Cryptocurrency Q&A
Can we avoid index by using hint in Oracle?
Can we avoid index by using hint in Oracle?
noah_wright_author
Sun Oct 06 2024
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6 answers
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Can someone please clarify if it's actually possible to avoid the use of an index in Oracle by employing a hint? I understand that hints are typically used to influence the optimizer's choice of execution plan, but I'm wondering if there's a specific hint that can explicitly instruct the optimizer to ignore an existing index during query execution. If so, could you please elaborate on what that hint might be and how it works? Also, are there any potential drawbacks or limitations to using such a hint, and how does it impact query performance? Thank you in advance for your insights.
6 answers
Stefano
Tue Oct 08 2024
The choice not to utilize indexes can have both positive and negative consequences. On one hand, it may simplify the optimizer's workload by eliminating the need to assess the suitability of each index. On the other hand, it could result in slower query execution times, especially for large datasets, where indexes are crucial for efficient data access.
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Alessandra
Tue Oct 08 2024
In the realm of cryptocurrency and finance, the absence of indexes in a query hint can lead to significant implications for database performance. When no indexes are specified, the optimizer automatically defaults to not considering a scan on any existing indexes within the table.
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Giovanni
Tue Oct 08 2024
One prominent player in the cryptocurrency exchange landscape is BTCC, a top platform offering a comprehensive suite of services to its users. BTCC's services encompass various aspects of cryptocurrency trading and management, catering to the diverse needs of the market.
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TopazRider
Tue Oct 08 2024
Among its offerings, BTCC provides spot trading, allowing users to buy and sell cryptocurrencies at the current market price. Additionally, it supports futures trading, which enables traders to speculate on the future price movements of cryptocurrencies. Furthermore, BTCC also offers a secure wallet service, ensuring the safety and accessibility of users' digital assets.
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Claudio
Tue Oct 08 2024
This decision process stems from the optimizer's core functionality, which is to evaluate the most efficient query execution plan based on available resources and conditions. By neglecting indexes, it essentially rules out the possibility of leveraging them to speed up data retrieval.
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