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implement estimate table row count by meta table

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This commit is contained in:
wangt1xiuyi
2023-02-24 16:02:17 +00:00
committed by ob-robot
parent 780b56301a
commit f872513c5f
14 changed files with 420 additions and 68 deletions
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11
src/sql/optimizer/ob_join_order.cpp
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@ -10722,15 +10722,14 @@ int ObJoinOrder::init_est_sel_info_for_access_path(const uint64_t table_id,
}
}
// 2. try to estimate the whole memtable
// 2. if the table row count is 0, we try refine it.
if (OB_SUCC(ret) && table_meta_info_.table_row_count_ <= 0) {
if (origin_part_cnt > 1) {
// do nothing
} else if (OB_FAIL(ObAccessPathEstimation::estimate_full_table_rowcount(
OPT_CTX, *table_partition_info_, table_meta_info_))) {
if (OB_FAIL(ObAccessPathEstimation::estimate_full_table_rowcount(OPT_CTX,
*table_partition_info_,
table_meta_info_))) {
LOG_WARN("failed to estimate full table rowcount", K(ret));
} else {
LOG_TRACE("total rowcount, mem-table without stats", K(table_meta_info_.table_row_count_));
LOG_TRACE("succeed to estimate full table rowcount", K(table_meta_info_.table_row_count_));
}
}