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Add serial-types 8 and 9 for integer constants of 0 and 1 that use zero

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bytes of storage.  Make the default file format 4.  Add the
SQLITE_DEFAULT_FILE_FORMAT compile-time option to lower the default
file format number so that newly created databases can be read and
written by older versions of SQLite. (CVS 2845)

FossilOrigin-Name: ae301db8a61a74bc72f67f5766811d89a3b3ec72
This commit is contained in:
drh
2005-12-29 19:23:06 +00:00
parent aa81608eb0
commit d946db0064
11 changed files with 95 additions and 74 deletions
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5
src/vdbeInt.h
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@@ -307,6 +307,7 @@ struct Vdbe {
u8 changeCntOn; /* True to update the change-counter */
u8 aborted; /* True if ROLLBACK in another VM causes an abort */
u8 expired; /* True if the VM needs to be recompiled */
u8 minWriteFileFormat; /* Minimum file format for writable database files */
int nChange; /* Number of db changes made since last reset */
i64 startTime; /* Time when query started - used for profiling */
};
@@ -332,8 +333,8 @@ void sqlite3VdbePrintOp(FILE*, int, Op*);
void sqlite3VdbePrintSql(Vdbe*);
#endif
int sqlite3VdbeSerialTypeLen(u32);
u32 sqlite3VdbeSerialType(Mem*);
int sqlite3VdbeSerialPut(unsigned char*, Mem*);
u32 sqlite3VdbeSerialType(Mem*, int);
int sqlite3VdbeSerialPut(unsigned char*, Mem*, int);
int sqlite3VdbeSerialGet(const unsigned char*, u32, Mem*);
void sqlite3VdbeDeleteAuxData(VdbeFunc*, int);