脚本
pt = point(1 2 3 4, 1 2 3 4) compress(pt,"delta")
报错
compress(pt, "delta") => Delta compression only supports integral and temporal data
原因分析:虽然构造point类型时,传入的是整形,但point底层的存储是浮点型,delta of delta 压缩不支持对浮点型数据进行压缩。