* fix: data_length, index_length, table_rows in tables
* feat: table stats only works for mito engine currently
* fix: tests
* fix: typo
* chore: log error when region_stats fails
* feat: adds index size to region statistics
* feat: adds the number of rows for region statistics
* test: adds sqlness test for region_statistics
* fix: test
* fix: table resolving logic related to pg_catalog
refer to
https://github.com/GreptimeTeam/greptimedb/issues/3560#issuecomment-2287794348
and #4543
* refactor: remove CatalogProtocol type
* fix: sqlness
* fix: forbid create database pg_catalog with mysql client
* refactor: use QueryContext as arguments rather than Channel
* refactor: pass None as default behaviour in information_schema
* test: fix test
* feat: add function 'pg_catalog.pg_table_is_visible'q
* feat: add 'pg_class' and 'pg_namespace', now we can run '\d' and '\dt'!
* refactor: move memory_table::tables to utils::tables
* refactor: move out predicate to system_schema to reuse it
* feat: predicates pushdown
* test: add pg_namespace, pg_class related sqlness test
* fix: typos and license header
* fix: sqlness test
* refactor: use `expect` instead of `unwrap` here
* refactor: remove the `information_schema::utils` mod
* doc: make the comment in pg_get_userbyid more precise
* doc: add TODO and comment in pg_catalog
* fix: typo
* fix: sqlness
* doc: change to comment on PGClassBuilder to TODO
* WIP: pg_catalog
* refactor: move memory_table to crate public level to reuse it in pgcatalog
* refactor: new system_schema mod to manage implementation of information_schema and pg_catalog
* feat: pg_catalog.pg_type
* fix: remove unused code to avoid warning
* test: add pg_catalog sqlness test
* feat: pg_catalog_cache in system_catalog
* fix: integration test
* test: rollback unit test
* refactor: mix pg_catalog table_id with old ones
* fix: add todo information
* tests: rerun sqlness
---------
Co-authored-by: johnsonlee <johnsonlee@localhost.localdomain>
* fix: forbid to change tables in information_schema
* refactor: use unified read-only check function
* test: add more sqlness tests for information_schema
* refactor: move is_readonly_schema to common_catalog
* fix: `region_peers` returns same region_id for multi logical tables
* test: add sqlness test for information_schema.region_peers
* refactor: region_peers sqlness
