From 31d390effb640a1ed5b0be170ad5f58a687bbf30 Mon Sep 17 00:00:00 2001
From: test <mohell@qq.com>
Date: Fri, 29 Dec 2023 21:04:11 +0800
Subject: [PATCH] feat: add information_schema.files

---
 src/catalog/src/information_schema.rs         |  2 +
 .../information_schema/memory_table/tables.rs | 44 +++++++++++++++++++
 .../src/information_schema/table_names.rs     |  1 +
 src/common/catalog/src/consts.rs              |  4 +-
 .../common/show/show_databases_tables.result  |  1 +
 5 files changed, 51 insertions(+), 1 deletion(-)

diff --git a/src/catalog/src/information_schema.rs b/src/catalog/src/information_schema.rs
index 232c2279d938..92427552425f 100644
--- a/src/catalog/src/information_schema.rs
+++ b/src/catalog/src/information_schema.rs
@@ -58,6 +58,7 @@ lazy_static! {
         COLLATION_CHARACTER_SET_APPLICABILITY,
         CHECK_CONSTRAINTS,
         EVENTS,
+        FILES,
     ];
 }
 
@@ -171,6 +172,7 @@ impl InformationSchemaProvider {
             }
             CHECK_CONSTRAINTS => setup_memory_table!(CHECK_CONSTRAINTS),
             EVENTS => setup_memory_table!(EVENTS),
+            FILES => setup_memory_table!(FILES),
             SCHEMATA => Some(Arc::new(InformationSchemaSchemata::new(
                 self.catalog_name.clone(),
                 self.catalog_manager.clone(),
diff --git a/src/catalog/src/information_schema/memory_table/tables.rs b/src/catalog/src/information_schema/memory_table/tables.rs
index abb719ca1b4b..2b73cc12a81d 100644
--- a/src/catalog/src/information_schema/memory_table/tables.rs
+++ b/src/catalog/src/information_schema/memory_table/tables.rs
@@ -183,6 +183,50 @@ pub fn get_schema_columns(table_name: &str) -> (SchemaRef, Vec<VectorRef>) {
             vec![],
         ),
 
+        FILES => (
+            vec![
+                bigint_column("FILE_ID"),
+                string_column("FILE_NAME"),
+                string_column("FILE_TYPE"),
+                string_column("TABLESPACE_NAME"),
+                string_column("TABLE_CATALOG"),
+                string_column("TABLE_SCHEMA"),
+                string_column("TABLE_NAME"),
+                string_column("LOGFILE_GROUP_NAME"),
+                bigint_column("LOGFILE_GROUP_NUMBER"),
+                string_column("ENGINE"),
+                string_column("FULLTEXT_KEYS"),
+                bigint_column("DELETED_ROWS"),
+                bigint_column("UPDATE_COUNT"),
+                bigint_column("FREE_EXTENTS"),
+                bigint_column("TOTAL_EXTENTS"),
+                bigint_column("EXTENT_SIZE"),
+                bigint_column("INITIAL_SIZE"),
+                bigint_column("MAXIMUM_SIZE"),
+                bigint_column("AUTOEXTEND_SIZE"),
+                datetime_column("CREATION_TIME"),
+                datetime_column("LAST_UPDATE_TIME"),
+                datetime_column("LAST_ACCESS_TIME"),
+                datetime_column("RECOVER_TIME"),
+                bigint_column("TRANSACTION_COUNTER"),
+                string_column("VERSION"),
+                string_column("ROW_FORMAT"),
+                bigint_column("TABLE_ROWS"),
+                bigint_column("AVG_ROW_LENGTH"),
+                bigint_column("DATA_LENGTH"),
+                bigint_column("MAX_DATA_LENGTH"),
+                bigint_column("INDEX_LENGTH"),
+                bigint_column("DATA_FREE"),
+                datetime_column("CREATE_TIME"),
+                datetime_column("UPDATE_TIME"),
+                datetime_column("CHECK_TIME"),
+                string_column("CHECKSUM"),
+                string_column("STATUS"),
+                bigint_column("EXTRA"),
+            ],
+            vec![],
+        ),
+
         _ => unreachable!("Unknown table in information_schema: {}", table_name),
     };
 
diff --git a/src/catalog/src/information_schema/table_names.rs b/src/catalog/src/information_schema/table_names.rs
index 73ef00b81bd3..bfdc56d89217 100644
--- a/src/catalog/src/information_schema/table_names.rs
+++ b/src/catalog/src/information_schema/table_names.rs
@@ -25,4 +25,5 @@ pub const COLLATIONS: &str = "collations";
 pub const COLLATION_CHARACTER_SET_APPLICABILITY: &str = "collation_character_set_applicability";
 pub const CHECK_CONSTRAINTS: &str = "check_constraints";
 pub const EVENTS: &str = "events";
+pub const FILES: &str = "files";
 pub const SCHEMATA: &str = "schemata";
diff --git a/src/common/catalog/src/consts.rs b/src/common/catalog/src/consts.rs
index 75c176112db2..9e8b9e4a0768 100644
--- a/src/common/catalog/src/consts.rs
+++ b/src/common/catalog/src/consts.rs
@@ -54,8 +54,10 @@ pub const INFORMATION_SCHEMA_COLLATION_CHARACTER_SET_APPLICABILITY_TABLE_ID: u32
 pub const INFORMATION_SCHEMA_CHECK_CONSTRAINTS_TABLE_ID: u32 = 12;
 /// id for information_schema.EVENTS
 pub const INFORMATION_SCHEMA_EVENTS_TABLE_ID: u32 = 13;
+/// id for information_schema.FILES
+pub const INFORMATION_SCHEMA_FILES_TABLE_ID: u32 = 14;
 /// id for information_schema.SCHEMATA
-pub const INFORMATION_SCHEMA_SCHEMATA_TABLE_ID: u32 = 14;
+pub const INFORMATION_SCHEMA_SCHEMATA_TABLE_ID: u32 = 15;
 /// ----- End of information_schema tables -----
 
 pub const MITO_ENGINE: &str = "mito";
diff --git a/tests/cases/standalone/common/show/show_databases_tables.result b/tests/cases/standalone/common/show/show_databases_tables.result
index a407564c3b4c..8a1e606ad110 100644
--- a/tests/cases/standalone/common/show/show_databases_tables.result
+++ b/tests/cases/standalone/common/show/show_databases_tables.result
@@ -30,6 +30,7 @@ show tables;
 | columns                               |
 | engines                               |
 | events                                |
+| files                                 |
 | schemata                              |
 | tables                                |
 +---------------------------------------+