Export: support export in postgresql (#58553)

pkg/services/export/utils.go

@@ -0,0 +1,29 @@
+package export
+
+import (
+	"strings"
+
+	"github.com/grafana/grafana/pkg/infra/db"
+)
+
+func isTableNotExistsError(err error) bool {
+	txt := err.Error()
+	return strings.HasPrefix(txt, "no such table") || // SQLite
+		strings.HasSuffix(txt, " does not exist") || // PostgreSQL
+		strings.HasSuffix(txt, " doesn't exist") // MySQL
+}
+
+func removeQuotesFromQuery(query string, remove bool) string {
+	if remove {
+		return strings.ReplaceAll(query, `"`, "")
+	}
+	return query
+}
+
+func isMySQLEngine(sql db.DB) bool {
+	return sql.GetDBType() == "mysql"
+}
+
+func isPostgreSQL(sql db.DB) bool {
+	return sql.GetDBType() == "postgres"
+}