feat!: adopt the SQL model and dialect framework from jdbc.db

deparser/api/pom.xml

@@ -27,7 +27,7 @@
   <dependencies>
     <dependency>
       <groupId>org.eclipse.daanse</groupId>
-      <artifactId>org.eclipse.daanse.jdbc.db.dialect.api</artifactId>
+      <artifactId>org.eclipse.daanse.sql.dialect.api</artifactId>
       <version>0.0.1-SNAPSHOT</version>
     </dependency>
     <dependency>

deparser/api/src/main/java/org/eclipse/daanse/sql/deparser/api/DialectDeparser.java

@@ -13,7 +13,7 @@
  */
 package org.eclipse.daanse.sql.deparser.api;
 
-import org.eclipse.daanse.jdbc.db.dialect.api.Dialect;
+import org.eclipse.daanse.sql.dialect.api.Dialect;
 
 /**
  * Dialect-aware SQL deparsers.

deparser/jsqlparser/pom.xml

@@ -32,12 +32,12 @@
     </dependency>
     <dependency>
       <groupId>org.eclipse.daanse</groupId>
-      <artifactId>org.eclipse.daanse.jdbc.db.dialect.api</artifactId>
+      <artifactId>org.eclipse.daanse.sql.dialect.api</artifactId>
       <version>0.0.1-SNAPSHOT</version>
     </dependency>
     <dependency>
       <groupId>org.eclipse.daanse</groupId>
-      <artifactId>org.eclipse.daanse.jdbc.db.dialect.db.common</artifactId>
+      <artifactId>org.eclipse.daanse.sql.dialect.db.common</artifactId>
       <version>0.0.1-SNAPSHOT</version>
     </dependency>
     <dependency>

deparser/jsqlparser/src/main/java/org/eclipse/daanse/sql/deparser/jsqlparser/BasicDialectDeparser.java

@@ -13,7 +13,7 @@
  */
 package org.eclipse.daanse.sql.deparser.jsqlparser;
 
-import org.eclipse.daanse.jdbc.db.dialect.api.Dialect;
+import org.eclipse.daanse.sql.dialect.api.Dialect;
 import org.eclipse.daanse.sql.deparser.api.DialectDeparser;
 import org.osgi.service.component.annotations.Component;
 import org.osgi.service.component.annotations.ServiceScope;

deparser/jsqlparser/src/main/java/org/eclipse/daanse/sql/deparser/jsqlparser/BasicDialectExpressionDeParser.java

@@ -17,8 +17,8 @@
 import java.util.Deque;
 import java.util.Set;
 
-import org.eclipse.daanse.jdbc.db.dialect.api.Dialect;
-import org.eclipse.daanse.jdbc.db.dialect.api.IdentifierQuotingPolicy;
+import org.eclipse.daanse.sql.dialect.api.Dialect;
+import org.eclipse.daanse.sql.dialect.api.IdentifierQuotingPolicy;
 
 import net.sf.jsqlparser.expression.DateValue;
 import net.sf.jsqlparser.expression.DoubleValue;

deparser/jsqlparser/src/main/java/org/eclipse/daanse/sql/deparser/jsqlparser/BasicDialectSelectDeParser.java

@@ -16,8 +16,8 @@
 import java.util.HashSet;
 import java.util.Set;
 
-import org.eclipse.daanse.jdbc.db.dialect.api.Dialect;
-import org.eclipse.daanse.jdbc.db.dialect.api.IdentifierQuotingPolicy;
+import org.eclipse.daanse.sql.dialect.api.Dialect;
+import org.eclipse.daanse.sql.dialect.api.IdentifierQuotingPolicy;
 
 import net.sf.jsqlparser.expression.Alias;
 import net.sf.jsqlparser.expression.ExpressionVisitor;

deparser/jsqlparser/src/main/java/org/eclipse/daanse/sql/deparser/jsqlparser/BasicDialectStatementDeParser.java

@@ -13,7 +13,7 @@
  */
 package org.eclipse.daanse.sql.deparser.jsqlparser;
 
-import org.eclipse.daanse.jdbc.db.dialect.api.Dialect;
+import org.eclipse.daanse.sql.dialect.api.Dialect;
 
 import net.sf.jsqlparser.util.deparser.StatementDeParser;
 

deparser/jsqlparser/src/test/java/org/eclipse/daanse/sql/deparser/jsqlparser/BaiscDialectExpressionDeParserTest.java

@@ -15,7 +15,7 @@
 
 import static org.assertj.core.api.Assertions.assertThat;
 
-import org.eclipse.daanse.jdbc.db.dialect.api.Dialect;
+import org.eclipse.daanse.sql.dialect.api.Dialect;
 import org.junit.jupiter.api.Test;
 
 import net.sf.jsqlparser.expression.DateValue;

deparser/jsqlparser/src/test/java/org/eclipse/daanse/sql/deparser/jsqlparser/DialectStatementDeParserTest.java

@@ -15,7 +15,7 @@
 
 import static org.assertj.core.api.Assertions.assertThat;
 
-import org.eclipse.daanse.jdbc.db.dialect.api.Dialect;
+import org.eclipse.daanse.sql.dialect.api.Dialect;
 import org.junit.jupiter.api.Test;
 
 import net.sf.jsqlparser.JSQLParserException;

deparser/jsqlparser/src/test/java/org/eclipse/daanse/sql/deparser/jsqlparser/MockDialectHelper.java

@@ -19,8 +19,8 @@
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 
-import org.eclipse.daanse.jdbc.db.dialect.api.Dialect;
-import org.eclipse.daanse.jdbc.db.dialect.api.IdentifierQuotingPolicy;
+import org.eclipse.daanse.sql.dialect.api.Dialect;
+import org.eclipse.daanse.sql.dialect.api.IdentifierQuotingPolicy;
 
 public class MockDialectHelper {
 

dialect/api/pom.xml

@@ -0,0 +1,36 @@
+<?xml version="1.0"?>
+<!--
+/*********************************************************************
+* Copyright (c) 2023 Contributors to the Eclipse Foundation.
+*
+* This program and the accompanying materials are made
+* available under the terms of the Eclipse Public License 2.0
+* which is available at https://www.eclipse.org/legal/epl-2.0/
+*
+* SPDX-License-Identifier: EPL-2.0
+**********************************************************************/
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>org.eclipse.daanse</groupId>
+    <artifactId>org.eclipse.daanse.sql.dialect</artifactId>
+    <version>${revision}</version>
+  </parent>
+  <artifactId>org.eclipse.daanse.sql.dialect.api</artifactId>
+  <name>Eclipse Daanse JDBC DB Dialect API</name>
+  <description>API definitions for database dialect support in Daanse JDBC.
+    Provides interfaces and contracts for implementing database-specific SQL
+    dialects, query optimization, and database feature handling across different
+    database systems.</description>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.eclipse.daanse</groupId>
+      <artifactId>org.eclipse.daanse.sql.model</artifactId>
+      <version>0.0.1-SNAPSHOT</version>
+    </dependency>
+  </dependencies>
+</project>

dialect/api/src/main/java/org/eclipse/daanse/sql/dialect/api/DaanseDialectConstants.java

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2025 Contributors to the Eclipse Foundation.
+ *
+ * This program and the accompanying materials are made
+ * available under the terms of the Eclipse Public License 2.0
+ * which is available at https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *   SmartCity Jena - initial
+ *   Stefan Bischof (bipolis.org) - initial
+ */
+package org.eclipse.daanse.sql.dialect.api;
+
+public final class DaanseDialectConstants {
+
+    private DaanseDialectConstants() {
+        // Utility class, no instantiation
+    }
+
+    public static final String PREFIX = "org.eclipse.daanse";
+
+    public static final String DIALECT_NAME_PROPERTY = PREFIX + ".dialect.name";
+}

dialect/api/src/main/java/org/eclipse/daanse/sql/dialect/api/Dialect.java

@@ -0,0 +1,203 @@
+/*
+ * This software is subject to the terms of the Eclipse Public License v1.0
+ * Agreement, available at the following URL:
+ * http://www.eclipse.org/legal/epl-v10.html.
+ * You must accept the terms of that agreement to use this software.
+ *
+ * Copyright (c) 2002-2019 Hitachi Vantara and others.
+ * Copyright (C) 2021 Sergei Semenkov
+ * All rights reserved.
+ * ---- All changes after Fork in 2023 ------------------------
+ *
+ * Project: Eclipse daanse
+ *
+ * Copyright (c) 2023 Contributors to the Eclipse Foundation.
+ *
+ * This program and the accompanying materials are made
+ * available under the terms of the Eclipse Public License 2.0
+ * which is available at https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors after Fork in 2023:
+ *   SmartCity Jena - initial
+ *   Stefan Bischof (bipolis.org) - initial
+ */
+
+package org.eclipse.daanse.sql.dialect.api;
+
+import java.sql.ResultSetMetaData;
+import java.sql.SQLException;
+
+import org.eclipse.daanse.sql.dialect.api.capability.DialectCapabilitiesProvider;
+import org.eclipse.daanse.sql.dialect.api.generator.AggregationGenerator;
+import org.eclipse.daanse.sql.dialect.api.generator.CastGenerator;
+import org.eclipse.daanse.sql.dialect.api.generator.CteGenerator;
+import org.eclipse.daanse.sql.dialect.api.generator.DdlGenerator;
+import org.eclipse.daanse.sql.dialect.api.generator.FunctionGenerator;
+import org.eclipse.daanse.sql.dialect.api.generator.HintGenerator;
+import org.eclipse.daanse.sql.dialect.api.generator.IdentifierQuoter;
+import org.eclipse.daanse.sql.dialect.api.generator.LiteralQuoter;
+import org.eclipse.daanse.sql.dialect.api.generator.MergeGenerator;
+import org.eclipse.daanse.sql.dialect.api.generator.OrderByGenerator;
+import org.eclipse.daanse.sql.dialect.api.generator.PaginationGenerator;
+import org.eclipse.daanse.sql.dialect.api.generator.ParameterPlaceholderGenerator;
+import org.eclipse.daanse.sql.dialect.api.generator.RegexGenerator;
+import org.eclipse.daanse.sql.dialect.api.generator.ReturningGenerator;
+import org.eclipse.daanse.sql.dialect.api.generator.SqlGenerator;
+import org.eclipse.daanse.sql.model.type.BestFitColumnType;
+import org.eclipse.daanse.sql.model.type.Datatype;
+import org.eclipse.daanse.sql.dialect.api.type.TypeMapper;
+
+public interface Dialect
+        extends IdentifierQuoter, LiteralQuoter, DialectCapabilitiesProvider, TypeMapper {
+
+    /**
+     * Whether double values need an explicit {@code "E0"} exponent (LucidDB quirk).
+     */
+    boolean needsExponent(Object value, String valueString);
+
+    /**
+     * Whether the given (type, concurrency) combination is supported on this
+     * engine.
+     */
+    boolean supportsResultSetConcurrency(int type, int concurrency);
+
+    /**
+     * Picks the most appropriate {@link BestFitColumnType} for a result-set column.
+     */
+    BestFitColumnType getType(ResultSetMetaData metadata, int columnIndex) throws SQLException;
+
+    /** @return dialect name (lowercase by convention) */
+    String name();
+
+    /** @return the engine's case-folding rule for unquoted identifiers */
+    default IdentifierCaseFolding caseFolding() {
+        return IdentifierCaseFolding.UPPER;
+    }
+
+    default IdentifierQuotingPolicy quotingPolicy() {
+        return IdentifierQuotingPolicy.ALWAYS;
+    }
+
+    // -------------------- focused-interface accessors --------------------
+    //
+    // The cross-cutting interfaces ({@link IdentifierQuoter}, {@link
+    // LiteralQuoter},
+    // {@link DialectCapabilitiesProvider}, {@link TypeMapper})
+    // are inherited directly — call them on the dialect. The four "builder"
+    // facets below are accessed only via getters. Concrete dialects implement
+    // those interfaces and return {@code this} from each getter.
+
+    /**
+     * Inline-dataset SQL emission ({@code generateInline} — consumed by the statement renderer's
+     * {@code FromInline} spelling).
+     */
+    SqlGenerator sqlGenerator();
+
+    /**
+     * All DDL emission — both string-based primitives ({@code createSchema},
+     * {@code dropTable}, {@code clearTable}, {@code dropSchema}) and
+     * descriptor-based builders ({@code createTable}, {@code createIndex},
+     * {@code dropConstraint}, …).
+     */
+    DdlGenerator ddlGenerator();
+
+    /** ORDER BY clause + NULL ordering builders. */
+    OrderByGenerator orderByGenerator();
+
+    /** Regex match/flag emission. */
+    RegexGenerator regexGenerator();
+
+    /** Aggregate and window function builders. */
+    AggregationGenerator aggregationGenerator();
+
+    /**
+     * SQL scalar-function wrappers ({@code UPPER}, {@code CASE/IIF}, count
+     * adornments).
+     */
+    FunctionGenerator functionGenerator();
+
+    /**
+     * Dialect-specific query hint emission (e.g. {@code USE INDEX},
+     * {@code WITH (NOLOCK)}).
+     */
+    HintGenerator hintGenerator();
+
+    /**
+     * Pagination ({@code LIMIT/OFFSET} vs. {@code FETCH NEXT … ROWS ONLY} vs.
+     * {@code TOP n}).
+     */
+    default PaginationGenerator paginationGenerator() {
+        return new PaginationGenerator() {
+        };
+    }
+
+    /**
+     * Prepared-statement parameter placeholders ({@code ?}, {@code $n},
+     * {@code @pn}).
+     */
+    default ParameterPlaceholderGenerator parameterPlaceholderGenerator() {
+        return new ParameterPlaceholderGenerator() {
+        };
+    }
+
+    /** Common-table-expression ({@code WITH [RECURSIVE] …}) emission. */
+    default CteGenerator cteGenerator() {
+        return new CteGenerator() {
+        };
+    }
+
+    /**
+     * Upsert / merge emission ({@code MERGE INTO}, {@code ON CONFLICT},
+     * {@code ON DUPLICATE KEY UPDATE}).
+     */
+    default MergeGenerator mergeGenerator() {
+        return new MergeGenerator() {
+        };
+    }
+
+    /**
+     * Type-cast emission ({@code CAST(x AS T)}, {@code TRY_CAST},
+     * {@code SAFE_CAST}).
+     */
+    default CastGenerator castGenerator() {
+        return new CastGenerator() {
+        };
+    }
+
+    /** {@code RETURNING}/{@code OUTPUT} clause emission for DML. */
+    default ReturningGenerator returningGenerator() {
+        return new ReturningGenerator() {
+        };
+    }
+
+    /**
+     * The spelling of the duplicate-eliminating set-union operator. ANSI SQL and
+     * virtually every DBMS accept the bare {@code union};
+     */
+    default String unionDistinctKeyword() {
+        return "union";
+    }
+
+    /**
+     * Appends {@code value} to {@code buf} as a literal quoted for {@code datatype} — routing each
+     * type category to the matching {@code quote*Literal} rule. Lives here (not on the neutral
+     * {@link Datatype} type model) so the type model carries no dialect dependency.
+     *
+     * @param datatype the column type whose category selects the quoting rule
+     * @param buf      destination buffer (the literal is appended)
+     * @param value    raw literal text in the canonical SQL form for this type
+     */
+    default void quoteLiteral(Datatype datatype, StringBuilder buf, String value) {
+        switch (datatype) {
+        case VARCHAR, UUID, JSON, XML, INTERVAL, ARRAY, STRUCT, BINARY -> quoteStringLiteral(buf, value);
+        case NUMERIC, INTEGER, DECIMAL, FLOAT, REAL, BIGINT, SMALLINT, DOUBLE -> quoteNumericLiteral(buf, value);
+        case BOOLEAN -> quoteBooleanLiteral(buf, value);
+        case DATE -> quoteDateLiteral(buf, value);
+        case TIME -> quoteTimeLiteral(buf, value);
+        case TIMESTAMP -> quoteTimestampLiteral(buf, value);
+        }
+    }
+
+}