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Performance improvements:

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Avoid unnecessary seeks when doing a single-row UPDATE on a WITHOUT ROWID
table.

FossilOrigin-Name: 6f187a0fb1b09ebc4732c4afbf3c813f82e069f1
This commit is contained in:
drh
2013-11-08 15:19:46 +00:00
parent 81897bb14e
commit fc8d4f96b4
6 changed files with 91 additions and 33 deletions
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2
src/vdbe.c
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@@ -2182,6 +2182,7 @@ case OP_IfNot: { /* jump, in1 */
}
/* Opcode: IsNull P1 P2 * * *
** Synopsis: if r[P1]==NULL goto P2
**
** Jump to P2 if the value in register P1 is NULL.
*/
@@ -2194,6 +2195,7 @@ case OP_IsNull: { /* same as TK_ISNULL, jump, in1 */
}
/* Opcode: NotNull P1 P2 * * *
** Synopsis: if r[P1]!=NULL goto P2
**
** Jump to P2 if the value in register P1 is not NULL.
*/