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Optimization: when doing an UPDATE on a table with indexes on an expression,

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do not update the expression indexes if they do not refer to any of the
columns of the table being updated.

FossilOrigin-Name: a71b101635ed28a4c99734dabb20bd65ef1018c1d63ac143b7321cdb0fafa5d7
This commit is contained in:
drh
2018-09-15 21:38:48 +00:00
parent f7d3b7a56c
commit e9816d82a7
6 changed files with 102 additions and 25 deletions
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src/sqliteInt.h
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@@ -4002,6 +4002,7 @@ void sqlite3GenerateRowDelete(
void sqlite3GenerateRowIndexDelete(Parse*, Table*, int, int, int*, int);
int sqlite3GenerateIndexKey(Parse*, Index*, int, int, int, int*,Index*,int);
void sqlite3ResolvePartIdxLabel(Parse*,int);
int sqlite3ExprReferencesUpdatedColumn(Expr*,int*,int);
void sqlite3GenerateConstraintChecks(Parse*,Table*,int*,int,int,int,int,
u8,u8,int,int*,int*,Upsert*);
#ifdef SQLITE_ENABLE_NULL_TRIM