Add pgtype.Map.SQLScanner

This enables compatibility with database/sql for types that cannot
implement Scan themselves.

stdlib/sql_test.go

@@ -15,6 +15,7 @@ import (
 
 	"github.com/jackc/pgx/v5"
 	"github.com/jackc/pgx/v5/pgconn"
+	"github.com/jackc/pgx/v5/pgtype"
 	"github.com/jackc/pgx/v5/stdlib"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -373,6 +374,37 @@ func TestConnSimpleSlicePassThrough(t *testing.T) {
 	})
 }
 
+func TestConnQueryScanArray(t *testing.T) {
+	testWithAllQueryExecModes(t, func(t *testing.T, db *sql.DB) {
+		m := pgtype.NewMap()
+
+		var a []int64
+		err := db.QueryRow("select '{1,2,3}'::bigint[]").Scan(m.SQLScanner(&a))
+		require.NoError(t, err)
+		assert.Equal(t, []int64{1, 2, 3}, a)
+	})
+}
+
+func TestConnQueryScanRange(t *testing.T) {
+	testWithAllQueryExecModes(t, func(t *testing.T, db *sql.DB) {
+		m := pgtype.NewMap()
+
+		var r pgtype.Range[pgtype.Int4]
+		err := db.QueryRow("select int4range(1, 5)").Scan(m.SQLScanner(&r))
+		require.NoError(t, err)
+		assert.Equal(
+			t,
+			pgtype.Range[pgtype.Int4]{
+				Lower:     pgtype.Int4{Int32: 1, Valid: true},
+				Upper:     pgtype.Int4{Int32: 5, Valid: true},
+				LowerType: pgtype.Inclusive,
+				UpperType: pgtype.Exclusive,
+				Valid:     true,
+			},
+			r)
+	})
+}
+
 // Test type that pgx would handle natively in binary, but since it is not a
 // database/sql native type should be passed through as a string
 func TestConnQueryRowPgxBinary(t *testing.T) {