table/requests/
semantic.rs

1// Copyright 2023 Greptime Team
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//     http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15//! Table semantic layer vocabulary.
16//!
17//! A thin layer of semantic metadata attached to a table via `table_options`, so
18//! machine consumers (LLM agents, alert/dashboard builders, MCP servers, ETL) can
19//! align a table with the observability concept it stands for without guessing
20//! from column names. See `docs/rfcs/2026-05-28-table-semantic-layer.md`.
21//!
22//! The vocabulary is intentionally small: a key earns its place only when it
23//! records something a consumer cannot cheaply and reliably recover from the
24//! schema/data itself. Keys whose value is already in the metric name by
25//! convention, is a constant, or duplicates an existing column are deliberately
26//! omitted rather than stamped for completeness.
27//!
28//! All public keys share the [`SEMANTIC_PREFIX`] namespace and are string-valued.
29//! [`is_semantic_option_key`] gates them through
30//! [`crate::requests::validate_table_option`], so they are accepted both on the
31//! ingestion auto-create path and on explicit `CREATE TABLE ... WITH (...)` DDL.
32
33use common_catalog::consts::{
34    RESOURCE_ATTRIBUTES_COLUMN, SCOPE_ATTRIBUTES_COLUMN, SPAN_ATTRIBUTES_COLUMN,
35};
36use datatypes::prelude::ConcreteDataType;
37use datatypes::schema::{ColumnSchema, Schema};
38
39use crate::requests::TABLE_DATA_MODEL_TRACE_V2;
40
41/// Reserved prefix for every public semantic table-option key.
42pub const SEMANTIC_PREFIX: &str = "greptime.semantic.";
43
44/// Internal `QueryContext` extension key carrying the per-table semantic index
45/// (a `{table_name -> {semantic_key: value}}` JSON blob) from the ingestion
46/// encode path to the auto-create site. Deliberately OUTSIDE [`SEMANTIC_PREFIX`]
47/// so it is not a valid table option and never leaks into a table's options.
48pub const SEMANTIC_PER_TABLE_INDEX_KEY: &str = "greptime.internal.semantic.per_table_index";
49
50// ---- Common keys (all signals) ----
51
52/// Information-schema visibility: `catalog` for providers that filter rows to
53/// their catalog, or `global` for catalog-independent data. Only registered
54/// system-table metadata is trusted for authorization.
55pub const SEMANTIC_TABLE_SCOPE: &str = "greptime.semantic.table_scope";
56
57/// Signal kind: one of [`SIGNAL_TYPE_TRACE`] / [`SIGNAL_TYPE_LOG`] /
58/// [`SIGNAL_TYPE_METRIC`] / [`SIGNAL_TYPE_EVENT`].
59pub const SEMANTIC_SIGNAL_TYPE: &str = "greptime.semantic.signal_type";
60/// Ingestion ecosystem, e.g. [`SOURCE_OPENTELEMETRY`] / [`SOURCE_PROMETHEUS`].
61pub const SEMANTIC_SOURCE: &str = "greptime.semantic.source";
62/// Source protocol version, e.g. Prometheus remote write `1.0` / `2.0`.
63pub const SEMANTIC_SOURCE_VERSION: &str = "greptime.semantic.source_version";
64/// Internal ingestion pipeline / data model, e.g. `greptime_trace_v1`. The
65/// signal-agnostic successor to the engine-specific `table_data_model` option.
66pub const SEMANTIC_PIPELINE: &str = "greptime.semantic.pipeline";
67
68// ---- Trace keys ----
69
70/// Semantic-conventions version the rows conform to (e.g. the OTel schema URL),
71/// or [`SEMANTIC_VALUE_UNKNOWN`] / [`SEMANTIC_VALUE_MIXED`] when not single-valued.
72pub const SEMANTIC_TRACE_CONVENTIONS: &str = "greptime.semantic.trace.conventions";
73
74// ---- Metric keys ----
75
76/// Instrument kind: `counter` / `gauge` / `histogram` / `summary` /
77/// `updown_counter` / `gauge_histogram` / `info` / `stateset`.
78pub const SEMANTIC_METRIC_TYPE: &str = "greptime.semantic.metric.type";
79/// UCUM unit, e.g. `s`, `By`, `{request}`. Discarded by the row encoders, so it
80/// is unrecoverable once ingested.
81pub const SEMANTIC_METRIC_UNIT: &str = "greptime.semantic.metric.unit";
82/// Catalog-level `cumulative` / `delta` / `mixed` description for OTLP metrics.
83/// Per-series query behavior is determined from stored row identity instead.
84pub const SEMANTIC_METRIC_TEMPORALITY: &str = "greptime.semantic.metric.temporality";
85/// [`METADATA_QUALITY_DECLARED`] when the protocol stated the type, or
86/// [`METADATA_QUALITY_INFERRED`] when guessed from a name suffix.
87pub const SEMANTIC_METRIC_METADATA_QUALITY: &str = "greptime.semantic.metric.metadata_quality";
88/// Pre-translation OTel name when the table name was Prometheus-ised; the key a
89/// consumer uses to look the metric up in the OTel semantic conventions.
90pub const SEMANTIC_METRIC_ORIGINAL_NAME: &str = "greptime.semantic.metric.original_name";
91
92// ---- Entity keys (open sub-namespace) ----
93
94/// Reserved prefix for the entity-identity sub-namespace:
95/// `greptime.semantic.entity.<type>.{id|descriptive|scope}`. Unlike the rest of
96/// the vocabulary (a closed whitelist), entity types are open-ended (`service`,
97/// `host`, `k8s.pod`, `process`, `agent`, custom, ...), so keys here are validated
98/// by prefix + shape rather than membership. See
99/// `docs/rfcs/2026-06-25-entity-relationships-and-graph-query.md`.
100pub const SEMANTIC_ENTITY_PREFIX: &str = "greptime.semantic.entity.";
101
102/// The well-known entity-identity key auto-stamped on OTLP trace tables; its value
103/// is the `service_name` tag column, declaring the logical `service` entity.
104pub const SEMANTIC_ENTITY_SERVICE_ID: &str = "greptime.semantic.entity.service.id";
105
106/// The role a set of columns plays for an entity: `id` (identifying
107/// attributes), `descriptive`, or `scope`. Columns may be tags or fields; DDL
108/// validation only requires that they exist and render as stable strings
109/// ([`has_stable_string_form`]).
110#[derive(Debug, Clone, Copy, PartialEq, Eq)]
111pub enum EntityRole {
112    /// Identifying columns. Their **order is part of the identity**: the
113    /// entity id is their values joined in the declared order, so two tables
114    /// naming the same entity must list them the same way (broad to narrow)
115    /// or they name two entities.
116    Id,
117    Descriptive,
118    Scope,
119}
120
121impl EntityRole {
122    fn parse(role: &str) -> Option<Self> {
123        match role {
124            "id" => Some(EntityRole::Id),
125            "descriptive" => Some(EntityRole::Descriptive),
126            "scope" => Some(EntityRole::Scope),
127            _ => None,
128        }
129    }
130}
131
132// ---- Value constants ----
133
134pub const SIGNAL_TYPE_TRACE: &str = "trace";
135pub const SIGNAL_TYPE_LOG: &str = "log";
136pub const SIGNAL_TYPE_METRIC: &str = "metric";
137pub const SIGNAL_TYPE_EVENT: &str = "event";
138
139pub const SOURCE_OPENTELEMETRY: &str = "opentelemetry";
140pub const SOURCE_PROMETHEUS: &str = "prometheus";
141pub const SOURCE_INFLUXDB: &str = "influxdb";
142pub const SOURCE_OPENTSDB: &str = "opentsdb";
143pub const SOURCE_LOKI: &str = "loki";
144pub const SOURCE_ELASTICSEARCH: &str = "elasticsearch";
145
146pub const METADATA_QUALITY_DECLARED: &str = "declared";
147pub const METADATA_QUALITY_INFERRED: &str = "inferred";
148
149pub const METRIC_TEMPORALITY_CUMULATIVE: &str = "cumulative";
150pub const METRIC_TEMPORALITY_DELTA: &str = "delta";
151
152/// Sentinel for a key that cannot be determined at stamp time.
153pub const SEMANTIC_VALUE_UNKNOWN: &str = "unknown";
154/// Sentinel for a single-valued key that saw conflicting sources.
155pub const SEMANTIC_VALUE_MIXED: &str = "mixed";
156
157/// Every recognised public semantic table-option key. The set is a closed
158/// whitelist: keys under [`SEMANTIC_PREFIX`] that are not listed here are rejected,
159/// so an unknown key like `greptime.semantic.unknown_key` does not silently land
160/// in a table's options. Adding a key to the vocabulary means adding it here.
161pub const SEMANTIC_OPTION_KEYS: &[&str] = &[
162    SEMANTIC_TABLE_SCOPE,
163    SEMANTIC_SIGNAL_TYPE,
164    SEMANTIC_SOURCE,
165    SEMANTIC_SOURCE_VERSION,
166    SEMANTIC_PIPELINE,
167    SEMANTIC_TRACE_CONVENTIONS,
168    SEMANTIC_METRIC_TYPE,
169    SEMANTIC_METRIC_UNIT,
170    SEMANTIC_METRIC_TEMPORALITY,
171    SEMANTIC_METRIC_METADATA_QUALITY,
172    SEMANTIC_METRIC_ORIGINAL_NAME,
173];
174
175/// Returns true if `ty` is a syntactically valid entity type, e.g. `service`,
176/// `host`, `k8s.pod`, `service.instance`. An entity type is one or more
177/// dot-separated segments, each a non-empty `[a-z0-9_]+` token. The dotted form
178/// carries the two-entity-layer convention (`service` vs `service.instance`).
179fn is_valid_entity_type(ty: &str) -> bool {
180    !ty.is_empty()
181        && ty.split('.').all(|seg| {
182            !seg.is_empty()
183                && seg
184                    .bytes()
185                    .all(|b| b.is_ascii_lowercase() || b.is_ascii_digit() || b == b'_')
186        })
187}
188
189/// Parses a well-formed entity-identity option key of the shape
190/// `greptime.semantic.entity.<type>.{id|descriptive|scope}` into
191/// `(entity_type, role)`. The `<type>` may itself contain dots; the role is the
192/// final dot-separated segment. This is the single parser of the key format —
193/// DDL validation and the read-time derivation both go through it.
194pub fn parse_entity_option_key(key: &str) -> Option<(&str, EntityRole)> {
195    let rest = key.strip_prefix(SEMANTIC_ENTITY_PREFIX)?;
196    let (ty, role) = rest.rsplit_once('.')?;
197    if !is_valid_entity_type(ty) {
198        return None;
199    }
200    Some((ty, EntityRole::parse(role)?))
201}
202
203/// Returns true if `key` is a well-formed entity-identity option key.
204pub fn is_entity_option_key(key: &str) -> bool {
205    parse_entity_option_key(key).is_some()
206}
207
208/// Resolves a Trace V2 entity reference to a JSON2 root and a literal attribute key.
209/// Everything after the first dot belongs to the key, matching Trace V1's
210/// flattened column names. Existing physical columns take precedence.
211pub fn trace_v2_attribute<'a>(
212    schema: &Schema,
213    data_model: Option<&str>,
214    column: &'a str,
215) -> Option<(&'a str, &'a str)> {
216    if data_model != Some(TABLE_DATA_MODEL_TRACE_V2)
217        || schema.column_schema_by_name(column).is_some()
218    {
219        return None;
220    }
221    let (root, key) = column.split_once('.')?;
222    (!key.is_empty()
223        && schema
224            .column_schema_by_name(root)
225            .is_some_and(is_v2_attribute_column))
226    .then_some((root, key))
227}
228
229fn is_v2_attribute_column(schema: &ColumnSchema) -> bool {
230    matches!(
231        schema.name.as_str(),
232        RESOURCE_ATTRIBUTES_COLUMN | SCOPE_ATTRIBUTES_COLUMN | SPAN_ATTRIBUTES_COLUMN
233    ) && schema.data_type.is_json2()
234}
235
236/// Returns true if a column of `data_type` renders as a stable string — the
237/// requirement for entity id/descriptive/scope columns. The read-time
238/// derivation casts them to strings, so a type without a stable string form
239/// would fail only when the graph is scanned; DDL validation rejects it up
240/// front instead.
241pub fn has_stable_string_form(data_type: &ConcreteDataType) -> bool {
242    !matches!(
243        data_type,
244        ConcreteDataType::Binary(_)
245            | ConcreteDataType::Json(_)
246            | ConcreteDataType::Vector(_)
247            | ConcreteDataType::List(_)
248            | ConcreteDataType::Struct(_)
249            | ConcreteDataType::Dictionary(_)
250            | ConcreteDataType::Null(_)
251    )
252}
253
254/// Tokenizes an entity option's comma-separated column list (trimmed, empty
255/// tokens dropped). [`validate_semantic_option`] rejects empty tokens at DDL
256/// time, so readers only ever drop what validation already refused.
257pub fn parse_entity_columns(value: &str) -> Vec<String> {
258    value
259        .split(',')
260        .map(str::trim)
261        .filter(|column| !column.is_empty())
262        .map(String::from)
263        .collect()
264}
265
266/// Returns true if `key` is a recognised semantic table-option key.
267///
268/// Two acceptance rules: membership in the closed [`SEMANTIC_OPTION_KEYS`]
269/// whitelist, OR the open entity sub-namespace ([`is_entity_option_key`], validated
270/// by prefix + shape). Everything else under [`SEMANTIC_PREFIX`] is rejected, and
271/// the internal [`SEMANTIC_PER_TABLE_INDEX_KEY`] (outside the prefix) never matches.
272pub fn is_semantic_option_key(key: &str) -> bool {
273    SEMANTIC_OPTION_KEYS.contains(&key) || is_entity_option_key(key)
274}
275
276/// Validates a `greptime.semantic.*` option's `value` against its allowed domain.
277///
278/// Open-value keys (unit, original_name, pipeline, conventions) accept any
279/// non-empty string. Closed-domain keys accept a fixed set, plus the `unknown`
280/// sentinel, plus `mixed` for the keys where one long-lived table can
281/// legitimately see multiple values. Entity keys ([`is_entity_option_key`]) take a
282/// comma-separated column-name list (each token non-empty); column existence and
283/// the stable-string-form rule for entity columns are enforced later against
284/// the table schema at DDL time, not here. Keys that are neither whitelisted nor a well-formed entity key
285/// are rejected.
286pub fn validate_semantic_option(key: &str, value: &str) -> bool {
287    if is_entity_option_key(key) {
288        return !value.is_empty() && value.split(',').all(|column| !column.trim().is_empty());
289    }
290    match key {
291        SEMANTIC_TABLE_SCOPE => matches!(value, "catalog" | "global"),
292        SEMANTIC_PIPELINE
293        | SEMANTIC_SOURCE_VERSION
294        | SEMANTIC_METRIC_UNIT
295        | SEMANTIC_METRIC_ORIGINAL_NAME
296        | SEMANTIC_TRACE_CONVENTIONS => !value.is_empty(),
297
298        SEMANTIC_SIGNAL_TYPE => matches!(value, "trace" | "log" | "metric" | "event" | "unknown"),
299        SEMANTIC_SOURCE => matches!(
300            value,
301            "opentelemetry"
302                | "prometheus"
303                | "influxdb"
304                | "opentsdb"
305                | "elasticsearch"
306                | "loki"
307                | "custom"
308                | "mixed"
309                | "unknown"
310        ),
311        SEMANTIC_METRIC_TYPE => matches!(
312            value,
313            "counter"
314                | "gauge"
315                | "histogram"
316                | "summary"
317                | "updown_counter"
318                | "gauge_histogram"
319                | "info"
320                | "stateset"
321                | "mixed"
322                | "unknown"
323        ),
324        SEMANTIC_METRIC_TEMPORALITY => {
325            matches!(
326                value,
327                METRIC_TEMPORALITY_CUMULATIVE | METRIC_TEMPORALITY_DELTA | "mixed" | "unknown"
328            )
329        }
330        SEMANTIC_METRIC_METADATA_QUALITY => matches!(value, "declared" | "inferred" | "unknown"),
331
332        _ => false,
333    }
334}
335
336#[cfg(test)]
337mod tests {
338    use datatypes::types::JsonType;
339
340    use super::*;
341
342    #[test]
343    fn test_trace_v2_attribute_references() {
344        let schema = Schema::new(vec![
345            ColumnSchema::new(
346                RESOURCE_ATTRIBUTES_COLUMN,
347                ConcreteDataType::Json(JsonType::null()),
348                true,
349            ),
350            ColumnSchema::new(
351                SCOPE_ATTRIBUTES_COLUMN,
352                ConcreteDataType::string_datatype(),
353                true,
354            ),
355            ColumnSchema::new(
356                "resource_attributes.physical",
357                ConcreteDataType::string_datatype(),
358                true,
359            ),
360        ]);
361        let model = Some(TABLE_DATA_MODEL_TRACE_V2);
362        for key in ["host.name", "host..name", "host[0]", "host.*", r#"a"b\c.d"#] {
363            let column = format!("resource_attributes.{key}");
364            assert_eq!(
365                trace_v2_attribute(&schema, model, &column),
366                Some((RESOURCE_ATTRIBUTES_COLUMN, key))
367            );
368        }
369        for column in [
370            "resource_attributes",
371            "resource_attributes.",
372            "scope_attributes.name",
373            "span_attributes.name",
374            "resource_attributes.physical",
375            "missing.key",
376        ] {
377            assert_eq!(trace_v2_attribute(&schema, model, column), None, "{column}");
378        }
379        for model in [None, Some(crate::requests::TABLE_DATA_MODEL_TRACE_V1)] {
380            assert_eq!(
381                trace_v2_attribute(&schema, model, "resource_attributes.host.name"),
382                None
383            );
384        }
385    }
386
387    #[test]
388    fn test_is_semantic_option_key() {
389        assert!(is_semantic_option_key(SEMANTIC_SIGNAL_TYPE));
390        assert!(is_semantic_option_key(SEMANTIC_METRIC_TYPE));
391        assert!(is_semantic_option_key(SEMANTIC_PIPELINE));
392
393        // Unknown keys under the prefix are not whitelisted.
394        assert!(!is_semantic_option_key("greptime.semantic.future.key"));
395        assert!(!is_semantic_option_key("greptime.semantic.unknown_key"));
396        // Keys cut from the vocabulary are no longer accepted.
397        assert!(!is_semantic_option_key(
398            "greptime.semantic.metric.monotonic"
399        ));
400        assert!(!is_semantic_option_key(
401            "greptime.semantic.resource.attributes_dropped"
402        ));
403        // Near-misses must not match.
404        assert!(!is_semantic_option_key("greptime.semanticx"));
405        assert!(!is_semantic_option_key("semantic.signal_type"));
406        assert!(!is_semantic_option_key("table_data_model"));
407        // The internal transport key must never be treated as a table option.
408        assert!(!is_semantic_option_key(SEMANTIC_PER_TABLE_INDEX_KEY));
409    }
410
411    #[test]
412    fn test_validate_semantic_option() {
413        // Enum keys reject out-of-domain values.
414        assert!(validate_semantic_option(SEMANTIC_TABLE_SCOPE, "catalog"));
415        assert!(validate_semantic_option(SEMANTIC_TABLE_SCOPE, "global"));
416        assert!(!validate_semantic_option(SEMANTIC_TABLE_SCOPE, "cluster"));
417        assert!(!validate_semantic_option(SEMANTIC_TABLE_SCOPE, "unknown"));
418        assert!(!validate_semantic_option(SEMANTIC_TABLE_SCOPE, ""));
419        assert!(validate_semantic_option(SEMANTIC_SIGNAL_TYPE, "metric"));
420        assert!(!validate_semantic_option(SEMANTIC_SIGNAL_TYPE, "spans"));
421        assert!(validate_semantic_option(SEMANTIC_METRIC_TYPE, "counter"));
422        assert!(validate_semantic_option(SEMANTIC_METRIC_TYPE, "mixed"));
423        assert!(!validate_semantic_option(SEMANTIC_METRIC_TYPE, "bogus"));
424
425        // Sentinels and open values.
426        assert!(validate_semantic_option(
427            SEMANTIC_METRIC_TEMPORALITY,
428            "unknown"
429        ));
430        assert!(validate_semantic_option(SEMANTIC_METRIC_UNIT, "By"));
431        assert!(!validate_semantic_option(SEMANTIC_METRIC_UNIT, ""));
432        assert!(validate_semantic_option(
433            SEMANTIC_PIPELINE,
434            "greptime_trace_v1"
435        ));
436
437        // A cut key validates to false regardless of value.
438        assert!(!validate_semantic_option(
439            "greptime.semantic.metric.monotonic",
440            "true"
441        ));
442        // Unknown key is rejected regardless of value.
443        assert!(!validate_semantic_option(
444            "greptime.semantic.future.key",
445            "x"
446        ));
447
448        // Drift guard: every value stamped by the ingestion path must validate.
449        assert!(validate_semantic_option(
450            SEMANTIC_SIGNAL_TYPE,
451            SIGNAL_TYPE_TRACE
452        ));
453        assert!(validate_semantic_option(
454            SEMANTIC_SIGNAL_TYPE,
455            SIGNAL_TYPE_METRIC
456        ));
457        assert!(validate_semantic_option(
458            SEMANTIC_SIGNAL_TYPE,
459            SIGNAL_TYPE_LOG
460        ));
461        assert!(validate_semantic_option(
462            SEMANTIC_SOURCE,
463            SOURCE_OPENTELEMETRY
464        ));
465        assert!(validate_semantic_option(SEMANTIC_SOURCE, SOURCE_PROMETHEUS));
466        assert!(validate_semantic_option(SEMANTIC_SOURCE_VERSION, "2.0"));
467        assert!(validate_semantic_option(
468            SEMANTIC_METRIC_METADATA_QUALITY,
469            METADATA_QUALITY_INFERRED
470        ));
471        assert!(validate_semantic_option(
472            SEMANTIC_METRIC_METADATA_QUALITY,
473            METADATA_QUALITY_DECLARED
474        ));
475        assert!(validate_semantic_option(
476            SEMANTIC_TRACE_CONVENTIONS,
477            SEMANTIC_VALUE_UNKNOWN
478        ));
479        // An empty value never validates, for any whitelisted key.
480        for key in SEMANTIC_OPTION_KEYS {
481            assert!(
482                !validate_semantic_option(key, ""),
483                "empty value should never validate for {key}"
484            );
485        }
486    }
487
488    #[test]
489    fn test_entity_option_key() {
490        // Well-formed entity keys are accepted by the open sub-namespace, and are
491        // therefore recognised as semantic option keys.
492        for key in [
493            "greptime.semantic.entity.service.id",
494            "greptime.semantic.entity.k8s.pod.id",
495            "greptime.semantic.entity.service.instance.descriptive",
496            "greptime.semantic.entity.host.scope",
497            "greptime.semantic.entity.agent.id",
498        ] {
499            assert!(is_entity_option_key(key), "should accept {key}");
500            assert!(is_semantic_option_key(key), "should recognise {key}");
501        }
502
503        // Malformed: empty type segment, bogus role, missing role, bare prefix,
504        // invalid (uppercase) charset in the type.
505        for key in [
506            "greptime.semantic.entity..id",
507            "greptime.semantic.entity.service.bogusrole",
508            "greptime.semantic.entity.service",
509            "greptime.semantic.entity.",
510            "greptime.semantic.entity.Service.id",
511        ] {
512            assert!(!is_entity_option_key(key), "should reject {key}");
513            assert!(!is_semantic_option_key(key), "should not recognise {key}");
514        }
515
516        // A non-entity semantic key is not an entity key.
517        assert!(!is_entity_option_key(SEMANTIC_SIGNAL_TYPE));
518
519        // Drift guard: the auto-stamped constant is a well-formed entity key.
520        assert!(is_entity_option_key(SEMANTIC_ENTITY_SERVICE_ID));
521        assert!(is_semantic_option_key(SEMANTIC_ENTITY_SERVICE_ID));
522    }
523
524    #[test]
525    fn test_validate_entity_option() {
526        // Single- and composite-id column lists validate.
527        assert!(validate_semantic_option(
528            "greptime.semantic.entity.service.id",
529            "service_name"
530        ));
531        assert!(validate_semantic_option(
532            "greptime.semantic.entity.process.id",
533            "pid,start_time"
534        ));
535        // Empty value and blank/empty tokens do not.
536        assert!(!validate_semantic_option(
537            "greptime.semantic.entity.service.id",
538            ""
539        ));
540        assert!(!validate_semantic_option(
541            "greptime.semantic.entity.process.id",
542            "pid,"
543        ));
544        // A malformed entity key validates to false regardless of value.
545        assert!(!validate_semantic_option(
546            "greptime.semantic.entity.service.bogusrole",
547            "service_name"
548        ));
549    }
550}
table/requests/semantic.rs

table/requests/
semantic.rs
