diff options
Diffstat (limited to 'src/where.c')
| -rw-r--r-- | src/where.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/where.c b/src/where.c index ff50f52b4..4dd6579e2 100644 --- a/src/where.c +++ b/src/where.c @@ -5536,10 +5536,14 @@ static int wherePathSolver(WhereInfo *pWInfo, LogEst nRowEst){ ** First look for an existing path among best-so-far paths ** that covers the same set of loops and has the same isOrdered ** setting as the current path candidate. + ** + ** The term "((pTo->isOrdered^isOrdered)&0x80)==0" is equivalent + ** to (pTo->isOrdered==(-1))==(isOrdered==(-1))" for the range + ** of legal values for isOrdered, -1..64. */ for(jj=0, pTo=aTo; jj<nTo; jj++, pTo++){ if( pTo->maskLoop==maskNew - && ((pTo->isOrdered^isOrdered)&80)==0 + && ((pTo->isOrdered^isOrdered)&0x80)==0 ){ testcase( jj==nTo-1 ); break; |