[Original] libpq-PostgreSQL client Programming Interface (2) ---- command execution function in libpq

PGresult *  *command = = PQexec(conn,command);

 (PQresultStatus(res) !=                   cout << PQresultErrorMessage(res) <<             }

command = ;

BEGIN/COMMITThe command is used to separate the entire string into multiple transactions. Note thatPGresultThe structure only describes the result of the last command executed in the string ." No experiment is conducted here. If multiple transactions are involved in actual development, we recommend that you define different PQexec for execution. For complex businesses, you can consider using stored procedures or other methods.

        PGresult * * strSQL =         res =(PQresultStatus(res) !=<<  << PQresultStatus(res) <<            cout << PQresultErrorMessage(res) <<<<  << PQoidValue(res) <<*= PQexec(conn,(PQresultStatus(res_getallrows) !=<<  << PQresultStatus(res_getallrows) <<            cout << PQresultErrorMessage(res_getallrows) <<            cout <<  << PQntuples(res_getallrows) <<            cout <<  << PQnfields(res_getallrows) << fieldsCount =( fieldIndex = ;fieldIndex < fieldsCount;++<<  << fieldIndex <<  << PQfname(res_getallrows,fieldIndex) <<                cout <<  << fieldIndex <<  << PQfformat(res_getallrows,fieldIndex) <<                cout <<  << fieldIndex <<  << PQfmod(res_getallrows,fieldIndex) <<                cout <<  << fieldIndex <<  << PQfsize(res_getallrows,fieldIndex) <<<<  << PQfnumber(res_getallrows,) <<<<   << PQfnumber(res_getallrows,) <<             row_number = ,column_number = (!<<  << row_number <<  << column_number <<  << PQgetvalue(res_getallrows,row_number,column_number) <<        PQclear(res_getallrows);

At this point, you can use libpq to complete most of the daily development work of the EnterpriseDB (PostgreSQL Plus Advanced Server) database.