ResourceServer: Resource store sql backend (#90170)

pkg/storage/unified/sql/sqltemplate/dialect_postgresql.go

@@ -0,0 +1,37 @@
+package sqltemplate
+
+import (
+	"errors"
+	"strings"
+)
+
+// PostgreSQL is an implementation of Dialect for the PostgreSQL DMBS.
+var PostgreSQL = postgresql{
+	rowLockingClauseMap: rowLockingClauseAll,
+	argPlaceholderFunc:  argFmtPositional,
+	name:                "postgres",
+}
+
+var _ Dialect = PostgreSQL
+
+// PostgreSQL-specific errors.
+var (
+	ErrPostgreSQLUnsupportedIdent = errors.New("identifiers in PostgreSQL cannot contain the character with code zero")
+)
+
+type postgresql struct {
+	standardIdent
+	rowLockingClauseMap
+	argPlaceholderFunc
+	name
+}
+
+func (p postgresql) Ident(s string) (string, error) {
+	// See:
+	//	https://www.postgresql.org/docs/current/sql-syntax-lexical.html
+	if strings.IndexByte(s, 0) != -1 {
+		return "", ErrPostgreSQLUnsupportedIdent
+	}
+
+	return p.standardIdent.Ident(s)
+}