heguanhui

[feature](restapi) add broker operate rest api, including ADD/DROP/DROP_ALL

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### What problem does this PR solve? This PR introduces REST APIs for scaling the broker cluster, including ADD, DROP, and DROP_ALL, which are fully compatible with SQL commands. This...

[feature](iceberg catalog) support iceberg view query

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### What problem does this PR solve? This feature addresses the issue that Doris cannot query Iceberg views. 1. Prerequisite Dependencies Iceberg version 1.7.x+ 2. Design Approach - Enhanced View...

[feature](nereids) Add SHOW FRONTEND MASTER command and API

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Implement dual access methods for master frontend node information: - SHOW FRONTEND MASTER SQL command for query interface - GET /api/frontend/master HTTP API for programmatic access - Shared utility method...

[improvement] (deitlog) Skip edit log writing when global variable value unchanged

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[improvement] (deitlog) Skip edit log writing when global variable value unchanged Avoid unnecessary edit log writes when setting global variable to the same value. This reduces disk I/O and prevents...

[improve](editlog) judge tag map if changed when modify backend to avoid unnecessary write edit log

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[improve](editlog) judge tag map if changed when modify backend to avoid unnecessary write edit log ### What problem does this PR solve? Issue Number: close #xxx Related PR: #xxx Problem...

Add wait mechanism for TPCH data loading to prevent token competition

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Add wait mechanism for TPCH data loading to prevent token competition Fix token competition issue in load-tpch-data.sh where lineitem occupies all tokens, blocking orders and partsupp imports. Add wait commands...

[Feature] (external) Support display full schema for iceberg view ddl

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Support display full schema for iceberg view ddl - Output the view location info - output the view properties info ### Release note None ### Check List (For Author) -...

[feature](restapi) add global session variables restapis

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- batch set for variables - batch get get for variables - batch unset for variables - unset all variables ### Release note support restapis to fullfil functions like show...

[Fix](cdc) Fix BE data loss caused by invalid checkpoint recovery during Flink CDC Stream Load with BE unavailable scenario ## Problem Summary: Fix data loss on BE after Flink job...