Module table_semantics 

information_schema.table_semantics: the queryable view over the table semantic layer. One row per table that is part of it, so a consumer can discover the observability concept a table stands for with a single SQL query instead of parsing every table’s create_options.

The few signal-agnostic keys are promoted to their own columns (signal_type / source / source_version / pipeline / metadata_quality); the remaining signal-specific keys are folded into a semantic_options JSON string, keyed by the option name with the greptime.semantic. prefix stripped.

entity_declarations reports the entities the table contributes to the graph, including the ones the conventions derive with no option set — so a table with no semantic option still gets a row. It shows the outcome, not the reasoning: a declaration dropped for naming a missing column is simply absent, and only the log says why.

Structs

DeclarationEntry 🔒

The JSON form of one declaration in the entity_declarations column.

InformationSchemaSemanticTablesBuilder 🔒

InformationSchemaTableSemantics 🔒

SemanticRow 🔒

The semantic projection of a single table: the signal-agnostic keys promoted to columns, plus a JSON tail for the rest. Borrows from the table’s options.

Constants

ENTITY_DECLARATIONS

INIT_CAPACITY 🔒

METADATA_QUALITY

PIPELINE

SEMANTIC_OPTIONS

SIGNAL_TYPE

SOURCE

SOURCE_VERSION

TABLE_CATALOG

TABLE_ID

TABLE_NAME

TABLE_SCHEMA

Functions

entity_declarations_json 🔒

optional_value 🔒