On Feb 3, 2009, at 12:16 PM, Nathan Biggs wrote:
> I have a question about version 3.6.10.
>
> I downloaded the amalgamation source code and built a static
> library. I
> have included the static library in my Windows console application. I
> have noticed something very strange though. to execute my statement I
> use the prepare and then step not execute. If I run the following
> sql,
> I get no return data.
>
> select a.column1, b.column2
> from aTable a
> left join bTable b
> on a.id = b.aTable_id
>
> If I run the same sql statement through the command-line program
> downloaded from the site for 3.6.10, it returns the data with
> b.column2
> being null. Which is what I expected.
The command-line program uses exactly the same interfaces you are
using. Are you sure that szSql is correct? Why are you not checking
the return code from sqlite3_perpare()?
>
>
> Below is my code
>
> // open database
> rc = sqlite3_open(szFile, &db);
> if( rc ){
> fprintf(stderr, "Can't open database: %s\n",
> sqlite3_errmsg(db));
> sqlite3_close(db);
> exit(1);
> }
>
> sqlite3_stmt *ppStmt = 0;;
> const char *zLeftover;
>
> //compile sql statement
> rc = sqlite3_prepare(db, szSQL, -1, &ppStmt, &zLeftover);
>
> //step through recordset
> int i = 0;
> int nCol = 0;
> char rowstr[256] = "";
> const char *temp;
>
> //get column count
> nCol = sqlite3_column_count(ppStmt);
>
> //for each row
> while(sqlite3_step(ppStmt)==SQLITE_ROW){
>
> //for each column
> for(int j=0;j<nCol;j++){
> temp = (char *)sqlite3_column_text(ppStmt, j);
> strcat(rowstr, temp);
> strcat(rowstr, "|");
> }
>
> cout << rowstr << endl;
> strcpy(rowstr, "");
> i++; //increment row counter
> }
>
> //delete recordset
> rc = sqlite3_finalize(ppStmt);
>
> // close database
> sqlite3_close(db);
>
> cout << "finished" << endl;
>
>
> --
> *Nathan Biggs*
> Computerway Food Systems
> System Controls Manager
>
> (336) 841-7289 /Work/
> (336) 841-2594 /Fax/
> nbi...@mycfs.com
>
> PO Box 5623 (27262)
> 635 Southwest Street
> High Point, NC 27260
> _______________________________________________
> sqlite-users mailing list
> sqlite-users@sqlite.org
> http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
D. Richard Hipp
d...@hwaci.com
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