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Avoid redundant table b-tree cursor seeks in UPDATE statements that use the

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two-pass strategy.

FossilOrigin-Name: dc555b1039c6930f6d15355c698ff917a85e8056
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dan
2017-01-28 19:45:34 +00:00
parent 6034d47618
commit f64ece143c
7 changed files with 62 additions and 15 deletions
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2
src/update.c
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@@ -392,7 +392,7 @@ void sqlite3Update(
** be deleted as a result of REPLACE conflict handling. Any of these
** things might disturb a cursor being used to scan through the table
** or index, causing a single-pass approach to malfunction. */
flags = WHERE_ONEPASS_DESIRED | WHERE_SEEK_TABLE;
flags = WHERE_ONEPASS_DESIRED|WHERE_SEEK_UNIQ_TABLE;
if( !pParse->nested && !pTrigger && !hasFK && !chngKey && !bReplace ){
flags |= WHERE_ONEPASS_MULTIROW;
}