Class TeradataDialect

    • Constructor Detail

      • TeradataDialect

        public TeradataDialect​(JDBCDataStore store)
    • Method Detail

      • isLobWorkaroundEnabled

        public boolean isLobWorkaroundEnabled()
      • setLobWorkaroundEnabled

        public void setLobWorkaroundEnabled​(boolean lobWorkaroundEnabled)
      • setLooseBBOXEnabled

        public void setLooseBBOXEnabled​(boolean looseBBOXEnabled)
      • isLooseBBOXEnabled

        public boolean isLooseBBOXEnabled()
      • setEstimatedBounds

        public void setEstimatedBounds​(boolean estimatedBounds)
      • isEstimatedBounds

        public boolean isEstimatedBounds()
      • getTdVersion

        public int getTdVersion()
      • setApplication

        public void setApplication​(String application)
      • initializeConnection

        public void initializeConnection​(Connection cx)
                                  throws SQLException
        Description copied from class: SQLDialect
        Initializes a newly created database connection.

        Subclasses should override this method if there is some additional action that needs to be taken when a new connection to the database is created. The default implementation does nothing.

        Overrides:
        initializeConnection in class SQLDialect
        Parameters:
        cx - The new database connection.
        Throws:
        SQLException
      • includeTable

        public boolean includeTable​(String schemaName,
                                    String tableName,
                                    Connection cx)
                             throws SQLException
        Description copied from class: SQLDialect
        Determines if the specified table should be included in those published by the datastore.

        This method returns true if the table should be published as a feature type, otherwise it returns false. Subclasses should override this method, this default implementation returns true.

        A database connection is provided to the dialect but it should not be closed. However any statements objects or result sets that are instantiated from it must be closed.

        Overrides:
        includeTable in class SQLDialect
        Parameters:
        schemaName - The schema of the table, might be null..
        tableName - The name of the table.
        cx - Database connection.
        Throws:
        SQLException
      • decodeGeometryValue

        public Geometry decodeGeometryValue​(GeometryDescriptor descriptor,
                                            ResultSet rs,
                                            String column,
                                            GeometryFactory factory,
                                            Connection cx,
                                            Hints hints)
                                     throws IOException,
                                            SQLException
        Description copied from class: SQLDialect
        Decodes a geometry value from the result of a query.

        This method is given direct access to a result set. The column parameter is the index into the result set which contains the geometric value.

        An implementation should deserialize the value provided by the result set into Geometry object. For example, consider an implementation which deserializes from well known text:

           String wkt = rs.getString( column );
           if ( wkt == null ) {
             return null;
           }
           return new WKTReader(factory).read( wkt );
           
        Note that implementations must handle null values.

        The factory parameter should be used to instantiate any geometry objects.

        Specified by:
        decodeGeometryValue in class SQLDialect
        Throws:
        IOException
        SQLException
      • encodeColumnType

        public void encodeColumnType​(String sqlTypeName,
                                     StringBuffer sql)
        Description copied from class: SQLDialect
        Encodes the type of a column in an SQL CREATE TABLE statement.

        The default implementation simply outputs the sqlTypeName argument as is. Subclasses may override this method. Such cases might include:

        • A type definition requires some parameter, ex: size of a varchar
        • The provided attribute (att) contains some additional restrictions that can be encoded in the type, ex: field length
        Overrides:
        encodeColumnType in class SQLDialect
      • encodeGeometryEnvelope

        public void encodeGeometryEnvelope​(String tableName,
                                           String geometryColumn,
                                           StringBuffer sql)
        Description copied from class: SQLDialect
        Encodes the spatial extent function of a geometry column in a SELECT statement.

        This method must also be sure to properly encode the name of the column with the #encodeColumnName(String, StringBuffer) function.

        Specified by:
        encodeGeometryEnvelope in class SQLDialect
      • encodePostSelect

        public void encodePostSelect​(SimpleFeatureType featureType,
                                     StringBuffer sql)
        Description copied from class: SQLDialect
        Encodes anything after the SELECT clause and before the FROM clause.

        This method does not nothing, subclass may override to add additional columns.

        Overrides:
        encodePostSelect in class SQLDialect
        Parameters:
        featureType - The feature type being queried.
      • getOptimizedBounds

        public List<ReferencedEnvelope> getOptimizedBounds​(String schema,
                                                           SimpleFeatureType featureType,
                                                           Connection cx)
                                                    throws SQLException,
                                                           IOException
        Description copied from class: SQLDialect
        Returns the bounds of all geometry columns in the layer using any approach that proves to be faster than the plain bounds aggregation (e.g., better than the "plain select extent(geom) from table" on PostGIS), or null if none exists or the fast method has not been enabled (e.g., if the fast method is just an estimate of the bounds you probably want the user to enable it manually)
        Overrides:
        getOptimizedBounds in class SQLDialect
        Parameters:
        schema - The database schema, if any, or null
        featureType - The feature type containing the geometry columns whose bounds need to computed. Mind, it may be retyped and thus contain less geometry columns than the table
        Returns:
        a list of referenced envelopes (some of which may be null or empty)
        Throws:
        SQLException
        IOException
      • isAutoCommitQuery

        public boolean isAutoCommitQuery()
        Prevent deadlock - old behavior in JDBCFeatureSource was to disable autocommit in getReaderInternal to work around a postgres bug. This caused database deadlock many times as the 'read' transaction would never complete and subsequent writes would lock.
        Overrides:
        isAutoCommitQuery in class SQLDialect
        Returns:
        true
      • encodePrimaryKey

        public void encodePrimaryKey​(String column,
                                     StringBuffer sql)
        Description copied from class: SQLDialect
        Encodes the primary key definition in a CREATE TABLE statement.

        Subclasses should override this method if need be, the default implementation does the following:

           
           encodeColumnName( column, sql );
           sql.append( " int PRIMARY KEY" );
           
         
        Overrides:
        encodePrimaryKey in class SQLDialect
      • getGeometrySRID

        public Integer getGeometrySRID​(String schemaName,
                                       String tableName,
                                       String columnName,
                                       Connection cx)
                                throws SQLException
        Description copied from class: SQLDialect
        Returns the spatial reference system identifier (srid) for a particular geometry column.

        This method is given a direct connection to the database. The connection must not be closed. However any statements or result sets instantiated from the connection must be closed.

        In the event that the srid cannot be determined, this method should return null .

        Overrides:
        getGeometrySRID in class SQLDialect
        Parameters:
        schemaName - The database schema, could be null.
        tableName - The table, never null.
        columnName - The column name, never null
        cx - The database connection.
        Throws:
        SQLException
      • getLastAutoGeneratedValue

        public Object getLastAutoGeneratedValue​(String schemaName,
                                                String tableName,
                                                String columnName,
                                                Connection cx)
                                         throws SQLException
        Description copied from class: SQLDialect
        Obtains the last value of an auto generated column.

        This method is only called when SQLDialect.lookupGeneratedValuesPostInsert() returns true. Implementations should determine the previous value of a column for which was automatically generated by the database.

        This method is given a direct connection to the database, but this connection should never be closed. However any statements or result sets instantiated from the connection must be closed.

        Implementations should handle the case where schemaName is null.

        Overrides:
        getLastAutoGeneratedValue in class SQLDialect
        Parameters:
        schemaName - The schema name, this might be null.
        tableName - The name of the table.
        columnName - The column.
        cx - The database connection.
        Returns:
        The previous value of the column, or null.
        Throws:
        SQLException
      • postCreateAttribute

        public void postCreateAttribute​(AttributeDescriptor att,
                                        String tableName,
                                        String schemaName,
                                        Connection cx)
                                 throws SQLException
        Description copied from class: SQLDialect
        Callback which executes after an attribute descriptor has been built from a table column.

        The result set columnMetadata should not be modified in any way (including scrolling) , it should only be read from.

        This base implementation does nothing, subclasses should override as need be.

        Overrides:
        postCreateAttribute in class SQLDialect
        Parameters:
        att - The built attribute descriptor.
        tableName - The name of the table containing the column
        schemaName - The name of the database scheam containing the table containing the column
        cx - The database connection.
        Throws:
        SQLException
      • postCreateTable

        public void postCreateTable​(String schemaName,
                                    SimpleFeatureType featureType,
                                    Connection cx)
                             throws SQLException
        Description copied from class: SQLDialect
        Callback to execute any additional sql statements post a create table statement.

        This method should be implemented by subclasses that need to do some post processing on the database after a table has been created. Examples might include:

        • Creating a sequence for a primary key
        • Registering geometry column metadata
        • Creating a spatial index

        A common case is creating an auto incrementing sequence for the primary key of a table. It should be noted that all tables created through the datastore use the column "fid" as the primary key.

        A direct connection to the database is provided (cx). This connection must not be closed, however any statements or result sets instantiated from the connection must be closed.

        Overrides:
        postCreateTable in class SQLDialect
        Parameters:
        schemaName - The name of the schema, may be null.
        featureType - The feature type that has just been created on the database.
        cx - Database connection.
        Throws:
        SQLException
      • registerClassToSqlMappings

        public void registerClassToSqlMappings​(Map<Class<?>,​Integer> mappings)
        Description copied from class: SQLDialect
        Registers the java type to sql type mappings that the datastore uses when reading and writing objects to and from the database. *

        Subclasses should extend (not override) this method to provide additional mappings, or to override mappings provided by this implementation. This implementation provides the following mappings:

        Overrides:
        registerClassToSqlMappings in class SQLDialect
      • registerSqlTypeNameToClassMappings

        public void registerSqlTypeNameToClassMappings​(Map<String,​Class<?>> mappings)
        Description copied from class: SQLDialect
        Registers the sql type name to java type mappings that the dialect uses when reading and writing objects to and from the database.

        Subclasses should extend (not override) this method to provide additional mappings, or to override mappings provided by this implementation. This implementation provides the following mappings:

        Overrides:
        registerSqlTypeNameToClassMappings in class SQLDialect
      • registerSqlTypeToSqlTypeNameOverrides

        public void registerSqlTypeToSqlTypeNameOverrides​(Map<Integer,​String> overrides)
        Description copied from class: SQLDialect
        Registers any overrides that should occur when mapping an integer sql type value to an underlying sql type name.

        The default implementation of this method does nothing. Subclasses should override in cases where:

        • database type metadata does not provide enough information to properly map
        • to support custom types (those not in Types)
        Overrides:
        registerSqlTypeToSqlTypeNameOverrides in class SQLDialect
      • applyLimitOffset

        public void applyLimitOffset​(StringBuffer sql,
                                     int limit,
                                     int offset)
        Description copied from class: SQLDialect
        Alters the query provided so that limit and offset are natively dealt with. This might mean simply appending some extra directive to the query, or wrapping it into a bigger one.
        Overrides:
        applyLimitOffset in class SQLDialect
      • onSelect

        public void onSelect​(PreparedStatement select,
                             Connection cx,
                             SimpleFeatureType featureType)
                      throws SQLException
        Description copied from class: PreparedStatementSQLDialect
        Callback invoked before a SELECT statement is executed against the database.

        The callback is provided with both the statement being executed and the database connection. Neither should be closed. Any statements created from the connection however in this method should be closed.

        Overrides:
        onSelect in class PreparedStatementSQLDialect
        Parameters:
        select - The select statement being executed
        cx - The database connection
        featureType - The feature type the select is executing against.
        Throws:
        SQLException
      • onDelete

        public void onDelete​(PreparedStatement delete,
                             Connection cx,
                             SimpleFeatureType featureType)
                      throws SQLException
        Description copied from class: PreparedStatementSQLDialect
        Callback invoked before a DELETE statement is executed against the database.

        The callback is provided with both the statement being executed and the database connection. Neither should be closed. Any statements created from the connection however in this method should be closed.

        Overrides:
        onDelete in class PreparedStatementSQLDialect
        Parameters:
        delete - The delete statement being executed
        cx - The database connection
        featureType - The feature type the delete is executing against.
        Throws:
        SQLException
      • onInsert

        public void onInsert​(PreparedStatement insert,
                             Connection cx,
                             SimpleFeatureType featureType)
                      throws SQLException
        Description copied from class: PreparedStatementSQLDialect
        Callback invoked before an INSERT statement is executed against the database.

        The callback is provided with both the statement being executed and the database connection. Neither should be closed. Any statements created from the connection however in this method should be closed.

        Overrides:
        onInsert in class PreparedStatementSQLDialect
        Parameters:
        insert - The delete statement being executed
        cx - The database connection
        featureType - The feature type the insert is executing against.
        Throws:
        SQLException
      • onUpdate

        public void onUpdate​(PreparedStatement update,
                             Connection cx,
                             SimpleFeatureType featureType)
                      throws SQLException
        Description copied from class: PreparedStatementSQLDialect
        Callback invoked before an UPDATE statement is executed against the database.

        The callback is provided with both the statement being executed and the database connection. Neither should be closed. Any statements created from the connection however in this method should be closed.

        Overrides:
        onUpdate in class PreparedStatementSQLDialect
        Parameters:
        update - The delete statement being executed
        cx - The database connection
        featureType - The feature type the update is executing against.
        Throws:
        SQLException