Unverified50% confidenceFactExact time
The EXPLAIN command makes the database return the query's execution plan without actually executing the query, and can be used to check for performance hazards such as full table scans and Cartesian products.
1
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50%
Confidence
Long-term
Relevance
10/18/2026
First Seen
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Related Claims
Unverified探针查询是在正式执行前用低成本方式验证SQL可执行性的手段，常见策略包括EXPLAIN分析、LIMIT 0/1查询、DRY RUN模式77% similarUnverifiedEmbedding-based query deduplication encodes the SQL or the parsed intent into a vector before query execution, retrieves whether there is a semantically equivalent recent request, and returns the cached result if the underlying parameters match within the freshness window.77% similarUnverifiedSQLite's EXPLAIN QUERY PLAN describes a query's execution strategy at a higher level, such as whether an index is used or a full table scan is performed.76% similarUnverifiedDatabricks' Query History records the execution plan, number of rows scanned, and time elapsed for each SQL statement, and can be used to diagnose full table scans, data skew, or join strategy issues.75% similarUnverifiedThe database field has long separated query planning from query execution, allowing the planner to complete optimal path calculation offline before execution.75% similar
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