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Corrections to comments on the whereScanInit() interface.

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FossilOrigin-Name: ab7ab415d19524f6c3901e474d3a154f55d28530
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drh
2016-05-06 18:47:23 +00:00
parent 87f8f1ac69
commit a3fd75d426
3 changed files with 16 additions and 13 deletions
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14
src/where.c
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@@ -261,7 +261,10 @@ static WhereTerm *whereScanNext(WhereScan *pScan){
**
** The scanner will be searching the WHERE clause pWC. It will look
** for terms of the form "X <op> <expr>" where X is column iColumn of table
** iCur. The <op> must be one of the operators described by opMask.
** iCur. Or if pIdx!=0 then X is column iColumn of index pIdx. pIdx
** must be one of the indexes of table iCur.
**
** The <op> must be one of the operators described by opMask.
**
** If the search is for X and the WHERE clause contains terms of the
** form X=Y then this routine might also return terms of the form
@@ -309,11 +312,12 @@ static WhereTerm *whereScanInit(
/*
** Search for a term in the WHERE clause that is of the form "X <op> <expr>"
** where X is a reference to the iColumn of table iCur and <op> is one of
** the WO_xx operator codes specified by the op parameter.
** Return a pointer to the term. Return 0 if not found.
** where X is a reference to the iColumn of table iCur or of index pIdx
** if pIdx!=0 and <op> is one of the WO_xx operator codes specified by
** the op parameter. Return a pointer to the term. Return 0 if not found.
**
** If pIdx!=0 then search for terms matching the iColumn-th column of pIdx
** If pIdx!=0 then it must be one of the indexes of table iCur.
** Search for terms matching the iColumn-th column of pIdx
** rather than the iColumn-th column of table iCur.
**
** The term returned might by Y=<expr> if there is another constraint in