[feature](fe) Add current_version and version_long functions

fe/fe-common/src/main/java/org/apache/doris/common/VersionStrings.java

@@ -0,0 +1,51 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you 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 org.apache.doris.common;
+
+import org.apache.doris.qe.GlobalVariable;
+
+/**
+ * Centralized version strings for SQL- and variable-facing Doris metadata.
+ */
+public final class VersionStrings {
+
+    private VersionStrings() {
+    }
+
+    public static String mysqlProtocolVersion() {
+        return GlobalVariable.DEFAULT_SERVER_VERSION;
+    }
+
+    public static String currentVersion() {
+        return Version.DORIS_BUILD_VERSION_PREFIX + " " + Version.DORIS_BUILD_VERSION;
+    }
+
+    /**
+     * Stable contract:
+     * "<prefix> <version>; commit=<short-hash>; build_time=<timestamp>; mysql_protocol=<version>; cloud_mode=<bool>"
+     *
+     * Fields are separated by "; " in a fixed order. New fields may only be appended.
+     */
+    public static String versionLong() {
+        return currentVersion()
+                + "; commit=" + Version.DORIS_BUILD_SHORT_HASH
+                + "; build_time=" + Version.DORIS_BUILD_TIME
+                + "; mysql_protocol=" + mysqlProtocolVersion()
+                + "; cloud_mode=" + Config.isCloudMode();
+    }
+}

fe/fe-common/src/main/java/org/apache/doris/qe/GlobalVariable.java

@@ -17,8 +17,7 @@
 
 package org.apache.doris.qe;
 
-import org.apache.doris.common.Config;
-import org.apache.doris.common.Version;
+import org.apache.doris.common.VersionStrings;
 
 import com.google.common.collect.Lists;
 
@@ -96,9 +95,7 @@ public final class GlobalVariable {
     public static int variableVersion = CURRENT_VARIABLE_VERSION;
 
     @VarAttrDef.VarAttr(name = VERSION_COMMENT, flag = VarAttrDef.READ_ONLY)
-    public static String versionComment = Version.DORIS_BUILD_VERSION_PREFIX + " version "
-            + Version.DORIS_BUILD_VERSION + "-" + Version.DORIS_BUILD_SHORT_HASH
-            + (Config.isCloudMode() ? " (Cloud Mode)" : "");
+    public static String versionComment = VersionStrings.versionLong();
 
     @VarAttrDef.VarAttr(name = VERSION)
     public static String version = DEFAULT_SERVER_VERSION;

fe/fe-core/src/main/java/org/apache/doris/catalog/BuiltinScalarFunctions.java

@@ -159,6 +159,7 @@
 import org.apache.doris.nereids.trees.expressions.functions.scalar.CurrentDate;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.CurrentTime;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.CurrentUser;
+import org.apache.doris.nereids.trees.expressions.functions.scalar.CurrentVersion;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.CutIpv6;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.CutToFirstSignificantSubdomain;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.Database;
@@ -554,6 +555,7 @@
 import org.apache.doris.nereids.trees.expressions.functions.scalar.UuidNumeric;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.UuidtoInt;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.Version;
+import org.apache.doris.nereids.trees.expressions.functions.scalar.VersionLong;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.Week;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.WeekCeil;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.WeekFloor;
@@ -726,6 +728,7 @@ public class BuiltinScalarFunctions implements FunctionHelper {
             scalar(CurrentDate.class, "curdate", "current_date"),
             scalar(CurrentTime.class, "curtime", "current_time"),
             scalar(CurrentUser.class, "current_user"),
+            scalar(CurrentVersion.class, "current_version"),
             scalar(CutIpv6.class, "cut_ipv6"),
             scalar(CutToFirstSignificantSubdomain.class, "cut_to_first_significant_subdomain"),
             scalar(Database.class, "database", "schema"),
@@ -1133,6 +1136,7 @@ public class BuiltinScalarFunctions implements FunctionHelper {
             scalar(UuidNumeric.class, "uuid_numeric"),
             scalar(UuidtoInt.class, "uuid_to_int"),
             scalar(Version.class, "version"),
+            scalar(VersionLong.class, "version_long"),
             scalar(Week.class, "week"),
             scalar(WeekCeil.class, "week_ceil"),
             scalar(WeekFloor.class, "week_floor"),

fe/fe-core/src/main/java/org/apache/doris/nereids/rules/expression/rules/FoldConstantRuleOnFE.java

@@ -20,6 +20,7 @@
 import org.apache.doris.catalog.EncryptKey;
 import org.apache.doris.catalog.Env;
 import org.apache.doris.common.ErrorCode;
+import org.apache.doris.common.VersionStrings;
 import org.apache.doris.common.util.DebugUtil;
 import org.apache.doris.datasource.InternalCatalog;
 import org.apache.doris.mysql.privilege.PrivPredicate;
@@ -66,6 +67,7 @@
 import org.apache.doris.nereids.trees.expressions.functions.scalar.ConnectionId;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.CurrentCatalog;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.CurrentUser;
+import org.apache.doris.nereids.trees.expressions.functions.scalar.CurrentVersion;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.Database;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.Date;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.EncryptKeyRef;
@@ -77,6 +79,7 @@
 import org.apache.doris.nereids.trees.expressions.functions.scalar.SessionUser;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.User;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.Version;
+import org.apache.doris.nereids.trees.expressions.functions.scalar.VersionLong;
 import org.apache.doris.nereids.trees.expressions.literal.ArrayLiteral;
 import org.apache.doris.nereids.trees.expressions.literal.BigIntLiteral;
 import org.apache.doris.nereids.trees.expressions.literal.BooleanLiteral;
@@ -164,6 +167,7 @@ public List<ExpressionPatternMatcher<? extends Expression>> buildRules() {
                 matches(Database.class, this::visitDatabase),
                 matches(CurrentUser.class, this::visitCurrentUser),
                 matches(CurrentCatalog.class, this::visitCurrentCatalog),
+                matches(CurrentVersion.class, this::visitCurrentVersion),
                 matches(User.class, this::visitUser),
                 matches(ConnectionId.class, this::visitConnectionId),
                 matches(And.class, this::visitAnd),
@@ -180,6 +184,7 @@ public List<ExpressionPatternMatcher<? extends Expression>> buildRules() {
                 matches(Array.class, this::visitArray),
                 matches(Date.class, this::visitDate),
                 matches(Version.class, this::visitVersion),
+                matches(VersionLong.class, this::visitVersionLong),
                 matches(SessionUser.class, this::visitSessionUser),
                 matches(LastQueryId.class, this::visitLastQueryId),
                 matches(Nvl.class, this::visitNvl),
@@ -373,6 +378,11 @@ public Expression visitCurrentCatalog(CurrentCatalog currentCatalog, ExpressionR
         return new VarcharLiteral(res);
     }
 
+    @Override
+    public Expression visitCurrentVersion(CurrentVersion currentVersion, ExpressionRewriteContext context) {
+        return new VarcharLiteral(VersionStrings.currentVersion());
+    }
+
     @Override
     public Expression visitUser(User user, ExpressionRewriteContext context) {
         String res = context.cascadesContext.getConnectContext().getUserWithLoginRemoteIpString();
@@ -716,6 +726,11 @@ public Expression visitVersion(Version version, ExpressionRewriteContext context
         return new StringLiteral(GlobalVariable.version);
     }
 
+    @Override
+    public Expression visitVersionLong(VersionLong versionLong, ExpressionRewriteContext context) {
+        return new VarcharLiteral(VersionStrings.versionLong());
+    }
+
     @Override
     public Expression visitNvl(Nvl nvl, ExpressionRewriteContext context) {
         Nvl originNvl = nvl;

fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/CurrentVersion.java

@@ -0,0 +1,67 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you 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 org.apache.doris.nereids.trees.expressions.functions.scalar;
+
+import org.apache.doris.catalog.FunctionSignature;
+import org.apache.doris.nereids.trees.expressions.Expression;
+import org.apache.doris.nereids.trees.expressions.functions.AlwaysNotNullable;
+import org.apache.doris.nereids.trees.expressions.functions.ExplicitlyCastableSignature;
+import org.apache.doris.nereids.trees.expressions.shape.LeafExpression;
+import org.apache.doris.nereids.trees.expressions.visitor.ExpressionVisitor;
+import org.apache.doris.nereids.types.VarcharType;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.ImmutableList;
+
+import java.util.List;
+
+/**
+ * ScalarFunction 'CurrentVersion'.
+ */
+public class CurrentVersion extends ScalarFunction
+        implements LeafExpression, ExplicitlyCastableSignature, AlwaysNotNullable {
+
+    public static final List<FunctionSignature> SIGNATURES = ImmutableList.of(
+            FunctionSignature.ret(VarcharType.SYSTEM_DEFAULT).args()
+    );
+
+    public CurrentVersion() {
+        super("current_version", ImmutableList.of());
+    }
+
+    /** constructor for withChildren and reuse signature */
+    private CurrentVersion(ScalarFunctionParams functionParams) {
+        super(functionParams);
+    }
+
+    @Override
+    public Expression withChildren(List<Expression> children) {
+        Preconditions.checkArgument(children.isEmpty());
+        return new CurrentVersion(getFunctionParams(children));
+    }
+
+    @Override
+    public List<FunctionSignature> getSignatures() {
+        return SIGNATURES;
+    }
+
+    @Override
+    public <R, C> R accept(ExpressionVisitor<R, C> visitor, C context) {
+        return visitor.visitCurrentVersion(this, context);
+    }
+}

fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/VersionLong.java

@@ -0,0 +1,67 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you 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 org.apache.doris.nereids.trees.expressions.functions.scalar;
+
+import org.apache.doris.catalog.FunctionSignature;
+import org.apache.doris.nereids.trees.expressions.Expression;
+import org.apache.doris.nereids.trees.expressions.functions.AlwaysNotNullable;
+import org.apache.doris.nereids.trees.expressions.functions.ExplicitlyCastableSignature;
+import org.apache.doris.nereids.trees.expressions.shape.LeafExpression;
+import org.apache.doris.nereids.trees.expressions.visitor.ExpressionVisitor;
+import org.apache.doris.nereids.types.VarcharType;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.ImmutableList;
+
+import java.util.List;
+
+/**
+ * ScalarFunction 'VersionLong'.
+ */
+public class VersionLong extends ScalarFunction
+        implements LeafExpression, ExplicitlyCastableSignature, AlwaysNotNullable {
+
+    public static final List<FunctionSignature> SIGNATURES = ImmutableList.of(
+            FunctionSignature.ret(VarcharType.SYSTEM_DEFAULT).args()
+    );
+
+    public VersionLong() {
+        super("version_long", ImmutableList.of());
+    }
+
+    /** constructor for withChildren and reuse signature */
+    private VersionLong(ScalarFunctionParams functionParams) {
+        super(functionParams);
+    }
+
+    @Override
+    public Expression withChildren(List<Expression> children) {
+        Preconditions.checkArgument(children.isEmpty());
+        return new VersionLong(getFunctionParams(children));
+    }
+
+    @Override
+    public List<FunctionSignature> getSignatures() {
+        return SIGNATURES;
+    }
+
+    @Override
+    public <R, C> R accept(ExpressionVisitor<R, C> visitor, C context) {
+        return visitor.visitVersionLong(this, context);
+    }
+}

fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/visitor/ScalarFunctionVisitor.java

@@ -170,6 +170,7 @@
 import org.apache.doris.nereids.trees.expressions.functions.scalar.CurrentDate;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.CurrentTime;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.CurrentUser;
+import org.apache.doris.nereids.trees.expressions.functions.scalar.CurrentVersion;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.CutIpv6;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.CutToFirstSignificantSubdomain;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.Database;
@@ -574,6 +575,7 @@
 import org.apache.doris.nereids.trees.expressions.functions.scalar.UuidNumeric;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.UuidtoInt;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.Version;
+import org.apache.doris.nereids.trees.expressions.functions.scalar.VersionLong;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.Week;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.WeekCeil;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.WeekFloor;
@@ -1146,6 +1148,10 @@ default R visitCurrentUser(CurrentUser currentUser, C context) {
         return visitScalarFunction(currentUser, context);
     }
 
+    default R visitCurrentVersion(CurrentVersion currentVersion, C context) {
+        return visitScalarFunction(currentVersion, context);
+    }
+
     default R visitCutIpv6(CutIpv6 cutIpv6, C context) {
         return visitScalarFunction(cutIpv6, context);
     }
@@ -2698,6 +2704,10 @@ default R visitVersion(Version version, C context) {
         return visitScalarFunction(version, context);
     }
 
+    default R visitVersionLong(VersionLong versionLong, C context) {
+        return visitScalarFunction(versionLong, context);
+    }
+
     default R visitWeek(Week week, C context) {
         return visitScalarFunction(week, context);
     }

fe/fe-core/src/test/java/org/apache/doris/nereids/rules/expression/FoldConstantTest.java

@@ -17,6 +17,7 @@
 
 package org.apache.doris.nereids.rules.expression;
 
+import org.apache.doris.common.VersionStrings;
 import org.apache.doris.nereids.analyzer.UnboundRelation;
 import org.apache.doris.nereids.exceptions.AnalysisException;
 import org.apache.doris.nereids.exceptions.NotSupportedException;
@@ -1403,6 +1404,16 @@ void testFoldTypeOfNullLiteral() {
         Assertions.assertTrue(e1.getDataType() instanceof VarcharType);
     }
 
+    @Test
+    void testFoldCurrentVersion() {
+        assertRewriteExpression("current_version()", "'" + VersionStrings.currentVersion() + "'");
+    }
+
+    @Test
+    void testFoldVersionLong() {
+        assertRewriteExpression("version_long()", "'" + VersionStrings.versionLong() + "'");
+    }
+
     @Test
     void testFoldNvl() {
         executor = new ExpressionRuleExecutor(ImmutableList.of(

regression-test/suites/query_p0/system/test_query_sys.groovy

@@ -23,6 +23,21 @@ suite("test_query_sys", "query,p0") {
     sql "SELECT \"welecome to my blog!\";"
     sql "describe ${tableName};"
     sql "select version();"
+    def currentVersion = sql "select current_version();"
+    assertTrue(currentVersion.size() == 1)
+    assertTrue(currentVersion[0].size() == 1)
+    assertTrue(currentVersion[0][0].contains("Apache Doris"))
+    def versionLong = sql "select version_long();"
+    assertTrue(versionLong.size() == 1)
+    assertTrue(versionLong[0].size() == 1)
+    assertTrue(versionLong[0][0].contains("Apache Doris"))
+    assertTrue(versionLong[0][0].contains("mysql_protocol=5.7.99"))
+    assertTrue(versionLong[0][0].contains("commit="))
+    def versionComment = sql "select @@version_comment;"
+    assertTrue(versionComment.size() == 1)
+    assertTrue(versionComment[0].size() == 1)
+    assertTrue(versionComment[0][0].contains("Apache Doris"))
+    assertTrue(versionComment[0][0].contains("mysql_protocol=5.7.99"))
     sql "select rand();"
     sql "select rand(20);"
     sql "select random();"