diff options
Diffstat (limited to 'src/vdbe.c')
| -rw-r--r-- | src/vdbe.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/vdbe.c b/src/vdbe.c index 57cbf864f..a132fd67c 100644 --- a/src/vdbe.c +++ b/src/vdbe.c @@ -2502,6 +2502,24 @@ case OP_IsNull: { /* same as TK_ISNULL, jump, in1 */ break; } +/* Opcode: ZeroOrNull P1 P2 P3 * * +** Synopsis: r[P2] = (P1,P3 NOT NULL) ? 0 : NULL; +** +** If both registers P1 and P3 are NOT NULL, then store a zero in +** register P2. If either register P1 or register P3 or both contain +** a NULL then store a NULL in register P2. +*/ +case OP_ZeroOrNull: { /* in1, out2, in3 */ + if( (aMem[pOp->p1].flags & MEM_Null)!=0 + || (aMem[pOp->p3].flags & MEM_Null)!=0 + ){ + sqlite3VdbeMemSetNull(aMem + pOp->p2); + }else{ + sqlite3VdbeMemSetInt64(aMem + pOp->p2, 0); + } + break; +} + /* Opcode: NotNull P1 P2 * * * ** Synopsis: if r[P1]!=NULL goto P2 ** |