feat: shim for grafana postgresql query builder queries (#259)

* feat: introduce support for grafana query builder

* chore: update readme

* fix: lint and test

* chore: simplify

Author: sunng87

README.md

@@ -36,9 +36,10 @@ the [pgwire](https://github.com/sunng87/pgwire) project.
   - [x] pgcli
   - [x] VSCode SQLTools
   - [ ] Intellij Datagrip
-- BI
+- BI & Visualization
   - [x] Metabase
   - [ ] PowerBI
+  - [x] Grafana
 
 ## Quick Start
 

datafusion-pg-catalog/src/pg_catalog.rs

@@ -42,6 +42,7 @@ pub mod pg_settings;
 pub mod pg_stat_gssapi;
 pub mod pg_tables;
 pub mod pg_views;
+pub mod quote_ident_udf;
 
 const PG_CATALOG_TABLE_PG_AGGREGATE: &str = "pg_aggregate";
 const PG_CATALOG_TABLE_PG_AM: &str = "pg_am";
@@ -1481,6 +1482,8 @@ where
     session_context.register_udf(create_pg_stat_get_numscans());
     session_context.register_udf(create_pg_get_constraintdef());
     session_context.register_udf(create_pg_get_partition_ancestors_udf());
+    session_context.register_udf(quote_ident_udf::create_quote_ident_udf());
+    session_context.register_udf(quote_ident_udf::create_parse_ident_udf());
 
     Ok(())
 }