[core] Improve the performance of show tables (#4592)

apache · Nov 26, 2024 · 139b5a7 · 139b5a7
1 parent 408b78d
commit 139b5a7
Showing 1 changed file with 10 additions and 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
@@ -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) {