ydb/yql/essentials/parser/pg_catalog/safe_procs.h

"current_database",
"format_type",
"pg_get_userbyid",
"pg_total_relation_size",
"row_to_json",
"version",
"pow",

// some json/jsonb functions
"json_build_object",
"jsonb_build_object",
"jsonb_object",
"jsonb_array_elements",
"jsonb_array_elements_text",
"jsonb_each",
"jsonb_each_text",
"jsonb_extract_path",
"jsonb_extract_path_text",
"jsonb_object_keys",
"jsonb_strip_nulls",
"jsonb_path_match_tz",
"jsonb_path_query_tz",
"jsonb_path_query_array_tz",
"jsonb_path_query_first_tz",
"jsonb_typeof",

"pg_show_all_settings",//pgadmin
"pg_is_in_recovery",//pgadmin
"pg_is_wal_replay_paused",//pgadmin
"has_database_privilege",//pgadmin
"pg_backend_pid",//pgadmin
"has_schema_privilege",//pgadmin

"pg_encoding_to_char",//psql
"pg_function_is_visible",//psql
"pg_get_function_result",//psql
"pg_get_function_arguments",//psql
"pg_table_is_visible",//psql

// postgis
"postgis_lib_version",
"st_interiorringn",
"st_collectionhomogenize",
"st_makeline",

//dbeaver
"pg_get_expr",
"pg_get_partkeydef",
"pg_tablespace_location",
"current_schemas",