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Overview
| Comment: | Suppress the display of the P4 operand in EXPLAIN output when an opcode has been converted into a No-op. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: | 9f8297f862a110ded686d091854fae20 |
| User & Date: | drh 2016-01-20 02:36:12 |
Context
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2016-01-20
| ||
| 03:36 | Performance improvement in sqlite3DbMallocRaw(). check-in: ff8eadbe user: drh tags: trunk | |
| 02:36 | Suppress the display of the P4 operand in EXPLAIN output when an opcode has been converted into a No-op. check-in: 9f8297f8 user: drh tags: trunk | |
| 02:21 | Remove an unnecessary memset() from the symbol name resolver. check-in: da527dda user: drh tags: trunk | |
Changes
Changes to src/vdbeaux.c.
846 847 848 849 850 851 852 853 854 855 856 857 858 859 |
int sqlite3VdbeChangeToNoop(Vdbe *p, int addr){
VdbeOp *pOp;
if( p->db->mallocFailed ) return 0;
assert( addr>=0 && addr<p->nOp );
pOp = &p->aOp[addr];
freeP4(p->db, pOp->p4type, pOp->p4.p);
pOp->p4type = P4_NOTUSED;
pOp->opcode = OP_Noop;
return 1;
}
/*
** If the last opcode is "op" and it is not a jump destination,
** then remove it. Return true if and only if an opcode was removed.
|
> |
846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 |
int sqlite3VdbeChangeToNoop(Vdbe *p, int addr){
VdbeOp *pOp;
if( p->db->mallocFailed ) return 0;
assert( addr>=0 && addr<p->nOp );
pOp = &p->aOp[addr];
freeP4(p->db, pOp->p4type, pOp->p4.p);
pOp->p4type = P4_NOTUSED;
pOp->p4.z = 0;
pOp->opcode = OP_Noop;
return 1;
}
/*
** If the last opcode is "op" and it is not a jump destination,
** then remove it. Return true if and only if an opcode was removed.
|