KQL Playground

Unsupported tabular operators

• parse / parse-where / parse-regex
• mv-apply
• make-series
• evaluate (and all plugins: bag_unpack, pivot, etc.)
• render — no chart output
• fork / facet
• datatable / print
• sample / sample-distinct
• lookup / scan / partition / invoke

String & filter operators

• has uses substring match, not KQL word-boundary semantics
• matches regex — autocomplete only, not transpiled
• in~ / !in~ — case-insensitive variants not supported
• has_any() / has_all() — not implemented
• has_cs / contains_cs / startswith_cs / endswith_cs — autocomplete only
• between — keyword only, not transpiled

Expressions & types

• case() — autocomplete only, not transpiled
• iff() / iif() with comma-containing sub-expressions breaks due to regex parsing
• Dynamic type access: d["key"] / d.key notation not supported
• let function definitions (let f = (x:int) { … }) not supported

Input & workspace

• CSV only — no TSV, JSON Lines, Parquet, or Excel
• One file per session; no persistent multi-table workspace

Operators listed in autocomplete but not transpiled will throw an "Unsupported operator" error at run time.