The premise behind ADC is to automatically create a representative compression dictionary based on sampling a small subset of table data.
ADC的前提是根据抽样的一小部分表数据自动创建一个代表性的压缩字典。
2
Figure 4 shows a rule with bindings that involve columns coming from more than one table, which causes the sampling to be done after the join operation.
图4展示了具有绑定的规则，它涉及来自多个表的列，这导致了在连接操作之后进行抽样。
3
Check the sampling plan (see Table 4) created from Table 3.