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Improved the header-comment documentation on sqlite3ExprCodeExprList().

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FossilOrigin-Name: 5dc3ecb5f67968545fb35ceed61ad625e069c4e744c5c3ebaea65e2fee347a5f
This commit is contained in:
drh
2017-09-15 15:38:01 +00:00
parent a19543fe70
commit 3df6c3b1c5
3 changed files with 12 additions and 8 deletions
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6
src/expr.c
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@@ -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 */