serialize operator
Marks that the order of the input row set is safe to use for window functions.
The operator has a declarative meaning. It marks the input row set as serialized (ordered), so that window functions can be applied to it.
T | serialize rn=row_number()
Syntax
serialize [Name1 = Expr1 [, Name2 = Expr2]...]
- The Name/Expr pairs are similar to those pairs in the extend operator.
Example
Traces
| where ActivityId == "479671d99b7b"
| serialize
Traces
| where ActivityId == "479671d99b7b"
| serialize rn = row_number()
The output row set of the following operators is marked as serialized.
range, sort, order, top, top-hitters, getschema.
The output row set of the following operators is marked as non-serialized.
sample, sample-distinct, distinct, join, top-nested, count, summarize, facet, mv-expand, evaluate, reduce by, make-series
All other operators preserve the serialization property. If the input row set is serialized, then the output row set is also serialized.
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