diff options
Diffstat (limited to 'src/vdbe.c')
| -rw-r--r-- | src/vdbe.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/src/vdbe.c b/src/vdbe.c index 18286c297..45a47756e 100644 --- a/src/vdbe.c +++ b/src/vdbe.c @@ -993,8 +993,12 @@ jump_to_p2: /* Opcode: Return P1 P2 P3 * * ** -** Jump to the next instruction after the address in register P1. After -** the jump, register P1 becomes undefined. +** Jump to the next instruction after the address stored in register P1. +** +** It used to be that after the jump, register P1 would become undefined. +** However, for the subroutine used for the inner loop of a RIGHT JOIN, +** it is useful for R1 register to be unchanged, so that is what happens +** now. ** ** P2 is not used by the byte-code engine. However, if P2 is positive ** and also less than the current address, then the "EXPLAIN" output @@ -1012,7 +1016,7 @@ case OP_Return: { /* in1 */ pIn1 = &aMem[pOp->p1]; assert( pIn1->flags==MEM_Int ); pOp = &aOp[pIn1->u.i]; - pIn1->flags = MEM_Undefined; + /* pIn1->flags = MEM_Undefined; */ break; } |