documentationcolimmutable¶
Type of operation: Metadata
Description¶
Mark resource columns as time immutable a.k.a. time-invariant, or not. Arguments are colname:bool where the bool value must be known at compile time. A time immutable column is a column that does not change for a given resource instance (as identified by the resource primary key). All key columns are implicitly immutable. Columns that are immutable can be stored and processed more efficiently. Beware: manually marking mutable columns as immutable can lead to wrong query results.
Usage¶
colimmutable col ...
Argument |
Type |
Required |
Multiple |
|---|---|---|---|
col |
expression |
Required |
Can be multiple |
Accelerable¶
colimmutable is always accelerable if the input is accelerable. A dataset that only uses accelerable verbs can be accelerated, making queries on the dataset respond faster.
Examples¶
colimmutable hostname:true, IP:false
Marks the column hostname as immutable, and the column IP as mutable.