DL

Dmitry Leontyev

Software Engineer, Storage Engine

Author's articles

Your Elasticsearch field mappings are lying to you — METRICS_INFO and TS_INFO tell the truth
ES|QL

April 29, 2026

Your Elasticsearch field mappings are lying to you — METRICS_INFO and TS_INFO tell the truth

Two new Elasticsearch ES|QL commands that turn time series discovery into a single-line query: METRICS_INFO and TS_INFO tell you which metrics and series actually exist in your data, not just what the mapping declares.

DL
By: Dmitry Leontyev

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