TeradataDialect (Geotools modules 21.0 API)

Object
- SQLDialect
- - PreparedStatementSQLDialect
  - - TeradataDialect

public class TeradataDialect
extends PreparedStatementSQLDialect

Field Summary
- Fields inherited from class SQLDialect
  BASE_DBMS_CAPABILITIES, dataStore, LOGGER

Constructor Summary

Constructors
Constructor and Description

TeradataDialect(JDBCDataStore store)

Constructors
Constructor and Description
`TeradataDialect(JDBCDataStore store)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`applyLimitOffset(StringBuffer sql, int limit, int offset)` Alters the query provided so that limit and offset are natively dealt with.
`PreparedFilterToSQL`	`createPreparedFilterToSQL()`
`Envelope`	`decodeGeometryEnvelope(ResultSet rs, int column, Connection cx)` Decodes the result of a spatial extent function in a SELECT statement.
`Geometry`	`decodeGeometryValue(GeometryDescriptor descriptor, ResultSet rs, String column, GeometryFactory factory, Connection cx, Hints hints)` Decodes a geometry value from the result of a query.
`void`	`encodeColumnType(String sqlTypeName, StringBuffer sql)` Encodes the type of a column in an SQL CREATE TABLE statement.
`void`	`encodeGeometryEnvelope(String tableName, String geometryColumn, StringBuffer sql)` Encodes the spatial extent function of a geometry column in a SELECT statement.
`void`	`encodePostSelect(SimpleFeatureType featureType, StringBuffer sql)` Encodes anything after the SELECT clause and before the FROM clause.
`void`	`encodePrimaryKey(String column, StringBuffer sql)` Encodes the primary key definition in a CREATE TABLE statement.
`Integer`	`getGeometrySRID(String schemaName, String tableName, String columnName, Connection cx)` Returns the spatial reference system identifier (srid) for a particular geometry column.
`String`	`getGeometryTypeName(Integer type)` Returns the name of a geometric type based on its integer constant.
`Object`	`getLastAutoGeneratedValue(String schemaName, String tableName, String columnName, Connection cx)` Obtains the last value of an auto generated column.
`Class<?>`	`getMapping(ResultSet columnMetaData, Connection cx)` Determines the class mapping for a particular column of a table.
`List<ReferencedEnvelope>`	`getOptimizedBounds(String schema, SimpleFeatureType featureType, Connection cx)` 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)
`int`	`getTdVersion()`
`boolean`	`includeTable(String schemaName, String tableName, Connection cx)` Determines if the specified table should be included in those published by the datastore.
`void`	`initializeConnection(Connection cx)` Initializes a newly created database connection.
`boolean`	`isAutoCommitQuery()` Prevent deadlock - old behavior in JDBCFeatureSource was to disable autocommit in getReaderInternal to work around a postgres bug.
`boolean`	`isEstimatedBounds()`
`boolean`	`isLimitOffsetSupported()` Returns true if this dialect can encode both Query.getStartIndex() and Query.getMaxFeatures() into native SQL.
`boolean`	`isLobWorkaroundEnabled()`
`boolean`	`isLooseBBOXEnabled()`
`boolean`	`lookupGeneratedValuesPostInsert()` Controls whether keys are looked up post or pre insert.
`String`	`lookupSqlTypeName(Connection cx, String schemaName, String tableName, String columnName)` Returns the database typename of the column by inspecting the metadata.
`void`	`onDelete(PreparedStatement delete, Connection cx, SimpleFeatureType featureType)` Callback invoked before a DELETE statement is executed against the database.
`void`	`onInsert(PreparedStatement insert, Connection cx, SimpleFeatureType featureType)` Callback invoked before an INSERT statement is executed against the database.
`void`	`onSelect(PreparedStatement select, Connection cx, SimpleFeatureType featureType)` Callback invoked before a SELECT statement is executed against the database.
`void`	`onUpdate(PreparedStatement update, Connection cx, SimpleFeatureType featureType)` Callback invoked before an UPDATE statement is executed against the database.
`void`	`postCreateAttribute(AttributeDescriptor att, String tableName, String schemaName, Connection cx)` Callback which executes after an attribute descriptor has been built from a table column.
`void`	`postCreateTable(String schemaName, SimpleFeatureType featureType, Connection cx)` Callback to execute any additional sql statements post a create table statement.
`void`	`registerClassToSqlMappings(Map<Class<?>,Integer> mappings)` 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.
`void`	`registerSqlTypeNameToClassMappings(Map<String,Class<?>> mappings)` Registers the sql type name to java type mappings that the dialect uses when reading and writing objects to and from the database.
`void`	`registerSqlTypeToSqlTypeNameOverrides(Map<Integer,String> overrides)` Registers any overrides that should occur when mapping an integer sql type value to an underlying sql type name.
`void`	`setApplication(String application)`
`void`	`setEstimatedBounds(boolean estimatedBounds)`
`void`	`setGeometryValue(Geometry g, int dimension, int srid, Class binding, PreparedStatement ps, int column)` Sets the geometry value into the prepared statement.
`void`	`setLobWorkaroundEnabled(boolean lobWorkaroundEnabled)`
`void`	`setLooseBBOXEnabled(boolean looseBBOXEnabled)`

Methods inherited from class PreparedStatementSQLDialect
convert, convertArrayElement, convertToArray, getArrayComponentTypeName, prepareFunctionArgument, prepareGeometryValue, prepareGeometryValue, setArrayValue, setValue

Methods inherited from class SQLDialect
addSupportedHints, createCRS, createIndex, decodeGeometryValue, dropIndex, encodeAggregateFunction, encodeAggregateFunctionPostfix, encodeAggregateFunctionPrefix, encodeColumnAlias, encodeColumnName, encodeColumnName, encodeCreateTable, encodeGeometryColumn, encodeGeometryColumn, encodeGeometryColumn, encodeGeometryColumnGeneralized, encodeGeometryColumnGeneralized, encodeGeometryColumnSimplified, encodeGeometryColumnSimplified, encodeJoin, encodeNextSequenceValue, encodePostColumnCreateTable, encodePostCreateTable, encodeSchemaName, encodeTableAlias, encodeTableName, getDefaultVarcharSize, getDesiredTablesType, getGeometryDimension, getIndexes, getLastAutoGeneratedValue, getNameEscape, getNextAutoGeneratedValue, getNextSequenceValue, getPkColumnValue, getPrimaryKey, getSequenceForColumn, handleSelectHints, handleUserDefinedType, isAggregatedSortSupported, isGroupBySupported, ne, postCreateFeatureType, postDropTable, preDropTable, registerAggregateFunctions, registerFunctions, registerSqlTypeToClassMappings, splitFilter, supportsSchemaForIndex

Methods inherited from class Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 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
  setGeometryValue public void setGeometryValue(Geometry g, int dimension, int srid, Class binding, PreparedStatement ps, int column) throws SQLException Description copied from class: PreparedStatementSQLDialect Sets the geometry value into the prepared statement. Specified by: setGeometryValue in class PreparedStatementSQLDialect Parameters: g - The geometry srid - the geometry native srid (should be forced into the encoded geometry) binding - the geometry type ps - the prepared statement column - the column index where the geometry is to be set 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 decodeGeometryEnvelope public Envelope decodeGeometryEnvelope(ResultSet rs, int column, Connection cx) throws SQLException, IOException Description copied from class: SQLDialect Decodes the result of a spatial extent function in a SELECT statement. This method is given direct access to a result set. The column parameter is the index into the result set which contains the spatial extent value. The query for this value is build with the SQLDialect.encodeGeometryEnvelope(String, String, StringBuffer) method. This method must not read any other objects from the result set other then the one referenced by column. Specified by: decodeGeometryEnvelope in class SQLDialect Parameters: rs - A result set column - Index into the result set which points at the spatial extent value. Throws: SQLException IOException 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 SQLDialect.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 getGeometryTypeName public String getGeometryTypeName(Integer type) Description copied from class: SQLDialect Returns the name of a geometric type based on its integer constant. The constant, type, is registered in SQLDialect.registerSqlTypeNameToClassMappings(Map). This default implementation returns null, subclasses should override. Overrides: getGeometryTypeName in class SQLDialect getMapping public Class<?> getMapping(ResultSet columnMetaData, Connection cx) throws SQLException Description copied from class: SQLDialect Determines the class mapping for a particular column of a table. Implementing this method is optional. It is used to allow database to perform custom type mappings based on various column metadata. It is called before the mappings registered in SQLDialect.registerSqlTypeToClassMappings(Map) and #registerSqlTypeNameToClassMappings(Map) are used to determine the mapping. Subclasses should implement as needed, this default implementation returns null. The columnMetaData argument is provided from {@link DatabaseMetaData#getColumns(String, String, String, String)}. Overrides: getMapping in class SQLDialect Parameters: columnMetaData - The column metadata Returns: The class mapped to the to column, or null. Throws: SQLException lookupGeneratedValuesPostInsert public boolean lookupGeneratedValuesPostInsert() Description copied from class: SQLDialect Controls whether keys are looked up post or pre insert. When a row is inserted into a table, and a key is automatically generated it can be looked up before the insert occurs, or after the insert has been made. Returning false will cause the lookup to occur before the insert via SQLDialect.getNextAutoGeneratedValue(String, String, String, Connection). Returning true will cause the lookup to occur after the insert via SQLDialect.getLastAutoGeneratedValue(String, String, String, Connection). Subclasses returning false should implement: SQLDialect.getNextAutoGeneratedValue(String, String, String, Connection) Subclasses returning true should implement: SQLDialect.getLastAutoGeneratedValue(String, String, String, Connection) Overrides: lookupGeneratedValuesPostInsert in class SQLDialect 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 lookupSqlTypeName public String lookupSqlTypeName(Connection cx, String schemaName, String tableName, String columnName) throws SQLException Returns the database typename of the column by inspecting the metadata. 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 isLimitOffsetSupported public boolean isLimitOffsetSupported() Description copied from class: SQLDialect Returns true if this dialect can encode both Query.getStartIndex() and Query.getMaxFeatures() into native SQL. Overrides: isLimitOffsetSupported in class SQLDialect Returns: 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 createPreparedFilterToSQL public PreparedFilterToSQL createPreparedFilterToSQL() Overrides: createPreparedFilterToSQL in class PreparedStatementSQLDialect 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

Class TeradataDialect

Field Summary

Fields inherited from class SQLDialect

Constructor Summary

Method Summary

Methods inherited from class PreparedStatementSQLDialect

Methods inherited from class SQLDialect

Methods inherited from class Object

Constructor Detail

TeradataDialect

Method Detail

isLobWorkaroundEnabled

setLobWorkaroundEnabled

setLooseBBOXEnabled

isLooseBBOXEnabled

setEstimatedBounds

isEstimatedBounds

getTdVersion

setApplication

initializeConnection

includeTable

setGeometryValue

decodeGeometryValue

decodeGeometryEnvelope

encodeColumnType

encodeGeometryEnvelope

encodePostSelect

getOptimizedBounds

isAutoCommitQuery

encodePrimaryKey

getGeometrySRID

getGeometryTypeName

getMapping

lookupGeneratedValuesPostInsert

getLastAutoGeneratedValue

lookupSqlTypeName

postCreateAttribute

postCreateTable

registerClassToSqlMappings

registerSqlTypeNameToClassMappings

registerSqlTypeToSqlTypeNameOverrides

isLimitOffsetSupported

applyLimitOffset

createPreparedFilterToSQL

onSelect

onDelete

onInsert

onUpdate