Multiple Column Functions
NOTE
Verification Status: Tested and Verified against rekuiper engine with live telemetry stream load on 2026-10-01 17:57:05 UTC.
Scorecard: 1 Verified, 0 Unsupported, 0 Broken:
- Verified (1):
changed_cols.
A multiple-column function returns multiple columns in a single invocation. In contrast, standard scalar functions return a single column value for each input row.
You can use multiple-column functions only in the SELECT clause of a query.
CHANGED_COLS
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changed_cols(prefix, ignoreNull, colA, colB)Returns columns whose values changed since the previous execution, with names prepended by prefix. Refer to changed_cols for complete reference details and examples.