DaeMyung Kang created TAJO-1570:
-----------------------------------

             Summary: CatalogUtil newSimpleDataTypeArray should use 
newSimpleDataType
                 Key: TAJO-1570
                 URL: https://issues.apache.org/jira/browse/TAJO-1570
             Project: Tajo
          Issue Type: Improvement
            Reporter: DaeMyung Kang
            Assignee: DaeMyung Kang
            Priority: Minor


It is better CatalogUtil's newSimpleDataTypeArray method use newSimpleDataType. 
Because their purpose is the same. 
and it is efficient when someone change newSimpleDataType method.

```java
   public static DataType [] newSimpleDataTypeArray(Type... types) {
     DataType [] dataTypes = new DataType[types.length];
     for (int i = 0; i < types.length; i++) {
      dataTypes[i] = DataType.newBuilder().setType(types[i]).build();
     }
     return dataTypes;
   }
```



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