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Overview
Comment: | Remove an unnecessary temporary register allocation. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | orderby-planning |
Files: | files | file ages | folders |
SHA1: |
5d506743f541b022cde04a9606baa468 |
User & Date: | dan 2014-03-24 09:34:58.396 |
Context
2014-03-24
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18:08 | Avoid unnecessary moving of content between registers during an ORDER BY. (check-in: 4f472accf0 user: drh tags: orderby-planning) | |
09:34 | Remove an unnecessary temporary register allocation. (check-in: 5d506743f5 user: dan tags: orderby-planning) | |
02:20 | Remove a pointless OP_Once operation in ORDER BY clauses with LIMIT. (check-in: e6c59d2331 user: drh tags: orderby-planning) | |
Changes
Changes to src/select.c.
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1142 1143 1144 1145 1146 1147 1148 | if( pSort->labelBkOut ){ sqlite3VdbeAddOp2(v, OP_Gosub, pSort->regReturn, pSort->labelBkOut); sqlite3VdbeAddOp2(v, OP_Goto, 0, addrBreak); sqlite3VdbeResolveLabel(v, pSort->labelBkOut); } iTab = pSort->iECursor; | < | 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 | if( pSort->labelBkOut ){ sqlite3VdbeAddOp2(v, OP_Gosub, pSort->regReturn, pSort->labelBkOut); sqlite3VdbeAddOp2(v, OP_Goto, 0, addrBreak); sqlite3VdbeResolveLabel(v, pSort->labelBkOut); } iTab = pSort->iECursor; if( eDest==SRT_Output || eDest==SRT_Coroutine ){ regRowid = 0; regRow = pDest->iSdst; nSortData = nColumn; }else{ regRowid = sqlite3GetTempReg(pParse); regRow = sqlite3GetTempReg(pParse); |
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