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Make sure that the optimization that set the maximum column that will be used

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on a particular query does not mistakenly change an opcode other than
OP_OpenRead or OP_OpenWrite.  In particular, make sure it does not overwrite
the P4 field of an OP_SorterOpen.

FossilOrigin-Name: b0c1ba655d69c0c46c16ea2aef4e6c9a3e6ce3fb
This commit is contained in:
drh
2012-12-03 17:04:40 +00:00
parent 4d15a0d6d5
commit fc5e546641
5 changed files with 13 additions and 10 deletions
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1
src/vdbeaux.c
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@@ -723,6 +723,7 @@ void sqlite3VdbeChangeP4(Vdbe *p, int addr, const char *zP4, int n){
addr = p->nOp - 1;
}
pOp = &p->aOp[addr];
assert( pOp->p4type==P4_NOTUSED || pOp->p4type==P4_INT32 );
freeP4(db, pOp->p4type, pOp->p4.p);
pOp->p4.p = 0;
if( n==P4_INT32 ){