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[CP]opt dml update lob check changed

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skylhd
2023-11-07 12:13:56 +00:00
committed by ob-robot
parent 0bfca5dc0e
commit 8bd8e8fad9
3 changed files with 63 additions and 18 deletions
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25
src/sql/engine/dml/ob_dml_service.cpp
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@ -312,18 +312,21 @@ int ObDMLService::check_lob_column_changed(ObEvalCtx &eval_ctx,
bool new_set_has_lob_header = new_expr.obj_meta_.has_lob_header() && new_str.length() > 0;
ObLobLocatorV2 old_lob(old_str, old_set_has_lob_header);
ObLobLocatorV2 new_lob(new_str, new_set_has_lob_header);
ObLobCompareParams cmp_params;
// binary compare ignore charset
cmp_params.collation_left_ = CS_TYPE_BINARY;
cmp_params.collation_right_ = CS_TYPE_BINARY;
cmp_params.offset_left_ = 0;
cmp_params.offset_right_ = 0;
cmp_params.compare_len_ = UINT64_MAX;
cmp_params.timeout_ = timeout;
cmp_params.tx_desc_ = eval_ctx.exec_ctx_.get_my_session()->get_tx_desc();
if(old_set_has_lob_header && new_set_has_lob_header) {
if(OB_FAIL(lob_mngr->compare(old_lob, new_lob, cmp_params, result))) {
if (old_set_has_lob_header && new_set_has_lob_header) {
bool is_equal = false;
ObLobCompareParams cmp_params;
// binary compare ignore charset
cmp_params.collation_left_ = CS_TYPE_BINARY;
cmp_params.collation_right_ = CS_TYPE_BINARY;
cmp_params.offset_left_ = 0;
cmp_params.offset_right_ = 0;
cmp_params.compare_len_ = UINT64_MAX;
cmp_params.timeout_ = timeout;
cmp_params.tx_desc_ = eval_ctx.exec_ctx_.get_my_session()->get_tx_desc();
if(OB_FAIL(lob_mngr->equal(old_lob, new_lob, cmp_params, is_equal))) {
LOG_WARN("fail to compare lob", K(ret), K(old_lob), K(new_lob));
} else {
result = is_equal ? 0 : 1;
}
} else {
result = ObDatum::binary_equal(old_datum, new_datum) ? 0 : 1;