Avoid direct use of runtime_error in PostgreSQL stuff

Adds proper exception which extends it and gets the PostgreSQL error
message.

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/output/pq/pqConn.h b/lib/output/pq/pqConn.h
index 5c9effb..b8609ea 100644
--- a/lib/output/pq/pqConn.h
+++ b/lib/output/pq/pqConn.h
@@ -14,6 +14,12 @@ namespace MyGrate {
 	class DbValue;
 }
 namespace MyGrate::Output::Pq {
+	class PqErr : public std::runtime_error {
+	public:
+		PqErr(const std::string & when, PGconn *);
+		PqErr(const std::string & when, PGresult *);
+	};
+
 	class PqConn : public DbConn {
 	public:
 		static constexpr auto paramMode {ParamMode::DollarNum};