Track sql lang function name before expand (#8333)

Author: vitstn

ydb/library/yql/parser/pg_catalog/catalog.cpp

@@ -2981,6 +2981,7 @@ std::variant<const TProcDesc*, const TTypeDesc*> LookupProcWithCasts(const TStri
         if (NPrivate::IsExactMatch(d->ArgTypes, d->VariadicType, argTypeIds)) {
             // At most one exact match is possible, so look no further
             // https://www.postgresql.org/docs/14/typeconv-func.html, step 2
+            catalog.ExportFunction(d->Name);
             return d;
         }
 
@@ -3031,6 +3032,7 @@ std::variant<const TProcDesc*, const TTypeDesc*> LookupProcWithCasts(const TStri
     switch (candidates.size()) {
         case 1:
             // https://www.postgresql.org/docs/14/typeconv-func.html, end of steps 4.a, 4.c or 4.d
+            catalog.ExportFunction(candidates[0]->Name);
             return candidates[0];
 
         case 0:
@@ -3048,6 +3050,7 @@ std::variant<const TProcDesc*, const TTypeDesc*> LookupProcWithCasts(const TStri
 
     if (1 == candidates.size()) {
         // https://www.postgresql.org/docs/14/typeconv-func.html, end of step 4.e
+        catalog.ExportFunction(candidates[0]->Name);
         return candidates[0];
     }
 
@@ -3084,6 +3087,7 @@ std::variant<const TProcDesc*, const TTypeDesc*> LookupProcWithCasts(const TStri
             }
 
             if (finalCandidate) {
+                catalog.ExportFunction(finalCandidate->Name);
                 return finalCandidate;
             }
         }

ydb/library/yql/parser/pg_catalog/used_procs.h

@@ -96,6 +96,7 @@
 "bitgt",
 "bit_in",
 "bitle",
+"bit_length",
 "bitlt",
 "bitne",
 "bitnot",

ydb/library/yql/tests/sql/yt_native_file/part12/canondata/result.json

@@ -2961,9 +2961,9 @@
     ],
     "test.test[pg_catalog-pg_description_pg_syntax-default.txt-Results]": [
         {
-            "checksum": "d392406fcda7b661799b7a045bdff0f0",
+            "checksum": "c409b6d485074ebf17560f4723affc3d",
             "size": 2768,
-            "uri": "https://{canondata_backend}/1942415/c522571b1a600ba12066095e70b51c341bb2be67/resource.tar.gz#test.test_pg_catalog-pg_description_pg_syntax-default.txt-Results_/results.txt"
+            "uri": "https://{canondata_backend}/1773845/589814889e9fb4d6d34f5e6d53336daf3a27b51e/resource.tar.gz#test.test_pg_catalog-pg_description_pg_syntax-default.txt-Results_/results.txt"
         }
     ],
     "test.test[pg_catalog-pg_timezone_abbrevs-default.txt-Debug]": [