proto.ColArr[proto.ColFixedStr]

[jootd]

Hi, Why ColFixedStr struct does not implements Arrayable interface ?

[ernado]

Hi, you can still use NewArray:

v := proto.NewArray[[]byte](&proto.ColFixedStr{Size: 10})

v.Append([][]byte{
	bytes.Repeat([]byte("a"), 10),
	bytes.Repeat([]byte("b"), 10),
	bytes.Repeat([]byte("c"), 10),
})
v.Append([][]byte{
	bytes.Repeat([]byte("d"), 10),
	bytes.Repeat([]byte("e"), 10),
	bytes.Repeat([]byte("f"), 10),
})

[ernado]

Your type will be

proto.ColArr[[]byte]

Not

proto.ColArr[proto.ColFixedStr]

Like this:

// Array returns new Array(FixedString).
func (c *ColFixedStr) Array() *ColArr[[]byte] {
	return &ColArr[[]byte]{
		Data: c,
	}
}

[jootd]

Yes, I see . And it will work , If DB column type is Array(FixedString(64)) , am I right ?

[ernado]

This test is for Array(FixedString(10)):

ch-go/query_test.go

Lines 557 to 583 in 20b7501

	t.Run("ArrayFixedStr", func(t *testing.T) {
	t.Parallel()
	conn := Conn(t)
	require.NoError(t, conn.Do(ctx, Query{
	Body: "CREATE TABLE test_table (v Array(FixedString(10))) ENGINE = Memory",
	}), "create table")
	v := (&proto.ColFixedStr{Size: 10}).Array()
	v.Append([][]byte{
	bytes.Repeat([]byte("a"), 10),
	bytes.Repeat([]byte("b"), 10),
	bytes.Repeat([]byte("c"), 10),
	})
	v.Append([][]byte{
	bytes.Repeat([]byte("d"), 10),
	bytes.Repeat([]byte("e"), 10),
	bytes.Repeat([]byte("f"), 10),
	})
	require.NoError(t, conn.Do(ctx, Query{
	Body: "INSERT INTO test_table VALUES",
	Input: []proto.InputColumn{
	{Name: "v", Data: v},
	},
	}), "insert")
	})

Note that you still instantiate &proto.ColFixedStr{Size: 10} with Size: 10, ColFixedStr does not support size inference.

Also you can try ColRawOf[[10]byte] and it should work.