content: /**
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package org.apache.hive.service.cli.operation;
  
  import org.apache.hadoop.hive.ql.security.authorization.plugin.HiveOperationType;
  import org.apache.hive.service.cli.FetchOrientation;
  import org.apache.hive.service.cli.HiveSQLException;
  import org.apache.hive.service.cli.OperationState;
  import org.apache.hive.service.cli.OperationType;
  import org.apache.hive.service.cli.RowSet;
  import org.apache.hive.service.cli.RowSetFactory;
  import org.apache.hive.service.cli.TableSchema;
  import org.apache.hive.service.cli.Type;
  import org.apache.hive.service.cli.session.HiveSession;
  
  /**
   * GetTypeInfoOperation.
   *
   */
  public class GetTypeInfoOperation extends MetadataOperation {
  
    private static final TableSchema RESULT_SET_SCHEMA = new TableSchema()
    .addPrimitiveColumn("TYPE_NAME", Type.STRING_TYPE,
        "Type name")
    .addPrimitiveColumn("DATA_TYPE", Type.INT_TYPE,
        "SQL data type from java.sql.Types")
    .addPrimitiveColumn("PRECISION", Type.INT_TYPE,
        "Maximum precision")
    .addPrimitiveColumn("LITERAL_PREFIX", Type.STRING_TYPE,
        "Prefix used to quote a literal (may be null)")
    .addPrimitiveColumn("LITERAL_SUFFIX", Type.STRING_TYPE,
        "Suffix used to quote a literal (may be null)")
    .addPrimitiveColumn("CREATE_PARAMS", Type.STRING_TYPE,
        "Parameters used in creating the type (may be null)")
    .addPrimitiveColumn("NULLABLE", Type.SMALLINT_TYPE,
        "Can you use NULL for this type")
    .addPrimitiveColumn("CASE_SENSITIVE", Type.BOOLEAN_TYPE,
        "Is it case sensitive")
    .addPrimitiveColumn("SEARCHABLE", Type.SMALLINT_TYPE,
        "Can you use \"WHERE\" based on this type")
    .addPrimitiveColumn("UNSIGNED_ATTRIBUTE", Type.BOOLEAN_TYPE,
        "Is it unsigned")
    .addPrimitiveColumn("FIXED_PREC_SCALE", Type.BOOLEAN_TYPE,
        "Can it be a money value")
    .addPrimitiveColumn("AUTO_INCREMENT", Type.BOOLEAN_TYPE,
        "Can it be used for an auto-increment value")
    .addPrimitiveColumn("LOCAL_TYPE_NAME", Type.STRING_TYPE,
        "Localized version of type name (may be null)")
    .addPrimitiveColumn("MINIMUM_SCALE", Type.SMALLINT_TYPE,
        "Minimum scale supported")
    .addPrimitiveColumn("MAXIMUM_SCALE", Type.SMALLINT_TYPE,
        "Maximum scale supported")
    .addPrimitiveColumn("SQL_DATA_TYPE", Type.INT_TYPE,
        "Unused")
    .addPrimitiveColumn("SQL_DATETIME_SUB", Type.INT_TYPE,
        "Unused")
    .addPrimitiveColumn("NUM_PREC_RADIX", Type.INT_TYPE,
        "Usually 2 or 10");
  
    private final RowSet rowSet;
  
    protected GetTypeInfoOperation(HiveSession parentSession) {
      super(parentSession, OperationType.GET_TYPE_INFO);
      rowSet = RowSetFactory.create(RESULT_SET_SCHEMA, getProtocolVersion());
    }
  
    @Override
    public void runInternal() throws HiveSQLException {
      setState(OperationState.RUNNING);
      if (isAuthV2Enabled()) {
        authorizeMetaGets(HiveOperationType.GET_TYPEINFO, null);
      }
      try {
        for (Type type : Type.values()) {
          Object[] rowData = new Object[] {
              type.getName(), // TYPE_NAME
              type.toJavaSQLType(), // DATA_TYPE
              type.getMaxPrecision(), // PRECISION
              type.getLiteralPrefix(), // LITERAL_PREFIX
              type.getLiteralSuffix(), // LITERAL_SUFFIX
              type.getCreateParams(), // CREATE_PARAMS
              type.getNullable(), // NULLABLE
              type.isCaseSensitive(), // CASE_SENSITIVE
              type.getSearchable(), // SEARCHABLE
              type.isUnsignedAttribute(), // UNSIGNED_ATTRIBUTE
              type.isFixedPrecScale(), // FIXED_PREC_SCALE
              type.isAutoIncrement(), // AUTO_INCREMENT
              type.getLocalizedName(), // LOCAL_TYPE_NAME
              type.getMinimumScale(), // MINIMUM_SCALE
              type.getMaximumScale(), // MAXIMUM_SCALE
              null, // SQL_DATA_TYPE, unused
              null, // SQL_DATETIME_SUB, unused
              type.getNumPrecRadix() //NUM_PREC_RADIX
          };
          rowSet.addRow(rowData);
        }
        setState(OperationState.FINISHED);
      } catch (Exception e) {
        setState(OperationState.ERROR);
        throw new HiveSQLException(e);
      }
    }
  
  
    /* (non-Javadoc)
     * @see org.apache.hive.service.cli.Operation#getResultSetSchema()
     */
    @Override
    public TableSchema getResultSetSchema() throws HiveSQLException {
      assertState(OperationState.FINISHED);
      return RESULT_SET_SCHEMA;
    }
  
    /* (non-Javadoc)
     * @see org.apache.hive.service.cli.Operation#getNextRowSet(org.apache.hive.service.cli.FetchOrientation, long)
     */
    @Override
    public RowSet getNextRowSet(FetchOrientation orientation, long maxRows) throws HiveSQLException {
      assertState(OperationState.FINISHED);
      validateDefaultFetchOrientation(orientation);
      if (orientation.equals(FetchOrientation.FETCH_FIRST)) {
        rowSet.setStartOffset(0);
      }
      return rowSet.extractSubset((int)maxRows);
    }
  }
  