if (part_vals == null || part_vals.size() == 0) {
try {
oldPart = ms.getPartition(dbname, name, new_part.getValues());
ms.alterPartition(dbname, name, new_part.getValues(), new_part);
for (MetaStoreEventListener listener : listeners) {
listener.onAlterPartition(new AlterPartitionEvent(oldPart, new_part, true, this));
}
} catch (InvalidObjectException e) {
throw new InvalidOperationException("alter is not possible");
} catch (NoSuchObjectException e){
//old partition does not exist
throw new InvalidOperationException("alter is not possible");
}
return;
}
//rename partition
try {
ms.openTransaction();
try {
oldPart = ms.getPartition(dbname, name, part_vals);
} catch (NoSuchObjectException e) {
// this means there is no existing partition
throw new InvalidObjectException(
"Unable to rename partition because old partition does not exist");
}
Partition check_part = null;
try {
check_part = ms.getPartition(dbname, name, new_part.getValues());
} catch(NoSuchObjectException e) {
// this means there is no existing partition
check_part = null;
}
if (check_part != null) {
throw new AlreadyExistsException("Partition already exists:" + dbname + "." + name + "." + new_part.getValues());
}
tbl = ms.getTable(dbname, name);
if (tbl == null) {
throw new InvalidObjectException(
"Unable to rename partition because table or database do not exist");
}
try {
destPath = new Path(wh.getTablePath(ms.getDatabase(dbname), name), Warehouse.makePartName(tbl.getPartitionKeys(),
new_part.getValues()));
} catch (NoSuchObjectException e) {
LOG.debug(e);
throw new InvalidOperationException(
"Unable to change partition or table. Database " + dbname + " does not exist"
+ " Check metastore logs for detailed stack." + e.getMessage());
}
if (destPath != null) {
newPartLoc = destPath.toString();
oldPartLoc = oldPart.getSd().getLocation();
srcPath = new Path(oldPartLoc);
LOG.info("srcPath:" + oldPartLoc);
LOG.info("descPath:" + newPartLoc);
srcFs = wh.getFs(srcPath);
destFs = wh.getFs(destPath);
// check that src and dest are on the same file system
if (srcFs != destFs) {
throw new InvalidOperationException("table new location " + destPath
+ " is on a different file system than the old location "
+ srcPath + ". This operation is not supported");
}
try {
srcFs.exists(srcPath); // check that src exists and also checks
if (newPartLoc.compareTo(oldPartLoc) != 0 && destFs.exists(destPath)) {
throw new InvalidOperationException("New location for this table "
+ tbl.getDbName() + "." + tbl.getTableName()
+ " already exists : " + destPath);
}
} catch (IOException e) {
Warehouse.closeFs(srcFs);
Warehouse.closeFs(destFs);
throw new InvalidOperationException("Unable to access new location "
+ destPath + " for partition " + tbl.getDbName() + "."
+ tbl.getTableName() + " " + new_part.getValues());
}
new_part.getSd().setLocation(newPartLoc);
ms.alterPartition(dbname, name, part_vals, new_part);
}
success = ms.commitTransaction();
} finally {
if (!success) {
ms.rollbackTransaction();
}
if (success && newPartLoc.compareTo(oldPartLoc) != 0) {
//rename the data directory
try{
if (srcFs.exists(srcPath)) {
//if destPath's parent path doesn't exist, we should mkdir it
Path destParentPath = destPath.getParent();
if (!wh.mkdirs(destParentPath)) {
throw new IOException("Unable to create path " + destParentPath);
}
srcFs.rename(srcPath, destPath);
LOG.info("rename done!");
}
} catch (IOException e) {
boolean revertMetaDataTransaction = false;
try {
ms.openTransaction();
ms.alterPartition(dbname, name, new_part.getValues(), oldPart);
revertMetaDataTransaction = ms.commitTransaction();
} catch (Exception e1) {
LOG.error("Reverting metadata opeation failed During HDFS operation failed", e1);
if (!revertMetaDataTransaction) {
ms.rollbackTransaction();
}
}
throw new InvalidOperationException("Unable to access old location "
+ srcPath + " for partition " + tbl.getDbName() + "."
+ tbl.getTableName() + " " + part_vals);
}
}
for (MetaStoreEventListener listener : listeners) {
listener.onAlterPartition(new AlterPartitionEvent(oldPart, new_part, true, this));
}
}
}