/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.dialect;
import java.sql.CallableStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import java.util.List;
import java.util.Locale;
import java.util.regex.Pattern;
import org.hibernate.JDBCException;
import org.hibernate.QueryTimeoutException;
import org.hibernate.annotations.common.util.StringHelper;
import org.hibernate.cfg.Environment;
import org.hibernate.dialect.function.NoArgSQLFunction;
import org.hibernate.dialect.function.NvlFunction;
import org.hibernate.dialect.function.SQLFunctionTemplate;
import org.hibernate.dialect.function.StandardSQLFunction;
import org.hibernate.dialect.function.VarArgsSQLFunction;
import org.hibernate.dialect.pagination.AbstractLimitHandler;
import org.hibernate.dialect.pagination.LimitHandler;
import org.hibernate.dialect.pagination.LimitHelper;
import org.hibernate.engine.spi.QueryParameters;
import org.hibernate.engine.spi.RowSelection;
import org.hibernate.exception.ConstraintViolationException;
import org.hibernate.exception.LockAcquisitionException;
import org.hibernate.exception.LockTimeoutException;
import org.hibernate.exception.spi.SQLExceptionConversionDelegate;
import org.hibernate.exception.spi.TemplatedViolatedConstraintNameExtracter;
import org.hibernate.exception.spi.ViolatedConstraintNameExtracter;
import org.hibernate.hql.spi.id.IdTableSupportStandardImpl;
import org.hibernate.hql.spi.id.MultiTableBulkIdStrategy;
import org.hibernate.hql.spi.id.global.GlobalTemporaryTableBulkIdStrategy;
import org.hibernate.hql.spi.id.local.AfterUseAction;
import org.hibernate.internal.util.JdbcExceptionHelper;
import org.hibernate.procedure.internal.StandardCallableStatementSupport;
import org.hibernate.procedure.spi.CallableStatementSupport;
import org.hibernate.sql.CaseFragment;
import org.hibernate.sql.DecodeCaseFragment;
import org.hibernate.sql.JoinFragment;
import org.hibernate.sql.OracleJoinFragment;
import org.hibernate.type.StandardBasicTypes;
import org.hibernate.type.descriptor.sql.BitTypeDescriptor;
import org.hibernate.type.descriptor.sql.SqlTypeDescriptor;
/**
* A dialect for Oracle 8i.
*
* @author Steve Ebersole
*/
@SuppressWarnings("deprecation")
public class Oracle8iDialect extends Dialect {
private static final Pattern DISTINCT_KEYWORD_PATTERN = Pattern.compile( "\\bdistinct\\b" );
private static final Pattern GROUP_BY_KEYWORD_PATTERN = Pattern.compile( "\\bgroup\\sby\\b" );
private static final Pattern ORDER_BY_KEYWORD_PATTERN = Pattern.compile( "\\border\\sby\\b" );
private static final Pattern UNION_KEYWORD_PATTERN = Pattern.compile( "\\bunion\\b" );
private static final AbstractLimitHandler LIMIT_HANDLER = new AbstractLimitHandler() {
@Override
public String processSql(String sql, RowSelection selection) {
final boolean hasOffset = LimitHelper.hasFirstRow( selection );
sql = sql.trim();
boolean isForUpdate = false;
if (sql.toLowerCase(Locale.ROOT).endsWith( " for update" )) {
sql = sql.substring( 0, sql.length() - 11 );
isForUpdate = true;
}
final StringBuilder pagingSelect = new StringBuilder( sql.length() + 100 );
if (hasOffset) {
pagingSelect.append( "select * from ( select row_.*, rownum rownum_ from ( " );
}
else {
pagingSelect.append( "select * from ( " );
}
pagingSelect.append( sql );
if (hasOffset) {
pagingSelect.append( " ) row_ ) where rownum_ <= ? and rownum_ > ?" );
}
else {
pagingSelect.append( " ) where rownum <= ?" );
}
if (isForUpdate) {
pagingSelect.append( " for update" );
}
return pagingSelect.toString();
}
@Override
public boolean supportsLimit() {
return true;
}
@Override
public boolean bindLimitParametersInReverseOrder() {
return true;
}
@Override
public boolean useMaxForLimit() {
return true;
}
};
private static final int PARAM_LIST_SIZE_LIMIT = 1000;
/**
* Constructs a Oracle8iDialect
*/
public Oracle8iDialect() {
super();
registerCharacterTypeMappings();
registerNumericTypeMappings();
registerDateTimeTypeMappings();
registerLargeObjectTypeMappings();
registerReverseHibernateTypeMappings();
registerFunctions();
registerDefaultProperties();
}
protected void registerCharacterTypeMappings() {
registerColumnType( Types.CHAR, "char(1)" );
registerColumnType( Types.VARCHAR, 4000, "varchar2($l)" );
registerColumnType( Types.VARCHAR, "long" );
}
protected void registerNumericTypeMappings() {
registerColumnType( Types.BIT, "number(1,0)" );
registerColumnType( Types.BIGINT, "number(19,0)" );
registerColumnType( Types.SMALLINT, "number(5,0)" );
registerColumnType( Types.TINYINT, "number(3,0)" );
registerColumnType( Types.INTEGER, "number(10,0)" );
registerColumnType( Types.FLOAT, "float" );
registerColumnType( Types.DOUBLE, "double precision" );
registerColumnType( Types.NUMERIC, "number($p,$s)" );
registerColumnType( Types.DECIMAL, "number($p,$s)" );
registerColumnType( Types.BOOLEAN, "number(1,0)" );
}
protected void registerDateTimeTypeMappings() {
registerColumnType( Types.DATE, "date" );
registerColumnType( Types.TIME, "date" );
registerColumnType( Types.TIMESTAMP, "date" );
}
protected void registerLargeObjectTypeMappings() {
registerColumnType( Types.BINARY, 2000, "raw($l)" );
registerColumnType( Types.BINARY, "long raw" );
registerColumnType( Types.VARBINARY, 2000, "raw($l)" );
registerColumnType( Types.VARBINARY, "long raw" );
registerColumnType( Types.BLOB, "blob" );
registerColumnType( Types.CLOB, "clob" );
registerColumnType( Types.LONGVARCHAR, "long" );
registerColumnType( Types.LONGVARBINARY, "long raw" );
}
protected void registerReverseHibernateTypeMappings() {
}
protected void registerFunctions() {
registerFunction( "abs", new StandardSQLFunction("abs") );
registerFunction( "sign", new StandardSQLFunction("sign", StandardBasicTypes.INTEGER) );
registerFunction( "acos", new StandardSQLFunction("acos", StandardBasicTypes.DOUBLE) );
registerFunction( "asin", new StandardSQLFunction("asin", StandardBasicTypes.DOUBLE) );
registerFunction( "atan", new StandardSQLFunction("atan", StandardBasicTypes.DOUBLE) );
registerFunction( "bitand", new StandardSQLFunction("bitand") );
registerFunction( "cos", new StandardSQLFunction("cos", StandardBasicTypes.DOUBLE) );
registerFunction( "cosh", new StandardSQLFunction("cosh", StandardBasicTypes.DOUBLE) );
registerFunction( "exp", new StandardSQLFunction("exp", StandardBasicTypes.DOUBLE) );
registerFunction( "ln", new StandardSQLFunction("ln", StandardBasicTypes.DOUBLE) );
registerFunction( "sin", new StandardSQLFunction("sin", StandardBasicTypes.DOUBLE) );
registerFunction( "sinh", new StandardSQLFunction("sinh", StandardBasicTypes.DOUBLE) );
registerFunction( "stddev", new StandardSQLFunction("stddev", StandardBasicTypes.DOUBLE) );
registerFunction( "sqrt", new StandardSQLFunction("sqrt", StandardBasicTypes.DOUBLE) );
registerFunction( "tan", new StandardSQLFunction("tan", StandardBasicTypes.DOUBLE) );
registerFunction( "tanh", new StandardSQLFunction("tanh", StandardBasicTypes.DOUBLE) );
registerFunction( "variance", new StandardSQLFunction("variance", StandardBasicTypes.DOUBLE) );
registerFunction( "round", new StandardSQLFunction("round") );
registerFunction( "trunc", new StandardSQLFunction("trunc") );
registerFunction( "ceil", new StandardSQLFunction("ceil") );
registerFunction( "floor", new StandardSQLFunction("floor") );
registerFunction( "chr", new StandardSQLFunction("chr", StandardBasicTypes.CHARACTER) );
registerFunction( "initcap", new StandardSQLFunction("initcap") );
registerFunction( "lower", new StandardSQLFunction("lower") );
registerFunction( "ltrim", new StandardSQLFunction("ltrim") );
registerFunction( "rtrim", new StandardSQLFunction("rtrim") );
registerFunction( "soundex", new StandardSQLFunction("soundex") );
registerFunction( "upper", new StandardSQLFunction("upper") );
registerFunction( "ascii", new StandardSQLFunction("ascii", StandardBasicTypes.INTEGER) );
registerFunction( "to_char", new StandardSQLFunction("to_char", StandardBasicTypes.STRING) );
registerFunction( "to_date", new StandardSQLFunction("to_date", StandardBasicTypes.TIMESTAMP) );
registerFunction( "current_date", new NoArgSQLFunction("current_date", StandardBasicTypes.DATE, false) );
registerFunction( "current_time", new NoArgSQLFunction("current_timestamp", StandardBasicTypes.TIME, false) );
registerFunction( "current_timestamp", new NoArgSQLFunction("current_timestamp", StandardBasicTypes.TIMESTAMP, false) );
registerFunction( "last_day", new StandardSQLFunction("last_day", StandardBasicTypes.DATE) );
registerFunction( "sysdate", new NoArgSQLFunction("sysdate", StandardBasicTypes.DATE, false) );
registerFunction( "systimestamp", new NoArgSQLFunction("systimestamp", StandardBasicTypes.TIMESTAMP, false) );
registerFunction( "uid", new NoArgSQLFunction("uid", StandardBasicTypes.INTEGER, false) );
registerFunction( "user", new NoArgSQLFunction("user", StandardBasicTypes.STRING, false) );
registerFunction( "rowid", new NoArgSQLFunction("rowid", StandardBasicTypes.LONG, false) );
registerFunction( "rownum", new NoArgSQLFunction("rownum", StandardBasicTypes.LONG, false) );
// Multi-param string dialect functions...
registerFunction( "concat", new VarArgsSQLFunction(StandardBasicTypes.STRING, "", "||", "") );
registerFunction( "instr", new StandardSQLFunction("instr", StandardBasicTypes.INTEGER) );
registerFunction( "instrb", new StandardSQLFunction("instrb", StandardBasicTypes.INTEGER) );
registerFunction( "lpad", new StandardSQLFunction("lpad", StandardBasicTypes.STRING) );
registerFunction( "replace", new StandardSQLFunction("replace", StandardBasicTypes.STRING) );
registerFunction( "rpad", new StandardSQLFunction("rpad", StandardBasicTypes.STRING) );
registerFunction( "substr", new StandardSQLFunction("substr", StandardBasicTypes.STRING) );
registerFunction( "substrb", new StandardSQLFunction("substrb", StandardBasicTypes.STRING) );
registerFunction( "translate", new StandardSQLFunction("translate", StandardBasicTypes.STRING) );
registerFunction( "substring", new StandardSQLFunction( "substr", StandardBasicTypes.STRING ) );
registerFunction( "locate", new SQLFunctionTemplate( StandardBasicTypes.INTEGER, "instr(?2,?1)" ) );
registerFunction( "bit_length", new SQLFunctionTemplate( StandardBasicTypes.INTEGER, "vsize(?1)*8" ) );
registerFunction( "coalesce", new NvlFunction() );
// Multi-param numeric dialect functions...
registerFunction( "atan2", new StandardSQLFunction("atan2", StandardBasicTypes.FLOAT) );
registerFunction( "log", new StandardSQLFunction("log", StandardBasicTypes.INTEGER) );
registerFunction( "mod", new StandardSQLFunction("mod", StandardBasicTypes.INTEGER) );
registerFunction( "nvl", new StandardSQLFunction("nvl") );
registerFunction( "nvl2", new StandardSQLFunction("nvl2") );
registerFunction( "power", new StandardSQLFunction("power", StandardBasicTypes.FLOAT) );
// Multi-param date dialect functions...
registerFunction( "add_months", new StandardSQLFunction("add_months", StandardBasicTypes.DATE) );
registerFunction( "months_between", new StandardSQLFunction("months_between", StandardBasicTypes.FLOAT) );
registerFunction( "next_day", new StandardSQLFunction("next_day", StandardBasicTypes.DATE) );
registerFunction( "str", new StandardSQLFunction("to_char", StandardBasicTypes.STRING) );
}
protected void registerDefaultProperties() {
getDefaultProperties().setProperty( Environment.USE_STREAMS_FOR_BINARY, "true" );
getDefaultProperties().setProperty( Environment.STATEMENT_BATCH_SIZE, DEFAULT_BATCH_SIZE );
// Oracle driver reports to support getGeneratedKeys(), but they only
// support the version taking an array of the names of the columns to
// be returned (via its RETURNING clause). No other driver seems to
// support this overloaded version.
getDefaultProperties().setProperty( Environment.USE_GET_GENERATED_KEYS, "false" );
getDefaultProperties().setProperty( Environment.BATCH_VERSIONED_DATA, "false" );
}
@Override
protected SqlTypeDescriptor getSqlTypeDescriptorOverride(int sqlCode) {
return sqlCode == Types.BOOLEAN ? BitTypeDescriptor.INSTANCE : super.getSqlTypeDescriptorOverride( sqlCode );
}
// features which change between 8i, 9i, and 10g ~~~~~~~~~~~~~~~~~~~~~~~~~~
@Override
public JoinFragment createOuterJoinFragment() {
return new OracleJoinFragment();
}
@Override
public String getCrossJoinSeparator() {
return ", ";
}
/**
* Map case support to the Oracle DECODE function. Oracle did not
* add support for CASE until 9i.
* <p/>
* {@inheritDoc}
*/
@Override
public CaseFragment createCaseFragment() {
return new DecodeCaseFragment();
}
@Override
public LimitHandler getLimitHandler() {
return LIMIT_HANDLER;
}
@Override
public String getLimitString(String sql, boolean hasOffset) {
sql = sql.trim();
boolean isForUpdate = false;
if ( sql.toLowerCase(Locale.ROOT).endsWith( " for update" ) ) {
sql = sql.substring( 0, sql.length()-11 );
isForUpdate = true;
}
final StringBuilder pagingSelect = new StringBuilder( sql.length()+100 );
if (hasOffset) {
pagingSelect.append( "select * from ( select row_.*, rownum rownum_ from ( " );
}
else {
pagingSelect.append( "select * from ( " );
}
pagingSelect.append( sql );
if (hasOffset) {
pagingSelect.append( " ) row_ ) where rownum_ <= ? and rownum_ > ?" );
}
else {
pagingSelect.append( " ) where rownum <= ?" );
}
if ( isForUpdate ) {
pagingSelect.append( " for update" );
}
return pagingSelect.toString();
}
/**
* Allows access to the basic {@link Dialect#getSelectClauseNullString}
* implementation...
*
* @param sqlType The {@link java.sql.Types} mapping type code
* @return The appropriate select cluse fragment
*/
public String getBasicSelectClauseNullString(int sqlType) {
return super.getSelectClauseNullString( sqlType );
}
@Override
public String getSelectClauseNullString(int sqlType) {
switch(sqlType) {
case Types.VARCHAR:
case Types.CHAR:
return "to_char(null)";
case Types.DATE:
case Types.TIMESTAMP:
case Types.TIME:
return "to_date(null)";
default:
return "to_number(null)";
}
}
@Override
public String getCurrentTimestampSelectString() {
return "select sysdate from dual";
}
@Override
public String getCurrentTimestampSQLFunctionName() {
return "sysdate";
}
// features which remain constant across 8i, 9i, and 10g ~~~~~~~~~~~~~~~~~~
@Override
public String getAddColumnString() {
return "add";
}
@Override
public String getSequenceNextValString(String sequenceName) {
return "select " + getSelectSequenceNextValString( sequenceName ) + " from dual";
}
@Override
public String getSelectSequenceNextValString(String sequenceName) {
return sequenceName + ".nextval";
}
@Override
public String getCreateSequenceString(String sequenceName) {
//starts with 1, implicitly
return "create sequence " + sequenceName;
}
@Override
public String getDropSequenceString(String sequenceName) {
return "drop sequence " + sequenceName;
}
@Override
public String getCascadeConstraintsString() {
return " cascade constraints";
}
@Override
public boolean dropConstraints() {
return false;
}
@Override
public String getForUpdateNowaitString() {
return " for update nowait";
}
@Override
public boolean supportsSequences() {
return true;
}
@Override
public boolean supportsPooledSequences() {
return true;
}
@Override
public boolean supportsLimit() {
return true;
}
@Override
public String getForUpdateString(String aliases) {
return getForUpdateString() + " of " + aliases;
}
@Override
public String getForUpdateNowaitString(String aliases) {
return getForUpdateString() + " of " + aliases + " nowait";
}
@Override
public boolean bindLimitParametersInReverseOrder() {
return true;
}
@Override
public boolean useMaxForLimit() {
return true;
}
@Override
public boolean forUpdateOfColumns() {
return true;
}
@Override
public String getQuerySequencesString() {
return " select sequence_name from all_sequences"
+ " union"
+ " select synonym_name"
+ " from all_synonyms us, all_sequences asq"
+ " where asq.sequence_name = us.table_name"
+ " and asq.sequence_owner = us.table_owner";
}
@Override
public String getSelectGUIDString() {
return "select rawtohex(sys_guid()) from dual";
}
@Override
public ViolatedConstraintNameExtracter getViolatedConstraintNameExtracter() {
return EXTRACTER;
}
private static final ViolatedConstraintNameExtracter EXTRACTER = new TemplatedViolatedConstraintNameExtracter() {
/**
* Extract the name of the violated constraint from the given SQLException.
*
* @param sqle The exception that was the result of the constraint violation.
* @return The extracted constraint name.
*/
@Override
protected String doExtractConstraintName(SQLException sqle) throws NumberFormatException {
final int errorCode = JdbcExceptionHelper.extractErrorCode( sqle );
if ( errorCode == 1 || errorCode == 2291 || errorCode == 2292 ) {
return extractUsingTemplate( "(", ")", sqle.getMessage() );
}
else if ( errorCode == 1400 ) {
// simple nullability constraint
return null;
}
else {
return null;
}
}
};
@Override
public SQLExceptionConversionDelegate buildSQLExceptionConversionDelegate() {
return new SQLExceptionConversionDelegate() {
@Override
public JDBCException convert(SQLException sqlException, String message, String sql) {
// interpreting Oracle exceptions is much much more precise based on their specific vendor codes.
final int errorCode = JdbcExceptionHelper.extractErrorCode( sqlException );
// lock timeouts ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
if ( errorCode == 30006 ) {
// ORA-30006: resource busy; acquire with WAIT timeout expired
throw new LockTimeoutException( message, sqlException, sql );
}
else if ( errorCode == 54 ) {
// ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired
throw new LockTimeoutException( message, sqlException, sql );
}
else if ( 4021 == errorCode ) {
// ORA-04021 timeout occurred while waiting to lock object
throw new LockTimeoutException( message, sqlException, sql );
}
// deadlocks ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
if ( 60 == errorCode ) {
// ORA-00060: deadlock detected while waiting for resource
return new LockAcquisitionException( message, sqlException, sql );
}
else if ( 4020 == errorCode ) {
// ORA-04020 deadlock detected while trying to lock object
return new LockAcquisitionException( message, sqlException, sql );
}
// query cancelled ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
if ( 1013 == errorCode ) {
// ORA-01013: user requested cancel of current operation
throw new QueryTimeoutException( message, sqlException, sql );
}
// data integrity violation ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
if ( 1407 == errorCode ) {
// ORA-01407: cannot update column to NULL
final String constraintName = getViolatedConstraintNameExtracter().extractConstraintName( sqlException );
return new ConstraintViolationException( message, sqlException, sql, constraintName );
}
return null;
}
};
}
@Override
public int registerResultSetOutParameter(CallableStatement statement, int col) throws SQLException {
// register the type of the out param - an Oracle specific type
statement.registerOutParameter( col, OracleTypesHelper.INSTANCE.getOracleCursorTypeSqlType() );
col++;
return col;
}
@Override
public ResultSet getResultSet(CallableStatement ps) throws SQLException {
ps.execute();
return (ResultSet) ps.getObject( 1 );
}
@Override
public boolean supportsUnionAll() {
return true;
}
@Override
public boolean supportsCommentOn() {
return true;
}
@Override
public MultiTableBulkIdStrategy getDefaultMultiTableBulkIdStrategy() {
return new GlobalTemporaryTableBulkIdStrategy(
new IdTableSupportStandardImpl() {
@Override
public String generateIdTableName(String baseName) {
final String name = super.generateIdTableName( baseName );
return name.length() > 30 ? name.substring( 0, 30 ) : name;
}
@Override
public String getCreateIdTableCommand() {
return "create global temporary table";
}
@Override
public String getCreateIdTableStatementOptions() {
return "on commit delete rows";
}
},
AfterUseAction.CLEAN
);
}
@Override
public boolean supportsCurrentTimestampSelection() {
return true;
}
@Override
public boolean isCurrentTimestampSelectStringCallable() {
return false;
}
@Override
public boolean supportsEmptyInList() {
return false;
}
@Override
public boolean supportsExistsInSelect() {
return false;
}
@Override
public int getInExpressionCountLimit() {
return PARAM_LIST_SIZE_LIMIT;
}
@Override
public boolean forceLobAsLastValue() {
return true;
}
/**
* For Oracle, the FOR UPDATE clause cannot be applied when using ORDER BY, DISTINCT or views.
* @param parameters
* @return
@see <a href="https://docs.oracle.com/database/121/SQLRF/statements_10002.htm#SQLRF01702">Oracle FOR UPDATE restrictions</a>
*/
@Override
public boolean useFollowOnLocking(QueryParameters parameters) {
if (parameters != null ) {
String lowerCaseSQL = parameters.getFilteredSQL().toLowerCase();
return
DISTINCT_KEYWORD_PATTERN.matcher( lowerCaseSQL ).find() ||
GROUP_BY_KEYWORD_PATTERN.matcher( lowerCaseSQL ).find() ||
UNION_KEYWORD_PATTERN.matcher( lowerCaseSQL ).find() ||
(
parameters.hasRowSelection() &&
(
ORDER_BY_KEYWORD_PATTERN.matcher( lowerCaseSQL ).find() ||
parameters.getRowSelection().getFirstRow() != null
)
);
}
else {
return true;
}
}
@Override
public String getNotExpression( String expression ) {
return "not (" + expression + ")";
}
@Override
public String getQueryHintString(String sql, List<String> hints) {
final String hint = StringHelper.join( ", ", hints.iterator() );
if ( StringHelper.isEmpty( hint ) ) {
return sql;
}
final int pos = sql.indexOf( "select" );
if ( pos > -1 ) {
final StringBuilder buffer = new StringBuilder( sql.length() + hint.length() + 8 );
if ( pos > 0 ) {
buffer.append( sql.substring( 0, pos ) );
}
buffer.append( "select /*+ " ).append( hint ).append( " */" )
.append( sql.substring( pos + "select".length() ) );
sql = buffer.toString();
}
return sql;
}
@Override
public int getMaxAliasLength() {
// Oracle's max identifier length is 30, but Hibernate needs to add "uniqueing info" so we account for that,
return 20;
}
@Override
public CallableStatementSupport getCallableStatementSupport() {
// Oracle supports returning cursors
return StandardCallableStatementSupport.REF_CURSOR_INSTANCE;
}
@Override
public boolean canCreateSchema() {
return false;
}
@Override
public boolean supportsPartitionBy() {
return true;
}
}