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Begin a series of changes designed to reduce the scope and frequency of

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invalidating schemas.  Design goals are that the internal schema should
never be deleted out from under a prepared statement that is running and
that all prepared statements should be expired if the schema is invalidated.
At the same time, minimize the number of schema invalidations.  This change
merely revises the sqlite3ResetInternalSchema() function to use -1 as the
wildcard for "all" rather than 0, so that we can reset the main schema
independently of all the others.

FossilOrigin-Name: 6a8ad6e31e0d2b8a5ace38faf0efd805155ee5f3
This commit is contained in:
drh
2011-04-02 16:28:52 +00:00
parent 6c15487b7e
commit c7792fa052
12 changed files with 52 additions and 39 deletions
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src/backup.c
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@@ -401,7 +401,7 @@ int sqlite3_backup_step(sqlite3_backup *p, int nPage){
int nDestTruncate;
if( p->pDestDb ){
sqlite3ResetInternalSchema(p->pDestDb, 0);
sqlite3ResetInternalSchema(p->pDestDb, -1);
}
/* Set nDestTruncate to the final number of pages in the destination