[HUDI-5097] Fix partition reading without partition fields table conf…

…ig (apache#7069)

Revert to FSUtils.getAllPartitionPaths to load partitions properly. Details in apache#6016 (comment)

Only for 0.12.2 to keep behavior consistent over patch releases

hudi-common/src/main/java/org/apache/hudi/BaseHoodieTableFileIndex.java

@@ -186,7 +186,7 @@ protected List<PartitionPath> getAllQueryPartitionPaths() {
 
     // Load all the partition path from the basePath, and filter by the query partition path.
     // TODO load files from the queryRelativePartitionPaths directly.
-    List<String> matchedPartitionPaths = getAllPartitionPathsUnchecked()
+    List<String> matchedPartitionPaths = FSUtils.getAllPartitionPaths(engineContext, metadataConfig, basePath.toString())
         .stream()
         .filter(path -> queryRelativePartitionPaths.stream().anyMatch(path::startsWith))
         .collect(Collectors.toList());
@@ -331,14 +331,6 @@ private Map<String, FileStatus[]> getAllFilesInPartitionsUnchecked(Collection<St
     }
   }
 
-  private List<String> getAllPartitionPathsUnchecked() {
-    try {
-      return isPartitionedTable() ? tableMetadata.getAllPartitionPaths() : Collections.singletonList("");
-    } catch (IOException e) {
-      throw new HoodieIOException("Failed to fetch partition paths for a table", e);
-    }
-  }
-
   private void validate(HoodieTimeline activeTimeline, Option<String> queryInstant) {
     if (shouldValidateInstant) {
       if (queryInstant.isPresent() && !activeTimeline.containsInstant(queryInstant.get())) {
@@ -366,10 +358,6 @@ private void resetTableMetadata(HoodieTableMetadata newTableMetadata) {
     tableMetadata = newTableMetadata;
   }
 
-  private boolean isPartitionedTable() {
-    return partitionColumns.length > 0 || HoodieTableMetadata.isMetadataTable(basePath.toString());
-  }
-
   public static final class PartitionPath {
 
     final String path;