Hi all,
My question is does PgSQL libpq functions support multibyte characters...if not then is there a way to provide multibyte data to Postgres using libpq functions. The other question is does Postgres support Chinese characters....if I insert chinese characters into a table, when I read, will I get the same chinese characters. Please help me out in this regard.
I have created a database with UNICODE support which has a table GSNames(Gsname varchar(40), status int, errorcode int)
I tried to insert into this table from a simple C program using libpq functions....but it gives error as libpq does not support wchar datatypes. Here is the code -
int main()
{
// wchar_t szQuery[255];
char szQuery[255];
PGconn *DBCon;
PGresult *DBResult;
//Connect to the database with default settings
DBCon = PQsetdbLogin(NULL, NULL, NULL, NULL, "test1", "postgres", ""); //test1 is database created with UNICODE encoding
//check if there is any error in connecting to the database
if(PQstatus(DBCon) == CONNECTION_BAD)
{
fprintf(stderr,"\nGetAttributeInfo(): Connection to database failed.");
fprintf(stderr,"\nGetAttributeInfo(): %s", PQerrorMessage(DBCon));
return ERROR_DB_CON;
}
else
{
fprintf(stderr,"\nGetAttributeInfo(): Connection to database successful.");
}
//form the DELETE command as character buffer.
//swprintf(szQuery,500,L"INSERT INTO gsnames values('×¢²á',2,2)");
sprintf(szQuery,"INSERT INTO gsnames values('×¢²á',2,2)");
//execute the command.
DBResult = PQexec(DBCon, (char *)szQuery);
//check for any errors in executing the query.
if(PQresultStatus(DBResult) != PGRES_COMMAND_OK)
{
fprintf(stderr,"\nGetAttributeInfo(): %s", PQresultErrorMessage(DBResult));
PQclear(DBResult);
PQfinish(DBCon);
return ERROR_DB_EXEC;
}
else
{
fprintf(stderr,"\nDBInsertPointAttribute(): Insertion successful. No. of rows affected = %d.", PQntuples(DBResult));
}
PQclear(DBResult);
PQfinish(DBCon);
return 0;
}
The problem is I am not able to pass multibyte characters to postgres. Please help.....Thanks in advance.
Between I am using Postgres version 7.4.3. While installing Pgsql, I dnt specify any encoding or multi byte character support for initdb.
Regs,
Pradeep