Errors¶

Classes are defined in rowx_core.errors. rowx and rowx.errors re-export those same objects. rowx.errors.RowNotFound is rowx_core.errors.RowNotFound, and from rowx import RowNotFound is that object. The native error registry uses those classes. There is no Postgres-specific exception tree. The classes and their attributes are Errors.

Constructing a query raises TypeError for a bad template: a value that is not a template, a NUL in the static text, a conversion, an unsupported format spec, and an :ident value that is not a non-empty str (or a tuple of them) without a NUL or a control character.

When the method runs, that executor's compiler emits $n and the adjacency space, quotes the captured identifier, and raises TypeError for an :ident outside plain code, a name longer than 63 bytes, and more than 65535 parameters.

one raises RowNotFound when the result has no row (Get started). Another operation on a connection that is streaming raises ConnectionBusyError (Streaming). A transaction used after it has ended, a pooled connection used after its lease, and a session-encoding change raise InterfaceError (Transactions, Deployment caveats, Session state). A value the driver cannot decode raises DecodeError (Known limits).