[chore](scan) remove useless enable_scan_node_run_serial

be/src/runtime/runtime_state.h

@@ -460,11 +460,6 @@ class RuntimeState {
         return _query_options.__isset.enable_profile && _query_options.enable_profile;
     }
 
-    bool enable_scan_node_run_serial() const {
-        return _query_options.__isset.enable_scan_node_run_serial &&
-               _query_options.enable_scan_node_run_serial;
-    }
-
     bool enable_share_hash_table_for_broadcast_join() const {
         return _query_options.__isset.enable_share_hash_table_for_broadcast_join &&
                _query_options.enable_share_hash_table_for_broadcast_join;

fe/fe-core/src/main/java/org/apache/doris/qe/SessionVariable.java

@@ -476,8 +476,6 @@ public class SessionVariable implements Serializable, Writable {
 
     public static final String ENABLE_CTE_MATERIALIZE = "enable_cte_materialize";
 
-    public static final String ENABLE_SCAN_RUN_SERIAL = "enable_scan_node_run_serial";
-
     public static final String ENABLE_ANALYZE_COMPLEX_TYPE_COLUMN = "enable_analyze_complex_type_column";
 
     public static final String EXTERNAL_TABLE_ANALYZE_PART_NUM = "external_table_analyze_part_num";
@@ -944,12 +942,6 @@ public class SessionVariable implements Serializable, Writable {
     @VariableMgr.VarAttr(name = ENABLE_ODBC_TRANSCATION)
     public boolean enableOdbcTransaction = false;
 
-    @VariableMgr.VarAttr(name = ENABLE_SCAN_RUN_SERIAL,  description = {
-            "是否开启ScanNode串行读，以避免limit较小的情况下的读放大，可以提高查询的并发能力",
-            "Whether to enable ScanNode serial reading to avoid read amplification in cases of small limits"
-                + "which can improve query concurrency. default is false."})
-    public boolean enableScanRunSerial = false;
-
     @VariableMgr.VarAttr(name = ENABLE_SQL_CACHE)
     public boolean enableSqlCache = false;
 
@@ -2163,15 +2155,15 @@ public void setIgnoreShapePlanNodes(String ignoreShapePlanNodes) {
 
     @VariableMgr.VarAttr(name = ENABLE_ADAPTIVE_PIPELINE_TASK_SERIAL_READ_ON_LIMIT, needForward = true, description = {
         "开启后将会允许自动调整 pipeline task 的并发数。当 scan 节点没有过滤条件，且 limit 参数小于"
-            + "adaptive_pipeline_task_serial_read_on_limit 中指定的行数时，scan 的并行度将会被设置为 1",
+            + "adaptive_pipeline_task_serial_read_on_limit 中指定的行数时，scanner 的并行度将会被设置为 1",
         "When enabled, the pipeline task concurrency will be adjusted automatically. When the scan node has no filter "
             + "conditions and the limit parameter is less than the number of rows specified in "
             + "adaptive_pipeline_task_serial_read_on_limit, the parallelism of the scan will be set to 1."
     })
     public boolean enableAdaptivePipelineTaskSerialReadOnLimit = true;
 
     @VariableMgr.VarAttr(name = ADAPTIVE_PIPELINE_TASK_SERIAL_READ_ON_LIMIT, needForward = true, description = {
-        "当 enable_adaptive_pipeline_task_serial_read_on_limit 开启时，scan 的并行度将会被设置为 1 的行数阈值",
+        "当 enable_adaptive_pipeline_task_serial_read_on_limit 开启时，scanner 的并行度将会被设置为 1 的行数阈值",
             "When enable_adaptive_pipeline_task_serial_read_on_limit is enabled, "
             + "the number of rows at which the parallelism of the scan will be set to 1."
     })
@@ -2978,10 +2970,6 @@ public void setShowHiddenColumns(boolean showHiddenColumns) {
         this.showHiddenColumns = showHiddenColumns;
     }
 
-    public boolean isEnableScanRunSerial() {
-        return enableScanRunSerial;
-    }
-
     public boolean skipStorageEngineMerge() {
         return skipStorageEngineMerge;
     }
@@ -3666,7 +3654,6 @@ public TQueryOptions toThrift() {
         tResult.setTrimTailingSpacesForExternalTableQuery(trimTailingSpacesForExternalTableQuery);
         tResult.setEnableShareHashTableForBroadcastJoin(enableShareHashTableForBroadcastJoin);
         tResult.setEnableHashJoinEarlyStartProbe(enableHashJoinEarlyStartProbe);
-        tResult.setEnableScanNodeRunSerial(enableScanRunSerial);
 
         tResult.setBatchSize(batchSize);
         tResult.setDisableStreamPreaggregations(disableStreamPreaggregations);

fe/fe-core/src/main/java/org/apache/doris/statistics/util/StatisticsUtil.java

@@ -218,7 +218,6 @@ public static AutoCloseConnectContext buildConnectContext(boolean limitScan, boo
         sessionVariable.enableProfile = Config.enable_profile_when_analyze;
         sessionVariable.parallelExecInstanceNum = Config.statistics_sql_parallel_exec_instance_num;
         sessionVariable.parallelPipelineTaskNum = Config.statistics_sql_parallel_exec_instance_num;
-        sessionVariable.enableScanRunSerial = limitScan;
         sessionVariable.setQueryTimeoutS(StatisticsUtil.getAnalyzeTimeout());
         sessionVariable.insertTimeoutS = StatisticsUtil.getAnalyzeTimeout();
         sessionVariable.enableFileCache = false;

gensrc/thrift/PaloInternalService.thrift

@@ -226,8 +226,8 @@ struct TQueryOptions {
   72: optional bool enable_orc_lazy_mat = true
 
   73: optional i64 scan_queue_mem_limit
-
-  74: optional bool enable_scan_node_run_serial = false; 
+  // deprecated
+  74: optional bool enable_scan_node_run_serial = false;
 
   75: optional bool enable_insert_strict = false;