Module Postgresql.Error_field

type t =
| SEVERITY
| SEVERITY_NONLOCALIZED
| SQLSTATE
| MESSAGE_PRIMARY
| MESSAGE_DETAIL
| MESSAGE_HINT
| STATEMENT_POSITION
| INTERNAL_POSITION
| INTERNAL_QUERY
| CONTEXT
| SCHEMA_NAME
| TABLE_NAME
| COLUMN_NAME
| DATATYPE_NAME
| CONSTRAINT_NAME
| SOURCE_FILE
| SOURCE_LINE
| SOURCE_FUNCTION
val to_string : t ‑> string