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Check for foreign key constraint errors prior to returning the results from

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a RETURNING clause.  See [forum:/forumpost/793beaf322|forum post 793beaf322].

FossilOrigin-Name: a818ba2ed635b91e279dde44236fc7446a33db2b46c9409b67021248c01bf4e5
This commit is contained in:
drh
2021-12-01 19:17:14 +00:00
parent 4baf43ff64
commit 3b26b2b56b
9 changed files with 52 additions and 35 deletions
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22
src/vdbe.c
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@@ -1479,24 +1479,22 @@ case OP_IntCopy: { /* out2 */
break;
}
/* Opcode: ChngCntRow P1 P2 * * *
** Synopsis: output=r[P1]
/* Opcode: FkCheck * * * * *
**
** Output value in register P1 as the chance count for a DML statement,
** due to the "PRAGMA count_changes=ON" setting. Or, if there was a
** foreign key error in the statement, trigger the error now.
** Halt with an SQLITE_CONSTRAINT error if there are any unresolved
** foreign key constraint violations. If there are no foreign key
** constraint violations, this is a no-op.
**
** This opcode is a variant of OP_ResultRow that checks the foreign key
** immediate constraint count and throws an error if the count is
** non-zero. The P2 opcode must be 1.
** FK constraint violations are also checked when the prepared statement
** exits. This opcode is used to raise foreign key constraint errors prior
** to returning results such as a row change count or the result of a
** RETURNING clause.
*/
case OP_ChngCntRow: {
assert( pOp->p2==1 );
case OP_FkCheck: {
if( (rc = sqlite3VdbeCheckFk(p,0))!=SQLITE_OK ){
goto abort_due_to_error;
}
/* Fall through to the next case, OP_ResultRow */
/* no break */ deliberate_fall_through
break;
}
/* Opcode: ResultRow P1 P2 * * *