Comments (1)
den-crane
commented on September 26, 2024
Merges are eventual and may never happen. It depends on the number of inserts that happened after, the number of parts in the partition, size of parts. If the total size of input parts are greater than the maximum part size then they will never be merged.
https://clickhouse.tech/docs/en/engines/table-engines/mergetree-family/replacingmergetree/ ReplacingMergeTree is suitable for clearing out duplicate data in the background in order to save space, but it doesn’t guarantee the absence of duplicates.
Use FINAL: select ... from order_txt FINAL. https://clickhouse.com/docs/en/sql-reference/statements/select/from#final-modifier
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