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HHH-13917: Add support for HANA Cloud
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hibernate-core/src/main/java/org/hibernate/dialect/HANACloudColumnStoreDialect.java
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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 <http://www.gnu.org/licenses/lgpl-2.1.html>. | ||
| */ | ||
| package org.hibernate.dialect; | ||
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| import java.sql.Types; | ||
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| import org.hibernate.dialect.function.SQLFunctionTemplate; | ||
| import org.hibernate.dialect.function.StandardSQLFunction; | ||
| import org.hibernate.dialect.function.VarArgsSQLFunction; | ||
| 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.type.StandardBasicTypes; | ||
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| /** | ||
| * An SQL dialect for the SAP HANA Cloud column store. | ||
| * <p> | ||
| * For more information on interacting with the SAP HANA Cloud database, refer to the | ||
| * <a href="https://help.sap.com/viewer/c1d3f60099654ecfb3fe36ac93c121bb/cloud/">SAP HANA Cloud SQL Reference Guide</a> | ||
| * and the <a href= | ||
| * "https://help.sap.com/viewer/0eec0d68141541d1b07893a39944924e/latest/en-US/434e2962074540e18c802fd478de86d6.html">SAP | ||
| * HANA Client Interface Programming Reference</a>. | ||
| * <p> | ||
| * Column tables are created by this dialect when using the auto-ddl feature. | ||
| * | ||
| * @author <a href="mailto:jonathan.bregler@sap.com">Jonathan Bregler</a> | ||
| */ | ||
| public class HANACloudColumnStoreDialect extends AbstractHANADialect { | ||
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| public HANACloudColumnStoreDialect() { | ||
| super(); | ||
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| registerColumnType( Types.CHAR, "nvarchar(1)" ); | ||
| registerColumnType( Types.VARCHAR, 5000, "nvarchar($l)" ); | ||
| registerColumnType( Types.LONGVARCHAR, 5000, "nvarchar($l)" ); | ||
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| // for longer values map to clob/nclob | ||
| registerColumnType( Types.LONGVARCHAR, "nclob" ); | ||
| registerColumnType( Types.VARCHAR, "nclob" ); | ||
| registerColumnType( Types.CLOB, "nclob" ); | ||
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| registerHibernateType( Types.CLOB, StandardBasicTypes.MATERIALIZED_NCLOB.getName() ); | ||
| registerHibernateType( Types.NCHAR, StandardBasicTypes.NSTRING.getName() ); | ||
| registerHibernateType( Types.CHAR, StandardBasicTypes.CHARACTER.getName() ); | ||
| registerHibernateType( Types.CHAR, 1, StandardBasicTypes.CHARACTER.getName() ); | ||
| registerHibernateType( Types.CHAR, 5000, StandardBasicTypes.NSTRING.getName() ); | ||
| registerHibernateType( Types.VARCHAR, StandardBasicTypes.NSTRING.getName() ); | ||
| registerHibernateType( Types.LONGVARCHAR, StandardBasicTypes.NTEXT.getName() ); | ||
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| // register additional keywords | ||
| registerHanaCloudKeywords(); | ||
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| // full-text search functions | ||
| registerFunction( "score", new StandardSQLFunction( "score", StandardBasicTypes.DOUBLE ) ); | ||
| registerFunction( "contains", new VarArgsSQLFunction( StandardBasicTypes.BOOLEAN, "contains(", ",", ") /*" ) ); | ||
| registerFunction( "contains_rhs", new SQLFunctionTemplate( StandardBasicTypes.BOOLEAN, "*/" ) ); | ||
| registerFunction( "not_contains", new VarArgsSQLFunction( StandardBasicTypes.BOOLEAN, "not contains(", ",", ") /*" ) ); | ||
| } | ||
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| private void registerHanaCloudKeywords() { | ||
| registerKeyword( "array" ); | ||
| registerKeyword( "at" ); | ||
| registerKeyword( "authorization" ); | ||
| registerKeyword( "between" ); | ||
| registerKeyword( "by" ); | ||
| registerKeyword( "collate" ); | ||
| registerKeyword( "empty" ); | ||
| registerKeyword( "filter" ); | ||
| registerKeyword( "grouping" ); | ||
| registerKeyword( "no" ); | ||
| registerKeyword( "not" ); | ||
| registerKeyword( "of" ); | ||
| registerKeyword( "over" ); | ||
| registerKeyword( "recursive" ); | ||
| registerKeyword( "row" ); | ||
| registerKeyword( "table" ); | ||
| registerKeyword( "to" ); | ||
| registerKeyword( "window" ); | ||
| registerKeyword( "within" ); | ||
| } | ||
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| @Override | ||
| public String getCreateTableString() { | ||
| return "create column table"; | ||
| } | ||
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| @Override | ||
| public MultiTableBulkIdStrategy getDefaultMultiTableBulkIdStrategy() { | ||
| return new GlobalTemporaryTableBulkIdStrategy( new IdTableSupportStandardImpl() { | ||
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| @Override | ||
| public String getCreateIdTableCommand() { | ||
| return "create global temporary column table"; | ||
| } | ||
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| @Override | ||
| public String getTruncateIdTableCommand() { | ||
| return "truncate table"; | ||
| } | ||
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| }, AfterUseAction.CLEAN ); | ||
| } | ||
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| @Override | ||
| protected boolean supportsAsciiStringTypes() { | ||
| return false; | ||
| } | ||
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| @Override | ||
| protected Boolean useUnicodeStringTypesDefault() { | ||
| return Boolean.TRUE; | ||
| } | ||
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| @Override | ||
| public boolean isUseUnicodeStringTypes() { | ||
| return true; | ||
| } | ||
| } |
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