[Blazebit#1905] Add timestampiso function to abstract timestamp forma…

…tting

core/impl/src/main/java/com/blazebit/persistence/impl/CriteriaBuilderConfigurationImpl.java

@@ -409,6 +409,10 @@
 import com.blazebit.persistence.impl.function.stringxmlagg.OracleGroupConcatBasedStringXmlAggFunction;
 import com.blazebit.persistence.impl.function.stringxmlagg.PostgreSQLStringXmlAggFunction;
 import com.blazebit.persistence.impl.function.subquery.SubqueryFunction;
+import com.blazebit.persistence.impl.function.timestampiso.MySQLTimestampIsoFunction;
+import com.blazebit.persistence.impl.function.timestampiso.PostgreSQLTimestampIsoFunction;
+import com.blazebit.persistence.impl.function.timestampiso.SQLServerTimestampIsoFunction;
+import com.blazebit.persistence.impl.function.timestampiso.TimestampIsoFunction;
 import com.blazebit.persistence.impl.function.tomultiset.ToMultisetFunction;
 import com.blazebit.persistence.impl.function.tostringjson.AbstractToStringJsonFunction;
 import com.blazebit.persistence.impl.function.tostringjson.ForJsonPathToStringJsonFunction;
@@ -1978,6 +1982,15 @@ private void loadFunctions() {
             jpqlFunctionGroup.add(dialectEntry.getKey(), new PercentileDiscFunction(dialectEntry.getValue()));
         }
         registerFunction(jpqlFunctionGroup);
+
+        jpqlFunctionGroup = new JpqlFunctionGroup( TimestampIsoFunction.FUNCTION_NAME, false );
+        jpqlFunctionGroup.add(null, new TimestampIsoFunction());
+        jpqlFunctionGroup.add("postgresql", new PostgreSQLTimestampIsoFunction());
+        jpqlFunctionGroup.add("cockroach", new PostgreSQLTimestampIsoFunction());
+        jpqlFunctionGroup.add("microsoft", new SQLServerTimestampIsoFunction());
+        jpqlFunctionGroup.add("mysql", new MySQLTimestampIsoFunction());
+        jpqlFunctionGroup.add("mysql8", new MySQLTimestampIsoFunction());
+        registerFunction(jpqlFunctionGroup);
     }
 
     private void registerFunction(String name, JpqlFunction function) {

core/impl/src/main/java/com/blazebit/persistence/impl/function/timestampiso/MySQLTimestampIsoFunction.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2014 - 2024 Blazebit.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.blazebit.persistence.impl.function.timestampiso;
+
+/**
+ * @author Christian Beikov
+ * @since 1.6.12
+ */
+public class MySQLTimestampIsoFunction extends TimestampIsoFunction {
+    @Override
+    protected String getExpression(String timestampArgument) {
+        return "date_format(" + timestampArgument + ", '%y-%m-%d %H:%i:%S.%f')";
+    }
+
+}

core/impl/src/main/java/com/blazebit/persistence/impl/function/timestampiso/PostgreSQLTimestampIsoFunction.java

@@ -0,0 +1,28 @@
+/*
+ * Copyright 2014 - 2024 Blazebit.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.blazebit.persistence.impl.function.timestampiso;
+
+/**
+ * @author Christian Beikov
+ * @since 1.6.12
+ */
+public class PostgreSQLTimestampIsoFunction extends TimestampIsoFunction {
+    @Override
+    protected String getExpression(String timestampArgument) {
+        return "to_char(" + timestampArgument + ", 'YYYY-MM-DD HH24:MI:SS.US')";
+    }
+}

core/impl/src/main/java/com/blazebit/persistence/impl/function/timestampiso/SQLServerTimestampIsoFunction.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2014 - 2024 Blazebit.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.blazebit.persistence.impl.function.timestampiso;
+
+/**
+ * @author Christian Beikov
+ * @since 1.6.12
+ */
+public class SQLServerTimestampIsoFunction extends TimestampIsoFunction {
+    @Override
+    protected String getExpression(String timestampArgument) {
+        return "format(" + timestampArgument + ", 'yyyy-MM-dd HH:mm:ss.nnnnnnn')";
+    }
+
+}

core/impl/src/main/java/com/blazebit/persistence/impl/function/timestampiso/TimestampIsoFunction.java

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2014 - 2024 Blazebit.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.blazebit.persistence.impl.function.timestampiso;
+
+import com.blazebit.persistence.spi.FunctionRenderContext;
+import com.blazebit.persistence.spi.JpqlFunction;
+
+/**
+ * @author Christian Beikov
+ * @since 1.6.12
+ */
+public class TimestampIsoFunction implements JpqlFunction {
+    public static final String FUNCTION_NAME = "timestamp_iso";
+
+    @Override
+    public boolean hasArguments() {
+        return true;
+    }
+
+    @Override
+    public boolean hasParenthesesIfNoArguments() {
+        return true;
+    }
+
+    @Override
+    public Class<?> getReturnType(Class<?> firstArgumentType) {
+        return String.class;
+    }
+
+    @Override
+    public void render(FunctionRenderContext context) {
+        if (context.getArgumentsSize() != 1) {
+            throw new RuntimeException("The timestamp_iso function needs exactly one argument <timestamp>! args=" + context);
+        }
+        context.addChunk( getExpression( context.getArgument( 0)));
+    }
+
+    protected String getExpression(String timestampArgument) {
+        return "to_char(" + timestampArgument + ", 'YYYY-MM-DD HH24:MI:SS.FF9')";
+    }
+
+}

entity-view/impl/src/main/java/com/blazebit/persistence/view/impl/type/TimestampishImmutableBasicUserType.java

@@ -32,6 +32,6 @@ public abstract class TimestampishImmutableBasicUserType<X> extends ImmutableBas
 
     @Override
     public String toStringExpression(String expression) {
-        return "TO_CHAR(" + expression + ", 'YYYY-MM-DD HH24:MI:SS.US')";
+        return "TIMESTAMP_ISO(" + expression + ")";
     }
 }