[Bug]: gather 的表统计信息问题

[Teingi]

Describe the bug

同一张表，数据有很多条

Environment

obdiag 2.x
ob 4.x

Fast reproduce steps

select /*+read_consistency(weak) QUERY_TIMEOUT(60000000) */ t1.svr_ip, t1.role, t1.tenant_id,t1.database_name,t1.table_name, ifnull(t2.data_size,0) / 1073741824 as total_data_size_gb from (select tenant_id, database_name, table_name, role, svr_ip, table_id, tablet_id from oceanbase.cdb_ob_table_locations) t1 left join (select tenant_id, tablet_id, data_size from oceanbase.cdb_ob_tablet_replicas) t2 on t1.tenant_id = t2.tenant_id and t1.tablet_id = t2.tablet_id order by total_data_size_gb desc limit 50;

Expected behavior

No response

Actual behavior

No response

Additional context

No response