org.hibernate.dialect.AbstractHANADialect Maven / Gradle / Ivy
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/*
* 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.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FilterInputStream;
import java.io.FilterReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.StringReader;
import java.io.Writer;
import java.nio.charset.StandardCharsets;
import java.sql.Blob;
import java.sql.CallableStatement;
import java.sql.Clob;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.NClob;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.SQLFeatureNotSupportedException;
import java.sql.Statement;
import java.sql.Types;
import java.util.Arrays;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.hibernate.JDBCException;
import org.hibernate.LockMode;
import org.hibernate.LockOptions;
import org.hibernate.MappingException;
import org.hibernate.ScrollMode;
import org.hibernate.boot.model.TypeContributions;
import org.hibernate.boot.model.naming.Identifier;
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.identity.HANAIdentityColumnSupport;
import org.hibernate.dialect.identity.IdentityColumnSupport;
import org.hibernate.dialect.pagination.AbstractLimitHandler;
import org.hibernate.dialect.pagination.LimitHandler;
import org.hibernate.dialect.pagination.LimitHelper;
import org.hibernate.engine.config.spi.ConfigurationService;
import org.hibernate.engine.config.spi.ConfigurationService.Converter;
import org.hibernate.engine.config.spi.StandardConverters;
import org.hibernate.engine.jdbc.BinaryStream;
import org.hibernate.engine.jdbc.BlobImplementer;
import org.hibernate.engine.jdbc.CharacterStream;
import org.hibernate.engine.jdbc.ClobImplementer;
import org.hibernate.engine.jdbc.NClobImplementer;
import org.hibernate.engine.jdbc.connections.spi.ConnectionProvider;
import org.hibernate.engine.jdbc.env.spi.AnsiSqlKeywords;
import org.hibernate.engine.jdbc.env.spi.IdentifierCaseStrategy;
import org.hibernate.engine.jdbc.env.spi.IdentifierHelper;
import org.hibernate.engine.jdbc.env.spi.IdentifierHelperBuilder;
import org.hibernate.engine.jdbc.env.spi.NameQualifierSupport;
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.internal.CoreLogging;
import org.hibernate.internal.CoreMessageLogger;
import org.hibernate.internal.util.JdbcExceptionHelper;
import org.hibernate.mapping.Table;
import org.hibernate.procedure.internal.StandardCallableStatementSupport;
import org.hibernate.procedure.spi.CallableStatementSupport;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.tool.schema.extract.internal.SequenceInformationExtractorHANADatabaseImpl;
import org.hibernate.tool.schema.extract.spi.SequenceInformationExtractor;
import org.hibernate.tool.schema.internal.StandardTableExporter;
import org.hibernate.tool.schema.spi.Exporter;
import org.hibernate.type.StandardBasicTypes;
import org.hibernate.type.descriptor.ValueBinder;
import org.hibernate.type.descriptor.ValueExtractor;
import org.hibernate.type.descriptor.WrapperOptions;
import org.hibernate.type.descriptor.java.DataHelper;
import org.hibernate.type.descriptor.java.JavaTypeDescriptor;
import org.hibernate.type.descriptor.sql.BasicBinder;
import org.hibernate.type.descriptor.sql.BasicExtractor;
import org.hibernate.type.descriptor.sql.BitTypeDescriptor;
import org.hibernate.type.descriptor.sql.BlobTypeDescriptor;
import org.hibernate.type.descriptor.sql.BooleanTypeDescriptor;
import org.hibernate.type.descriptor.sql.CharTypeDescriptor;
import org.hibernate.type.descriptor.sql.ClobTypeDescriptor;
import org.hibernate.type.descriptor.sql.DecimalTypeDescriptor;
import org.hibernate.type.descriptor.sql.DoubleTypeDescriptor;
import org.hibernate.type.descriptor.sql.NCharTypeDescriptor;
import org.hibernate.type.descriptor.sql.NClobTypeDescriptor;
import org.hibernate.type.descriptor.sql.NVarcharTypeDescriptor;
import org.hibernate.type.descriptor.sql.SmallIntTypeDescriptor;
import org.hibernate.type.descriptor.sql.SqlTypeDescriptor;
import org.hibernate.type.descriptor.sql.VarcharTypeDescriptor;
/**
* An abstract base class for SAP HANA dialects.
*
* For more information on interacting with the SAP HANA database, refer to the
* SAP HANA SQL and System Views Reference
* and the SAP
* HANA Client Interface Programming Reference.
*
* Note: This dialect is configured to create foreign keys with {@code on update cascade}.
*
* @author Andrew Clemons
* @author Jonathan Bregler
*/
public abstract class AbstractHANADialect extends Dialect {
private static final CoreMessageLogger LOG = CoreLogging.messageLogger( AbstractHANADialect.class );
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
}
}
private static class CloseSuppressingInputStream extends FilterInputStream {
protected CloseSuppressingInputStream(final InputStream in) {
super( in );
}
@Override
public void close() {
// do not close
}
}
private static class MaterializedBlob implements Blob {
private byte[] bytes = null;
public MaterializedBlob(byte[] bytes) {
this.setBytes( bytes );
}
@Override
public long length() throws SQLException {
return this.getBytes().length;
}
@Override
public byte[] getBytes(long pos, int length) throws SQLException {
return Arrays.copyOfRange( this.bytes, (int) ( pos - 1 ), (int) ( pos - 1 + length ) );
}
@Override
public InputStream getBinaryStream() throws SQLException {
return new ByteArrayInputStream( this.getBytes() );
}
@Override
public long position(byte[] pattern, long start) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public long position(Blob pattern, long start) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public int setBytes(long pos, byte[] bytes) throws SQLException {
int bytesSet = 0;
if ( this.bytes.length < pos - 1 + bytes.length ) {
this.bytes = Arrays.copyOf( this.bytes, (int) ( pos - 1 + bytes.length ) );
}
for ( int i = 0; i < bytes.length && i < this.bytes.length; i++, bytesSet++ ) {
this.bytes[(int) ( i + pos - 1 )] = bytes[i];
}
return bytesSet;
}
@Override
public int setBytes(long pos, byte[] bytes, int offset, int len) throws SQLException {
int bytesSet = 0;
if ( this.bytes.length < pos - 1 + len ) {
this.bytes = Arrays.copyOf( this.bytes, (int) ( pos - 1 + len ) );
}
for ( int i = offset; i < len && i < this.bytes.length; i++, bytesSet++ ) {
this.bytes[(int) ( i + pos - 1 )] = bytes[i];
}
return bytesSet;
}
@Override
public OutputStream setBinaryStream(long pos) throws SQLException {
return new ByteArrayOutputStream() {
{
this.buf = getBytes();
}
};
}
@Override
public void truncate(long len) throws SQLException {
this.setBytes( Arrays.copyOf( this.getBytes(), (int) len ) );
}
@Override
public void free() throws SQLException {
this.setBytes( null );
}
@Override
public InputStream getBinaryStream(long pos, long length) throws SQLException {
return new ByteArrayInputStream( this.getBytes(), (int) ( pos - 1 ), (int) length );
}
byte[] getBytes() {
return this.bytes;
}
void setBytes(byte[] bytes) {
this.bytes = bytes;
}
}
private static class MaterializedNClob implements NClob {
private String data = null;
public MaterializedNClob(String data) {
this.data = data;
}
@Override
public void truncate(long len) throws SQLException {
this.data = new String();
}
@Override
public int setString(long pos, String str, int offset, int len) throws SQLException {
this.data = this.data.substring( 0, (int) ( pos - 1 ) ) + str.substring( offset, offset + len )
+ this.data.substring( (int) ( pos - 1 + len ) );
return len;
}
@Override
public int setString(long pos, String str) throws SQLException {
this.data = this.data.substring( 0, (int) ( pos - 1 ) ) + str + this.data.substring( (int) ( pos - 1 + str.length() ) );
return str.length();
}
@Override
public Writer setCharacterStream(long pos) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public OutputStream setAsciiStream(long pos) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
@Override
public long position(Clob searchstr, long start) throws SQLException {
return this.data.indexOf( DataHelper.extractString( searchstr ), (int) ( start - 1 ) );
}
@Override
public long position(String searchstr, long start) throws SQLException {
return this.data.indexOf( searchstr, (int) ( start - 1 ) );
}
@Override
public long length() throws SQLException {
return this.data.length();
}
@Override
public String getSubString(long pos, int length) throws SQLException {
return this.data.substring( (int) ( pos - 1 ), (int) ( pos - 1 + length ) );
}
@Override
public Reader getCharacterStream(long pos, long length) throws SQLException {
return new StringReader( this.data.substring( (int) ( pos - 1 ), (int) ( pos - 1 + length ) ) );
}
@Override
public Reader getCharacterStream() throws SQLException {
return new StringReader( this.data );
}
@Override
public InputStream getAsciiStream() throws SQLException {
return new ByteArrayInputStream( this.data.getBytes( StandardCharsets.ISO_8859_1 ) );
}
@Override
public void free() throws SQLException {
this.data = null;
}
}
private static class HANAStreamBlobTypeDescriptor implements SqlTypeDescriptor {
private static final long serialVersionUID = -2476600722093442047L;
final int maxLobPrefetchSize;
public HANAStreamBlobTypeDescriptor(int maxLobPrefetchSize) {
this.maxLobPrefetchSize = maxLobPrefetchSize;
}
@Override
public int getSqlType() {
return Types.BLOB;
}
@Override
public boolean canBeRemapped() {
return true;
}
@Override
public ValueBinder getBinder(JavaTypeDescriptor javaTypeDescriptor) {
return new BasicBinder( javaTypeDescriptor, this ) {
@Override
protected void doBind(PreparedStatement st, X value, int index, WrapperOptions options) throws SQLException {
final BinaryStream binaryStream = javaTypeDescriptor.unwrap( value, BinaryStream.class, options );
if ( value instanceof BlobImplementer ) {
try ( InputStream is = new CloseSuppressingInputStream( binaryStream.getInputStream() ) ) {
st.setBinaryStream( index, is, binaryStream.getLength() );
}
catch (IOException e) {
// can't happen => ignore
}
}
else {
st.setBinaryStream( index, binaryStream.getInputStream(), binaryStream.getLength() );
}
}
@Override
protected void doBind(CallableStatement st, X value, String name, WrapperOptions options) throws SQLException {
final BinaryStream binaryStream = javaTypeDescriptor.unwrap( value, BinaryStream.class, options );
if ( value instanceof BlobImplementer ) {
try ( InputStream is = new CloseSuppressingInputStream( binaryStream.getInputStream() ) ) {
st.setBinaryStream( name, is, binaryStream.getLength() );
}
catch (IOException e) {
// can't happen => ignore
}
}
else {
st.setBinaryStream( name, binaryStream.getInputStream(), binaryStream.getLength() );
}
}
};
}
@Override
public ValueExtractor getExtractor(JavaTypeDescriptor javaTypeDescriptor) {
return new BasicExtractor( javaTypeDescriptor, this ) {
@Override
protected X doExtract(ResultSet rs, String name, WrapperOptions options) throws SQLException {
Blob rsBlob = rs.getBlob( name );
if ( rsBlob == null || rsBlob.length() < HANAStreamBlobTypeDescriptor.this.maxLobPrefetchSize ) {
return javaTypeDescriptor.wrap( rsBlob, options );
}
Blob blob = new MaterializedBlob( DataHelper.extractBytes( rsBlob.getBinaryStream() ) );
return javaTypeDescriptor.wrap( blob, options );
}
@Override
protected X doExtract(CallableStatement statement, int index, WrapperOptions options) throws SQLException {
return javaTypeDescriptor.wrap( statement.getBlob( index ), options );
}
@Override
protected X doExtract(CallableStatement statement, String name, WrapperOptions options) throws SQLException {
return javaTypeDescriptor.wrap( statement.getBlob( name ), options );
}
};
}
}
// 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)
// after 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 class HANAClobTypeDescriptor extends ClobTypeDescriptor {
/** serial version uid. */
private static final long serialVersionUID = -379042275442752102L;
final int maxLobPrefetchSize;
final boolean useUnicodeStringTypes;
public HANAClobTypeDescriptor(int maxLobPrefetchSize, boolean useUnicodeStringTypes) {
this.maxLobPrefetchSize = maxLobPrefetchSize;
this.useUnicodeStringTypes = useUnicodeStringTypes;
}
@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 ) {
try ( Reader r = new CloseSuppressingReader( characterStream.asReader() ) ) {
st.setCharacterStream( index, r, characterStream.getLength() );
}
catch (IOException e) {
// can't happen => ignore
}
}
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 ) {
try ( Reader r = new CloseSuppressingReader( characterStream.asReader() ) ) {
st.setCharacterStream( name, r, characterStream.getLength() );
}
catch (IOException e) {
// can't happen => ignore
}
}
else {
st.setCharacterStream( name, characterStream.asReader(), characterStream.getLength() );
}
}
};
}
@Override
public ValueExtractor getExtractor(JavaTypeDescriptor javaTypeDescriptor) {
return new BasicExtractor( javaTypeDescriptor, this ) {
@Override
protected X doExtract(ResultSet rs, String name, WrapperOptions options) throws SQLException {
Clob rsClob;
if ( HANAClobTypeDescriptor.this.useUnicodeStringTypes ) {
rsClob = rs.getNClob( name );
}
else {
rsClob = rs.getClob( name );
}
if ( rsClob == null || rsClob.length() < HANAClobTypeDescriptor.this.maxLobPrefetchSize ) {
return javaTypeDescriptor.wrap( rsClob, options );
}
Clob clob = new MaterializedNClob( DataHelper.extractString( rsClob ) );
return javaTypeDescriptor.wrap( clob, options );
}
@Override
protected X doExtract(CallableStatement statement, int index, WrapperOptions options) throws SQLException {
return javaTypeDescriptor.wrap( statement.getClob( index ), options );
}
@Override
protected X doExtract(CallableStatement statement, String name, WrapperOptions options) throws SQLException {
return javaTypeDescriptor.wrap( statement.getClob( name ), options );
}
};
}
public int getMaxLobPrefetchSize() {
return this.maxLobPrefetchSize;
}
public boolean isUseUnicodeStringTypes() {
return this.useUnicodeStringTypes;
}
}
private static class HANANClobTypeDescriptor extends NClobTypeDescriptor {
/** serial version uid. */
private static final long serialVersionUID = 5651116091681647859L;
final int maxLobPrefetchSize;
public HANANClobTypeDescriptor(int maxLobPrefetchSize) {
this.maxLobPrefetchSize = maxLobPrefetchSize;
}
@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 ) {
try ( Reader r = new CloseSuppressingReader( characterStream.asReader() ) ) {
st.setCharacterStream( index, r, characterStream.getLength() );
}
catch (IOException e) {
// can't happen => ignore
}
}
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 ) {
try ( Reader r = new CloseSuppressingReader( characterStream.asReader() ) ) {
st.setCharacterStream( name, r, characterStream.getLength() );
}
catch (IOException e) {
// can't happen => ignore
}
}
else {
st.setCharacterStream( name, characterStream.asReader(), characterStream.getLength() );
}
}
};
}
@Override
public ValueExtractor getExtractor(JavaTypeDescriptor javaTypeDescriptor) {
return new BasicExtractor( javaTypeDescriptor, this ) {
@Override
protected X doExtract(ResultSet rs, String name, WrapperOptions options) throws SQLException {
NClob rsNClob = rs.getNClob( name );
if ( rsNClob == null || rsNClob.length() < HANANClobTypeDescriptor.this.maxLobPrefetchSize ) {
return javaTypeDescriptor.wrap( rsNClob, options );
}
NClob nClob = new MaterializedNClob( DataHelper.extractString( rsNClob ) );
return javaTypeDescriptor.wrap( nClob, options );
}
@Override
protected X doExtract(CallableStatement statement, int index, WrapperOptions options) throws SQLException {
return javaTypeDescriptor.wrap( statement.getNClob( index ), options );
}
@Override
protected X doExtract(CallableStatement statement, String name, WrapperOptions options) throws SQLException {
return javaTypeDescriptor.wrap( statement.getNClob( name ), options );
}
};
}
public int getMaxLobPrefetchSize() {
return this.maxLobPrefetchSize;
}
}
public static class HANABlobTypeDescriptor implements SqlTypeDescriptor {
private static final long serialVersionUID = 5874441715643764323L;
final int maxLobPrefetchSize;
final HANAStreamBlobTypeDescriptor hanaStreamBlobTypeDescriptor;
public HANABlobTypeDescriptor(int maxLobPrefetchSize) {
this.maxLobPrefetchSize = maxLobPrefetchSize;
this.hanaStreamBlobTypeDescriptor = new HANAStreamBlobTypeDescriptor( maxLobPrefetchSize );
}
@Override
public int getSqlType() {
return Types.BLOB;
}
@Override
public boolean canBeRemapped() {
return true;
}
@Override
public ValueExtractor getExtractor(final JavaTypeDescriptor javaTypeDescriptor) {
return new BasicExtractor( javaTypeDescriptor, this ) {
@Override
protected X doExtract(ResultSet rs, String name, WrapperOptions options) throws SQLException {
Blob rsBlob = rs.getBlob( name );
if ( rsBlob == null || rsBlob.length() < HANABlobTypeDescriptor.this.maxLobPrefetchSize ) {
return javaTypeDescriptor.wrap( rsBlob, options );
}
Blob blob = new MaterializedBlob( DataHelper.extractBytes( rsBlob.getBinaryStream() ) );
return javaTypeDescriptor.wrap( blob, options );
}
@Override
protected X doExtract(CallableStatement statement, int index, WrapperOptions options) throws SQLException {
return javaTypeDescriptor.wrap( statement.getBlob( index ), options );
}
@Override
protected X doExtract(CallableStatement statement, String name, WrapperOptions options) throws SQLException {
return javaTypeDescriptor.wrap( statement.getBlob( name ), options );
}
};
}
@Override
public BasicBinder getBinder(final JavaTypeDescriptor javaTypeDescriptor) {
return new BasicBinder( javaTypeDescriptor, this ) {
@Override
protected void doBind(PreparedStatement st, X value, int index, WrapperOptions options) throws SQLException {
SqlTypeDescriptor descriptor = BlobTypeDescriptor.BLOB_BINDING;
if ( byte[].class.isInstance( value ) ) {
// performance shortcut for binding BLOB data in byte[] format
descriptor = BlobTypeDescriptor.PRIMITIVE_ARRAY_BINDING;
}
else if ( options.useStreamForLobBinding() ) {
descriptor = HANABlobTypeDescriptor.this.hanaStreamBlobTypeDescriptor;
}
descriptor.getBinder( javaTypeDescriptor ).bind( st, value, index, options );
}
@Override
protected void doBind(CallableStatement st, X value, String name, WrapperOptions options) throws SQLException {
SqlTypeDescriptor descriptor = BlobTypeDescriptor.BLOB_BINDING;
if ( byte[].class.isInstance( value ) ) {
// performance shortcut for binding BLOB data in byte[] format
descriptor = BlobTypeDescriptor.PRIMITIVE_ARRAY_BINDING;
}
else if ( options.useStreamForLobBinding() ) {
descriptor = HANABlobTypeDescriptor.this.hanaStreamBlobTypeDescriptor;
}
descriptor.getBinder( javaTypeDescriptor ).bind( st, value, name, options );
}
};
}
public int getMaxLobPrefetchSize() {
return this.maxLobPrefetchSize;
}
}
// Set the LOB prefetch size. LOBs larger than this value will be read into memory as the HANA JDBC driver closes
// the LOB when the result set is closed.
private static final String MAX_LOB_PREFETCH_SIZE_PARAMETER_NAME = new String( "hibernate.dialect.hana.max_lob_prefetch_size" );
// Use TINYINT instead of the native BOOLEAN type
private static final String USE_LEGACY_BOOLEAN_TYPE_PARAMETER_NAME = new String( "hibernate.dialect.hana.use_legacy_boolean_type" );
// Use unicode (NVARCHAR, NCLOB, etc.) instead of non-unicode (VARCHAR, CLOB) string types
private static final String USE_UNICODE_STRING_TYPES_PARAMETER_NAME = new String( "hibernate.dialect.hana.use_unicode_string_types" );
// Read and write double-typed fields as BigDecimal instead of Double to get around precision issues of the HANA
// JDBC driver (https://service.sap.com/sap/support/notes/2590160)
private static final String TREAT_DOUBLE_TYPED_FIELDS_AS_DECIMAL_PARAMETER_NAME = new String(
"hibernate.dialect.hana.treat_double_typed_fields_as_decimal" );
private static final int MAX_LOB_PREFETCH_SIZE_DEFAULT_VALUE = 1024;
private static final Boolean USE_LEGACY_BOOLEAN_TYPE_DEFAULT_VALUE = Boolean.FALSE;
private static final Boolean USE_UNICODE_STRING_TYPES_DEFAULT_VALUE = Boolean.FALSE;
private static final Boolean TREAT_DOUBLE_TYPED_FIELDS_AS_DECIMAL_DEFAULT_VALUE = Boolean.FALSE;
private HANANClobTypeDescriptor nClobTypeDescriptor = new HANANClobTypeDescriptor( MAX_LOB_PREFETCH_SIZE_DEFAULT_VALUE );
private HANABlobTypeDescriptor blobTypeDescriptor = new HANABlobTypeDescriptor( MAX_LOB_PREFETCH_SIZE_DEFAULT_VALUE );
private HANAClobTypeDescriptor clobTypeDescriptor = new HANAClobTypeDescriptor( MAX_LOB_PREFETCH_SIZE_DEFAULT_VALUE,
USE_UNICODE_STRING_TYPES_DEFAULT_VALUE.booleanValue() );
private boolean useLegacyBooleanType = USE_LEGACY_BOOLEAN_TYPE_DEFAULT_VALUE.booleanValue();
private boolean useUnicodeStringTypes = USE_UNICODE_STRING_TYPES_DEFAULT_VALUE.booleanValue();
private boolean treatDoubleTypedFieldsAsDecimal = TREAT_DOUBLE_TYPED_FIELDS_AS_DECIMAL_DEFAULT_VALUE.booleanValue();
/*
* Tables named "TYPE" need to be quoted
*/
private final StandardTableExporter hanaTableExporter = new StandardTableExporter( this ) {
@Override
public String[] getSqlCreateStrings(org.hibernate.mapping.Table table, org.hibernate.boot.Metadata metadata) {
String[] sqlCreateStrings = super.getSqlCreateStrings( table, metadata );
return quoteTypeIfNecessary( table, sqlCreateStrings, getCreateTableString() );
}
@Override
public String[] getSqlDropStrings(Table table, org.hibernate.boot.Metadata metadata) {
String[] sqlDropStrings = super.getSqlDropStrings( table, metadata );
return quoteTypeIfNecessary( table, sqlDropStrings, "drop table" );
}
private String[] quoteTypeIfNecessary(org.hibernate.mapping.Table table, String[] strings, String prefix) {
if ( table.getNameIdentifier() == null || table.getNameIdentifier().isQuoted()
|| !"type".equals( table.getNameIdentifier().getText().toLowerCase() ) ) {
return strings;
}
Pattern createTableTypePattern = Pattern.compile( "(" + prefix + "\\s+)(" + table.getNameIdentifier().getText() + ")(.+)" );
Pattern commentOnTableTypePattern = Pattern.compile( "(comment\\s+on\\s+table\\s+)(" + table.getNameIdentifier().getText() + ")(.+)" );
for ( int i = 0; i < strings.length; i++ ) {
Matcher createTableTypeMatcher = createTableTypePattern.matcher( strings[i] );
Matcher commentOnTableTypeMatcher = commentOnTableTypePattern.matcher( strings[i] );
if ( createTableTypeMatcher.matches() ) {
strings[i] = createTableTypeMatcher.group( 1 ) + "\"TYPE\"" + createTableTypeMatcher.group( 3 );
}
if ( commentOnTableTypeMatcher.matches() ) {
strings[i] = commentOnTableTypeMatcher.group( 1 ) + "\"TYPE\"" + commentOnTableTypeMatcher.group( 3 );
}
}
return strings;
}
};
public AbstractHANADialect() {
super();
registerColumnType( Types.DECIMAL, "decimal($p, $s)" );
registerColumnType( Types.NUMERIC, "decimal($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.NCHAR, "nvarchar(1)" );
registerColumnType( Types.VARCHAR, 5000, "varchar($l)" );
registerColumnType( Types.LONGVARCHAR, 5000, "varchar($l)" );
registerColumnType( Types.NVARCHAR, 5000, "nvarchar($l)" );
registerColumnType( Types.LONGNVARCHAR, 5000, "nvarchar($l)" );
// for longer values map to clob/nclob
registerColumnType( Types.LONGVARCHAR, "clob" );
registerColumnType( Types.VARCHAR, "clob" );
registerColumnType( Types.LONGNVARCHAR, "nclob" );
registerColumnType( Types.NVARCHAR, "nclob" );
registerColumnType( Types.CLOB, "clob" );
registerColumnType( Types.NCLOB, "nclob" );
registerColumnType( Types.BOOLEAN, "boolean" );
// map bit/tinyint to smallint since tinyint is unsigned on HANA
registerColumnType( Types.BIT, "smallint" );
registerColumnType( Types.TINYINT, "smallint" );
registerHibernateType( Types.NCLOB, StandardBasicTypes.MATERIALIZED_NCLOB.getName() );
registerHibernateType( Types.CLOB, StandardBasicTypes.MATERIALIZED_CLOB.getName() );
registerHibernateType( Types.BLOB, StandardBasicTypes.MATERIALIZED_BLOB.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.INTEGER ) );
registerFunction( "locate", new SQLFunctionTemplate( StandardBasicTypes.INTEGER, "locate(?2, ?1, ?3)" ) );
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" );
// getGeneratedKeys() is not supported by the HANA JDBC driver
getDefaultProperties().setProperty( AvailableSettings.USE_GET_GENERATED_KEYS, "false" );
}
@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
protected String getCreateSequenceString(String sequenceName, int initialValue, int incrementSize) throws MappingException {
if ( incrementSize == 0 ) {
throw new MappingException( "Unable to create the sequence [" + sequenceName + "]: the increment size must not be 0" );
}
String createSequenceString = getCreateSequenceString( sequenceName ) + " start with " + initialValue + " increment by " + incrementSize;
if ( incrementSize > 0 ) {
if ( initialValue < 1 ) {
// default minvalue for an ascending sequence is 1
createSequenceString += " minvalue " + initialValue;
}
}
else if ( incrementSize < 0 ) {
if ( initialValue > -1 ) {
// default maxvalue for a descending sequence is -1
createSequenceString += " maxvalue " + initialValue;
}
}
return createSequenceString;
}
@Override
public String getCurrentTimestampSelectString() {
return "select current_timestamp from sys.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.findGreatestLockMode();
lockOptions.setLockMode( lockMode );
// not sure why this is sometimes empty
if ( aliases == null || aliases.isEmpty() ) {
return getForUpdateString( lockOptions );
}
return getForUpdateString( aliases, lockMode, lockOptions.getTimeOut() );
}
@SuppressWarnings({ "deprecation" })
private String getForUpdateString(String aliases, LockMode lockMode, int timeout) {
switch ( lockMode ) {
case UPGRADE:
return getForUpdateString( aliases );
case PESSIMISTIC_READ:
return getReadLockString( aliases, timeout );
case PESSIMISTIC_WRITE:
return getWriteLockString( aliases, timeout );
case UPGRADE_NOWAIT:
case FORCE:
case PESSIMISTIC_FORCE_INCREMENT:
return getForUpdateNowaitString( aliases );
case UPGRADE_SKIPLOCKED:
return getForUpdateSkipLockedString( aliases );
default:
return "";
}
}
@Override
public String getForUpdateNowaitString() {
return getForUpdateString() + " nowait";
}
@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 * from sys.sequences";
}
@Override
public SequenceInformationExtractor getSequenceInformationExtractor() {
return SequenceInformationExtractorHANADatabaseImpl.INSTANCE;
}
@Override
public String getSelectSequenceNextValString(final String sequenceName) {
return sequenceName + ".nextval";
}
@Override
public String getSequenceNextValString(final String sequenceName) {
return "select " + getSelectSequenceNextValString( sequenceName ) + " from sys.dummy";
}
@Override
protected SqlTypeDescriptor getSqlTypeDescriptorOverride(final int sqlCode) {
switch ( sqlCode ) {
case Types.CLOB:
return this.clobTypeDescriptor;
case Types.NCLOB:
return this.nClobTypeDescriptor;
case Types.BLOB:
return this.blobTypeDescriptor;
case Types.TINYINT:
// tinyint is unsigned on HANA
return SmallIntTypeDescriptor.INSTANCE;
case Types.BOOLEAN:
return this.useLegacyBooleanType ? BitTypeDescriptor.INSTANCE : BooleanTypeDescriptor.INSTANCE;
case Types.VARCHAR:
return this.useUnicodeStringTypes ? NVarcharTypeDescriptor.INSTANCE : VarcharTypeDescriptor.INSTANCE;
case Types.CHAR:
return this.useUnicodeStringTypes ? NCharTypeDescriptor.INSTANCE : CharTypeDescriptor.INSTANCE;
case Types.DOUBLE:
return this.treatDoubleTypedFieldsAsDecimal ? DecimalTypeDescriptor.INSTANCE : DoubleTypeDescriptor.INSTANCE;
default:
return super.getSqlTypeDescriptorOverride( sqlCode );
}
}
@Override
public boolean isCurrentTimestampSelectStringCallable() {
return false;
}
protected void registerHanaKeywords() {
registerKeyword( "all" );
registerKeyword( "alter" );
registerKeyword( "as" );
registerKeyword( "before" );
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_transaction_isolation_level" );
registerKeyword( "current_user" );
registerKeyword( "current_utcdate" );
registerKeyword( "current_utctime" );
registerKeyword( "current_utctimestamp" );
registerKeyword( "currval" );
registerKeyword( "cursor" );
registerKeyword( "declare" );
registerKeyword( "deferred" );
registerKeyword( "distinct" );
registerKeyword( "else" );
registerKeyword( "elseif" );
registerKeyword( "end" );
registerKeyword( "except" );
registerKeyword( "exception" );
registerKeyword( "exec" );
registerKeyword( "false" );
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( "nchar" );
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( "session_user" );
registerKeyword( "set" );
registerKeyword( "sql" );
registerKeyword( "start" );
registerKeyword( "sysuuid" );
registerKeyword( "tablesample" );
registerKeyword( "top" );
registerKeyword( "trailing" );
registerKeyword( "true" );
registerKeyword( "union" );
registerKeyword( "unknown" );
registerKeyword( "using" );
registerKeyword( "utctimestamp" );
registerKeyword( "values" );
registerKeyword( "when" );
registerKeyword( "where" );
registerKeyword( "while" );
registerKeyword( "with" );
}
@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 supportsUnboundedLobLocatorMaterialization() {
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 true;
}
@Override
public boolean supportsTupleDistinctCounts() {
return true;
}
@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;
}
@Override
public LimitHandler getLimitHandler() {
return LIMIT_HANDLER;
}
@Override
public String getSelectGUIDString() {
return "select sysuuid from sys.dummy";
}
@Override
public NameQualifierSupport getNameQualifierSupport() {
return NameQualifierSupport.SCHEMA;
}
@SuppressWarnings("deprecation")
@Override
public IdentifierHelper buildIdentifierHelper(IdentifierHelperBuilder builder, DatabaseMetaData dbMetaData)
throws SQLException {
/*
* Copied from Dialect
*/
builder.applyIdentifierCasing( dbMetaData );
builder.applyReservedWords( dbMetaData );
builder.applyReservedWords( AnsiSqlKeywords.INSTANCE.sql2003() );
builder.applyReservedWords( getKeywords() );
builder.setNameQualifierSupport( getNameQualifierSupport() );
/*
* HANA-specific extensions
*/
builder.setQuotedCaseStrategy( IdentifierCaseStrategy.MIXED );
builder.setUnquotedCaseStrategy( IdentifierCaseStrategy.UPPER );
final IdentifierHelper identifierHelper = builder.build();
return new IdentifierHelper() {
private final IdentifierHelper helper = identifierHelper;
@Override
public String toMetaDataSchemaName(Identifier schemaIdentifier) {
return this.helper.toMetaDataSchemaName( schemaIdentifier );
}
@Override
public String toMetaDataObjectName(Identifier identifier) {
return this.helper.toMetaDataObjectName( identifier );
}
@Override
public String toMetaDataCatalogName(Identifier catalogIdentifier) {
return this.helper.toMetaDataCatalogName( catalogIdentifier );
}
@Override
public Identifier toIdentifier(String text) {
return normalizeQuoting( Identifier.toIdentifier( text ) );
}
@Override
public Identifier toIdentifier(String text, boolean quoted) {
return normalizeQuoting( Identifier.toIdentifier( text, quoted ) );
}
@Override
public Identifier normalizeQuoting(Identifier identifier) {
Identifier normalizedIdentifier = this.helper.normalizeQuoting( identifier );
if ( normalizedIdentifier == null ) {
return null;
}
// need to quote names containing special characters like ':'
if ( !normalizedIdentifier.isQuoted() && !normalizedIdentifier.getText().matches( "\\w+" ) ) {
normalizedIdentifier = Identifier.quote( normalizedIdentifier );
}
return normalizedIdentifier;
}
@Override
public boolean isReservedWord(String word) {
return this.helper.isReservedWord( word );
}
@Override
public Identifier applyGlobalQuoting(String text) {
return this.helper.applyGlobalQuoting( text );
}
};
}
@Override
public String getCurrentSchemaCommand() {
return "select current_schema from sys.dummy";
}
@Override
public String getForUpdateNowaitString(String aliases) {
return getForUpdateString( aliases ) + " nowait";
}
@Override
public String getReadLockString(int timeout) {
return getWriteLockString( timeout );
}
@Override
public String getReadLockString(String aliases, int timeout) {
return getWriteLockString( aliases, timeout );
}
@Override
public String getWriteLockString(int timeout) {
if ( timeout > 0 ) {
return getForUpdateString() + " wait " + timeout;
}
else if ( timeout == 0 ) {
return getForUpdateNowaitString();
}
else {
return getForUpdateString();
}
}
@Override
public String getWriteLockString(String aliases, int timeout) {
if ( timeout > 0 ) {
return getForUpdateString( aliases ) + " wait " + timeout;
}
else if ( timeout == 0 ) {
return getForUpdateNowaitString( aliases );
}
else {
return getForUpdateString( aliases );
}
}
@Override
public String getQueryHintString(String query, List hints) {
return query + " with hint (" + String.join( ",", hints ) + ")";
}
@Override
public String getTableComment(String comment) {
return "comment '" + comment + "'";
}
@Override
public String getColumnComment(String comment) {
return "comment '" + comment + "'";
}
@Override
public boolean supportsCommentOn() {
return true;
}
@Override
public boolean supportsPartitionBy() {
return true;
}
@Override
public void contributeTypes(TypeContributions typeContributions, ServiceRegistry serviceRegistry) {
super.contributeTypes( typeContributions, serviceRegistry );
final ConnectionProvider connectionProvider = serviceRegistry.getService( ConnectionProvider.class );
int maxLobPrefetchSizeDefault = MAX_LOB_PREFETCH_SIZE_DEFAULT_VALUE;
if ( connectionProvider != null ) {
Connection conn = null;
try {
conn = connectionProvider.getConnection();
try ( Statement statement = conn.createStatement() ) {
try ( ResultSet rs = statement.executeQuery(
"SELECT TOP 1 VALUE, MAP(LAYER_NAME, 'DEFAULT', 1, 'SYSTEM', 2, 'DATABASE', 3, 4) AS LAYER FROM SYS.M_INIFILE_CONTENTS WHERE FILE_NAME='indexserver.ini' AND SECTION='session' AND KEY='max_lob_prefetch_size' ORDER BY LAYER DESC" ) ) {
// This only works if the current user has the privilege INIFILE ADMIN
if ( rs.next() ) {
maxLobPrefetchSizeDefault = rs.getInt( 1 );
}
}
}
}
catch (Exception e) {
LOG.debug(
"An error occurred while trying to determine the value of the HANA parameter indexserver.ini / session / max_lob_prefetch_size. Using the default value "
+ maxLobPrefetchSizeDefault,
e );
}
finally {
if ( conn != null ) {
try {
connectionProvider.closeConnection( conn );
}
catch (SQLException e) {
// ignore
}
}
}
}
final ConfigurationService configurationService = serviceRegistry.getService( ConfigurationService.class );
int maxLobPrefetchSize = configurationService.getSetting(
MAX_LOB_PREFETCH_SIZE_PARAMETER_NAME,
new Converter() {
@Override
public Integer convert(Object value) {
return Integer.valueOf( value.toString() );
}
},
Integer.valueOf( maxLobPrefetchSizeDefault ) ).intValue();
if ( this.nClobTypeDescriptor.getMaxLobPrefetchSize() != maxLobPrefetchSize ) {
this.nClobTypeDescriptor = new HANANClobTypeDescriptor( maxLobPrefetchSize );
}
if ( this.blobTypeDescriptor.getMaxLobPrefetchSize() != maxLobPrefetchSize ) {
this.blobTypeDescriptor = new HANABlobTypeDescriptor( maxLobPrefetchSize );
}
this.useUnicodeStringTypes = configurationService.getSetting( USE_UNICODE_STRING_TYPES_PARAMETER_NAME, StandardConverters.BOOLEAN,
USE_UNICODE_STRING_TYPES_DEFAULT_VALUE ).booleanValue();
if ( this.useUnicodeStringTypes ) {
registerColumnType( Types.CHAR, "nvarchar(1)" );
registerColumnType( Types.VARCHAR, 5000, "nvarchar($l)" );
registerColumnType( Types.LONGVARCHAR, 5000, "nvarchar($l)" );
// for longer values map to clob/nclob
registerColumnType( Types.LONGVARCHAR, "nclob" );
registerColumnType( Types.VARCHAR, "nclob" );
registerColumnType( Types.CLOB, "nclob" );
}
if ( this.clobTypeDescriptor.getMaxLobPrefetchSize() != maxLobPrefetchSize
|| this.clobTypeDescriptor.isUseUnicodeStringTypes() != this.useUnicodeStringTypes ) {
this.clobTypeDescriptor = new HANAClobTypeDescriptor( maxLobPrefetchSize, this.useUnicodeStringTypes );
}
this.useLegacyBooleanType = configurationService.getSetting( USE_LEGACY_BOOLEAN_TYPE_PARAMETER_NAME, StandardConverters.BOOLEAN,
USE_LEGACY_BOOLEAN_TYPE_DEFAULT_VALUE ).booleanValue();
if ( this.useLegacyBooleanType ) {
registerColumnType( Types.BOOLEAN, "tinyint" );
}
this.treatDoubleTypedFieldsAsDecimal = configurationService.getSetting( TREAT_DOUBLE_TYPED_FIELDS_AS_DECIMAL_PARAMETER_NAME, StandardConverters.BOOLEAN,
TREAT_DOUBLE_TYPED_FIELDS_AS_DECIMAL_DEFAULT_VALUE ).booleanValue();
if ( this.treatDoubleTypedFieldsAsDecimal ) {
registerHibernateType( Types.DOUBLE, StandardBasicTypes.BIG_DECIMAL.getName() );
}
}
public SqlTypeDescriptor getBlobTypeDescriptor() {
return this.blobTypeDescriptor;
}
@Override
public String toBooleanValueString(boolean bool) {
if ( this.useLegacyBooleanType ) {
return bool ? "1" : "0";
}
return bool ? "true" : "false";
}
@Override
public IdentityColumnSupport getIdentityColumnSupport() {
return new HANAIdentityColumnSupport();
}
@Override
public Exporter getTableExporter() {
return this.hanaTableExporter;
}
/*
* HANA doesn't really support REF_CURSOR returns from a procedure, but REF_CURSOR support can be emulated by using
* procedures or functions with an OUT parameter of type TABLE. The results will be returned as result sets on the
* callable statement.
*/
@Override
public CallableStatementSupport getCallableStatementSupport() {
return StandardCallableStatementSupport.REF_CURSOR_INSTANCE;
}
@Override
public int registerResultSetOutParameter(CallableStatement statement, int position) throws SQLException {
// Result set (TABLE) OUT parameters don't need to be registered
return position;
}
@Override
public int registerResultSetOutParameter(CallableStatement statement, String name) throws SQLException {
// Result set (TABLE) OUT parameters don't need to be registered
return 0;
}
@Override
public boolean supportsNoWait() {
return true;
}
@Override
public boolean supportsJdbcConnectionLobCreation(DatabaseMetaData databaseMetaData) {
return false;
}
public boolean supportsNoColumnsInsert() {
return false;
}
}
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