Package io.debezium.connector.oracle

Class OracleConnection

java.lang.Object

io.debezium.jdbc.JdbcConnection

io.debezium.connector.oracle.OracleConnection

All Implemented Interfaces:

AutoCloseable

public class OracleConnection
extends JdbcConnection

Nested Class Summary

Nested classes/interfaces inherited from class io.debezium.jdbc.JdbcConnection

JdbcConnection.BlockingMultiResultSetConsumer, JdbcConnection.BlockingResultSetConsumer, JdbcConnection.CallPreparer, JdbcConnection.ConnectionFactory, JdbcConnection.MultiResultSetConsumer, JdbcConnection.Operations, JdbcConnection.ParameterResultSetConsumer, JdbcConnection.ResultSetConsumer, JdbcConnection.ResultSetExtractor<T extends Object>, JdbcConnection.ResultSetMapper<T extends Object>, JdbcConnection.StatementFactory, JdbcConnection.StatementPreparer

Field Summary

Fields

Modifier and Type	Field	Description
private OracleDatabaseVersion	databaseVersion	The database version.
private static org.slf4j.Logger	LOGGER
private static int	ORACLE_UNSET_SCALE	Returned by column metadata in Oracle if no scale is set;
private static String	QUOTED_CHARACTER
private static Pattern	SYS_NC_PATTERN	Pattern to identify system generated indices and column names.
private static Field	URL	A field for the raw jdbc url.

Constructor Summary

Constructors

Constructor	Description
OracleConnection(Configuration config, Supplier<ClassLoader> classLoaderSupplier)

Method Summary

Modifier and Type	Method	Description
String	buildSelectWithRowLimits(TableId tableId, int limit, String projection, Optional<String> condition, String orderBy)
static String	connectionString(Configuration config)
protected Set<TableId>	getAllTableIds(String catalogName)	Retrieves all TableId in a given database catalog, filtering certain ids that should be omitted from the returned set such as special spatial tables and index-organized tables.
Scn	getCurrentScn()	Get the current, most recent system change number.
Scn	getMaxArchiveLogScn(String archiveLogDestinationName)	Get the maximum system change number in the archive logs.
OracleDatabaseVersion	getOracleVersion()
long	getRowCount(String tableName)	Returns the number of rows in a given table.
Optional<OffsetDateTime>	getScnToTimestamp(Scn scn)	Resolve a system change number to a timestamp, return value is in database timezone.
Long	getSessionStatisticByName(String name)	Get the current connection's session statistic by name.
private ResultSet	getTableColumnsInfo(String schemaNamePattern, String tableName)
String	getTableMetadataDdl(TableId tableId)	Generate a given table's DDL metadata.
protected boolean	isArchiveLogMode()	Determine whether the Oracle server has the archive log enabled.
boolean	isTableEmpty(String tableName)	Returns whether the given table is empty or not.
boolean	isTableExists(String tableName)	Returns whether the given table exists or not.
protected boolean	isTableUniqueIndexIncluded(String indexName, String columnName)
protected ColumnEditor	overrideColumn(ColumnEditor column)
void	readSchemaForCapturedTables(Tables tables, String databaseCatalog, String schemaNamePattern, Tables.ColumnNameFilter columnFilter, boolean removeTablesNotFoundInJdbc, Set<TableId> capturedTables)
Set<TableId>	readTableNames(String databaseCatalog, String schemaNamePattern, String tableNamePattern, String[] tableTypes)
List<String>	readTableUniqueIndices(DatabaseMetaData metadata, TableId id)
void	resetSessionToCdb()
protected String	resolveCatalogName(String catalogName)
private static JdbcConnection.ConnectionFactory	resolveConnectionFactory(Configuration config)
private OracleDatabaseVersion	resolveOracleDatabaseVersion()
void	setSessionToPdb(String pdbName)
<T> T	singleOptionalValue(String query, JdbcConnection.ResultSetExtractor<T> extractor)

Methods inherited from class io.debezium.jdbc.JdbcConnection

call, close, commit, config, connect, connection, connection, connectionString, database, execute, execute, executeWithoutCommitting, getColumnValue, isConnected, isNullable, isValid, parseSqlStatementString, patternBasedFactory, patternBasedFactory, prepareQuery, prepareQuery, prepareQuery, prepareQuery, prepareQuery, prepareQueryAndMap, prepareQueryWithBlockingConsumer, prepareUpdate, print, print, query, query, queryAndMap, queryAndMap, querySingleValue, queryWithBlockingConsumer, quotedColumnIdString, quotedTableIdString, readAllCatalogNames, readAllSchemaNames, readAllTableNames, readPrimaryKeyNames, readPrimaryKeyOrUniqueIndexNames, readSchema, readTableColumn, readTablePreparedStatement, readTableStatement, resolveJdbcType, resolveNativeType, rollback, rowToArray, setAutoCommit, singleResultMapper, tableTypes, username

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

LOGGER

private static final org.slf4j.Logger LOGGER

ORACLE_UNSET_SCALE

private static final int ORACLE_UNSET_SCALE

Returned by column metadata in Oracle if no scale is set;

See Also:

Constant Field Values

SYS_NC_PATTERN

private static final Pattern SYS_NC_PATTERN

Pattern to identify system generated indices and column names.

URL

private static final Field URL

A field for the raw jdbc url. This field has no default value.

databaseVersion

private final OracleDatabaseVersion databaseVersion

The database version.

QUOTED_CHARACTER

private static final String QUOTED_CHARACTER

See Also:

Constant Field Values

Constructor Detail

OracleConnection

public OracleConnection(Configuration config,
                        Supplier<ClassLoader> classLoaderSupplier)

Method Detail

setSessionToPdb

public void setSessionToPdb(String pdbName)

resetSessionToCdb

public void resetSessionToCdb()

getOracleVersion

public OracleDatabaseVersion getOracleVersion()

resolveOracleDatabaseVersion

private OracleDatabaseVersion resolveOracleDatabaseVersion()

readTableNames

public Set<TableId> readTableNames(String databaseCatalog,
                                   String schemaNamePattern,
                                   String tableNamePattern,
                                   String[] tableTypes)
                            throws SQLException

Overrides:

readTableNames in class JdbcConnection

Throws:

SQLException

getAllTableIds

protected Set<TableId> getAllTableIds(String catalogName)
                               throws SQLException

Retrieves all TableId in a given database catalog, filtering certain ids that should be omitted from the returned set such as special spatial tables and index-organized tables.

Parameters:

catalogName - the catalog/database name

Returns:

set of all table ids for existing table objects

Throws:

SQLException - if a database exception occurred

getTableColumnsInfo

private ResultSet getTableColumnsInfo(String schemaNamePattern,
                                      String tableName)
                               throws SQLException

Throws:

SQLException

readSchemaForCapturedTables

public void readSchemaForCapturedTables(Tables tables,
                                        String databaseCatalog,
                                        String schemaNamePattern,
                                        Tables.ColumnNameFilter columnFilter,
                                        boolean removeTablesNotFoundInJdbc,
                                        Set<TableId> capturedTables)
                                 throws SQLException

Throws:

SQLException

resolveCatalogName

protected String resolveCatalogName(String catalogName)

Overrides:

resolveCatalogName in class JdbcConnection

readTableUniqueIndices

public List<String> readTableUniqueIndices(DatabaseMetaData metadata,
                                           TableId id)
                                    throws SQLException

Overrides:

readTableUniqueIndices in class JdbcConnection

Throws:

SQLException

isTableUniqueIndexIncluded

protected boolean isTableUniqueIndexIncluded(String indexName,
                                             String columnName)

Overrides:

isTableUniqueIndexIncluded in class JdbcConnection

getCurrentScn

public Scn getCurrentScn()
                  throws SQLException

Get the current, most recent system change number.

Returns:

the current system change number

Throws:

SQLException - if an exception occurred

IllegalStateException - if the query does not return at least one row

getMaxArchiveLogScn

public Scn getMaxArchiveLogScn(String archiveLogDestinationName)
                        throws SQLException

Get the maximum system change number in the archive logs.

Parameters:

archiveLogDestinationName - the archive log destination name to be queried, can be null.

Returns:

the maximum system change number in the archive logs

Throws:

SQLException - if a database exception occurred

io.debezium.DebeziumException - if the maximum archive log system change number could not be found

getTableMetadataDdl

public String getTableMetadataDdl(TableId tableId)
                           throws SQLException

Generate a given table's DDL metadata.

Parameters:

tableId - table identifier, should never be null

Returns:

generated DDL

Throws:

SQLException - if an exception occurred obtaining the DDL metadata

getSessionStatisticByName

public Long getSessionStatisticByName(String name)
                               throws SQLException

Get the current connection's session statistic by name.

Parameters:

name - the name of the statistic to be fetched, must not be null

Returns:

the session statistic value, never null

Throws:

SQLException - if an exception occurred obtaining the session statistic value

isTableExists

public boolean isTableExists(String tableName)
                      throws SQLException

Returns whether the given table exists or not.

Parameters:

tableName - table name, should not be null

Returns:

true if the table exists, false if it does not

Throws:

SQLException - if a database exception occurred

isTableEmpty

public boolean isTableEmpty(String tableName)
                     throws SQLException

Returns whether the given table is empty or not.

Parameters:

tableName - table name, should not be null

Returns:

true if the table has no records, false otherwise

Throws:

SQLException - if a database exception occurred

getRowCount

public long getRowCount(String tableName)
                 throws SQLException

Returns the number of rows in a given table.

Parameters:

tableName - table name, should not be null

Returns:

the number of rows

Throws:

SQLException - if a database exception occurred

singleOptionalValue

public <T> T singleOptionalValue(String query,
                                 JdbcConnection.ResultSetExtractor<T> extractor)
                          throws SQLException

Throws:

SQLException

buildSelectWithRowLimits

public String buildSelectWithRowLimits(TableId tableId,
                                       int limit,
                                       String projection,
                                       Optional<String> condition,
                                       String orderBy)

Overrides:

buildSelectWithRowLimits in class JdbcConnection

connectionString

public static String connectionString(Configuration config)

resolveConnectionFactory

private static JdbcConnection.ConnectionFactory resolveConnectionFactory(Configuration config)

isArchiveLogMode

protected boolean isArchiveLogMode()

Determine whether the Oracle server has the archive log enabled.

Returns:

true if the server's LOG_MODE is set to ARCHIVELOG, or false otherwise

getScnToTimestamp

public Optional<OffsetDateTime> getScnToTimestamp(Scn scn)
                                           throws SQLException

Resolve a system change number to a timestamp, return value is in database timezone. The SCN to TIMESTAMP mapping is only retained for the duration of the flashback query area. This means that eventually the mapping between these values are no longer kept by Oracle and making a call with a SCN value that has aged out will result in an ORA-08181 error. This function explicitly checks for this use case and if a ORA-08181 error is thrown, it is therefore treated as if a value does not exist returning an empty optional value.

Parameters:

scn - the system change number, must not be null

Returns:

an optional timestamp when the system change number occurred

Throws:

SQLException - if a database exception occurred

overrideColumn

protected ColumnEditor overrideColumn(ColumnEditor column)

Overrides:

overrideColumn in class JdbcConnection