YQL-19845 CurrentLanguageVersion func

commit_hash:2af511a18740c931b471dc1f2ff36a8b4ce573a8

Author: vitstn

yql/essentials/core/type_ann/type_ann_core.cpp

@@ -11088,6 +11088,26 @@ template <NKikimr::NUdf::EDataSlot DataSlot>
         return IGraphTransformer::TStatus::Repeat;
     }
 
+    IGraphTransformer::TStatus CurrentLanguageVersionWrapper(const TExprNode::TPtr& input, TExprNode::TPtr& output, TExtContext& ctx) {
+        if (!EnsureArgsCount(*input, 0, ctx.Expr)) {
+            return IGraphTransformer::TStatus::Error;
+        }
+
+        TLangVersionBuffer buffer;
+        TStringBuf str;
+        if (!FormatLangVersion(ctx.Types.LangVer, buffer, str)) {
+            str = "";
+        }
+
+        output = ctx.Expr.Builder(input->Pos())
+            .Callable("String")
+                .Atom(0, str)
+            .Seal()
+            .Build();
+
+        return IGraphTransformer::TStatus::Repeat;
+    }
+
     IGraphTransformer::TStatus SecureParamWrapper(const TExprNode::TPtr& input, TExprNode::TPtr&, TExtContext& ctx) {
         if (!EnsureArgsCount(*input, 1, ctx.Expr)) {
             return IGraphTransformer::TStatus::Error;
@@ -13145,6 +13165,7 @@ template <NKikimr::NUdf::EDataSlot DataSlot>
         ExtFunctions["CurrentOperationId"] = &CurrentOperationIdWrapper;
         ExtFunctions["CurrentOperationSharedId"] = &CurrentOperationSharedIdWrapper;
         ExtFunctions["CurrentAuthenticatedUser"] = &CurrentAuthenticatedUserWrapper;
+        ExtFunctions["CurrentLanguageVersion"] = &CurrentLanguageVersionWrapper;
         ExtFunctions["SecureParam"] = &SecureParamWrapper;
         ExtFunctions["UnsafeTimestampCast"] = &UnsafeTimestampCastWrapper;
         ExtFunctions["JsonValue"] = &JsonValueWrapper;

yql/essentials/data/language/sql_functions.json

@@ -369,6 +369,15 @@ SELECT RemoveTimezone(TzDatetime("2018-02-01T12:00:00,Europe/Moscow"));
 SELECT Version();
 ```
 
+## CurrentLanguageVersion {#current-language-version}
+
+`CurrentLanguageVersion()` returns a string describing the current version of the language selected for the current request if it is defined, or an empty string.
+
+#### Examples
+
+```yql
+SELECT CurrentLanguageVersion();
+```
 
 
 ## MAX_OF, MIN_OF, GREATEST, and LEAST {#max-min}

yql/essentials/docs/en/builtins/basic.md

@@ -501,6 +501,16 @@ SELECT RemoveTimezone(TzDatetime("2018-02-01T12:00:00,Europe/Moscow"));
 SELECT Version();
 ```
 
+## CurrentLanguageVersion {#current-language-version}
+
+`CurrentLanguageVersion()` возвращает строку, описывающую текущую версию языка, выбранного для текущего запроса, если она определена, либо пустую строку.
+
+#### Примеры
+
+```yql
+SELECT CurrentLanguageVersion();
+```
+
 
 ## MAX_OF, MIN_OF, GREATEST и LEAST {#max-min}
 

yql/essentials/docs/ru/builtins/basic.md

@@ -3076,6 +3076,7 @@ struct TBuiltinFuncData {
             {"currentoperationid", {"CurrentOperationId", "Normal", BuildNamedArgcBuiltinFactoryCallback<TCallNodeImpl>("CurrentOperationId", 0, 0)}},
             {"currentoperationsharedid", {"CurrentOperationSharedId", "Normal", BuildNamedArgcBuiltinFactoryCallback<TCallNodeImpl>("CurrentOperationSharedId", 0, 0)}},
             {"currentauthenticateduser", {"CurrentAuthenticatedUser", "Normal", BuildNamedArgcBuiltinFactoryCallback<TCallNodeImpl>("CurrentAuthenticatedUser", 0, 0)}},
+            {"currentlanguageversion", {"CurrentLanguageVersion", "Normal", BuildNamedArgcBuiltinFactoryCallback<TCallNodeImpl>("CurrentLanguageVersion", 0, 0)}},
             {"addtimezone", {"AddTimezone", "Normal", BuildSimpleBuiltinFactoryCallback<TYqlAddTimezone>()}},
             {"removetimezone", {"RemoveTimezone", "Normal", BuildNamedArgcBuiltinFactoryCallback<TCallNodeImpl>("RemoveTimezone", 1, 1)}},
             {"pickle", {"Pickle", "Normal", BuildNamedArgcBuiltinFactoryCallback<TCallNodeImpl>("Pickle", 1, 1)}},

yql/essentials/sql/v1/builtin.cpp

@@ -519,16 +519,16 @@
     ],
     "test.test[expr-current_op-default.txt-Debug]": [
         {
-            "checksum": "c514376080191974c8258a19978c0f48",
-            "size": 303,
-            "uri": "https://{canondata_backend}/1130705/84c150c95d2c1a5ae3333b68759e20e3c07850e9/resource.tar.gz#test.test_expr-current_op-default.txt-Debug_/opt.yql"
+            "checksum": "835c25f8a1eced82f952a3a85cbb30c6",
+            "size": 348,
+            "uri": "https://{canondata_backend}/995452/bb7267c9db276bff2bd83cbbbb46f6214f4b395c/resource.tar.gz#test.test_expr-current_op-default.txt-Debug_/opt.yql"
         }
     ],
     "test.test[expr-current_op-default.txt-Results]": [
         {
-            "checksum": "a071d5d303a7a4cafcddef6062ecacc0",
-            "size": 1281,
-            "uri": "https://{canondata_backend}/1130705/84c150c95d2c1a5ae3333b68759e20e3c07850e9/resource.tar.gz#test.test_expr-current_op-default.txt-Results_/results.txt"
+            "checksum": "92bbb10ab985515a637126fa968e3263",
+            "size": 1581,
+            "uri": "https://{canondata_backend}/995452/bb7267c9db276bff2bd83cbbbb46f6214f4b395c/resource.tar.gz#test.test_expr-current_op-default.txt-Results_/results.txt"
         }
     ],
     "test.test[expr-distinct_from-default.txt-Debug]": [

yql/essentials/tests/sql/minirun/part4/canondata/result.json

@@ -2542,9 +2542,9 @@
     ],
     "test_sql2yql.test[expr-current_op]": [
         {
-            "checksum": "dad23f292f63f624470a93ca339916d1",
-            "size": 1342,
-            "uri": "https://{canondata_backend}/937458/0263002581044055229fb35127ddc0a0a0025953/resource.tar.gz#test_sql2yql.test_expr-current_op_/sql.yql"
+            "checksum": "a1dc136c7cc38f00c8b50715c89b9656",
+            "size": 1509,
+            "uri": "https://{canondata_backend}/1871182/089a8d1b6980b7434eb00135a8e369216a14ff2a/resource.tar.gz#test_sql2yql.test_expr-current_op_/sql.yql"
         }
     ],
     "test_sql2yql.test[expr-current_tz]": [

yql/essentials/tests/sql/sql2yql/canondata/result.json

@@ -1,5 +1,6 @@
 SELECT
     CurrentOperationId(),
     CurrentOperationSharedId(),
-    CurrentAuthenticatedUser()
+    CurrentAuthenticatedUser(),
+    CurrentLanguageVersion()
 ;

yql/essentials/tests/sql/sql2yql/canondata/test_sql_format.test_expr-current_op_/formatted.sql

@@ -1 +1,2 @@
-select CurrentOperationId(),CurrentOperationSharedId(),CurrentAuthenticatedUser();
+select CurrentOperationId(),CurrentOperationSharedId(),CurrentAuthenticatedUser(),CurrentLanguageVersion();
+