Fix the issue where the tablet_id is incorrect when the partition table has a single partition (#226)

Author: stuBirdFly

src/main/java/com/alipay/oceanbase/rpc/ObTableClient.java

@@ -1598,8 +1598,7 @@ private ObPair<Long, ObTableParam> getTable(String tableName, Object[] rowKey,
         TableEntry tableEntry = getOrRefreshTableEntry(tableName, refresh, waitForRefresh,
             needFetchAll);
         Row row = new Row();
-        if (tableEntry.isPartitionTable()
-            && tableEntry.getPartitionInfo().getLevel() != ObPartitionLevel.LEVEL_ZERO) {
+        if (tableEntry.isPartitionTable()) {
             List<String> curTableRowKeyNames = new ArrayList<String>();
             Map<String, Integer> tableRowKeyEle = getRowKeyElement(tableName);
             if (tableRowKeyEle != null) {
@@ -1934,8 +1933,7 @@ public List<ObPair<Long, ObTableParam>> getTables(String tableName, ObTableQuery
         Row startRow = new Row();
         Row endRow = new Row();
         // ensure the format of column names and values if the current table is a table with partition
-        if (tableEntry.isPartitionTable()
-            && tableEntry.getPartitionInfo().getLevel() != ObPartitionLevel.LEVEL_ZERO) {
+        if (tableEntry.isPartitionTable()) {
             // scanRangeColumn may be longer than start/end in prefix scanning situation
             if (scanRangeColumns == null || scanRangeColumns.size() < start.length) {
                 throw new IllegalArgumentException(

src/main/java/com/alipay/oceanbase/rpc/location/LocationUtil.java

@@ -665,10 +665,10 @@ private static TableEntry getTableEntryFromRemote(Connection connection, TableEn
             if (null != tableEntry) {
                 tableEntry.setTableEntryKey(key);
                 // TODO: check capacity flag later
+                // fetch partition info
+                fetchPartitionInfo(connection, tableEntry);
                 // fetch tablet ids when table is partition table
                 if (tableEntry.isPartitionTable()) {
-                    // fetch partition info
-                    fetchPartitionInfo(connection, tableEntry);
                     if (null != tableEntry.getPartitionInfo()) {
                         // fetch first range part
                         if (null != tableEntry.getPartitionInfo().getFirstPartDesc()) {

src/main/java/com/alipay/oceanbase/rpc/location/model/TableEntry.java

@@ -102,7 +102,9 @@ public Long getReplicaNum() {
      * Is partition table.
      */
     public boolean isPartitionTable() {
-        return this.partitionNum > 1;
+        return partitionNum > 1 || (partitionInfo != null && partitionInfo.getLevel()
+                .getIndex() > ObPartitionLevel.LEVEL_ZERO.getIndex() && partitionInfo.getLevel()
+                .getIndex() < ObPartitionLevel.UNKNOWN.getIndex());
     }
 
     /*