 2)")
+
+	// Check that the select query works as intended and then run it agin verifying the column names as well.
+	mcmp.AssertMatches("select t1.id1 as t0, t1.id1 as t1, tbl.unq_col as col from t1 left outer join tbl on t1.id2 = tbl.nonunq_col", `[[INT64(1) INT64(1) INT64(42)] [INT64(5) INT64(5) NULL] [INT64(42) INT64(42) NULL]]`)
+	mcmp.ExecWithColumnCompare("select t1.id1 as t0, t1.id1 as t1, tbl.unq_col as col from t1 left outer join tbl on t1.id2 = tbl.nonunq_col")
+
+	mcmp.AssertMatches("select t1.id1 as t0, t1.id1 as t1, tbl.unq_col as col from t1 left outer join tbl on t1.id2 = tbl.nonunq_col order by t1.id2 limit 2", `[[INT64(1) INT64(1) INT64(42)] [INT64(42) INT64(42) NULL]]`)
+	mcmp.ExecWithColumnCompare("select t1.id1 as t0, t1.id1 as t1, tbl.unq_col as col from t1 left outer join tbl on t1.id2 = tbl.nonunq_col order by t1.id2 limit 2")
+}