From 139b5a75a5f0b89bc9d9c91f8c06dfb68691c9e0 Mon Sep 17 00:00:00 2001
From: xleoken <xleoken@163.com>
Date: Tue, 26 Nov 2024 17:00:45 +0800
Subject: [PATCH] [core] Improve the performance of show tables (#4592)

---
 .../org/apache/paimon/catalog/AbstractCatalog.java    | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/paimon-core/src/main/java/org/apache/paimon/catalog/AbstractCatalog.java b/paimon-core/src/main/java/org/apache/paimon/catalog/AbstractCatalog.java
index d3a8d628a2bc..16b76513d7ef 100644
--- a/paimon-core/src/main/java/org/apache/paimon/catalog/AbstractCatalog.java
+++ b/paimon-core/src/main/java/org/apache/paimon/catalog/AbstractCatalog.java
@@ -653,7 +653,16 @@ protected List<String> listTablesInFileSystem(Path databasePath) throws IOExcept
     }
 
     protected boolean tableExistsInFileSystem(Path tablePath, String branchName) {
-        return !new SchemaManager(fileIO, tablePath, branchName).listAllIds().isEmpty();
+        SchemaManager schemaManager = new SchemaManager(fileIO, tablePath, branchName);
+
+        // in order to improve the performance, check the schema-0 firstly.
+        boolean schemaZeroExists = schemaManager.schemaExists(0);
+        if (schemaZeroExists) {
+            return true;
+        } else {
+            // if schema-0 not exists, fallback to check other schemas
+            return !schemaManager.listAllIds().isEmpty();
+        }
     }
 
     public Optional<TableSchema> tableSchemaInFileSystem(Path tablePath, String branchName) {