branch-1.2: [improve](backup) Add config ignore_backup_tmp_partitions

fe/fe-common/src/main/java/org/apache/doris/common/Config.java

@@ -1527,6 +1527,12 @@ public class Config extends ConfigBase {
     @ConfField(mutable = true, masterOnly = true)
     public static int max_backup_restore_job_num_per_db = 10;
 
+    /**
+     * whether to ignore temp partitions when backup, and not report exception.
+     */
+    @ConfField(mutable = true, masterOnly = true)
+    public static boolean ignore_backup_tmp_partitions = false;
+
     /**
      * Control the default max num of the instance for a user.
      */

fe/fe-core/src/main/java/org/apache/doris/backup/BackupHandler.java

@@ -328,14 +328,14 @@ private void backup(Repository repository, Database db, BackupStmt stmt) throws
             OlapTable olapTbl = (OlapTable) tbl;
             tbl.readLock();
             try {
-                if (olapTbl.existTempPartitions()) {
+                if (!Config.ignore_backup_tmp_partitions && olapTbl.existTempPartitions()) {
                     ErrorReport.reportDdlException(ErrorCode.ERR_COMMON_ERROR,
                             "Do not support backup table with temp partitions");
                 }
 
                 PartitionNames partitionNames = tblRef.getPartitionNames();
                 if (partitionNames != null) {
-                    if (partitionNames.isTemp()) {
+                    if (!Config.ignore_backup_tmp_partitions && partitionNames.isTemp()) {
                         ErrorReport.reportDdlException(ErrorCode.ERR_COMMON_ERROR,
                                 "Do not support backup temp partitions");
                     }

fe/fe-core/src/main/java/org/apache/doris/backup/BackupJob.java

@@ -448,10 +448,15 @@ private void prepareSnapshotTaskForOlapTableWithoutLock(OlapTable olapTable,
         // check backup table again
         if (backupTableRef.getPartitionNames() != null) {
             for (String partName : backupTableRef.getPartitionNames().getPartitionNames()) {
-                Partition partition = olapTable.getPartition(partName);
+                Partition partition = olapTable.getPartition(partName, false); // exclude tmp partitions
                 if (partition == null) {
-                    status = new Status(ErrCode.NOT_FOUND, "partition " + partName
-                            + " does not exist  in table" + backupTableRef.getName().getTbl());
+                    if (olapTable.getPartition(partName, true) != null) {
+                        status = new Status(ErrCode.NOT_FOUND, "backup tmp partition " + partName
+                            + " in table " + backupTableRef.getName().getTbl() + " is not supported");
+                    } else {
+                        status = new Status(ErrCode.NOT_FOUND, "partition " + partName
+                            + " does not exist in table " + backupTableRef.getName().getTbl());
+                    }
                     return;
                 }
             }
@@ -460,10 +465,10 @@ private void prepareSnapshotTaskForOlapTableWithoutLock(OlapTable olapTable,
         // create snapshot tasks
         List<Partition> partitions = Lists.newArrayList();
         if (backupTableRef.getPartitionNames() == null) {
-            partitions.addAll(olapTable.getPartitions());
+            partitions.addAll(olapTable.getPartitions()); // no temp partitions in OlapTable.getPartitions()
         } else {
             for (String partName : backupTableRef.getPartitionNames().getPartitionNames()) {
-                Partition partition = olapTable.getPartition(partName);
+                Partition partition = olapTable.getPartition(partName, false); // exclude tmp partitions
                 partitions.add(partition);
             }
         }

fe/fe-core/src/main/java/org/apache/doris/catalog/OlapTable.java

@@ -1346,6 +1346,14 @@ public OlapTable selectiveCopy(Collection<String> reservedPartitions, IndexExtSt
             }
         }
 
+        if (isForBackup) {
+            // drop all tmp partitions in copied table
+            for (Partition partition : copied.tempPartitions.getAllPartitions()) {
+                copied.partitionInfo.dropPartition(partition.getId());
+            }
+            copied.tempPartitions = new TempPartitions();
+        }
+
         if (reservedPartitions == null || reservedPartitions.isEmpty()) {
             // reserve all
             return copied;