HHH-18798 Add JSON aggregate support for SQL Server
This commit is contained in:
Christian Beikov
parent
d973dcc060
commit
4a07b5ed1d
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@ -19,6 +19,8 @@ import org.hibernate.dialect.Replacer;
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import org.hibernate.dialect.SQLServerCastingXmlArrayJdbcTypeConstructor;
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import org.hibernate.dialect.SQLServerCastingXmlJdbcType;
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import org.hibernate.dialect.TimeZoneSupport;
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import org.hibernate.dialect.aggregate.AggregateSupport;
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import org.hibernate.dialect.aggregate.SQLServerAggregateSupport;
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import org.hibernate.dialect.function.CommonFunctionFactory;
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import org.hibernate.dialect.function.CountFunction;
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import org.hibernate.dialect.function.SQLServerFormatEmulation;
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@ -504,6 +506,11 @@ public class SQLServerLegacyDialect extends AbstractTransactSQLDialect {
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};
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}
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@Override
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public AggregateSupport getAggregateSupport() {
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return SQLServerAggregateSupport.valueOf( this );
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}
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@Override
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public SizeStrategy getSizeStrategy() {
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return sizeStrategy;
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@ -25,6 +25,8 @@ import org.hibernate.boot.model.TypeContributions;
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import org.hibernate.boot.model.relational.QualifiedSequenceName;
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import org.hibernate.boot.model.relational.Sequence;
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import org.hibernate.boot.model.relational.SqlStringGenerationContext;
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import org.hibernate.dialect.aggregate.AggregateSupport;
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import org.hibernate.dialect.aggregate.SQLServerAggregateSupport;
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import org.hibernate.dialect.function.CommonFunctionFactory;
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import org.hibernate.dialect.function.CountFunction;
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import org.hibernate.dialect.function.SQLServerFormatEmulation;
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@ -511,6 +513,11 @@ public class SQLServerDialect extends AbstractTransactSQLDialect {
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};
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}
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@Override
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public AggregateSupport getAggregateSupport() {
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return SQLServerAggregateSupport.valueOf( this );
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}
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@Override
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public SizeStrategy getSizeStrategy() {
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return sizeStrategy;
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@ -0,0 +1,401 @@
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/*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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* Copyright Red Hat Inc. and Hibernate Authors
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*/
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package org.hibernate.dialect.aggregate;
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import org.hibernate.dialect.Dialect;
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import org.hibernate.engine.jdbc.Size;
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import org.hibernate.internal.util.StringHelper;
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import org.hibernate.mapping.Column;
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import org.hibernate.metamodel.mapping.EmbeddableMappingType;
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import org.hibernate.metamodel.mapping.JdbcMapping;
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import org.hibernate.metamodel.mapping.SelectableMapping;
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import org.hibernate.metamodel.mapping.SelectablePath;
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import org.hibernate.metamodel.mapping.SqlTypedMapping;
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import org.hibernate.sql.ast.SqlAstNodeRenderingMode;
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import org.hibernate.sql.ast.SqlAstTranslator;
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import org.hibernate.sql.ast.spi.SqlAppender;
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import org.hibernate.type.BasicPluralType;
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import org.hibernate.type.BasicType;
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import org.hibernate.type.SqlTypes;
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import org.hibernate.type.descriptor.jdbc.AggregateJdbcType;
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import org.hibernate.type.descriptor.sql.DdlType;
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import org.hibernate.type.descriptor.sql.spi.DdlTypeRegistry;
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import org.hibernate.type.spi.TypeConfiguration;
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import java.util.LinkedHashMap;
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import java.util.Map;
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import static org.hibernate.type.SqlTypes.*;
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public class SQLServerAggregateSupport extends AggregateSupportImpl {
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private static final AggregateSupport INSTANCE = new SQLServerAggregateSupport();
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private static final String JSON_QUERY_START = "json_query(";
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private static final String JSON_QUERY_JSON_END = "')";
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private static final int JSON_VALUE_MAX_LENGTH = 4000;
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private SQLServerAggregateSupport() {
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}
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public static AggregateSupport valueOf(Dialect dialect) {
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return dialect.getVersion().isSameOrAfter( 13 )
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? SQLServerAggregateSupport.INSTANCE
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: AggregateSupportImpl.INSTANCE;
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}
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@Override
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public String aggregateComponentCustomReadExpression(
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String template,
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String placeholder,
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String aggregateParentReadExpression,
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String columnExpression,
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int aggregateColumnTypeCode,
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SqlTypedMapping column) {
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switch ( aggregateColumnTypeCode ) {
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case JSON:
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case JSON_ARRAY:
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final String parentPartExpression;
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if ( aggregateParentReadExpression.startsWith( JSON_QUERY_START )
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&& aggregateParentReadExpression.endsWith( JSON_QUERY_JSON_END ) ) {
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parentPartExpression = aggregateParentReadExpression.substring( JSON_QUERY_START.length(), aggregateParentReadExpression.length() - JSON_QUERY_JSON_END.length() ) + ".";
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}
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else {
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parentPartExpression = aggregateParentReadExpression + ",'$.";
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}
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switch ( column.getJdbcMapping().getJdbcType().getDefaultSqlTypeCode() ) {
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case JSON:
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case JSON_ARRAY:
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return template.replace(
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placeholder,
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"json_query(" + parentPartExpression + columnExpression + "')"
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);
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case BINARY:
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case VARBINARY:
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case LONG32VARBINARY:
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case BLOB:
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// We encode binary data as hex, so we have to decode here
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if ( determineLength( column ) * 2 > JSON_VALUE_MAX_LENGTH ) {
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// Since data is HEX encoded, multiply the max length by 2 since we need 2 hex chars per byte
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return template.replace(
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placeholder,
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"(select convert(" + column.getColumnDefinition() + ",v,2) from openjson(" + aggregateParentReadExpression + ") with (v varchar(max) '$." + columnExpression + "'))"
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);
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}
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else {
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return template.replace(
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placeholder,
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"convert(" + column.getColumnDefinition() + ",json_value(" + parentPartExpression + columnExpression + "'),2)"
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);
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}
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case CHAR:
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case NCHAR:
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case VARCHAR:
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case NVARCHAR:
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case LONG32VARCHAR:
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case LONG32NVARCHAR:
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case CLOB:
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case NCLOB:
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if ( determineLength( column ) > JSON_VALUE_MAX_LENGTH ) {
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return template.replace(
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placeholder,
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"(select * from openjson(" + aggregateParentReadExpression + ") with (v " + column.getColumnDefinition() + " '$." + columnExpression + "'))"
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);
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}
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// Fall-through intended
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case BIT:
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case TINYINT:
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case SMALLINT:
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case INTEGER:
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case BIGINT:
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case REAL:
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case FLOAT:
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case DOUBLE:
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case NUMERIC:
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case DECIMAL:
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case TIME:
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case TIME_UTC:
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case TIME_WITH_TIMEZONE:
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case DATE:
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case TIMESTAMP:
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case TIMESTAMP_UTC:
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case TIMESTAMP_WITH_TIMEZONE:
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return template.replace(
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placeholder,
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"cast(json_value(" + parentPartExpression + columnExpression + "') as " + column.getColumnDefinition() + ")"
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);
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default:
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return template.replace(
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placeholder,
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"(select * from openjson(" + aggregateParentReadExpression + ") with (v " + column.getColumnDefinition() + " '$." + columnExpression + "'))"
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);
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}
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}
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throw new IllegalArgumentException( "Unsupported aggregate SQL type: " + aggregateColumnTypeCode );
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}
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private static Long determineLength(SqlTypedMapping column) {
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final Long length = column.getLength();
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if ( length != null ) {
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return length;
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}
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else {
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final String columnDefinition = column.getColumnDefinition();
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assert columnDefinition != null;
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final int parenthesisIndex = columnDefinition.indexOf( '(' );
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if ( parenthesisIndex != -1 ) {
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int end;
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for ( end = parenthesisIndex + 1; end < columnDefinition.length(); end++ ) {
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if ( !Character.isDigit( columnDefinition.charAt( end ) ) ) {
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break;
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}
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}
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return Long.parseLong( columnDefinition.substring( parenthesisIndex + 1, end ) );
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}
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// Default to the max varchar length
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return 8000L;
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}
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}
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@Override
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public String aggregateComponentAssignmentExpression(
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String aggregateParentAssignmentExpression,
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String columnExpression,
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int aggregateColumnTypeCode,
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Column column) {
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switch ( aggregateColumnTypeCode ) {
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case JSON:
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case JSON_ARRAY:
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// For JSON we always have to replace the whole object
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return aggregateParentAssignmentExpression;
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}
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throw new IllegalArgumentException( "Unsupported aggregate SQL type: " + aggregateColumnTypeCode );
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}
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private String jsonCustomWriteExpression(
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String customWriteExpression,
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JdbcMapping jdbcMapping,
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SelectableMapping column,
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TypeConfiguration typeConfiguration) {
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switch ( jdbcMapping.getJdbcType().getDefaultSqlTypeCode() ) {
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case BINARY:
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case VARBINARY:
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case LONG32VARBINARY:
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case BLOB:
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return "convert(nvarchar(max)," + customWriteExpression + ",2)";
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case TIME:
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return "left(" + customWriteExpression + ",8)";
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case DATE:
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return "format(" + customWriteExpression + ",'yyyy-MM-dd')";
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case TIMESTAMP:
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return "format(" + customWriteExpression + ",'yyyy-MM-ddTHH:mm:ss.fffffff')";
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case TIMESTAMP_UTC:
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case TIMESTAMP_WITH_TIMEZONE:
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return "format(" + customWriteExpression + ",'yyyy-MM-ddTHH:mm:ss.fffffffzzz')";
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case UUID:
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return "cast(" + customWriteExpression + " as nvarchar(36))";
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case JSON:
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case JSON_ARRAY:
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return "json_query(" + customWriteExpression + ")";
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default:
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return customWriteExpression;
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}
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}
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private static String determineElementTypeName(
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Size castTargetSize,
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BasicPluralType<?, ?> pluralType,
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TypeConfiguration typeConfiguration) {
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final DdlTypeRegistry ddlTypeRegistry = typeConfiguration.getDdlTypeRegistry();
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final BasicType<?> expressionType = pluralType.getElementType();
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DdlType ddlType = ddlTypeRegistry.getDescriptor( expressionType.getJdbcType().getDdlTypeCode() );
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if ( ddlType == null ) {
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// this may happen when selecting a null value like `SELECT null from ...`
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// some dbs need the value to be cast so not knowing the real type we fall back to INTEGER
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ddlType = ddlTypeRegistry.getDescriptor( SqlTypes.INTEGER );
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}
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return ddlType.getTypeName( castTargetSize, expressionType, ddlTypeRegistry );
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}
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@Override
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public boolean requiresAggregateCustomWriteExpressionRenderer(int aggregateSqlTypeCode) {
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return aggregateSqlTypeCode == JSON;
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}
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@Override
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public WriteExpressionRenderer aggregateCustomWriteExpressionRenderer(
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SelectableMapping aggregateColumn,
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SelectableMapping[] columnsToUpdate,
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TypeConfiguration typeConfiguration) {
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final int aggregateSqlTypeCode = aggregateColumn.getJdbcMapping().getJdbcType().getDefaultSqlTypeCode();
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switch ( aggregateSqlTypeCode ) {
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case JSON:
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return jsonAggregateColumnWriter( aggregateColumn, columnsToUpdate, typeConfiguration );
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}
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throw new IllegalArgumentException( "Unsupported aggregate SQL type: " + aggregateSqlTypeCode );
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}
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private WriteExpressionRenderer jsonAggregateColumnWriter(
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SelectableMapping aggregateColumn,
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SelectableMapping[] columns,
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TypeConfiguration typeConfiguration) {
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return new RootJsonWriteExpression( aggregateColumn, columns, this, typeConfiguration );
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}
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interface JsonWriteExpression {
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void append(
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SqlAppender sb,
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String path,
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SqlAstTranslator<?> translator,
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AggregateColumnWriteExpression expression);
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}
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private static class AggregateJsonWriteExpression implements JsonWriteExpression {
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private final LinkedHashMap<String, JsonWriteExpression> subExpressions = new LinkedHashMap<>();
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protected final EmbeddableMappingType embeddableMappingType;
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public AggregateJsonWriteExpression(SelectableMapping selectableMapping, SQLServerAggregateSupport aggregateSupport) {
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this.embeddableMappingType = ( (AggregateJdbcType) selectableMapping.getJdbcMapping().getJdbcType() )
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.getEmbeddableMappingType();
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}
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protected void initializeSubExpressions(
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SelectableMapping[] columns,
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SQLServerAggregateSupport aggregateSupport,
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TypeConfiguration typeConfiguration) {
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for ( SelectableMapping column : columns ) {
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final SelectablePath selectablePath = column.getSelectablePath();
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final SelectablePath[] parts = selectablePath.getParts();
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AggregateJsonWriteExpression currentAggregate = this;
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EmbeddableMappingType currentMappingType = embeddableMappingType;
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for ( int i = 1; i < parts.length - 1; i++ ) {
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final SelectableMapping selectableMapping = currentMappingType.getJdbcValueSelectable(
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currentMappingType.getSelectableIndex( parts[i].getSelectableName() )
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);
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currentAggregate = (AggregateJsonWriteExpression) currentAggregate.subExpressions.computeIfAbsent(
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parts[i].getSelectableName(),
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k -> new AggregateJsonWriteExpression( selectableMapping, aggregateSupport )
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);
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currentMappingType = currentAggregate.embeddableMappingType;
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}
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final String customWriteExpression = column.getWriteExpression();
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currentAggregate.subExpressions.put(
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parts[parts.length - 1].getSelectableName(),
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new BasicJsonWriteExpression(
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column,
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aggregateSupport.jsonCustomWriteExpression(
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customWriteExpression,
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column.getJdbcMapping(),
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column,
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typeConfiguration
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)
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)
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);
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}
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}
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@Override
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public void append(
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SqlAppender sb,
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String path,
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SqlAstTranslator<?> translator,
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AggregateColumnWriteExpression expression) {
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for ( int i = 0; i < subExpressions.size() - 1; i++ ) {
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sb.append( "json_modify(" );
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}
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sb.append( "json_modify(" );
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sb.append( path );
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for ( Map.Entry<String, JsonWriteExpression> entry : subExpressions.entrySet() ) {
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final String column = entry.getKey();
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final JsonWriteExpression value = entry.getValue();
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final String subPath = "json_query(" + path + ",'$." + column + "')";
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sb.append( ",'$." );
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sb.append( column );
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sb.append( "'," );
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if ( value instanceof AggregateJsonWriteExpression ) {
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value.append( sb, subPath, translator, expression );
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}
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else {
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value.append( sb, subPath, translator, expression );
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}
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sb.append( ')' );
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}
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}
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}
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private static class RootJsonWriteExpression extends AggregateJsonWriteExpression
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implements WriteExpressionRenderer {
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private final boolean nullable;
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private final String path;
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RootJsonWriteExpression(
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SelectableMapping aggregateColumn,
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SelectableMapping[] columns,
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SQLServerAggregateSupport aggregateSupport,
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TypeConfiguration typeConfiguration) {
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super( aggregateColumn, aggregateSupport );
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this.nullable = aggregateColumn.isNullable();
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this.path = aggregateColumn.getSelectionExpression();
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initializeSubExpressions( columns, aggregateSupport, typeConfiguration );
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}
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@Override
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public void render(
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SqlAppender sqlAppender,
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SqlAstTranslator<?> translator,
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AggregateColumnWriteExpression aggregateColumnWriteExpression,
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String qualifier) {
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final String basePath;
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if ( qualifier == null || qualifier.isBlank() ) {
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basePath = path;
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}
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else {
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basePath = qualifier + "." + path;
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}
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append(
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sqlAppender,
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nullable ? "coalesce(" + basePath + ",'{}')" : basePath,
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translator,
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aggregateColumnWriteExpression
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);
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}
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}
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private static class BasicJsonWriteExpression implements JsonWriteExpression {
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private final SelectableMapping selectableMapping;
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private final String customWriteExpressionStart;
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private final String customWriteExpressionEnd;
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BasicJsonWriteExpression(SelectableMapping selectableMapping, String customWriteExpression) {
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this.selectableMapping = selectableMapping;
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if ( customWriteExpression.equals( "?" ) ) {
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this.customWriteExpressionStart = "";
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this.customWriteExpressionEnd = "";
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}
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else {
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final String[] parts = StringHelper.split( "?", customWriteExpression );
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assert parts.length == 2;
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this.customWriteExpressionStart = parts[0];
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this.customWriteExpressionEnd = parts[1];
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}
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}
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@Override
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public void append(
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SqlAppender sb,
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String path,
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SqlAstTranslator<?> translator,
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AggregateColumnWriteExpression expression) {
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sb.append( customWriteExpressionStart );
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// We use NO_UNTYPED here so that expressions which require type inference are casted explicitly,
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// since we don't know how the custom write expression looks like where this is embedded,
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// so we have to be pessimistic and avoid ambiguities
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translator.render( expression.getValueExpression( selectableMapping ), SqlAstNodeRenderingMode.NO_UNTYPED );
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sb.append( customWriteExpressionEnd );
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}
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}
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}
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@ -39,14 +39,14 @@ public class SQLServerUnnestFunction extends UnnestFunction {
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final ModelPart ordinalityPart = tupleType.findSubPart( CollectionPart.Nature.INDEX.getName(), null );
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if ( ordinalityPart != null ) {
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sqlAppender.appendSql( "(select t.*,row_number() over (order by (select null)) " );
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sqlAppender.appendSql( ordinalityPart.asBasicValuedModelPart().getSelectableName() );
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sqlAppender.appendSql( ordinalityPart.asBasicValuedModelPart().getSelectionExpression() );
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sqlAppender.appendSql( " from openjson(" );
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}
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else {
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sqlAppender.appendSql( "openjson(" );
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}
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array.accept( walker );
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sqlAppender.appendSql( ",'$[*]') with (" );
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sqlAppender.appendSql( ") with (" );
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boolean[] comma = new boolean[1];
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if ( tupleType.findSubPart( CollectionPart.Nature.ELEMENT.getName(), null ) == null ) {
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@ -62,7 +62,7 @@ public class SQLServerUnnestFunction extends UnnestFunction {
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sqlAppender.append( selectableMapping.getSelectionExpression() );
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sqlAppender.append( ' ' );
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sqlAppender.append( getDdlType( selectableMapping, SqlTypes.JSON_ARRAY, walker ) );
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sqlAppender.appendSql( " path '$." );
|
||||
sqlAppender.appendSql( " '$." );
|
||||
sqlAppender.append( selectableMapping.getSelectableName() );
|
||||
sqlAppender.appendSql( '\'' );
|
||||
}
|
||||
|
|
@ -81,7 +81,7 @@ public class SQLServerUnnestFunction extends UnnestFunction {
|
|||
sqlAppender.append( selectableMapping.getSelectionExpression() );
|
||||
sqlAppender.append( ' ' );
|
||||
sqlAppender.append( getDdlType( selectableMapping, SqlTypes.JSON_ARRAY, walker ) );
|
||||
sqlAppender.appendSql( " path '$'" );
|
||||
sqlAppender.appendSql( " '$'" );
|
||||
}
|
||||
} );
|
||||
}
|
||||
|
|
|
|||
|
|
@ -10,7 +10,6 @@ import org.hibernate.query.derived.AnonymousTupleTableGroupProducer;
|
|||
import org.hibernate.sql.ast.SqlAstTranslator;
|
||||
import org.hibernate.sql.ast.spi.SqlAppender;
|
||||
import org.hibernate.sql.ast.tree.expression.JsonExistsErrorBehavior;
|
||||
import org.hibernate.sql.ast.tree.expression.JsonPathPassingClause;
|
||||
import org.hibernate.sql.ast.tree.expression.JsonQueryEmptyBehavior;
|
||||
import org.hibernate.sql.ast.tree.expression.JsonQueryErrorBehavior;
|
||||
import org.hibernate.sql.ast.tree.expression.JsonQueryWrapMode;
|
||||
|
|
@ -44,23 +43,21 @@ public class SQLServerJsonTableFunction extends JsonTableFunction {
|
|||
arguments.jsonDocument().accept( walker );
|
||||
if ( arguments.jsonPath() != null ) {
|
||||
sqlAppender.appendSql( ',' );
|
||||
final JsonPathPassingClause passingClause = arguments.passingClause();
|
||||
if ( passingClause != null ) {
|
||||
JsonPathHelper.appendInlinedJsonPathIncludingPassingClause(
|
||||
sqlAppender,
|
||||
// Default behavior is NULL ON ERROR
|
||||
arguments.errorBehavior() == JsonTableErrorBehavior.ERROR ? "strict " : "",
|
||||
arguments.jsonPath(),
|
||||
passingClause,
|
||||
walker
|
||||
);
|
||||
final String prefix = arguments.errorBehavior() == JsonTableErrorBehavior.ERROR ? "strict " : "";
|
||||
final String jsonPathString;
|
||||
if ( arguments.passingClause() != null ) {
|
||||
jsonPathString = prefix + JsonPathHelper.inlinedJsonPathIncludingPassingClause( arguments.jsonPath(),
|
||||
arguments.passingClause(), walker );
|
||||
}
|
||||
else {
|
||||
if ( arguments.errorBehavior() == JsonTableErrorBehavior.ERROR ) {
|
||||
// Default behavior is NULL ON ERROR
|
||||
sqlAppender.appendSql( "'strict '+" );
|
||||
jsonPathString = prefix + walker.getLiteralValue( arguments.jsonPath() );
|
||||
}
|
||||
arguments.jsonPath().accept( walker );
|
||||
if ( jsonPathString.endsWith( "[*]" ) ) {
|
||||
sqlAppender.appendSingleQuoteEscapedString( jsonPathString.substring( 0, jsonPathString.length() - 3 ) );
|
||||
}
|
||||
else {
|
||||
sqlAppender.appendSingleQuoteEscapedString( jsonPathString );
|
||||
}
|
||||
}
|
||||
else if ( arguments.errorBehavior() == JsonTableErrorBehavior.ERROR ) {
|
||||
|
|
|
|||
Loading…
Reference in New Issue