Catalog Operations

/**
 * Catalog implementation for Hive metastore integration
 * Extends AbstractCatalog to provide Hive-specific metadata operations
 */
public class HiveCatalog extends AbstractCatalog {
    /**
     * Creates a new HiveCatalog instance with minimal configuration
     * @param catalogName - Name for this catalog instance
     * @param defaultDatabase - Default database name (can be null, defaults to "default")
     * @param hiveConfDir - Path to directory containing hive-site.xml (can be null)
     */
    public HiveCatalog(String catalogName, String defaultDatabase, String hiveConfDir);
    
    /**
     * Creates a new HiveCatalog instance with Hive version
     * @param catalogName - Name for this catalog instance
     * @param defaultDatabase - Default database name (can be null, defaults to "default")
     * @param hiveConfDir - Path to directory containing hive-site.xml (can be null)
     * @param hiveVersion - Hive version string (e.g., "2.3.6", can be null for auto-detection)
     */
    public HiveCatalog(String catalogName, String defaultDatabase, String hiveConfDir, String hiveVersion);
    
    /**
     * Creates a new HiveCatalog instance with full configuration
     * @param catalogName - Name for this catalog instance
     * @param defaultDatabase - Default database name (can be null, defaults to "default")
     * @param hiveConfDir - Path to directory containing hive-site.xml (can be null)
     * @param hadoopConfDir - Path to Hadoop configuration directory (can be null)
     * @param hiveVersion - Hive version string (e.g., "2.3.6", can be null for auto-detection)
     */
    public HiveCatalog(String catalogName, String defaultDatabase, String hiveConfDir, String hadoopConfDir, String hiveVersion);
    
    /**
     * Creates a new HiveCatalog instance with pre-configured HiveConf
     * @param catalogName - Name for this catalog instance
     * @param defaultDatabase - Default database name (can be null, defaults to "default")
     * @param hiveConf - Pre-configured HiveConf instance (can be null)
     * @param hiveVersion - Hive version string (e.g., "2.3.6", can be null for auto-detection)
     */
    public HiveCatalog(String catalogName, String defaultDatabase, HiveConf hiveConf, String hiveVersion);
    
    /**
     * Opens connection to Hive metastore
     * Must be called before using catalog operations
     * @throws CatalogException if connection fails
     */
    public void open() throws CatalogException;
    
    /**
     * Closes connection to Hive metastore
     * Should be called when catalog is no longer needed
     * @throws CatalogException if close operation fails
     */
    public void close() throws CatalogException;
}

/**
 * List all databases in the Hive metastore
 * @return List of database names
 * @throws CatalogException if operation fails
 */
public List<String> listDatabases() throws CatalogException;

/**
 * Get database metadata by name
 * @param databaseName - Name of the database
 * @return CatalogDatabase with metadata
 * @throws DatabaseNotExistException if database doesn't exist
 * @throws CatalogException if operation fails
 */
public CatalogDatabase getDatabase(String databaseName) throws DatabaseNotExistException, CatalogException;

/**
 * Create a new database
 * @param databaseName - Name for the new database
 * @param database - Database metadata
 * @param ignoreIfExists - Whether to ignore if database already exists
 * @throws DatabaseAlreadyExistException if database exists and ignoreIfExists is false
 * @throws CatalogException if operation fails
 */
public void createDatabase(String databaseName, CatalogDatabase database, boolean ignoreIfExists) 
    throws DatabaseAlreadyExistException, CatalogException;

/**
 * Drop an existing database
 * @param databaseName - Name of database to drop
 * @param ignoreIfNotExists - Whether to ignore if database doesn't exist  
 * @param cascade - Whether to drop all tables in the database
 * @throws DatabaseNotExistException if database doesn't exist and ignoreIfNotExists is false
 * @throws DatabaseNotEmptyException if database has tables and cascade is false
 * @throws CatalogException if operation fails
 */
public void dropDatabase(String databaseName, boolean ignoreIfNotExists, boolean cascade)
    throws DatabaseNotExistException, DatabaseNotEmptyException, CatalogException;

/**
 * List all tables in a database
 * @param databaseName - Name of the database
 * @return List of table names
 * @throws DatabaseNotExistException if database doesn't exist
 * @throws CatalogException if operation fails
 */
public List<String> listTables(String databaseName) throws DatabaseNotExistException, CatalogException;

/**
 * Get table metadata by path
 * @param tablePath - Object path containing database and table name
 * @return CatalogBaseTable with complete metadata
 * @throws TableNotExistException if table doesn't exist
 * @throws CatalogException if operation fails
 */
public CatalogBaseTable getTable(ObjectPath tablePath) throws TableNotExistException, CatalogException;

/**
 * Create a new table
 * @param tablePath - Object path for the new table
 * @param table - Table definition with schema and properties
 * @param ignoreIfExists - Whether to ignore if table already exists
 * @throws TableAlreadyExistException if table exists and ignoreIfExists is false
 * @throws DatabaseNotExistException if database doesn't exist
 * @throws CatalogException if operation fails
 */
public void createTable(ObjectPath tablePath, CatalogBaseTable table, boolean ignoreIfExists)
    throws TableAlreadyExistException, DatabaseNotExistException, CatalogException;

/**
 * Drop an existing table
 * @param tablePath - Object path of table to drop
 * @param ignoreIfNotExists - Whether to ignore if table doesn't exist
 * @throws TableNotExistException if table doesn't exist and ignoreIfNotExists is false
 * @throws CatalogException if operation fails
 */
public void dropTable(ObjectPath tablePath, boolean ignoreIfNotExists)
    throws TableNotExistException, CatalogException;

/**
 * Rename an existing table
 * @param tablePath - Current object path of the table
 * @param newTableName - New name for the table
 * @param ignoreIfNotExists - Whether to ignore if table doesn't exist
 * @throws TableNotExistException if table doesn't exist and ignoreIfNotExists is false
 * @throws TableAlreadyExistException if new name already exists
 * @throws CatalogException if operation fails
 */
public void renameTable(ObjectPath tablePath, String newTableName, boolean ignoreIfNotExists)
    throws TableNotExistException, TableAlreadyExistException, CatalogException;

/**
 * List all partitions for a table
 * @param tablePath - Object path of the table
 * @return List of partition specifications
 * @throws TableNotExistException if table doesn't exist
 * @throws CatalogException if operation fails
 */
public List<CatalogPartitionSpec> listPartitions(ObjectPath tablePath)
    throws TableNotExistException, CatalogException;

/**
 * List partitions matching a partial specification
 * @param tablePath - Object path of the table
 * @param partitionSpec - Partial partition specification to match
 * @return List of matching partition specifications
 * @throws TableNotExistException if table doesn't exist
 * @throws CatalogException if operation fails
 */
public List<CatalogPartitionSpec> listPartitionsByFilter(ObjectPath tablePath, List<Expression> filters)
    throws TableNotExistException, CatalogException;

/**
 * Get partition metadata
 * @param tablePath - Object path of the table
 * @param partitionSpec - Complete partition specification
 * @return CatalogPartition with metadata
 * @throws PartitionNotExistException if partition doesn't exist
 * @throws CatalogException if operation fails
 */
public CatalogPartition getPartition(ObjectPath tablePath, CatalogPartitionSpec partitionSpec)
    throws PartitionNotExistException, CatalogException;

/**
 * Create a new partition
 * @param tablePath - Object path of the table
 * @param partitionSpec - Partition specification
 * @param partition - Partition metadata
 * @param ignoreIfExists - Whether to ignore if partition already exists
 * @throws PartitionAlreadyExistException if partition exists and ignoreIfExists is false
 * @throws TableNotExistException if table doesn't exist
 * @throws CatalogException if operation fails
 */
public void createPartition(ObjectPath tablePath, CatalogPartitionSpec partitionSpec, CatalogPartition partition, boolean ignoreIfExists)
    throws PartitionAlreadyExistException, TableNotExistException, CatalogException;

/**
 * Drop an existing partition
 * @param tablePath - Object path of the table
 * @param partitionSpec - Partition specification to drop
 * @param ignoreIfNotExists - Whether to ignore if partition doesn't exist
 * @throws PartitionNotExistException if partition doesn't exist and ignoreIfNotExists is false
 * @throws CatalogException if operation fails
 */
public void dropPartition(ObjectPath tablePath, CatalogPartitionSpec partitionSpec, boolean ignoreIfNotExists)
    throws PartitionNotExistException, CatalogException;

/**
 * Alter an existing database
 * @param databaseName - Name of the database to alter
 * @param newDatabase - New database metadata
 * @param ignoreIfNotExists - Whether to ignore if database doesn't exist
 * @throws DatabaseNotExistException if database doesn't exist and ignoreIfNotExists is false
 * @throws CatalogException if operation fails
 */
public void alterDatabase(String databaseName, CatalogDatabase newDatabase, boolean ignoreIfNotExists)
    throws DatabaseNotExistException, CatalogException;

/**
 * Alter an existing table
 * @param tablePath - Object path of the table to alter
 * @param newCatalogTable - New table metadata
 * @param ignoreIfNotExists - Whether to ignore if table doesn't exist
 * @throws TableNotExistException if table doesn't exist and ignoreIfNotExists is false
 * @throws CatalogException if operation fails
 */
public void alterTable(ObjectPath tablePath, CatalogBaseTable newCatalogTable, boolean ignoreIfNotExists)
    throws TableNotExistException, CatalogException;

/**
 * Alter an existing partition
 * @param tablePath - Object path of the table
 * @param partitionSpec - Partition specification to alter
 * @param newPartition - New partition metadata
 * @param ignoreIfNotExists - Whether to ignore if partition doesn't exist
 * @throws PartitionNotExistException if partition doesn't exist and ignoreIfNotExists is false
 * @throws CatalogException if operation fails
 */
public void alterPartition(ObjectPath tablePath, CatalogPartitionSpec partitionSpec, CatalogPartition newPartition, boolean ignoreIfNotExists)
    throws PartitionNotExistException, CatalogException;

/**
 * Alter an existing function
 * @param functionPath - Object path of the function to alter
 * @param newFunction - New function metadata
 * @param ignoreIfNotExists - Whether to ignore if function doesn't exist
 * @throws FunctionNotExistException if function doesn't exist and ignoreIfNotExists is false
 * @throws CatalogException if operation fails
 */
public void alterFunction(ObjectPath functionPath, CatalogFunction newFunction, boolean ignoreIfNotExists)
    throws FunctionNotExistException, CatalogException;

/**
 * Check if a database exists
 * @param databaseName - Name of the database to check
 * @return true if database exists, false otherwise
 * @throws CatalogException if operation fails
 */
public boolean databaseExists(String databaseName) throws CatalogException;

/**
 * Check if a table exists
 * @param tablePath - Object path of the table to check
 * @return true if table exists, false otherwise
 * @throws CatalogException if operation fails
 */
public boolean tableExists(ObjectPath tablePath) throws CatalogException;

/**
 * Check if a partition exists
 * @param tablePath - Object path of the table
 * @param partitionSpec - Partition specification to check
 * @return true if partition exists, false otherwise
 * @throws CatalogException if operation fails
 */
public boolean partitionExists(ObjectPath tablePath, CatalogPartitionSpec partitionSpec) throws CatalogException;

/**
 * Get table statistics
 * @param tablePath - Object path of the table
 * @return CatalogTableStatistics with table statistics
 * @throws TableNotExistException if table doesn't exist
 * @throws CatalogException if operation fails
 */
public CatalogTableStatistics getTableStatistics(ObjectPath tablePath)
    throws TableNotExistException, CatalogException;

/**
 * Get table column statistics
 * @param tablePath - Object path of the table
 * @return CatalogColumnStatistics with column statistics
 * @throws TableNotExistException if table doesn't exist
 * @throws CatalogException if operation fails
 */
public CatalogColumnStatistics getTableColumnStatistics(ObjectPath tablePath)
    throws TableNotExistException, CatalogException;

/**
 * Get partition statistics
 * @param tablePath - Object path of the table
 * @param partitionSpec - Partition specification
 * @return CatalogTableStatistics with partition statistics
 * @throws PartitionNotExistException if partition doesn't exist
 * @throws CatalogException if operation fails
 */
public CatalogTableStatistics getPartitionStatistics(ObjectPath tablePath, CatalogPartitionSpec partitionSpec)
    throws PartitionNotExistException, CatalogException;

/**
 * Get partition column statistics
 * @param tablePath - Object path of the table
 * @param partitionSpec - Partition specification
 * @return CatalogColumnStatistics with partition column statistics
 * @throws PartitionNotExistException if partition doesn't exist
 * @throws CatalogException if operation fails
 */
public CatalogColumnStatistics getPartitionColumnStatistics(ObjectPath tablePath, CatalogPartitionSpec partitionSpec)
    throws PartitionNotExistException, CatalogException;

/**
 * Alter table statistics
 * @param tablePath - Object path of the table
 * @param tableStatistics - New table statistics
 * @param ignoreIfNotExists - Whether to ignore if table doesn't exist
 * @throws TableNotExistException if table doesn't exist and ignoreIfNotExists is false
 * @throws CatalogException if operation fails
 */
public void alterTableStatistics(ObjectPath tablePath, CatalogTableStatistics tableStatistics, boolean ignoreIfNotExists)
    throws TableNotExistException, CatalogException;

/**
 * Alter table column statistics
 * @param tablePath - Object path of the table
 * @param columnStatistics - New column statistics
 * @param ignoreIfNotExists - Whether to ignore if table doesn't exist
 * @throws TableNotExistException if table doesn't exist and ignoreIfNotExists is false
 * @throws TablePartitionedException if table is partitioned
 * @throws CatalogException if operation fails
 */
public void alterTableColumnStatistics(ObjectPath tablePath, CatalogColumnStatistics columnStatistics, boolean ignoreIfNotExists)
    throws TableNotExistException, TablePartitionedException, CatalogException;

/**
 * Alter partition statistics
 * @param tablePath - Object path of the table
 * @param partitionSpec - Partition specification
 * @param partitionStatistics - New partition statistics
 * @param ignoreIfNotExists - Whether to ignore if partition doesn't exist
 * @throws PartitionNotExistException if partition doesn't exist and ignoreIfNotExists is false
 * @throws CatalogException if operation fails
 */
public void alterPartitionStatistics(ObjectPath tablePath, CatalogPartitionSpec partitionSpec, CatalogTableStatistics partitionStatistics, boolean ignoreIfNotExists)
    throws PartitionNotExistException, CatalogException;

/**
 * Alter partition column statistics
 * @param tablePath - Object path of the table
 * @param partitionSpec - Partition specification
 * @param columnStatistics - New column statistics
 * @param ignoreIfNotExists - Whether to ignore if partition doesn't exist
 * @throws PartitionNotExistException if partition doesn't exist and ignoreIfNotExists is false
 * @throws CatalogException if operation fails
 */
public void alterPartitionColumnStatistics(ObjectPath tablePath, CatalogPartitionSpec partitionSpec, CatalogColumnStatistics columnStatistics, boolean ignoreIfNotExists)
    throws PartitionNotExistException, CatalogException;

/**
 * List all functions in a database
 * @param databaseName - Name of the database
 * @return List of function names
 * @throws DatabaseNotExistException if database doesn't exist
 * @throws CatalogException if operation fails
 */
public List<String> listFunctions(String databaseName) throws DatabaseNotExistException, CatalogException;

/**
 * Get function metadata
 * @param functionPath - Object path of the function
 * @return CatalogFunction with metadata
 * @throws FunctionNotExistException if function doesn't exist
 * @throws CatalogException if operation fails
 */
public CatalogFunction getFunction(ObjectPath functionPath) throws FunctionNotExistException, CatalogException;

/**
 * Create a new function
 * @param functionPath - Object path for the new function
 * @param function - Function definition
 * @param ignoreIfExists - Whether to ignore if function already exists
 * @throws FunctionAlreadyExistException if function exists and ignoreIfExists is false
 * @throws DatabaseNotExistException if database doesn't exist
 * @throws CatalogException if operation fails
 */
public void createFunction(ObjectPath functionPath, CatalogFunction function, boolean ignoreIfExists)
    throws FunctionAlreadyExistException, DatabaseNotExistException, CatalogException;

/**
 * Check if a table is a Hive table based on its properties
 * @param tableOptions - Map of table properties
 * @return true if this is a Hive table
 */
public static boolean isHiveTable(Map<String, String> tableOptions);

/**
 * Get the Hive configuration
 * @return HiveConf instance used by this catalog
 */
public HiveConf getHiveConf();

/**
 * Get the Hive version
 * @return Version string for this Hive installation
 */
public String getHiveVersion();

import org.apache.flink.table.api.TableEnvironment;
import org.apache.flink.table.catalog.hive.HiveCatalog;
import org.apache.flink.table.catalog.ObjectPath;

// Create and register Hive catalog
HiveCatalog hiveCatalog = new HiveCatalog(
    "hive_catalog", 
    "default",
    "/opt/hive/conf",
    "/opt/hadoop/etc/hadoop", 
    "2.3.6"
);

TableEnvironment tableEnv = TableEnvironment.create(EnvironmentSettings.inBatchMode());
tableEnv.registerCatalog("hive_catalog", hiveCatalog);
tableEnv.useCatalog("hive_catalog");

// List databases
List<String> databases = hiveCatalog.listDatabases();
System.out.println("Available databases: " + databases);

// List tables in default database  
List<String> tables = hiveCatalog.listTables("default");
System.out.println("Tables in default database: " + tables);

// Get table metadata
ObjectPath tablePath = new ObjectPath("default", "my_table");
CatalogBaseTable table = hiveCatalog.getTable(tablePath);
System.out.println("Table schema: " + table.getSchema());

// List partitions
List<CatalogPartitionSpec> partitions = hiveCatalog.listPartitions(tablePath);
System.out.println("Available partitions: " + partitions.size());

public class ObjectPath {
    public ObjectPath(String databaseName, String objectName);
    public String getDatabaseName();
    public String getObjectName();
}

public interface CatalogDatabase {
    Map<String, String> getProperties();
    String getComment();
}

public class CatalogDatabaseImpl implements CatalogDatabase {
    public CatalogDatabaseImpl(Map<String, String> properties, String comment);
}

public interface CatalogPartitionSpec {
    Map<String, String> getPartitionSpec(); 
}

public interface CatalogPartition {
    Map<String, String> getProperties();
    String getComment();
}