[improvement](statistics)Disable fetch stats for iceberg table through Iceberg api by default. (#36931) (#36999)

backport https://github.com/apache/doris/pull/36931

fe/fe-core/src/main/java/org/apache/doris/datasource/hive/HMSExternalTable.java

@@ -573,10 +573,14 @@ public class HMSExternalTable extends ExternalTable implements MTMVRelatedTableI
             case HIVE:
                 return getHiveColumnStats(colName);
             case ICEBERG:
-                return StatisticsUtil.getIcebergColumnStats(colName,
+                if (GlobalVariable.enableFetchIcebergStats) {
+                    return StatisticsUtil.getIcebergColumnStats(colName,
                         Env.getCurrentEnv().getExtMetaCacheMgr().getIcebergMetadataCache().getIcebergTable(
-                                catalog, dbName, name
+                            catalog, dbName, name
                         ));
+                } else {
+                    break;
+                }
             default:
                 LOG.warn("get column stats for dlaType {} is not supported.", dlaType);
         }

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

@@ -63,6 +63,9 @@ public final class GlobalVariable {
     public static final String DEFAULT_USING_META_CACHE_FOR_EXTERNAL_CATALOG
             = "default_using_meta_cache_for_external_catalog";
 
+    public static final String ENABLE_FETCH_ICEBERG_STATS = "enable_fetch_iceberg_stats";
+
+
     @VariableMgr.VarAttr(name = VERSION_COMMENT, flag = VariableMgr.READ_ONLY)
     public static String versionComment = "Doris version "
             + Version.DORIS_BUILD_VERSION + "-" + Version.DORIS_BUILD_SHORT_HASH;
@@ -155,6 +158,12 @@ public final class GlobalVariable {
                     "Only for compatibility with MySQL ecosystem, no practical meaning"})
     public static boolean super_read_only = true;
 
+    @VariableMgr.VarAttr(name = ENABLE_FETCH_ICEBERG_STATS, flag = VariableMgr.GLOBAL,
+            description = {
+                "当HMS catalog中的Iceberg表没有统计信息时，是否通过Iceberg Api获取统计信息",
+                "Enable fetch stats for HMS Iceberg table when it's not analyzed."})
+    public static boolean enableFetchIcebergStats = false;
+
     // Don't allow creating instance.
     private GlobalVariable() {
     }