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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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25
src/sql/engine/table/ob_table_scan_op.cpp
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@ -38,7 +38,6 @@ namespace sql
int FlashBackItem::set_flashback_query_info(ObEvalCtx &eval_ctx, ObDASScanRtDef &scan_rtdef) const
{
int ret = OB_SUCCESS;
int64_t time_val = transaction::ObTransVersion::INVALID_TRANS_VERSION;
ObDatum *datum = NULL;
const ObExpr *expr = flashback_query_expr_;
scan_rtdef.need_scn_ = need_scn_;
@ -57,31 +56,27 @@ int FlashBackItem::set_flashback_query_info(ObEvalCtx &eval_ctx, ObDASScanRtDef
if (ObTimestampTZType != expr->datum_meta_.type_) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("type not match", K(ret));
} else if (OB_FAIL(scan_rtdef.fb_snapshot_.convert_from_ts(datum->get_otimestamp_tz().time_us_))) {
LOG_WARN("failed to convert from ts", K(ret));
} else {
// tx snapshot version are in nanosecond
time_val = datum->get_otimestamp_tz().time_us_ * 1000;
LOG_TRACE("timestamp_val result", K(time_val), K(*datum));
LOG_TRACE("fb_snapshot_ result", K(scan_rtdef.fb_snapshot_), K(*datum));
}
} else if (TableItem::USING_SCN == flashback_query_type_) {
if (ObUInt64Type != expr->datum_meta_.type_) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("type not match", K(ret));
} else if (OB_FAIL(scan_rtdef.fb_snapshot_.convert_for_gts(datum->get_int()))) {
LOG_WARN("failed to convert for gts", K(ret));
} else {
time_val = datum->get_int();
LOG_TRACE("timestamp_val result", K(time_val), K(*datum));
LOG_TRACE("fb_snapshot_ result", K(scan_rtdef.fb_snapshot_), K(*datum));
}
}
if (OB_SUCC(ret)) {
scan_rtdef.fb_snapshot_ = time_val;
}
}
//对于同时存在hint指定的frozen_version和flashback query指定了snapshot version的情况下, 选择保留
//flashback query指定的snapshot version, 忽略hint指定的frozen_version
if (OB_SUCC(ret)) {
if (scan_rtdef.fb_snapshot_
!= transaction::ObTransVersion::INVALID_TRANS_VERSION) {
if (scan_rtdef.fb_snapshot_.is_valid()) {
scan_rtdef.frozen_version_ = transaction::ObTransVersion::INVALID_TRANS_VERSION;
} else {
/*do nothing*/
@ -2311,12 +2306,12 @@ int ObTableScanOp::report_ddl_column_checksum()
const uint64_t table_id = MY_CTDEF.scan_ctdef_.ref_table_id_;
for (int64_t i = 0; OB_SUCC(ret) && i < MY_SPEC.ddl_output_cids_.count(); ++i) {
ObDDLChecksumItem item;
item.execution_id_ = MY_SPEC.plan_->get_ddl_schema_version();
item.execution_id_ = MY_SPEC.plan_->get_ddl_execution_id();
item.tenant_id_ = MTL_ID();
item.table_id_ = table_id;
item.tablet_id_ = tablet_id.id();
item.ddl_task_id_ = MY_SPEC.plan_->get_ddl_task_id();
item.column_id_ = MY_SPEC.ddl_output_cids_.at(i);
item.task_id_ = ctx_.get_px_task_id() << 32 | curr_scan_task_id;
item.task_id_ = ctx_.get_px_sqc_id() << 48 | ctx_.get_px_task_id() << 32 | curr_scan_task_id;
item.checksum_ = i < column_checksum_.count() ? column_checksum_[i] : 0;
#ifdef ERRSIM
if (OB_SUCC(ret)) {