Japanese) database solution of this kind is particularly attractive and to an extent an anomaly in a market that leans very heavily on the community. It also features custom tuned tools for a range of services serve a specific market. It is important to note that merely based on its scalability and its ability to process at speed TiDB is not particularly novel, other options in the market provide fairly similar similar features in this particular respect (Vitess and CRDB). It is instead a combination of these market-defining focuses and additional features that set TiDB as a truly attractive product for its target

Tip: If the efficiency of the default CTE queries is not good, you can use the MERGE �→ () hint to expand the CTE subquery to the outer query to improve the efficiency. 4.7.7.1.2 Recursive CTE Recursive example: • The most straightforward tuning objective solution for a resource-overloaded system is to expand its capacity, but in practice, the expansion solution might be too costly to be adopted. • When [name: Column#7, collate: utf8mb4_bin], [ �→ name: gid, collate: binary], stream_count: 8 | | ￿─ Expand_20 | 3.00 | mpp[tiflash] | | �→ level-projection:[test.bank.profit, ->Column#6, ->Column#7

Tip: If the efficiency of the default CTE queries is not good, you can use the MERGE �→ () hint to expand the CTE subquery to the outer query to improve the efficiency. 4.7.7.1.2 Recursive CTE Recursive example: • The most straightforward tuning objective solution for a resource-overloaded system is to expand its capacity, but in practice, the expansion solution might be too costly to be adopted. • When [name: Column#7, collate: utf8mb4_bin], [ �→ name: gid, collate: binary], stream_count: 8 | | ￿─ Expand_20 | 3.00 | mpp[tiflash] | | �→ level-projection:[test.bank.profit, ->Column#6, ->Column#7

Tip: If the efficiency of the default CTE queries is not good, you can use the MERGE �→ () hint to expand the CTE subquery to the outer query to improve the efficiency. 4.7.7.1.2 Recursive CTE Recursive example: • The most straightforward tuning objective solution for a resource-overloaded system is to expand its capacity, but in practice, the expansion solution might be too costly to be adopted. • When [name: Column#7, collate: utf8mb4_bin], [ �→ name: gid, collate: binary], stream_count: 8 | | ￿─ Expand_20 | 3.00 | mpp[tiflash] | | �→ level-projection:[test.bank.profit, ->Column#6, ->Column#7

Tip: If the efficiency of the default CTE queries is not good, you can use the MERGE �→ () hint to expand the CTE subquery to the outer query to improve the efficiency. 4.7.7.1.2 Recursive CTE Recursive example: • The most straightforward tuning objective solution for a resource-overloaded system is to expand its capacity, but in practice, the expansion solution might be too costly to be adopted. • When [name: Column#7, collate: utf8mb4_bin], [ �→ name: gid, collate: binary], stream_count: 8 | | ￿─ Expand_20 | 3.00 | mpp[tiflash] | | �→ level-projection:[test.bank.profit, ->Column#6, ->Column#7

Tip: If the efficiency of the default CTE queries is not good, you can use the MERGE �→ () hint to expand the CTE subquery to the outer query to improve the efficiency. 4.7.7.1.2 Recursive CTE Recursive example: • The most straightforward tuning objective solution for a resource-overloaded system is to expand its capacity, but in practice, the expansion solution might be too costly to be adopted. • When [name: Column#7, collate: utf8mb4_bin], [ �→ name: gid, collate: binary], stream_count: 8 | | ￿─ Expand_20 | 3.00 | mpp[tiflash] | | �→ level-projection:[test.bank.profit, ->Column#6, ->Column#7

this ini- tial region also start with the same number of replicas as the target region, until PD can expand them to new nodes. This is not a problem in itself, but it does lead to an awkward possibility: in

Tip: If the efficiency of the default CTE queries is not good, you can use the MERGE �→ () hint to expand the CTE subquery to the outer query to improve the efficiency. 4.7.7.1.2 Recursive CTE Recursive example: • The most straightforward tuning objective solution for a resource-overloaded system is to expand its capacity, but in practice, the expansion solution might be too costly to be adopted. • When [name: Column#7, collate: utf8mb4_bin], [ �→ name: gid, collate: binary], stream_count: 8 | | ￿─ Expand_20 | 3.00 | mpp[tiflash] | | �→ level-projection:[test.bank.profit, ->Column#6, ->Column#7

Tip: If the efficiency of the default CTE queries is not good, you can use the MERGE �→ () hint to expand the CTE subquery to the outer query to improve the efficiency. 4.7.7.1.2 Recursive CTE Recursive example: • The most straightforward tuning objective solution for a resource-overloaded system is to expand its capacity, but in practice, the expansion solution might be too costly to be adopted. • When [name: Column#7, collate: utf8mb4_bin], [ �→ name: gid, collate: binary], stream_count: 8 | | ￿─ Expand_20 | 3.00 | mpp[tiflash] | | �→ level-projection:[test.bank.profit, ->Column#6, ->Column#7

Tip: If the efficiency of the default CTE queries is not good, you can use the MERGE �→ () hint to expand the CTE subquery to the outer query to improve the efficiency. 4.7.7.1.2 Recursive CTE Recursive example: • The most straightforward tuning objective solution for a resource-overloaded system is to expand its capacity, but in practice, the expansion solution might be too costly to be adopted. • When [name: Column#7, collate: utf8mb4_bin], [ �→ name: gid, collate: binary], stream_count: 8 | | ￿─ Expand_20 | 3.00 | mpp[tiflash] | | �→ level-projection:[test.bank.profit, ->Column#6, ->Column#7