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- [[esql-is_null]]
- === `IS_NULL`
- Returns a boolean that indicates whether its input is `null`.
- [source.merge.styled,esql]
- ----
- include::{esql-specs}/docs.csv-spec[tag=isNull]
- ----
- [%header.monospaced.styled,format=dsv,separator=|]
- |===
- include::{esql-specs}/docs.csv-spec[tag=isNull-result]
- |===
- Combine this function with `NOT` to filter out any `null` data:
- [source.merge.styled,esql]
- ----
- include::{esql-specs}/docs.csv-spec[tag=notIsNull]
- ----
- [%header.monospaced.styled,format=dsv,separator=|]
- |===
- include::{esql-specs}/docs.csv-spec[tag=notIsNull-result]
- |===
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