Added enable_antlr4_parser feature flag (#11764)

Author: asmyasnikov

ydb/core/kqp/host/kqp_host.cpp

@@ -1295,7 +1295,7 @@ class TKqpHost : public IKqpHost {
                 .SetQueryParameters(query.ParameterTypes)
                 .SetApplicationName(ApplicationName)
                 .SetIsEnablePgSyntax(SessionCtx->Config().FeatureFlags.GetEnablePgSyntax())
-                .SetIsEnableAntlr4Parser(SessionCtx->Config().EnableAntlr4Parser);
+                .SetIsEnableAntlr4Parser(SessionCtx->Config().FeatureFlags.GetEnableAntlr4Parser() || SessionCtx->Config().EnableAntlr4Parser);
             NSQLTranslation::TTranslationSettings effectiveSettings;
             auto astRes = ParseQuery(
                 query.Text,

ydb/core/kqp/provider/yql_kikimr_settings.cpp

@@ -59,6 +59,7 @@ TKikimrConfiguration::TKikimrConfiguration() {
     REGISTER_SETTING(*this, _KqpSlowLogNoticeThresholdMs);
     REGISTER_SETTING(*this, _KqpSlowLogTraceThresholdMs);
     REGISTER_SETTING(*this, _KqpYqlSyntaxVersion);
+    REGISTER_SETTING(*this, _KqpYqlAntlr4Parser);
     REGISTER_SETTING(*this, _KqpAllowUnsafeCommit);
     REGISTER_SETTING(*this, _KqpMaxComputeActors);
     REGISTER_SETTING(*this, _KqpEnableSpilling);

ydb/core/kqp/provider/yql_kikimr_settings.h

@@ -34,6 +34,7 @@ struct TKikimrSettings {
     NCommon::TConfSetting<ui32, false> _KqpSlowLogNoticeThresholdMs;
     NCommon::TConfSetting<ui32, false> _KqpSlowLogTraceThresholdMs;
     NCommon::TConfSetting<ui32, false> _KqpYqlSyntaxVersion;
+    NCommon::TConfSetting<bool, false> _KqpYqlAntlr4Parser;
     NCommon::TConfSetting<bool, false> _KqpAllowUnsafeCommit;
     NCommon::TConfSetting<ui32, false> _KqpMaxComputeActors;
     NCommon::TConfSetting<bool, false> _KqpEnableSpilling;

ydb/core/protos/feature_flags.proto

@@ -176,4 +176,5 @@ message TFeatureFlags {
     optional bool EnableTopicAutopartitioningForReplication = 151 [default = false];
     optional bool EnableDriveSerialsDiscovery = 152 [default = false];
     optional bool EnableSeparateDiskSpaceQuotas = 153 [default = false];
+    optional bool EnableAntlr4Parser = 154 [default = false];
 }

ydb/core/testlib/basics/feature_flags.h

@@ -65,6 +65,7 @@ class TTestFeatureFlagsHolder {
     FEATURE_FLAG_SETTER(EnableBackupService)
     FEATURE_FLAG_SETTER(EnableGranularTimecast)
     FEATURE_FLAG_SETTER(EnablePgSyntax)
+    FEATURE_FLAG_SETTER(EnableAntlr4Parser)
     FEATURE_FLAG_SETTER(EnableTieringInColumnShard)
     FEATURE_FLAG_SETTER(EnableMetadataObjectsOnServerless)
     FEATURE_FLAG_SETTER(EnableOlapCompression)