wasCSharpSQLite – Rev 1
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namespace Community.CsharpSqlite
{
public partial class Sqlite3
{
/*
** 2007 May 7
**
** The author disclaims copyright to this source code. In place of
** a legal notice, here is a blessing:
**
** May you do good and not evil.
** May you find forgiveness for yourself and forgive others.
** May you share freely, never taking more than you give.
**
*************************************************************************
**
** This file defines various limits of what SQLite can process.
*************************************************************************
** Included in SQLite3 port to C#-SQLite; 2008 Noah B Hart
** C#-SQLite is an independent reimplementation of the SQLite software library
**
** SQLITE_SOURCE_ID: 2011-05-19 13:26:54 ed1da510a239ea767a01dc332b667119fa3c908e
**
*************************************************************************
*/
/*
** The maximum length of a TEXT or BLOB in bytes. This also
** limits the size of a row in a table or index.
**
** The hard limit is the ability of a 32-bit signed integer
** to count the size: 2^31-1 or 2147483647.
*/
#if !SQLITE_MAX_LENGTH
const int SQLITE_MAX_LENGTH = 1000000000;
#endif
/*
** This is the maximum number of
**
** * Columns in a table
** * Columns in an index
** * Columns in a view
** * Terms in the SET clause of an UPDATE statement
** * Terms in the result set of a SELECT statement
** * Terms in the GROUP BY or ORDER BY clauses of a SELECT statement.
** * Terms in the VALUES clause of an INSERT statement
**
** The hard upper limit here is 32676. Most database people will
** tell you that in a well-normalized database, you usually should
** not have more than a dozen or so columns in any table. And if
** that is the case, there is no point in having more than a few
** dozen values in any of the other situations described above.
*/
#if !SQLITE_MAX_COLUMN
const int SQLITE_MAX_COLUMN = 2000;
#endif
/*
** The maximum length of a single SQL statement in bytes.
**
** 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.
*/
#if !SQLITE_MAX_SQL_LENGTH
const int 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 used to mean that the limit was not enforced.
** But that is no longer true. The limit is now strictly enforced
** at all times.
*/
#if !SQLITE_MAX_EXPR_DEPTH
const int SQLITE_MAX_EXPR_DEPTH = 1000;
#endif
/*
** The maximum number of terms in a compound SELECT statement.
** The code generator for compound SELECT statements does one
** level of recursion for each term. A stack overflow can result
** if the number of terms is too large. In practice, most SQL
** never has more than 3 or 4 terms. Use a value of 0 to disable
** any limit on the number of terms in a compount SELECT.
*/
#if !SQLITE_MAX_COMPOUND_SELECT
const int SQLITE_MAX_COMPOUND_SELECT = 250;
#endif
/*
** The maximum number of opcodes in a VDBE program.
** Not currently enforced.
*/
#if !SQLITE_MAX_VDBE_OP
const int SQLITE_MAX_VDBE_OP = 25000;
#endif
/*
** The maximum number of arguments to an SQL function.
*/
#if !SQLITE_MAX_FUNCTION_ARG
const int SQLITE_MAX_FUNCTION_ARG = 127;//# define SQLITE_MAX_FUNCTION_ARG 127
#endif
/*
** The maximum number of in-memory pages to use for the main database
** table and for temporary tables. The SQLITE_DEFAULT_CACHE_SIZE
*/
#if !SQLITE_DEFAULT_CACHE_SIZE
const int SQLITE_DEFAULT_CACHE_SIZE = 2000;
#endif
#if !SQLITE_DEFAULT_TEMP_CACHE_SIZE
const int SQLITE_DEFAULT_TEMP_CACHE_SIZE = 500;
#endif
/*
** The default number of frames to accumulate in the log file before
** checkpointing the database in WAL mode.
*/
#if !SQLITE_DEFAULT_WAL_AUTOCHECKPOINT
const int SQLITE_DEFAULT_WAL_AUTOCHECKPOINT = 1000;
//# define SQLITE_DEFAULT_WAL_AUTOCHECKPOINT 1000
#endif
/*
** The maximum number of attached databases. This must be between 0
** and 62. The upper bound on 62 is because a 64-bit integer bitmap
** is used internally to track attached databases.
*/
#if !SQLITE_MAX_ATTACHED
const int SQLITE_MAX_ATTACHED = 10;
#endif
/*
** The maximum value of a ?nnn wildcard that the parser will accept.
*/
#if !SQLITE_MAX_VARIABLE_NUMBER
const int SQLITE_MAX_VARIABLE_NUMBER = 999;
#endif
/* Maximum page size. The upper bound on this value is 65536. This a limit
** imposed by the use of 16-bit offsets within each page.
**
**
** Earlier versions of SQLite allowed the user to change this value at
** compile time. This is no longer permitted, on the grounds that it creates
** a library that is technically incompatible with an SQLite library
** compiled with a different limit. If a process operating on a database
** with a page-size of 65536 bytes crashes, then an instance of SQLite
** compiled with the default page-size limit will not be able to rollback
** the aborted transaction. This could lead to database corruption.
*/
//#if SQLITE_MAX_PAGE_SIZE
//# undef SQLITE_MAX_PAGE_SIZE
//#endif
//#define SQLITE_MAX_PAGE_SIZE 65536
const int SQLITE_MAX_PAGE_SIZE = 65535;
/*
** The default size of a database page.
*/
#if !SQLITE_DEFAULT_PAGE_SIZE
const int SQLITE_DEFAULT_PAGE_SIZE = 1024;
#endif
#if SQLITE_DEFAULT_PAGE_SIZE //SQLITE_DEFAULT_PAGE_SIZE>SQLITE_MAX_PAGE_SIZE
//# undef SQLITE_DEFAULT_PAGE_SIZE
const int SQLITE_DEFAULT_PAGE_SIZE SQLITE_MAX_PAGE_SIZE
#endif
/*
** Ordinarily, if no value is explicitly provided, SQLite creates databases
** with page size SQLITE_DEFAULT_PAGE_SIZE. However, based on certain
** device characteristics (sector-size and atomic write() support),
** SQLite may choose a larger value. This constant is the maximum value
** SQLite will choose on its own.
*/
#if !SQLITE_MAX_DEFAULT_PAGE_SIZE
const int SQLITE_MAX_DEFAULT_PAGE_SIZE = 8192;
#endif
#if SQLITE_MAX_DEFAULT_PAGE_SIZE //SQLITE_MAX_DEFAULT_PAGE_SIZE>SQLITE_MAX_PAGE_SIZE
//# undef SQLITE_MAX_DEFAULT_PAGE_SIZE
const int SQLITE_MAX_DEFAULT_PAGE_SIZE SQLITE_MAX_PAGE_SIZE
#endif
/*
** Maximum number of pages in one database file.
**
** This is really just the default value for the max_page_count pragma.
** This value can be lowered (or raised) at run-time using that the
** max_page_count macro.
*/
#if !SQLITE_MAX_PAGE_COUNT
const int SQLITE_MAX_PAGE_COUNT = 1073741823;
#endif
/*
** Maximum length (in bytes) of the pattern in a LIKE or GLOB
** operator.
*/
//#if !SQLITE_MAX_LIKE_PATTERN_LENGTH
const int SQLITE_MAX_LIKE_PATTERN_LENGTH = 50000;
//#endif
/*
** Maximum depth of recursion for triggers.
**
** A value of 1 means that a trigger program will not be able to itself
** fire any triggers. A value of 0 means that no trigger programs at all
** may be executed.
*/
#if !SQLITE_MAX_TRIGGER_DEPTH
const int SQLITE_MAX_TRIGGER_DEPTH = 101; // # define SQLITE_MAX_TRIGGER_DEPTH 1000
#else
const int SQLITE_MAX_TRIGGER_DEPTH=1;
#endif
}
}