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[FOREIGN KEY] fix the bug about meet invalid conflict during checking child table which without index

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This commit is contained in:
YangEfei
2023-09-14 23:47:53 +00:00
committed by ob-robot
parent 098c6384d4
commit f00019cb7c
19 changed files with 307 additions and 184 deletions
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54
src/sql/engine/dml/ob_table_modify_op.cpp
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@ -87,6 +87,8 @@ int ForeignKeyHandle::do_handle(ObTableModifyOp &op,
LOG_WARN("is_self_ref_row failed", K(ret), K(old_row), K(fk_arg));
} else if (new_row.empty() && is_self_ref && op.is_fk_nested_session()) {
// delete self refercnced row should not cascade delete.
} else if (OB_FAIL(check_exist_inner_sql(op, fk_arg, old_row, true, true))) {
LOG_WARN("check exist before cascade failed", K(ret), K(fk_arg), K(old_row));
} else if (OB_FAIL(cascade(op, fk_arg, old_row, new_row))) {
LOG_WARN("failed to cascade", K(ret), K(fk_arg), K(old_row), K(new_row));
} else if (!new_row.empty() && is_self_ref) {
@ -114,7 +116,9 @@ int ForeignKeyHandle::do_handle(ObTableModifyOp &op,
}
}
} else if (ACTION_SET_NULL == fk_arg.ref_action_) {
if (OB_FAIL(set_null(op, fk_arg, old_row))) {
if (OB_FAIL(check_exist_inner_sql(op, fk_arg, old_row, true, true))) {
LOG_WARN("check exist before cascade failed", K(ret), K(fk_arg), K(old_row));
} else if (OB_FAIL(set_null(op, fk_arg, old_row))) {
LOG_WARN("failed to perform set null for foreign key", K(ret));
}
}
@ -159,20 +163,24 @@ int ForeignKeyHandle::check_exist(ObTableModifyOp &modify_op, const ObForeignKey
const ObExprPtrIArray &row, ObForeignKeyChecker *fk_checker, bool expect_zero)
{
int ret = OB_SUCCESS;
DEBUG_SYNC(BEFORE_FOREIGN_KEY_CONSTRAINT_CHECK);
if (!expect_zero) {
ret = check_exist_scan_task(modify_op, fk_arg, row, fk_checker, expect_zero);
ret = check_exist_scan_task(modify_op, fk_arg, row, fk_checker);
} else {
ret = check_exist_inner_sql(modify_op, fk_arg, row, expect_zero);
if (OB_FAIL(check_exist_inner_sql(modify_op, fk_arg, row, expect_zero, true))) {
LOG_WARN("check exist and iter uncommmited row meet failed", K(ret));
} else if (OB_FAIL(check_exist_inner_sql(modify_op, fk_arg, row, expect_zero, false))) {
LOG_WARN("check exist and iter commmited row meet failed", K(ret));
}
}
return ret;
}
int ForeignKeyHandle::check_exist_scan_task(ObTableModifyOp &modify_op, const ObForeignKeyArg &fk_arg,
const ObExprPtrIArray &row, ObForeignKeyChecker *fk_checker, bool expect_zero)
const ObExprPtrIArray &row, ObForeignKeyChecker *fk_checker)
{
int ret = OB_SUCCESS;
bool has_result = false;
DEBUG_SYNC(BEFORE_FOREIGN_KEY_CONSTRAINT_CHECK);
if (OB_ISNULL(fk_checker)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("foreign key checker is nullptr", K(ret));
@ -189,16 +197,16 @@ int ForeignKeyHandle::check_exist_scan_task(ObTableModifyOp &modify_op, const Ob
}
int ForeignKeyHandle::check_exist_inner_sql(ObTableModifyOp &op,
const ObForeignKeyArg &fk_arg,
const ObExprPtrIArray &row,
bool expect_zero)
const ObForeignKeyArg &fk_arg,
const ObExprPtrIArray &row,
bool expect_zero,
bool iter_uncommitted_row)
{
DEBUG_SYNC(BEFORE_FOREIGN_KEY_CONSTRAINT_CHECK);
int ret = OB_SUCCESS;
static const char *SELECT_FMT_MYSQL =
"select /*+ no_parallel */ 1 from `%.*s`.`%.*s` where %.*s limit 2";
"select /*+ no_parallel */ 1 from `%.*s`.`%.*s` where %.*s limit 2 for update";
static const char *SELECT_FMT_ORACLE =
"select /*+ no_parallel */ 1 from \"%.*s\".\"%.*s\" where %.*s and rownum <= 2";
"select /*+ no_parallel */ 1 from \"%.*s\".\"%.*s\" where %.*s and rownum <= 2 for update";
const char *select_fmt = lib::is_mysql_mode() ? SELECT_FMT_MYSQL : SELECT_FMT_ORACLE;
ObArenaAllocator alloc(ObModIds::OB_MODULE_PAGE_ALLOCATOR,
OB_MALLOC_NORMAL_BLOCK_SIZE,
@ -232,6 +240,9 @@ int ForeignKeyHandle::check_exist_inner_sql(ObTableModifyOp &op,
stmt_buf[stmt_pos++] = 0;
}
if (OB_SUCC(ret) && stmt_pos > 0) {
if (iter_uncommitted_row) {
op.get_exec_ctx().get_das_ctx().iter_uncommitted_row_ = true;
}
LOG_DEBUG("foreign_key_check_exist", "stmt", stmt_buf, K(row), K(fk_arg));
SMART_VAR(ObMySQLProxy::MySQLResult, res) {
if (OB_FAIL(op.begin_nested_session(fk_arg.is_self_ref_))) {
@ -282,14 +293,16 @@ int ForeignKeyHandle::check_exist_inner_sql(ObTableModifyOp &op,
* is true, then is_zero is false, need to exclude the case of self reference and
* only affect one row. other cases return OB_ERR_ROW_IS_REFERENCED.
*/
if (OB_FAIL(is_self_ref_row(op.get_eval_ctx(), row, fk_arg, is_self_ref))) {
LOG_WARN("is_self_ref_row failed", K(ret), K(row), K(fk_arg));
} else if (is_zero && !is_self_ref) {
ret = OB_ERR_NO_REFERENCED_ROW;
LOG_WARN("parent row is not exist", K(ret), K(fk_arg), K(row));
} else if (!is_zero) {
ret = OB_ERR_ROW_IS_REFERENCED;
LOG_WARN("child row is exist", K(ret), K(fk_arg), K(row));
if (!iter_uncommitted_row) {
if (OB_FAIL(is_self_ref_row(op.get_eval_ctx(), row, fk_arg, is_self_ref))) {
LOG_WARN("is_self_ref_row failed", K(ret), K(row), K(fk_arg));
} else if (is_zero && !is_self_ref) {
ret = OB_ERR_NO_REFERENCED_ROW;
LOG_WARN("parent row is not exist", K(ret), K(fk_arg), K(row));
} else if (!is_zero) {
ret = OB_ERR_ROW_IS_REFERENCED;
LOG_WARN("child row is exist", K(ret), K(fk_arg), K(row));
}
}
}
}
@ -318,6 +331,8 @@ int ForeignKeyHandle::check_exist_inner_sql(ObTableModifyOp &op,
}
}
}
op.get_exec_ctx().get_das_ctx().iter_uncommitted_row_ = false;
return ret;
}
@ -1293,6 +1308,7 @@ int ObTableModifyOp::inner_get_next_row()
int ObTableModifyOp::perform_batch_fk_check()
{
DEBUG_SYNC(BEFORE_FOREIGN_KEY_CONSTRAINT_CHECK);
int ret = OB_SUCCESS;
for (int64_t i = 0; OB_SUCC(ret) && i < fk_checkers_.count(); ++i) {
bool all_has_result = false;