Query Cost Estimation #1387
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Query Cost Estimation #1387
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…ntation for load pdf functionality
…can and Predicate Filters
…of histogram tables and refresh of table_stats table for every query
Cost estimation
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This is the initial draft for cost estimation for queries. Ideally this should be in the optimizer module but for the time being i have added the changes to the executor module, For example when you use the explain command now the command along with returning the query plan will also return the estimated number of rows which are accessed.
HLL Diagram
