Fix partition name NPE and sample for all table during auto analyze.

Author: Jibing-Li

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

@@ -1430,7 +1430,7 @@ public void setEnableLeftZigZag(boolean enableLeftZigZag) {
                             + "When enable_auto_sample is enabled, tables"
                             + "larger than this value will automatically collect "
                             + "statistics through sampling"})
-    public long hugeTableLowerBoundSizeInBytes = 5L * 1024 * 1024 * 1024;
+    public long hugeTableLowerBoundSizeInBytes = 0;
 
     @VariableMgr.VarAttr(name = HUGE_TABLE_AUTO_ANALYZE_INTERVAL_IN_MILLIS, flag = VariableMgr.GLOBAL,
             description = {"控制对大表的自动ANALYZE的最小时间间隔，"

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

@@ -61,7 +61,11 @@ public OlapAnalysisTask(AnalysisInfo info) {
 
     public void doExecute() throws Exception {
         Set<String> partitionNames = info.colToPartitions.get(info.colName);
-        if (partitionNames.isEmpty()) {
+        if (partitionNames == null || partitionNames.isEmpty()) {
+            if (partitionNames == null) {
+                LOG.warn("partitionNames for column {} is null. ColToPartitions:[{}]",
+                        info.colName, info.colToPartitions);
+            }
             StatsId statsId = new StatsId(concatColumnStatsId(), info.catalogId, info.dbId,
                     info.tblId, info.indexId, info.colName, null);
             job.appendBuf(this, Arrays.asList(new ColStatsData(statsId)));

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

@@ -86,7 +86,7 @@ public class StatisticConstants {
     public static final int INSERT_MERGE_ITEM_COUNT = 200;
 
     public static final long HUGE_TABLE_DEFAULT_SAMPLE_ROWS = 4194304;
-    public static final long HUGE_TABLE_LOWER_BOUND_SIZE_IN_BYTES = 5L * 1024 * 1024 * 1024;
+    public static final long HUGE_TABLE_LOWER_BOUND_SIZE_IN_BYTES = 0;
 
     public static final long HUGE_TABLE_AUTO_ANALYZE_INTERVAL_IN_MILLIS = TimeUnit.HOURS.toMillis(12);
 

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

@@ -148,7 +148,7 @@ protected boolean skip(TableIf table) {
 
     protected void createAnalyzeJobForTbl(DatabaseIf<? extends TableIf> db,
             List<AnalysisInfo> analysisInfos, TableIf table) {
-        AnalysisMethod analysisMethod = table.getDataSize(true) > StatisticsUtil.getHugeTableLowerBoundSizeInBytes()
+        AnalysisMethod analysisMethod = table.getDataSize(true) >= StatisticsUtil.getHugeTableLowerBoundSizeInBytes()
                 ? AnalysisMethod.SAMPLE : AnalysisMethod.FULL;
         AnalysisInfo jobInfo = new AnalysisInfoBuilder()
                 .setJobId(Env.getCurrentEnv().getNextId())