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Overview
| Comment: | Add ALWAYS and NEVER macros to currently unreachable but important branches in sqlite3ExprCompare(). |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | expr-codegen-enhancement |
| Files: | files | file ages | folders |
| SHA1: |
cee835fe902e46f283257fb8ec9d9744 |
| User & Date: | drh 2013-11-15 20:06:26 |
Context
|
2013-11-16
| ||
| 13:55 | Simplification and performance improvement to the logic that factors constant expressions ouf of inner loops. check-in: ee9353fd user: drh tags: trunk | |
|
2013-11-15
| ||
| 20:06 | Add ALWAYS and NEVER macros to currently unreachable but important branches in sqlite3ExprCompare(). Closed-Leaf check-in: cee835fe user: drh tags: expr-codegen-enhancement | |
| 19:00 | Merge the operator comment fixes from trunk. check-in: 9f14f55c user: drh tags: expr-codegen-enhancement | |
Changes
Changes to src/expr.c.
3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772 3773 3774 3775 |
}
if( pA->op!=TK_COLUMN && ALWAYS(pA->op!=TK_AGG_COLUMN) && pA->u.zToken ){
if( strcmp(pA->u.zToken,pB->u.zToken)!=0 ){
return pA->op==TK_COLLATE ? 1 : 2;
}
}
if( (pA->flags & EP_Distinct)!=(pB->flags & EP_Distinct) ) return 2;
if( (combinedFlags & EP_TokenOnly)==0 ){
if( combinedFlags & EP_xIsSelect ) return 2;
if( sqlite3ExprCompare(pA->pLeft, pB->pLeft, iTab) ) return 2;
if( sqlite3ExprCompare(pA->pRight, pB->pRight, iTab) ) return 2;
if( sqlite3ExprListCompare(pA->x.pList, pB->x.pList, iTab) ) return 2;
if( (combinedFlags & EP_Reduced)==0 ){
if( pA->iColumn!=pB->iColumn ) return 2;
if( pA->iTable!=pB->iTable
&& (pA->iTable!=iTab || pB->iTable>=0) ) return 2;
}
}
return 0;
}
/*
** Compare two ExprList objects. Return 0 if they are identical and
|
| | | |
3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772 3773 3774 3775 |
}
if( pA->op!=TK_COLUMN && ALWAYS(pA->op!=TK_AGG_COLUMN) && pA->u.zToken ){
if( strcmp(pA->u.zToken,pB->u.zToken)!=0 ){
return pA->op==TK_COLLATE ? 1 : 2;
}
}
if( (pA->flags & EP_Distinct)!=(pB->flags & EP_Distinct) ) return 2;
if( ALWAYS((combinedFlags & EP_TokenOnly)==0) ){
if( combinedFlags & EP_xIsSelect ) return 2;
if( sqlite3ExprCompare(pA->pLeft, pB->pLeft, iTab) ) return 2;
if( sqlite3ExprCompare(pA->pRight, pB->pRight, iTab) ) return 2;
if( sqlite3ExprListCompare(pA->x.pList, pB->x.pList, iTab) ) return 2;
if( ALWAYS((combinedFlags & EP_Reduced)==0) ){
if( pA->iColumn!=pB->iColumn ) return 2;
if( pA->iTable!=pB->iTable
&& (pA->iTable!=iTab || NEVER(pB->iTable>=0)) ) return 2;
}
}
return 0;
}
/*
** Compare two ExprList objects. Return 0 if they are identical and
|