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Initial implementation of per-connection limits and the sqlite3_limit() API.

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The sqllimits1.test script crashes.  SQLITE_LIMIT_PAGE_COUNT and
SQLITE_LIMIT_VDBE_OP are currently ignored. (CVS 4897)

FossilOrigin-Name: 60c77882b2de9f6a45f8bd87c9c6a0cc613f8373
This commit is contained in:
drh
2008-03-20 14:03:29 +00:00
parent f653d78282
commit bb4957f858
21 changed files with 284 additions and 364 deletions
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16
src/sqliteLimit.h
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@@ -12,7 +12,7 @@
**
** This file defines various limits of what SQLite can process.
**
** @(#) $Id: sqliteLimit.h,v 1.6 2007/12/17 16:20:07 drh Exp $
** @(#) $Id: sqliteLimit.h,v 1.7 2008/03/20 14:03:29 drh Exp $
*/
/*
@@ -49,18 +49,24 @@
/*
** The maximum length of a single SQL statement in bytes.
** A value of zero means there is no limit.
**
** It used to be the case that setting this value to zero would
** turn the limit off. That is no longer true. It is not possible
** to turn this limit off.
*/
#ifndef SQLITE_MAX_SQL_LENGTH
# define SQLITE_MAX_SQL_LENGTH 0
# define SQLITE_MAX_SQL_LENGTH 1000000000
#endif
/*
** The maximum depth of an expression tree. This is limited to
** some extent by SQLITE_MAX_SQL_LENGTH. But sometime you might
** want to place more severe limits on the complexity of an
** expression. A value of 0 (the default) means do not enforce
** any limitation on expression tree depth.
** expression.
**
** A value of 0 used to mean that the limit was not enforced.
** But that is no longer true. The limit is now strictly enforced
** at all times.
*/
#ifndef SQLITE_MAX_EXPR_DEPTH
# define SQLITE_MAX_EXPR_DEPTH 1000