Created Pgsql::Transaction class for handling of transactions. It auto rollsback if no commit has been done.

Also moved some code out of the connection files to their own files.

pgsql/Pgsql_ErrorDetails.h

@@ -0,0 +1,35 @@
+#ifndef PGSQL_ERRORDETAILS_H
+#define PGSQL_ERRORDETAILS_H
+
+#include <string>
+#include <libpq-fe.h>
+
+namespace Pgsql {
+
+	class ErrorDetails {
+	public:
+		static ErrorDetails createErrorDetailsFromPGresult(const PGresult *res);
+
+		std::string errorMessage;
+		std::string state; ///< PG_DIAG_SQLSTATE Error code as listed in	https://www.postgresql.org/docs/9.5/static/errcodes-appendix.html
+		std::string severity;
+		std::string messagePrimary;
+		std::string messageDetail;
+		std::string messageHint;
+		int statementPosition; ///< First character is one, measured in characters not bytes!
+		int internalPosition;
+		std::string internalQuery;
+		std::string context;
+		std::string schemaName;
+		std::string tableName;
+		std::string columnName;
+		std::string datatypeName;
+		std::string constraintName;
+		std::string sourceFile;
+		std::string sourceLine;
+		std::string sourceFunction;
+	};
+
+}
+
+#endif // PGSQL_ERRORDETAILS_H