net.snowflake.client.jdbc.SnowflakeResultSetMetaDataV1 Maven / Gradle / Ivy

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Snowflake JDBC Driver
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/*
 * Copyright (c) 2012-2019 Snowflake Computing Inc. All rights reserved.
 */

package net.snowflake.client.jdbc;

import net.snowflake.client.core.SFException;
import net.snowflake.client.core.SFResultSetMetaData;
import net.snowflake.client.log.SFLogger;
import net.snowflake.client.log.SFLoggerFactory;

import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.List;

/**
 * Snowflake ResultSetMetaData
 */
class SnowflakeResultSetMetaDataV1 implements ResultSetMetaData, SnowflakeResultSetMetaData
{
  static final
  SFLogger logger = SFLoggerFactory.getLogger(SnowflakeResultSetMetaDataV1.class);

  private SFResultSetMetaData resultSetMetaData;

  SnowflakeResultSetMetaDataV1(SFResultSetMetaData resultSetMetaData)
  throws SnowflakeSQLException
  {
    this.resultSetMetaData = resultSetMetaData;
  }

  /**
   * @return query id
   */
  public String getQueryID() throws SQLException
  {
    return resultSetMetaData.getQueryId();
  }

  /**
   * @return list of column names
   */
  public List getColumnNames() throws SQLException
  {
    return resultSetMetaData.getColumnNames();
  }

  /**
   * @return index of the column by name, index starts from zero
   */
  public int getColumnIndex(String columnName) throws SQLException
  {
    return resultSetMetaData.getColumnIndex(columnName);
  }

  public int getInternalColumnType(int column) throws SQLException
  {
    try
    {
      return resultSetMetaData.getInternalColumnType(column);
    }
    catch (SFException ex)
    {
      throw new SnowflakeSQLException(ex.getCause(),
                                      ex.getSqlState(), ex.getVendorCode(), ex.getParams());
    }
  }

  @Override
  public  T unwrap(Class iface) throws SQLException
  {
    logger.debug("public  T unwrap(Class iface)");

    if (!iface.isInstance(this))
    {
      throw new SQLException(
          this.getClass().getName() + " not unwrappable from " + iface
              .getName());
    }
    return (T) this;
  }

  @Override
  public boolean isWrapperFor(Class iface) throws SQLException
  {
    logger.debug("public boolean isWrapperFor(Class iface)");

    return iface.isInstance(this);
  }

  @Override
  public boolean isAutoIncrement(int column) throws SQLException
  {
    return false;
  }

  @Override
  public boolean isCaseSensitive(int column) throws SQLException
  {
    return false;
  }

  @Override
  public boolean isSearchable(int column) throws SQLException
  {
    return true;
  }

  @Override
  public boolean isCurrency(int column) throws SQLException
  {
    return false;
  }

  @Override
  public boolean isReadOnly(int column) throws SQLException
  {
    return true; // metadata column is always readonly
  }

  @Override
  public boolean isWritable(int column) throws SQLException
  {
    return false; // never writable
  }

  @Override
  public boolean isDefinitelyWritable(int column) throws SQLException
  {
    return false; // never writable
  }

  @Override
  public String getColumnClassName(int column) throws SQLException
  {
    logger.debug("public String getColumnClassName(int column)");

    int type = this.getColumnType(column);

    return SnowflakeType.javaTypeToClassName(type);
  }


  /**
   * @return column count
   * @throws java.sql.SQLException if failed to get column count
   */
  @Override
  public int getColumnCount() throws SQLException
  {
    return resultSetMetaData.getColumnCount();
  }

  @Override
  public boolean isSigned(int column) throws SQLException
  {
    return resultSetMetaData.isSigned(column);
  }

  @Override
  public String getColumnLabel(int column) throws SQLException
  {
    return resultSetMetaData.getColumnLabel(column);
  }

  @Override
  public String getColumnName(int column) throws SQLException
  {
    return resultSetMetaData.getColumnName(column);
  }

  @Override
  public int getPrecision(int column) throws SQLException
  {
    return resultSetMetaData.getPrecision(column);
  }

  @Override
  public int getScale(int column) throws SQLException
  {
    return resultSetMetaData.getScale(column);
  }

  @Override
  public int getColumnType(int column) throws SQLException
  {
    try
    {
      return resultSetMetaData.getColumnType(column);
    }
    catch (SFException ex)
    {
      throw new SnowflakeSQLException(ex.getCause(),
                                      ex.getSqlState(), ex.getVendorCode(), ex.getParams());
    }
  }

  @Override
  public String getColumnTypeName(int column) throws SQLException
  {
    try
    {
      return resultSetMetaData.getColumnTypeName(column);
    }
    catch (SFException ex)
    {
      throw new SnowflakeSQLException(ex.getCause(),
                                      ex.getSqlState(), ex.getVendorCode(), ex.getParams());
    }
  }

  @Override
  public int isNullable(int column) throws SQLException
  {
    return resultSetMetaData.isNullable(column);
  }

  @Override
  public String getCatalogName(int column) throws SQLException
  {
    return resultSetMetaData.getCatalogName(column);
  }

  @Override
  public String getSchemaName(int column) throws SQLException
  {
    return resultSetMetaData.getSchemaName(column);
  }

  @Override
  public String getTableName(int column) throws SQLException
  {
    return resultSetMetaData.getTableName(column);
  }

  @Override
  public int getColumnDisplaySize(int column) throws SQLException
  {
    return resultSetMetaData.getColumnDisplaySize(column);
  }
}