add lib/pq

vendor/github.com/lib/pq/pqerror/pqerror.go

@@ -0,0 +1,35 @@
+//go:generate go run gen.go
+
+// Package pqerror contains PostgreSQL error codes for use with pq.Error.
+package pqerror
+
+// Code is a five-character error code.
+type Code string
+
+// Name returns a more human friendly rendering of the error code, namely the
+// "condition name".
+func (ec Code) Name() string { return errorCodeNames[ec] }
+
+// Class returns the error class, e.g. "28".
+func (ec Code) Class() Class { return Class(ec[:2]) }
+
+// Class is only the class part of an error code.
+type Class string
+
+// Name returns the condition name of an error class.  It is equivalent to the
+// condition name of the "standard" error code (i.e. the one having the last
+// three characters "000").
+func (ec Class) Name() string { return errorCodeNames[Code(ec+"000")] }
+
+// TODO(v2): use "type Severity string" for the below.
+
+// Error severity values.
+const (
+	SeverityFatal   = "FATAL"
+	SeverityPanic   = "PANIC"
+	SeverityWarning = "WARNING"
+	SeverityNotice  = "NOTICE"
+	SeverityDebug   = "DEBUG"
+	SeverityInfo    = "INFO"
+	SeverityLog     = "LOG"
+)