Oh! Did you run it with a parameter so: ./bug 1
(otherwise the second connection is not created - sorry, I guess this is confusing - I just wanted to show that the second connection or the second table create the problem). In any case, I reinstalled sqlite-3.3.4 on my Linux - and the bug is still there. In addition, the bug was found originally on Windows (the same version of sqlite), so I suspect it should be also there. Ran On 5/23/06, Robert Simpson <[EMAIL PROTECTED]> wrote:
> -----Original Message----- > From: Ran [mailto:[EMAIL PROTECTED] > Sent: Tuesday, May 23, 2006 8:37 AM > To: [email protected] > Subject: Re: [sqlite] "SQL logic error or missing database" > > On 5/23/06, Jay Sprenkle <[EMAIL PROTECTED]> wrote: > > hmmm... > > it gives a schema changed because 'delete * from x' > actually drops the > table > > but I'm not sure why it gave an error since the prepare was > done after > > the other change was committed... > > ... > > Thanks for your efforts! > > I am afraid that the delete is not connected to the problem. > Also the prepare/step is not. Even the reset/finalize are not > connected to it. The script below gives the problem, while > all the create statements are run by sqlite3_exec (so no > reset/finalize are used there at all). The problem happens > only when stepping the select. See the updated script below: I pasted your code into my Windows environment and ran it. It completed successfully with no errors. > // compile with: gcc -g bug.cpp -lsqlite3 -o bug #include > <stdio.h> #include <stdlib.h> #include <unistd.h> #include <sqlite3.h> > > int main(int argc, char** argv) { > int rc; > sqlite3* db1; > sqlite3* db2; > sqlite3_stmt *pStmt3; > > unlink("bug.db"); // for the test, we make sure we have a > new database. > > // create first connection to the database: db1. > rc = sqlite3_open("bug.db", &db1); > if (rc) { > printf("Cannot open database: %s\n", sqlite3_errmsg(db1)); > exit(1); > } > printf("Opened the database.\n"); > > // create table bla using the first connection db1, inside > a transaction. > sqlite3_exec(db1, "begin", 0, 0, 0); > rc = sqlite3_exec(db1, "create table bla(c int,d int)", 0, 0, 0); > if (rc != SQLITE_OK) { // if we failed, we show it. > printf("Failed to exec statement: %s\n", sqlite3_errmsg(db1)); > } > sqlite3_exec(db1, "commit", 0, 0, 0); // here we commit the > transaction. > > // here we, optionally, create another connection to the > same database, > // and then create other table in a transaction. > if (argc > 1) { > rc = sqlite3_open("bug.db", &db2); // create the second > connection. > if (rc) { > printf("Cannot open database again: %s\n", sqlite3_errmsg(db2)); > exit(1); > } > else { > printf("Opened the database.\n"); > } > > // create table foo > sqlite3_exec(db2, "begin", 0, 0, 0); // start the transaction. > rc = sqlite3_exec(db2, "create table foo(c int,d int)", 0, 0, 0); > if (rc != SQLITE_OK) { // if we failed, we show it. > printf("Failed to exec statement: %s\n", sqlite3_errmsg(db2)); > } > sqlite3_exec(db2, "commit", 0, 0, 0); > } > > // select from table bla using the first connection. > sqlite3_exec(db1, "begin", 0, 0, 0); > rc = sqlite3_prepare(db1, // Database handle > "select * from bla", > -1, // Length of the statement > &pStmt3, // OUT: Statement handle > 0); // OUT: Pointer to > unused portion > > // of the statement > if (rc != SQLITE_OK) { > printf("Failed to prepare statement: %s\n", sqlite3_errmsg(db1)); > } > rc = sqlite3_step(pStmt3); > if (rc != SQLITE_DONE) { // if we failed, we log it. > printf("Failed to step statement: %s\n", sqlite3_errmsg(db1)); > } > else { > printf("deleted all from bla successfully\n"); > } > rc = sqlite3_reset(pStmt3); > sqlite3_exec(db1, "commit", 0, 0, 0); > rc = sqlite3_finalize(pStmt3); > } >
