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[SCN REFACTOR] replace flash back snapshot and remove read snapshot session

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This commit is contained in:
wangt1xiuyi
2022-11-28 01:54:50 +00:00
committed by ob-robot
parent c4c13f6296
commit 11485d6a98
268 changed files with 6763 additions and 7737 deletions
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10
src/sql/ob_sql_trans_control.cpp
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@ -589,13 +589,9 @@ int ObSqlTransControl::stmt_setup_snapshot_(ObSQLSessionInfo *session,
int ret = OB_SUCCESS;
auto cl = plan_ctx->get_consistency_level();
auto &snapshot = das_ctx.get_snapshot();
palf::SCN snapshot_version;
if (session->get_read_snapshot_version() > 0) {
if (OB_FAIL(snapshot_version.convert_for_lsn_allocator(session->get_read_snapshot_version()))) {
TRANS_LOG(WARN, "convert for lsn fail", K(session->get_read_snapshot_version()));
}
snapshot.init_special_read(snapshot_version);
} else if (cl == ObConsistencyLevel::WEAK || cl == ObConsistencyLevel::FROZEN) {
if ((cl == ObConsistencyLevel::WEAK || cl == ObConsistencyLevel::FROZEN)
&& !plan->is_contain_inner_table()) {
palf::SCN snapshot_version;
if (OB_FAIL(txs->get_weak_read_snapshot_version(snapshot_version))) {
TRANS_LOG(WARN, "get weak read snapshot fail", KPC(txs));
} else {