I'd like to propose the support for Multi-table materialized view. At present, materialized views can be created on a single table, and can use pre-computed results to achieve query acceleration, but support for multi-table scenarios cannot be realized. Many query scenarios are relatively simple and the data update frequency is not high. Materialized views can effectively improve query performance and reduce data calculation
The associated issue: https://github.com/apache/doris/issues/7503 The DSIP WIKI: https://cwiki.apache.org/confluence/display/DORIS/DSIP-017%3A+Support+Multi-table+materialized+views
