Query API

Semantic field expressions compiled to SQL by OntoSession.find() and count().

For usage patterns, see semantic queries. For compile errors, see TROUBLESHOOTING.md.

Field references

ontosql.query.expr.FieldRef dataclass

Bases: _Combinable

Reference to a semantic model field in a query.

ontosql.query.expr.FieldPath dataclass

Bases: _Combinable

Nested semantic field path (e.g. Person.employer.name).

Expression types

ontosql.query.expr.StartsWith dataclass

Bases: _Combinable

ontosql.query.expr.Contains dataclass

Bases: _Combinable

ontosql.query.expr.EndsWith dataclass

Bases: _Combinable

ontosql.query.expr.OrderBy dataclass

ORDER BY clause with optional descending sort.

Errors

ontosql.query.expr.CompileError

Bases: Exception

Raised when a query expression cannot be compiled.