Using Postgres connection functions

Joe jma at freedomcircle.com
Sat Jan 13 05:28:17 UTC 2018


Going beyond the connection, there are various other libpq 
functions that use a similar pattern of values passed using 
multiple parallel C arrays, e.g.,

    PGresult *PQexecParams(PGconn *conn,
                        const char *command,
                        int nParams,
                        const Oid *paramTypes,
                        const char * const *paramValues,
                        const int *paramLengths,
                        const int *paramFormats,
                        int resultFormat);

Each of the `paramXxxxs' arguments are arrays (Oid is an alias 
for uint).

    PGresult *PQprepare(PGconn *conn,
                     const char *stmtName,
                     const char *query,
                     int nParams,
                     const Oid *paramTypes);

    PGresult *PQexecPrepared(PGconn *conn,
                          const char *stmtName,
                          int nParams,
                          const char * const *paramValues,
                          const int *paramLengths,
                          const int *paramFormats,
                          int resultFormat);

My point is that there seems to be a need to have a generic or 
generalized mechanism for passing these argument arrays from D to 
C.


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