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Overview
| Comment: | Simplification to the upsert logic. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | upsert |
| Files: | files | file ages | folders |
| SHA3-256: | f36d07a5b24cc48e3daa8b18dd34c50d9025c6c0ba019926610538b54f7b66ec |
| User & Date: | drh 2018-04-17 18:18:05 |
Context
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2018-04-17
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| 18:50 | TK_REGISTER expressions nodes are probably not constant. Make sure sqlite3ExprIsConstant() knows this. check-in: f3d91cad user: drh tags: upsert | |
| 18:18 | Simplification to the upsert logic. check-in: f36d07a5 user: drh tags: upsert | |
| 18:16 | Add some more simple test cases for UPSERT. And a minor fix. check-in: 27cd3b2f user: dan tags: upsert | |
Changes
Changes to src/insert.c.
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** (C) Unique index that do use OE_Replace by default. ** ** The ordering of (2) and (3) is accomplished by making sure the linked ** list of indexes attached to a table puts all OE_Replace indexes last ** in the list. See sqlite3CreateIndex() for where that happens. */ /* If there is an ON CONFLICT clause without a constraint-target ** (In other words, one of "ON CONFLICT DO NOTHING" or ** "ON DUPLICATION KEY UPDATE") then change the overrideError to ** whichever is appropriate. */ if( pUpsert ){ if( pUpsert->pUpsertTarget==0 ){ if( pUpsert->pUpsertSet==0 ){ /* An ON CONFLICT DO NOTHING clause, without a constraint-target. ** Make all unique constraint resolution be OE_Ignore */ overrideError = OE_Ignore; pUpsert = 0; }else{ /* An ON DUPLICATE KEY UPDATE clause. All unique constraints ** do upsert processing */ overrideError = OE_Update; } }else if( (pUpIdx = pUpsert->pUpsertIdx)!=0 ){ sAddr.upsertTop = sqlite3VdbeMakeLabel(v); sAddr.upsertBtm = sqlite3VdbeMakeLabel(v); } } /* If rowid is changing, make sure the new rowid does not previously ** exist in the table. |
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** (C) Unique index that do use OE_Replace by default.
**
** The ordering of (2) and (3) is accomplished by making sure the linked
** list of indexes attached to a table puts all OE_Replace indexes last
** in the list. See sqlite3CreateIndex() for where that happens.
*/
if( pUpsert ){
if( pUpsert->pUpsertTarget==0 ){
/* An ON CONFLICT DO NOTHING clause, without a constraint-target.
** Make all unique constraint resolution be OE_Ignore */
assert( pUpsert->pUpsertSet==0 );
overrideError = OE_Ignore;
pUpsert = 0;
}else if( (pUpIdx = pUpsert->pUpsertIdx)!=0 ){
/* If the constraint-target is on some column other than
** then ROWID, then we might need to move the UPSERT around
** so that it occurs in the correct order. */
sAddr.upsertTop = sqlite3VdbeMakeLabel(v);
sAddr.upsertBtm = sqlite3VdbeMakeLabel(v);
}
}
/* If rowid is changing, make sure the new rowid does not previously
** exist in the table.
|