Module error_extract 

SQLSTATE-based Hyper error classification.

Phase 0 spike S5 confirmed that Hyper returns PostgreSQL SQLSTATE codes as a structured field on Error::Server. We branch on the stable code, not fragile message text, so Hyper message wording changes don’t break us.

Relevant codes:

• 42P01 — undefined_table → extract the table name and seed-and-retry
• 42703 — undefined_column → report the column name verbatim
• 42601 — syntax_error → forward the message verbatim
• anything else → forward as HyperError

Enums

ErrorClass

Classification of a Hyper error for compile-time validation purposes.

Functions

classify

Classify a hyperdb_api::Error by its SQLSTATE code.