Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance.
Project price only 1 $
You can buy this project and download/modify it how often you want.
org.hibernate.dialect.AbstractHANADialect Maven / Gradle / Ivy
/*
* 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 .
*/
package org.hibernate.dialect;
import java.io.FilterReader;
import java.io.Reader;
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Types;
import java.util.Iterator;
import java.util.Map;
import org.hibernate.JDBCException;
import org.hibernate.LockMode;
import org.hibernate.LockOptions;
import org.hibernate.ScrollMode;
import org.hibernate.cfg.AvailableSettings;
import org.hibernate.dialect.function.AnsiTrimFunction;
import org.hibernate.dialect.function.NoArgSQLFunction;
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.jdbc.CharacterStream;
import org.hibernate.engine.jdbc.ClobImplementer;
import org.hibernate.engine.jdbc.NClobImplementer;
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.SQLGrammarException;
import org.hibernate.exception.spi.SQLExceptionConversionDelegate;
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.type.StandardBasicTypes;
import org.hibernate.type.descriptor.WrapperOptions;
import org.hibernate.type.descriptor.java.JavaTypeDescriptor;
import org.hibernate.type.descriptor.sql.BasicBinder;
import org.hibernate.type.descriptor.sql.BitTypeDescriptor;
import org.hibernate.type.descriptor.sql.ClobTypeDescriptor;
import org.hibernate.type.descriptor.sql.NClobTypeDescriptor;
import org.hibernate.type.descriptor.sql.SmallIntTypeDescriptor;
import org.hibernate.type.descriptor.sql.SqlTypeDescriptor;
/**
* An abstract base class for HANA dialects. SAP HANA Reference on update cascade.
*
* @author Andrew Clemons
*/
public abstract class AbstractHANADialect extends Dialect {
private static final AbstractLimitHandler LIMIT_HANDLER = new AbstractLimitHandler() {
@Override
public String processSql(String sql, RowSelection selection) {
final boolean hasOffset = LimitHelper.hasFirstRow( selection );
return sql + ( hasOffset ? " limit ? offset ?" : " limit ?" );
}
@Override
public boolean supportsLimit() {
return true;
}
@Override
public boolean bindLimitParametersInReverseOrder() {
return true;
}
};
private static class CloseSuppressingReader extends FilterReader {
protected CloseSuppressingReader(final Reader in) {
super( in );
}
@Override
public void close() {
// do not close
}
}
// the ClobTypeDescriptor and NClobTypeDescriptor for HANA are slightly
// changed from the standard ones. The HANA JDBC driver currently closes any
// stream passed in via
// PreparedStatement.setCharacterStream(int,Reader,long)
// afterQuery the stream has been processed. this causes problems later if we are
// using non-contexual lob creation and HANA then closes our StringReader.
// see test case LobLocatorTest
private static final ClobTypeDescriptor HANA_CLOB_STREAM_BINDING = new ClobTypeDescriptor() {
/** serial version uid. */
private static final long serialVersionUID = -379042275442752102L;
@Override
public BasicBinder getClobBinder(final JavaTypeDescriptor javaTypeDescriptor) {
return new BasicBinder( javaTypeDescriptor, this ) {
@Override
protected void doBind(final PreparedStatement st, final X value, final int index,
final WrapperOptions options) throws SQLException {
final CharacterStream characterStream = javaTypeDescriptor.unwrap( value, CharacterStream.class,
options );
if ( value instanceof ClobImplementer ) {
st.setCharacterStream( index, new CloseSuppressingReader( characterStream.asReader() ),
characterStream.getLength() );
}
else {
st.setCharacterStream( index, characterStream.asReader(), characterStream.getLength() );
}
}
@Override
protected void doBind(CallableStatement st, X value, String name, WrapperOptions options)
throws SQLException {
final CharacterStream characterStream = javaTypeDescriptor.unwrap(
value,
CharacterStream.class,
options
);
if ( value instanceof ClobImplementer ) {
st.setCharacterStream(
name,
new CloseSuppressingReader( characterStream.asReader() ),
characterStream.getLength()
);
}
else {
st.setCharacterStream( name, characterStream.asReader(), characterStream.getLength() );
}
}
};
}
};
private static final NClobTypeDescriptor HANA_NCLOB_STREAM_BINDING = new NClobTypeDescriptor() {
/** serial version uid. */
private static final long serialVersionUID = 5651116091681647859L;
@Override
public BasicBinder getNClobBinder(final JavaTypeDescriptor javaTypeDescriptor) {
return new BasicBinder( javaTypeDescriptor, this ) {
@Override
protected void doBind(final PreparedStatement st, final X value, final int index,
final WrapperOptions options) throws SQLException {
final CharacterStream characterStream = javaTypeDescriptor.unwrap( value, CharacterStream.class,
options );
if ( value instanceof NClobImplementer ) {
st.setCharacterStream(
index,
new CloseSuppressingReader( characterStream.asReader() ),
characterStream.getLength()
);
}
else {
st.setCharacterStream( index, characterStream.asReader(), characterStream.getLength() );
}
}
@Override
protected void doBind(CallableStatement st, X value, String name, WrapperOptions options)
throws SQLException {
final CharacterStream characterStream = javaTypeDescriptor.unwrap(
value,
CharacterStream.class,
options
);
if ( value instanceof NClobImplementer ) {
st.setCharacterStream(
name,
new CloseSuppressingReader( characterStream.asReader() ),
characterStream.getLength()
);
}
else {
st.setCharacterStream( name, characterStream.asReader(), characterStream.getLength() );
}
}
};
}
};
public AbstractHANADialect() {
super();
registerColumnType( Types.DECIMAL, "decimal($p, $s)" );
registerColumnType( Types.DOUBLE, "double" );
// varbinary max length 5000
registerColumnType( Types.BINARY, 5000, "varbinary($l)" );
registerColumnType( Types.VARBINARY, 5000, "varbinary($l)" );
registerColumnType( Types.LONGVARBINARY, 5000, "varbinary($l)" );
// for longer values, map to blob
registerColumnType( Types.BINARY, "blob" );
registerColumnType( Types.VARBINARY, "blob" );
registerColumnType( Types.LONGVARBINARY, "blob" );
registerColumnType( Types.CHAR, "varchar(1)" );
registerColumnType( Types.VARCHAR, 5000, "varchar($l)" );
registerColumnType( Types.LONGVARCHAR, 5000, "varchar($l)" );
registerColumnType( Types.NVARCHAR, 5000, "nvarchar($l)" );
// for longer values map to clob/nclob
registerColumnType( Types.LONGVARCHAR, "clob" );
registerColumnType( Types.VARCHAR, "clob" );
registerColumnType( Types.NVARCHAR, "nclob" );
registerColumnType( Types.CLOB, "clob" );
registerColumnType( Types.BOOLEAN, "tinyint" );
// map bit/tinyint to smallint since tinyint is unsigned on HANA
registerColumnType( Types.BIT, "smallint" );
registerColumnType( Types.TINYINT, "smallint" );
registerHibernateType( Types.NCLOB, StandardBasicTypes.NCLOB.getName() );
registerHibernateType( Types.NVARCHAR, StandardBasicTypes.STRING.getName() );
registerFunction( "to_date", new StandardSQLFunction( "to_date", StandardBasicTypes.DATE ) );
registerFunction( "to_seconddate", new StandardSQLFunction( "to_seconddate", StandardBasicTypes.TIMESTAMP ) );
registerFunction( "to_time", new StandardSQLFunction( "to_time", StandardBasicTypes.TIME ) );
registerFunction( "to_timestamp", new StandardSQLFunction( "to_timestamp", StandardBasicTypes.TIMESTAMP ) );
registerFunction( "current_date", new NoArgSQLFunction( "current_date", StandardBasicTypes.DATE, false ) );
registerFunction( "current_time", new NoArgSQLFunction( "current_time", StandardBasicTypes.TIME, false ) );
registerFunction( "current_timestamp", new NoArgSQLFunction( "current_timestamp", StandardBasicTypes.TIMESTAMP,
false ) );
registerFunction( "current_utcdate", new NoArgSQLFunction( "current_utcdate", StandardBasicTypes.DATE, false ) );
registerFunction( "current_utctime", new NoArgSQLFunction( "current_utctime", StandardBasicTypes.TIME, false ) );
registerFunction( "current_utctimestamp", new NoArgSQLFunction( "current_utctimestamp",
StandardBasicTypes.TIMESTAMP, false ) );
registerFunction( "add_days", new StandardSQLFunction( "add_days" ) );
registerFunction( "add_months", new StandardSQLFunction( "add_months" ) );
registerFunction( "add_seconds", new StandardSQLFunction( "add_seconds" ) );
registerFunction( "add_years", new StandardSQLFunction( "add_years" ) );
registerFunction( "dayname", new StandardSQLFunction( "dayname", StandardBasicTypes.STRING ) );
registerFunction( "dayofmonth", new StandardSQLFunction( "dayofmonth", StandardBasicTypes.INTEGER ) );
registerFunction( "dayofyear", new StandardSQLFunction( "dayofyear", StandardBasicTypes.INTEGER ) );
registerFunction( "days_between", new StandardSQLFunction( "days_between", StandardBasicTypes.INTEGER ) );
registerFunction( "hour", new StandardSQLFunction( "hour", StandardBasicTypes.INTEGER ) );
registerFunction( "isoweek", new StandardSQLFunction( "isoweek", StandardBasicTypes.STRING ) );
registerFunction( "last_day", new StandardSQLFunction( "last_day", StandardBasicTypes.DATE ) );
registerFunction( "localtoutc", new StandardSQLFunction( "localtoutc", StandardBasicTypes.TIMESTAMP ) );
registerFunction( "minute", new StandardSQLFunction( "minute", StandardBasicTypes.INTEGER ) );
registerFunction( "month", new StandardSQLFunction( "month", StandardBasicTypes.INTEGER ) );
registerFunction( "monthname", new StandardSQLFunction( "monthname", StandardBasicTypes.STRING ) );
registerFunction( "next_day", new StandardSQLFunction( "next_day", StandardBasicTypes.DATE ) );
registerFunction( "now", new NoArgSQLFunction( "now", StandardBasicTypes.TIMESTAMP, true ) );
registerFunction( "quarter", new StandardSQLFunction( "quarter", StandardBasicTypes.STRING ) );
registerFunction( "second", new StandardSQLFunction( "second", StandardBasicTypes.INTEGER ) );
registerFunction( "seconds_between", new StandardSQLFunction( "seconds_between", StandardBasicTypes.LONG ) );
registerFunction( "week", new StandardSQLFunction( "week", StandardBasicTypes.INTEGER ) );
registerFunction( "weekday", new StandardSQLFunction( "weekday", StandardBasicTypes.INTEGER ) );
registerFunction( "year", new StandardSQLFunction( "year", StandardBasicTypes.INTEGER ) );
registerFunction( "utctolocal", new StandardSQLFunction( "utctolocal", StandardBasicTypes.TIMESTAMP ) );
registerFunction( "to_bigint", new StandardSQLFunction( "to_bigint", StandardBasicTypes.LONG ) );
registerFunction( "to_binary", new StandardSQLFunction( "to_binary", StandardBasicTypes.BINARY ) );
registerFunction( "to_decimal", new StandardSQLFunction( "to_decimal", StandardBasicTypes.BIG_DECIMAL ) );
registerFunction( "to_double", new StandardSQLFunction( "to_double", StandardBasicTypes.DOUBLE ) );
registerFunction( "to_int", new StandardSQLFunction( "to_int", StandardBasicTypes.INTEGER ) );
registerFunction( "to_integer", new StandardSQLFunction( "to_integer", StandardBasicTypes.INTEGER ) );
registerFunction( "to_real", new StandardSQLFunction( "to_real", StandardBasicTypes.FLOAT ) );
registerFunction( "to_smalldecimal",
new StandardSQLFunction( "to_smalldecimal", StandardBasicTypes.BIG_DECIMAL ) );
registerFunction( "to_smallint", new StandardSQLFunction( "to_smallint", StandardBasicTypes.SHORT ) );
registerFunction( "to_tinyint", new StandardSQLFunction( "to_tinyint", StandardBasicTypes.BYTE ) );
registerFunction( "abs", new StandardSQLFunction( "abs" ) );
registerFunction( "acos", new StandardSQLFunction( "acos", StandardBasicTypes.DOUBLE ) );
registerFunction( "asin", new StandardSQLFunction( "asin", StandardBasicTypes.DOUBLE ) );
registerFunction( "atan2", new StandardSQLFunction( "atan", StandardBasicTypes.DOUBLE ) );
registerFunction( "bin2hex", new StandardSQLFunction( "bin2hex", StandardBasicTypes.STRING ) );
registerFunction( "bitand", new StandardSQLFunction( "bitand", StandardBasicTypes.LONG ) );
registerFunction( "ceil", new StandardSQLFunction( "ceil" ) );
registerFunction( "cos", new StandardSQLFunction( "cos", StandardBasicTypes.DOUBLE ) );
registerFunction( "cosh", new StandardSQLFunction( "cosh", StandardBasicTypes.DOUBLE ) );
registerFunction( "cot", new StandardSQLFunction( "cos", StandardBasicTypes.DOUBLE ) );
registerFunction( "exp", new StandardSQLFunction( "exp", StandardBasicTypes.DOUBLE ) );
registerFunction( "floor", new StandardSQLFunction( "floor" ) );
registerFunction( "greatest", new StandardSQLFunction( "greatest" ) );
registerFunction( "hex2bin", new StandardSQLFunction( "hex2bin", StandardBasicTypes.BINARY ) );
registerFunction( "least", new StandardSQLFunction( "least" ) );
registerFunction( "ln", new StandardSQLFunction( "ln", StandardBasicTypes.DOUBLE ) );
registerFunction( "log", new StandardSQLFunction( "ln", StandardBasicTypes.DOUBLE ) );
registerFunction( "power", new StandardSQLFunction( "power" ) );
registerFunction( "round", new StandardSQLFunction( "round" ) );
registerFunction( "mod", new StandardSQLFunction( "mod", StandardBasicTypes.INTEGER ) );
registerFunction( "sign", new StandardSQLFunction( "sign", StandardBasicTypes.INTEGER ) );
registerFunction( "sin", new StandardSQLFunction( "sin", StandardBasicTypes.DOUBLE ) );
registerFunction( "sinh", new StandardSQLFunction( "sinh", StandardBasicTypes.DOUBLE ) );
registerFunction( "sqrt", new StandardSQLFunction( "sqrt", StandardBasicTypes.DOUBLE ) );
registerFunction( "tan", new StandardSQLFunction( "tan", StandardBasicTypes.DOUBLE ) );
registerFunction( "tanh", new StandardSQLFunction( "tanh", StandardBasicTypes.DOUBLE ) );
registerFunction( "uminus", new StandardSQLFunction( "uminus" ) );
registerFunction( "to_alphanum", new StandardSQLFunction( "to_alphanum", StandardBasicTypes.STRING ) );
registerFunction( "to_nvarchar", new StandardSQLFunction( "to_nvarchar", StandardBasicTypes.STRING ) );
registerFunction( "to_varchar", new StandardSQLFunction( "to_varchar", StandardBasicTypes.STRING ) );
registerFunction( "ascii", new StandardSQLFunction( "ascii", StandardBasicTypes.INTEGER ) );
registerFunction( "char", new StandardSQLFunction( "char", StandardBasicTypes.CHARACTER ) );
registerFunction( "concat", new VarArgsSQLFunction( StandardBasicTypes.STRING, "(", "||", ")" ) );
registerFunction( "lcase", new StandardSQLFunction( "lcase", StandardBasicTypes.STRING ) );
registerFunction( "left", new StandardSQLFunction( "left", StandardBasicTypes.STRING ) );
registerFunction( "length", new StandardSQLFunction( "length", StandardBasicTypes.LONG ) );
registerFunction( "locate", new StandardSQLFunction( "locate", StandardBasicTypes.INTEGER ) );
registerFunction( "lpad", new StandardSQLFunction( "lpad", StandardBasicTypes.STRING ) );
registerFunction( "ltrim", new StandardSQLFunction( "ltrim", StandardBasicTypes.STRING ) );
registerFunction( "nchar", new StandardSQLFunction( "nchar", StandardBasicTypes.STRING ) );
registerFunction( "replace", new StandardSQLFunction( "replace", StandardBasicTypes.STRING ) );
registerFunction( "right", new StandardSQLFunction( "right", StandardBasicTypes.STRING ) );
registerFunction( "rpad", new StandardSQLFunction( "rpad", StandardBasicTypes.STRING ) );
registerFunction( "rtrim", new StandardSQLFunction( "rtrim", StandardBasicTypes.STRING ) );
registerFunction( "substr_after", new StandardSQLFunction( "substr_after", StandardBasicTypes.STRING ) );
registerFunction( "substr_before", new StandardSQLFunction( "substr_before", StandardBasicTypes.STRING ) );
registerFunction( "substring", new StandardSQLFunction( "substring", StandardBasicTypes.STRING ) );
registerFunction( "trim", new AnsiTrimFunction() );
registerFunction( "ucase", new StandardSQLFunction( "ucase", StandardBasicTypes.STRING ) );
registerFunction( "unicode", new StandardSQLFunction( "unicode", StandardBasicTypes.INTEGER ) );
registerFunction( "bit_length", new SQLFunctionTemplate( StandardBasicTypes.INTEGER, "length(to_binary(?1))*8" ) );
registerFunction( "to_blob", new StandardSQLFunction( "to_blob", StandardBasicTypes.BLOB ) );
registerFunction( "to_clob", new StandardSQLFunction( "to_clob", StandardBasicTypes.CLOB ) );
registerFunction( "to_nclob", new StandardSQLFunction( "to_nclob", StandardBasicTypes.NCLOB ) );
registerFunction( "coalesce", new StandardSQLFunction( "coalesce" ) );
registerFunction( "current_connection", new NoArgSQLFunction( "current_connection", StandardBasicTypes.INTEGER,
false ) );
registerFunction( "current_schema", new NoArgSQLFunction( "current_schema", StandardBasicTypes.STRING, false ) );
registerFunction( "current_user", new NoArgSQLFunction( "current_user", StandardBasicTypes.STRING, false ) );
registerFunction( "grouping_id", new VarArgsSQLFunction( StandardBasicTypes.INTEGER, "(", ",", ")" ) );
registerFunction( "ifnull", new StandardSQLFunction( "ifnull" ) );
registerFunction( "map", new StandardSQLFunction( "map" ) );
registerFunction( "nullif", new StandardSQLFunction( "nullif" ) );
registerFunction( "session_context", new StandardSQLFunction( "session_context" ) );
registerFunction( "session_user", new NoArgSQLFunction( "session_user", StandardBasicTypes.STRING, false ) );
registerFunction( "sysuuid", new NoArgSQLFunction( "sysuuid", StandardBasicTypes.STRING, false ) );
registerHanaKeywords();
// createBlob() and createClob() are not supported by the HANA JDBC driver
getDefaultProperties().setProperty( AvailableSettings.NON_CONTEXTUAL_LOB_CREATION, "true" );
}
@Override
public boolean bindLimitParametersInReverseOrder() {
return true;
}
@Override
public SQLExceptionConversionDelegate buildSQLExceptionConversionDelegate() {
return new SQLExceptionConversionDelegate() {
@Override
public JDBCException convert(final SQLException sqlException, final String message, final String sql) {
final int errorCode = JdbcExceptionHelper.extractErrorCode( sqlException );
if ( errorCode == 131 ) {
// 131 - Transaction rolled back by lock wait timeout
return new LockTimeoutException( message, sqlException, sql );
}
if ( errorCode == 146 ) {
// 146 - Resource busy and acquire with NOWAIT specified
return new LockTimeoutException( message, sqlException, sql );
}
if ( errorCode == 132 ) {
// 132 - Transaction rolled back due to unavailable resource
return new LockAcquisitionException( message, sqlException, sql );
}
if ( errorCode == 133 ) {
// 133 - Transaction rolled back by detected deadlock
return new LockAcquisitionException( message, sqlException, sql );
}
// 259 - Invalid table name
// 260 - Invalid column name
// 261 - Invalid index name
// 262 - Invalid query name
// 263 - Invalid alias name
if ( errorCode == 257 || ( errorCode >= 259 && errorCode <= 263 ) ) {
throw new SQLGrammarException( message, sqlException, sql );
}
// 257 - Cannot insert NULL or update to NULL
// 301 - Unique constraint violated
// 461 - foreign key constraint violation
// 462 - failed on update or delete by foreign key constraint violation
if ( errorCode == 287 || errorCode == 301 || errorCode == 461 || errorCode == 462 ) {
final String constraintName = getViolatedConstraintNameExtracter().extractConstraintName(
sqlException );
return new ConstraintViolationException( message, sqlException, sql, constraintName );
}
return null;
}
};
}
@Override
public boolean forUpdateOfColumns() {
return true;
}
@Override
public String getAddColumnString() {
return "add (";
}
@Override
public String getAddColumnSuffixString() {
return ")";
}
@Override
public String getCascadeConstraintsString() {
return " cascade";
}
@Override
public String getCreateSequenceString(final String sequenceName) {
return "create sequence " + sequenceName;
}
@Override
public MultiTableBulkIdStrategy getDefaultMultiTableBulkIdStrategy() {
return new GlobalTemporaryTableBulkIdStrategy(
new IdTableSupportStandardImpl() {
@Override
public String getCreateIdTableCommand() {
return "create global temporary table";
}
},
AfterUseAction.CLEAN
);
}
@Override
public String getCurrentTimestampSelectString() {
return "select current_timestamp from dummy";
}
@Override
public String getDropSequenceString(final String sequenceName) {
return "drop sequence " + sequenceName;
}
@Override
public String getForUpdateString(final String aliases) {
return getForUpdateString() + " of " + aliases;
}
@Override
public String getForUpdateString(final String aliases, final LockOptions lockOptions) {
LockMode lockMode = lockOptions.getLockMode();
final Iterator> itr = lockOptions.getAliasLockIterator();
while ( itr.hasNext() ) {
// seek the highest lock mode
final Map.Entry entry = itr.next();
final LockMode lm = entry.getValue();
if ( lm.greaterThan( lockMode ) ) {
lockMode = lm;
}
}
// not sure why this is sometimes empty
if ( aliases == null || "".equals( aliases ) ) {
return getForUpdateString( lockMode );
}
String clause = getForUpdateString( lockMode ) + " of " + aliases;
if(lockOptions.getTimeOut() == LockOptions.NO_WAIT) {
clause += " nowait";
}
return clause;
}
public String getForUpdateNowaitString() {
return getForUpdateString() + " nowait";
}
@Override
public String getReadLockString(int timeout) {
return getWriteLockString( timeout );
}
@Override
public String getWriteLockString(int timeout) {
if ( timeout == LockOptions.NO_WAIT ) {
return getForUpdateNowaitString();
}
else {
return getForUpdateString();
}
}
@Override
public String getLimitString(final String sql, final boolean hasOffset) {
return new StringBuilder( sql.length() + 20 ).append( sql )
.append( hasOffset ? " limit ? offset ?" : " limit ?" ).toString();
}
@Override
public String getNotExpression(final String expression) {
return "not (" + expression + ")";
}
@Override
public String getQuerySequencesString() {
return "select sequence_name from sys.sequences";
}
@Override
public String getSelectSequenceNextValString(final String sequenceName) {
return sequenceName + ".nextval";
}
@Override
public String getSequenceNextValString(final String sequenceName) {
return "select " + getSelectSequenceNextValString( sequenceName ) + " from dummy";
}
@Override
protected SqlTypeDescriptor getSqlTypeDescriptorOverride(final int sqlCode) {
switch ( sqlCode ) {
case Types.BOOLEAN:
return BitTypeDescriptor.INSTANCE;
case Types.CLOB:
return HANA_CLOB_STREAM_BINDING;
case Types.NCLOB:
return HANA_NCLOB_STREAM_BINDING;
case Types.TINYINT:
// tinyint is unsigned on HANA
return SmallIntTypeDescriptor.INSTANCE;
default:
return super.getSqlTypeDescriptorOverride( sqlCode );
}
}
@Override
public boolean isCurrentTimestampSelectStringCallable() {
return false;
}
protected void registerHanaKeywords() {
registerKeyword( "all" );
registerKeyword( "alter" );
registerKeyword( "as" );
registerKeyword( "beforeQuery" );
registerKeyword( "begin" );
registerKeyword( "both" );
registerKeyword( "case" );
registerKeyword( "char" );
registerKeyword( "condition" );
registerKeyword( "connect" );
registerKeyword( "cross" );
registerKeyword( "cube" );
registerKeyword( "current_connection" );
registerKeyword( "current_date" );
registerKeyword( "current_schema" );
registerKeyword( "current_time" );
registerKeyword( "current_timestamp" );
registerKeyword( "current_user" );
registerKeyword( "current_utcdate" );
registerKeyword( "current_utctime" );
registerKeyword( "current_utctimestamp" );
registerKeyword( "currval" );
registerKeyword( "cursor" );
registerKeyword( "declare" );
registerKeyword( "distinct" );
registerKeyword( "else" );
registerKeyword( "elseif" );
registerKeyword( "elsif" );
registerKeyword( "end" );
registerKeyword( "except" );
registerKeyword( "exception" );
registerKeyword( "exec" );
registerKeyword( "for" );
registerKeyword( "from" );
registerKeyword( "full" );
registerKeyword( "group" );
registerKeyword( "having" );
registerKeyword( "if" );
registerKeyword( "in" );
registerKeyword( "inner" );
registerKeyword( "inout" );
registerKeyword( "intersect" );
registerKeyword( "into" );
registerKeyword( "is" );
registerKeyword( "join" );
registerKeyword( "leading" );
registerKeyword( "left" );
registerKeyword( "limit" );
registerKeyword( "loop" );
registerKeyword( "minus" );
registerKeyword( "natural" );
registerKeyword( "nextval" );
registerKeyword( "null" );
registerKeyword( "on" );
registerKeyword( "order" );
registerKeyword( "out" );
registerKeyword( "prior" );
registerKeyword( "return" );
registerKeyword( "returns" );
registerKeyword( "reverse" );
registerKeyword( "right" );
registerKeyword( "rollup" );
registerKeyword( "rowid" );
registerKeyword( "select" );
registerKeyword( "set" );
registerKeyword( "sql" );
registerKeyword( "start" );
registerKeyword( "sysdate" );
registerKeyword( "systime" );
registerKeyword( "systimestamp" );
registerKeyword( "sysuuid" );
registerKeyword( "top" );
registerKeyword( "trailing" );
registerKeyword( "union" );
registerKeyword( "using" );
registerKeyword( "utcdate" );
registerKeyword( "utctime" );
registerKeyword( "utctimestamp" );
registerKeyword( "values" );
registerKeyword( "when" );
registerKeyword( "where" );
registerKeyword( "while" );
registerKeyword( "with" );
}
@Override
public boolean supportsCircularCascadeDeleteConstraints() {
// HANA does not support circular constraints
return false;
}
@Override
public ScrollMode defaultScrollMode() {
return ScrollMode.FORWARD_ONLY;
}
/**
* HANA currently does not support check constraints.
*/
@Override
public boolean supportsColumnCheck() {
return false;
}
@Override
public boolean supportsCurrentTimestampSelection() {
return true;
}
@Override
public boolean supportsEmptyInList() {
return false;
}
@Override
public boolean supportsExistsInSelect() {
return false;
}
@Override
public boolean supportsExpectedLobUsagePattern() {
// http://scn.sap.com/thread/3221812
return false;
}
@Override
public boolean supportsLimit() {
return true;
}
@Override
public boolean supportsPooledSequences() {
return true;
}
@Override
public boolean supportsSequences() {
return true;
}
@Override
public boolean supportsTableCheck() {
return false;
}
@Override
public boolean supportsTupleDistinctCounts() {
return false;
}
@Override
public boolean supportsUnionAll() {
return true;
}
@Override
public boolean dropConstraints() {
return false;
}
@Override
public boolean supportsRowValueConstructorSyntax() {
return true;
}
@Override
public boolean supportsRowValueConstructorSyntaxInInList() {
return true;
}
@Override
public int getMaxAliasLength() {
return 128;
}
/**
* The default behaviour for 'on update restrict' on HANA is currently
* to not allow any updates to any column of a row if the row has a
* foreign key. Make the default for foreign keys have 'on update cascade'
* to work around the issue.
*/
@Override
public String getAddForeignKeyConstraintString(final String constraintName, final String[] foreignKey,
final String referencedTable, final String[] primaryKey, final boolean referencesPrimaryKey) {
return super.getAddForeignKeyConstraintString(constraintName, foreignKey, referencedTable, primaryKey, referencesPrimaryKey) + " on update cascade";
}
@Override
public LimitHandler getLimitHandler() {
return LIMIT_HANDLER;
}
}
