本文整理了Java中org.apache.hadoop.hive.ql.metadata.Hive.getFunction()方法的一些代码示例，展示了Hive.getFunction()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Hive.getFunction()方法的具体详情如下：
包路径：org.apache.hadoop.hive.ql.metadata.Hive
类名称：Hive
方法名：getFunction

Hive.getFunction介绍

暂无

代码示例

代码示例来源：origin: apache/hive

public Tuple<org.apache.hadoop.hive.metastore.api.Function> function(final String name)
  throws HiveException {
 return new Tuple<>(functionForSpec, () -> db.getFunction(dbName, name));
}

代码示例来源：origin: com.facebook.presto.hive/hive-apache

public static void reloadFunctions() throws HiveException {
 Hive db = Hive.get();
 for (String dbName : db.getAllDatabases()) {
  for (String functionName : db.getFunctions(dbName, "*")) {
   Function function = db.getFunction(dbName, functionName);
   try {
  FunctionRegistry.registerPermanentFunction(
    FunctionUtils.qualifyFunctionName(functionName, dbName), function.getClassName(),
    false, FunctionTask.toFunctionResource(function.getResourceUris()));
   } catch (Exception e) {
    LOG.warn("Failed to register persistent function " +
      functionName + ":" + function.getClassName() + ". Ignore and continue.");
   }
  }
 }
}

代码示例来源：origin: apache/hive

private boolean isFunctionAlreadyLoaded(Path funcDumpRoot) throws HiveException, IOException {
 Path metadataPath = new Path(funcDumpRoot, EximUtil.METADATA_NAME);
 FileSystem fs = FileSystem.get(metadataPath.toUri(), context.hiveConf);
 MetaData metadata = EximUtil.readMetaData(fs, metadataPath);
 Function function;
 try {
  String dbName = StringUtils.isBlank(dbNameToLoadIn) ? metadata.function.getDbName() : dbNameToLoadIn;
  function = context.hiveDb.getFunction(dbName, metadata.function.getFunctionName());
 } catch (HiveException e) {
  if (e.getCause() instanceof NoSuchObjectException) {
   return false;
  }
  throw e;
 }
 return (function != null);
}

代码示例来源：origin: apache/hive

/**
  * This is called outside of the lock. Some of the methods that are called transitively by
  * this (e.g. addFunction) will take the lock again and then release it, which is ok.
  */
 private FunctionInfo getFunctionInfoFromMetastoreNoLock(String functionName, HiveConf conf) {
  try {
   String[] parts = FunctionUtils.getQualifiedFunctionNameParts(functionName);
   Function func = Hive.get(conf).getFunction(parts[0].toLowerCase(), parts[1]);
   if (func == null) {
    return null;
   }
   // Found UDF in metastore - now add it to the function registry.
   FunctionInfo fi = registerPermanentFunction(functionName, func.getClassName(), true,
     FunctionTask.toFunctionResource(func.getResourceUris()));
   if (fi == null) {
    LOG.error(func.getClassName() + " is not a valid UDF class and was not registered");
    return null;
   }
   return fi;
  } catch (Throwable e) {
   LOG.info("Unable to look up " + functionName + " in metastore", e);
  }
  return null;
 }
}

代码示例来源：origin: apache/drill

/**
  * This is called outside of the lock. Some of the methods that are called transitively by
  * this (e.g. addFunction) will take the lock again and then release it, which is ok.
  */
 private FunctionInfo getFunctionInfoFromMetastoreNoLock(String functionName, HiveConf conf) {
  try {
   String[] parts = FunctionUtils.getQualifiedFunctionNameParts(functionName);
   Function func = Hive.get(conf).getFunction(parts[0].toLowerCase(), parts[1]);
   if (func == null) {
    return null;
   }
   // Found UDF in metastore - now add it to the function registry.
   FunctionInfo fi = registerPermanentFunction(functionName, func.getClassName(), true,
     FunctionTask.toFunctionResource(func.getResourceUris()));
   if (fi == null) {
    LOG.error(func.getClassName() + " is not a valid UDF class and was not registered");
    return null;
   }
   return fi;
  } catch (Throwable e) {
   LOG.info("Unable to look up " + functionName + " in metastore", e);
  }
  return null;
 }
}