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Fix the assert()s in the byte-code engine that prove that cursors

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are unidirectional.

FossilOrigin-Name: 4b0b4e14039469b656662312a5f80f086ede293e9ad04c7bc99a202b683a1e55
This commit is contained in:
drh
2018-06-07 18:01:21 +00:00
parent f1949b6634
commit cf025a8c18
3 changed files with 16 additions and 13 deletions
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12
manifest
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@@ -1,5 +1,5 @@
C Remove\sthe\sNextIfOpen\sand\sPrevIfOpen\sopcodes\swhich\sare\sno\slonger\sneeded\nwhen\sthe\sIN-early-out\soptimization\sis\sworking.
D 2018-06-07T17:32:59.729
C Fix\sthe\sassert()s\sin\sthe\sbyte-code\sengine\sthat\sprove\sthat\scursors\nare\sunidirectional.
D 2018-06-07T18:01:21.263
F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
F Makefile.in bfc40f350586923e0419d2ea4b559c37ec10ee4b6e210e08c14401f8e340f0da
@@ -565,7 +565,7 @@ F src/upsert.c 47edd408cc73f8d3c00a140550d1ad180b407c146285947969dd09874802bf88
F src/utf.c 810fbfebe12359f10bc2a011520a6e10879ab2a163bcb26c74768eab82ea62a5
F src/util.c d9eb0a6c4aae1b00a7369eadd7ca0bbe946cb4c953b6751aa20d357c2f482157
F src/vacuum.c 36e7d21a20c0bf6ef4ef7c399d192b5239410b7c4d3c1070fba4e30810d0b855
F src/vdbe.c 3b8517d41c514a6e892f20a74c69d9c04849fe45fb676703f5c6672f11fca97f
F src/vdbe.c d7a475cec51c83daf0d348301a1aec77f535832ea946632b5738ff9f087c0edb
F src/vdbe.h e3f43bcc27ff30b0f25a6104d0cb5657e1c4b5e1b5cd2dd2216d5bcc2156a746
F src/vdbeInt.h d299d7a19853463dac418de0d97f2dd9cb4ddb495a45c93364e2daee109ba0ef
F src/vdbeapi.c 765a0bbe01311626417de6cb743f7f25f9f98435c98a9df4bb0714d11014633d
@@ -1731,7 +1731,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
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U drh
Z b644b027a94a428792d2674b80d687cf
Z 8c642b57392b756fd19e94b953870085

2
manifest.uuid
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@@ -1 +1 @@
439c8162272795b422a0e01b01b832fbc12b39914c9632a674162af8bdecff98
4b0b4e14039469b656662312a5f80f086ede293e9ad04c7bc99a202b683a1e55

15
src/vdbe.c
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@@ -4292,7 +4292,7 @@ case OP_NotExists: /* jump, in3 */
pC = p->apCsr[pOp->p1];
assert( pC!=0 );
#ifdef SQLITE_DEBUG
pC->seekOp = 0;
pC->seekOp = OP_SeekRowid;
#endif
assert( pC->isTable );
assert( pC->eCurType==CURTYPE_BTREE );
@@ -4946,6 +4946,9 @@ case OP_NullRow: {
assert( pC->uc.pCursor!=0 );
sqlite3BtreeClearCursor(pC->uc.pCursor);
}
#ifdef SQLITE_DEBUG
if( pC->seekOp==0 ) pC->seekOp = OP_NullRow;
#endif
break;
}
@@ -5185,16 +5188,16 @@ case OP_Next: /* jump */
assert( pOp->opcode!=OP_Next || pOp->p4.xAdvance==sqlite3BtreeNext );
assert( pOp->opcode!=OP_Prev || pOp->p4.xAdvance==sqlite3BtreePrevious );
#if 0
/* The Next opcode is only used after SeekGT, SeekGE, and Rewind.
/* The Next opcode is only used after SeekGT, SeekGE, Rewind, and Found.
** The Prev opcode is only used after SeekLT, SeekLE, and Last. */
assert( pOp->opcode!=OP_Next
|| pC->seekOp==OP_SeekGT || pC->seekOp==OP_SeekGE
|| pC->seekOp==OP_Rewind || pC->seekOp==OP_Found);
|| pC->seekOp==OP_Rewind || pC->seekOp==OP_Found
|| pC->seekOp==OP_NullRow);
assert( pOp->opcode!=OP_Prev
|| pC->seekOp==OP_SeekLT || pC->seekOp==OP_SeekLE
|| pC->seekOp==OP_Last );
#endif
|| pC->seekOp==OP_Last
|| pC->seekOp==OP_NullRow);
rc = pOp->p4.xAdvance(pC->uc.pCursor, pOp->p3);
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