Hello All,
I am trying to implement SQLite on our embedded platform. Since I am in the
process of implementing the VFS, I was trying to give our other developers the
chance to use the in-memory database while we implement the VFS, however I have
noticed that the open code for a database refers finding the default VFS which
then fails since no VFS is present.
I suspect that this is a bug since it prevents the use of the in-memory
database while the VFS isn't implemented or present. I could also see this as
an issue when trying to use SQLite as a pure memory implementation without an
OS/file system behind it.
I am compiling the SQLITE-amalgamation version 3.7.17 with the following
compilation options: -DSQLITE_THREADSAFE=0 -DSQLITE_TEMP_STORE=2
-DSQLITE_OS_OTHER=1 -DSQLITE_ZERO_MALLOC -DSQLITE_ENABLE_MEMSYS5
-DSQLITE_OMIT_LOAD_EXTENSION -DSQLITE_OMIT_FLOATING_POINT
A demo program is below:
#include "sqlite3.h"
#define SQL_BUF_SIZE 10485760 //10 MB * 1024 (KB/MB) * 1024 (B/KB)
uint8_t SQLBuf[SQL_BUF_SIZE];
Int main()
{
int rc = 0;
sqlite3 * database;
//Configure to use a HEAP of pre-allocated memory instead of malloc/calloc/free.
rc = sqlite3_config(SQLITE_CONFIG_HEAP, SQLBuf, SQL_BUF_SIZE, sizeof(uint8_t));
rc = sqlite3_open_v2(":memory:",&database, SQLITE_OPEN_READWRITE |
SQLITE_OPEN_CREATE,NULL);
if(rc != SQLITE_OK)
{
printf("%s\n",((char *)sqlite3_errmsg(database)));
}
return rc;
}
F. Andrew Beal
Acoustical Communications Group
Woods Hole Oceanographic Institution
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