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| author | drh <drh@noemail.net> | 2017-09-15 15:38:01 +0000 |
|---|---|---|
| committer | drh <drh@noemail.net> | 2017-09-15 15:38:01 +0000 |
| commit | 3df6c3b1c5fad0204902846b27c4b5ccffeda57f (patch) | |
| tree | 305c7ce1f9339723f592aba5e3163268b620c751 /src/expr.c | |
| parent | a19543fe703823a434d5d0702db9e45075958be1 (diff) | |
| download | sqlite-3df6c3b1c5fad0204902846b27c4b5ccffeda57f.tar.gz sqlite-3df6c3b1c5fad0204902846b27c4b5ccffeda57f.zip | |
Improved the header-comment documentation on sqlite3ExprCodeExprList().
No changes to code.
FossilOrigin-Name: 5dc3ecb5f67968545fb35ceed61ad625e069c4e744c5c3ebaea65e2fee347a5f
Diffstat (limited to 'src/expr.c')
| -rw-r--r-- | src/expr.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/expr.c b/src/expr.c index 38c799c6b..405103f21 100644 --- a/src/expr.c +++ b/src/expr.c @@ -4252,7 +4252,9 @@ void sqlite3ExprCodeAndCache(Parse *pParse, Expr *pExpr, int target){ ** Generate code that pushes the value of every element of the given ** expression list into a sequence of registers beginning at target. ** -** Return the number of elements evaluated. +** Return the number of elements evaluated. The number returned will +** usually be pList->nExpr but might be reduced if SQLITE_ECEL_OMITREF +** is defined. ** ** The SQLITE_ECEL_DUP flag prevents the arguments from being ** filled using OP_SCopy. OP_Copy must be used instead. @@ -4263,6 +4265,8 @@ void sqlite3ExprCodeAndCache(Parse *pParse, Expr *pExpr, int target){ ** The SQLITE_ECEL_REF flag means that expressions in the list with ** ExprList.a[].u.x.iOrderByCol>0 have already been evaluated and stored ** in registers at srcReg, and so the value can be copied from there. +** If SQLITE_ECEL_OMITREF is also set, then the values with u.x.iOrderByCol>0 +** are simply omitted rather than being copied from srcReg. */ int sqlite3ExprCodeExprList( Parse *pParse, /* Parsing context */ |