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Add the highly-experimental "PRAGMA noop_update=TRUE" command.

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FossilOrigin-Name: afe45271b9c0cd379cf0beb94657e2396068c4a18f84003c4c48297760fd83ee
This commit is contained in:
drh
2017-09-12 20:09:31 +00:00
parent d828d0debc
commit 03d405f046
6 changed files with 43 additions and 12 deletions
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11
src/update.c
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@@ -223,6 +223,17 @@ void sqlite3Update(
*/
chngRowid = chngPk = 0;
for(i=0; i<pChanges->nExpr; i++){
#if defined(SQLITE_DEBUG) && !defined(SQLITE_OMIT_FLAG_PRAGMAS)
if( db->flags & SQLITE_NoopUpdate ){
Token x;
sqlite3ExprDelete(db, pChanges->a[i].pExpr);
x.z = pChanges->a[i].zName;
x.n = sqlite3Strlen30(x.z);
pChanges->a[i].pExpr =
sqlite3PExpr(pParse, TK_UPLUS, sqlite3ExprAlloc(db, TK_ID, &x, 0), 0);
if( db->mallocFailed ) goto update_cleanup;
}
#endif
if( sqlite3ResolveExprNames(&sNC, pChanges->a[i].pExpr) ){
goto update_cleanup;
}