database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-08-08 14:02:16 +03:00
Code Activity

When commands such as ALTER TABLE and VACUUM use SQL internally, make sure

Browse Source 
they use only the built-in functions and not application-defined overrides
for those functions.

FossilOrigin-Name: 0291ed974d5bf1e344e2c38422530cc961b897da
This commit is contained in:
drh
2010-04-24 14:02:59 +00:00
parent 9a6e897328
commit 545f587fc8
10 changed files with 109 additions and 37 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
src/callback.c
View File

@@ -353,14 +353,19 @@ FuncDef *sqlite3FindFunction(
/* If no match is found, search the built-in functions.
**
** If the SQLITE_PreferBuiltin flag is set, then search the built-in
** functions even if a prior app-defined function was found. And give
** priority to built-in functions.
**
** Except, if createFlag is true, that means that we are trying to
** install a new function. Whatever FuncDef structure is returned will
** have fields overwritten with new information appropriate for the
** new function. But the FuncDefs for built-in functions are read-only.
** So we must not search for built-ins when creating a new function.
*/
if( !createFlag && !pBest ){
if( !createFlag && (pBest==0 || (db->flags & SQLITE_PreferBuiltin)!=0) ){
FuncDefHash *pHash = &GLOBAL(FuncDefHash, sqlite3GlobalFunctions);
bestScore = 0;
p = functionSearch(pHash, h, zName, nName);
while( p ){
int score = matchQuality(p, nArg, enc);