NULL values are stored with only three bytes, if value compression is active. You can expect space savings especially for numeric values.

如果激活值压缩，则null值的存储只需3个字节。

youdao

NULL values are stored with only three bytes, if value compression is active. You can expect space savings especially for numeric values.

如果激活值压缩，则null值的存储只需3个字节。

youdao