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| author | drh <drh@noemail.net> | 2017-08-01 19:53:43 +0000 |
|---|---|---|
| committer | drh <drh@noemail.net> | 2017-08-01 19:53:43 +0000 |
| commit | 86b40dfd33fd58dd92be682365fa28b4a5f8b31a (patch) | |
| tree | dc907ac6f2a51f331ffa1faf46ab35c5c434493f /src/insert.c | |
| parent | b7673ede37708db59ada16666f679b27fae84c5b (diff) | |
| download | sqlite-86b40dfd33fd58dd92be682365fa28b4a5f8b31a.tar.gz sqlite-86b40dfd33fd58dd92be682365fa28b4a5f8b31a.zip | |
Split the OP_Last opcode into OP_Last and OP_SeekEnd. Use OP_SeekEnd to
position a cursor prior to appending. Ticket [cb91bf4290c211d].
FossilOrigin-Name: 3e02474c7bbe16891a7cfc8771cf72f64cd2c0692779037982d7d307512a4f23
Diffstat (limited to 'src/insert.c')
| -rw-r--r-- | src/insert.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/insert.c b/src/insert.c index d51e64b8f..f8e9095ea 100644 --- a/src/insert.c +++ b/src/insert.c @@ -2180,7 +2180,7 @@ static int xferOptimization( } sqlite3VdbeAddOp3(v, OP_RowData, iSrc, regData, 1); if( db->mDbFlags & DBFLAG_Vacuum ){ - sqlite3VdbeAddOp3(v, OP_Last, iDest, 0, -1); + sqlite3VdbeAddOp1(v, OP_SeekEnd, iDest); insFlags = OPFLAG_NCHANGE|OPFLAG_LASTROWID| OPFLAG_APPEND|OPFLAG_USESEEKRESULT; }else{ @@ -2217,7 +2217,7 @@ static int xferOptimization( ** collation sequence BINARY, then it can also be assumed that the ** index will be populated by inserting keys in strictly sorted ** order. In this case, instead of seeking within the b-tree as part - ** of every OP_IdxInsert opcode, an OP_Last is added before the + ** of every OP_IdxInsert opcode, an OP_SeekEnd is added before the ** OP_IdxInsert to seek to the point within the b-tree where each key ** should be inserted. This is faster. ** @@ -2232,7 +2232,7 @@ static int xferOptimization( } if( i==pSrcIdx->nColumn ){ idxInsFlags = OPFLAG_USESEEKRESULT; - sqlite3VdbeAddOp3(v, OP_Last, iDest, 0, -1); + sqlite3VdbeAddOp1(v, OP_SeekEnd, iDest); } } if( !HasRowid(pSrc) && pDestIdx->idxType==2 ){ |