DecodeIndexKeyToCols decodes an index key into the idx'th position of the provided slices of colexec.Vecs.

DecodeKeyValsToCols decodes the values that are part of the key, writing the result to the idx'th slot of the input slice of colexec.Vecs.

DecodeTableValueToCol decodes a value encoded by EncodeTableValue, writing the result to the idx'th position of the input exec.Vec.

UnmarshalColumnValueToCol decodes the value from a roachpb.Value using the type expected by the column, writing into the input Vec at the given row idx.