Fix double backtick wrapping in setCatalog and setSchema

NEXT_CHANGELOG.md

@@ -76,11 +76,12 @@ upgrading. These changes do not affect metadata on All-Purpose Clusters.
 - Fixed `?` characters inside SQL comments, string literals, and quoted identifiers being incorrectly counted as parameter placeholders when `supportManyParameters=1`. `SQLInterpolator` now uses `SqlCommentParser` to locate only real placeholders. Fixes #1331.
 - Fixed `MetadataOperationTimeout` not being applied when metadata operations use SHOW commands. Operations like `getTables`, `getSchemas`, and `getColumns` now respect the `MetadataOperationTimeout` connection property instead of hanging indefinitely with no timeout.
 - Reclassify transient server errors to standard SQL states (08S01, 40001) across all Thrift error sites. This ensures UC unavailability and concurrent modification errors surface consistently for better retry handling. Note: Dashboards and branching logic keyed on legacy XXUCC or 42000 must be updated.
+- Fixed `setCatalog()` and `setSchema()` producing invalid SQL (e.g. `SET CATALOG ``name``) when the catalog or schema name was passed already wrapped in backticks. Backticks are now stripped before wrapping, and `getCatalog()`/`getSchema()` return the bare identifier name.
 - Fixed telemetry HTTP client socket leak that prevented CRaC checkpoint. After `Connection.close()`, delayed telemetry flush tasks could re-create HTTP clients that were never closed, leaking TCP sockets. Fixes #1325.
 - Fixed client-side enforcement of `maxRows` limit. When `statement.setMaxRows()` is set, `ResultSet.next()` now returns false once the row limit is reached, even if the server returns more rows. Applies to all result types (Thrift, SEA, inline, CloudFetch).
 - Bump shaded `bouncycastle` (`bcprov-jdk18on`, `bcpkix-jdk18on`) from 1.79 to 1.84 to address [CVE-2026-5598](https://github.com/advisories/GHSA-p93r-85wp-75v3) (covert timing channel, severity 8.9) and two related MEDIUM CVEs (GHSA-wg6q-6289-32hp, GHSA-c3fc-8qff-9hwx). All three are unsurfaced by NVD-CPE scanners but visible to GHSA-backed scanners like OSV.
 - Bump shaded `libthrift` from 0.19.0 to 0.23.0 to clear the May 2026 Apache Thrift advisory batch (GHSA-7pwc-h2j2-rjgj covering CVE-2026-41603/41604/41605/43869). The libthrift 0.21 release changed `ProcessFunction`'s generic signatures, which required regenerating the project's checked-in Thrift-generated Java sources with the matching compiler.
 
 ---
 *Note: When making changes, please add your change under the appropriate section
-with a brief description.*
+with a brief description.*

src/main/java/com/databricks/jdbc/api/impl/DatabricksConnection.java

@@ -489,8 +489,9 @@ public void setCatalog(String catalog) throws SQLException {
       return;
     }
     Statement statement = this.createStatement();
-    statement.execute("SET CATALOG `" + catalog + "`");
-    this.session.setCatalog(catalog);
+    String cleanCatalog = stripBackticks(catalog);
+    statement.execute("SET CATALOG `" + cleanCatalog + "`");
+    this.session.setCatalog(cleanCatalog);
   }
 
   @Override
@@ -865,8 +866,9 @@ public Struct createStruct(String typeName, Object[] attributes) throws SQLExcep
   @Override
   public void setSchema(String schema) throws SQLException {
     Statement statement = this.createStatement();
-    statement.execute("USE SCHEMA `" + schema + "`");
-    session.setSchema(schema);
+    String cleanSchema = stripBackticks(schema);
+    statement.execute("USE SCHEMA `" + cleanSchema + "`");
+    session.setSchema(cleanSchema);
   }
 
   @Override
@@ -1090,4 +1092,14 @@ private void closeStatementSafely(Statement statement) {
       }
     }
   }
+
+  private static String stripBackticks(String identifier) {
+    if (identifier != null
+        && identifier.startsWith("`")
+        && identifier.endsWith("`")
+        && identifier.length() >= 2) {
+      return identifier.substring(1, identifier.length() - 1);
+    }
+    return identifier;
+  }
 }

src/test/java/com/databricks/jdbc/api/impl/DatabricksConnectionTest.java

@@ -134,6 +134,60 @@ public void testGetAndSetSchemaAndCatalog() throws SQLException {
     assertEquals(connection.getSchema(), DEFAULT_SCHEMA);
   }
 
+  @Test
+  public void testSetCatalogAndSchemaWithPreWrappedBackticks() throws SQLException {
+    when(databricksClient.createSession(
+            new Warehouse(WAREHOUSE_ID), CATALOG, SCHEMA, new HashMap<>()))
+        .thenReturn(IMMUTABLE_SESSION_INFO);
+    connection = new DatabricksConnection(connectionContext, databricksClient);
+    connection.open();
+
+    String backtickWrappedCatalog = "`catalog-with-hyphen`";
+    when(databricksClient.executeStatement(
+            eq("SET CATALOG `catalog-with-hyphen`"),
+            eq(new Warehouse(WAREHOUSE_ID)),
+            eq(new HashMap<>()),
+            eq(StatementType.SQL),
+            any(),
+            any(),
+            any()))
+        .thenReturn(resultSet);
+    connection.setCatalog(backtickWrappedCatalog);
+    assertEquals(connection.getCatalog(), "catalog-with-hyphen");
+
+    String backtickWrappedSchema = "`schema-with-hyphen`";
+    when(databricksClient.executeStatement(
+            eq("USE SCHEMA `schema-with-hyphen`"),
+            eq(new Warehouse(WAREHOUSE_ID)),
+            eq(new HashMap<>()),
+            eq(StatementType.SQL),
+            any(),
+            any(),
+            any()))
+        .thenReturn(resultSet);
+    connection.setSchema(backtickWrappedSchema);
+    assertEquals(connection.getSchema(), "schema-with-hyphen");
+
+    verify(databricksClient)
+        .executeStatement(
+            eq("SET CATALOG `catalog-with-hyphen`"),
+            eq(new Warehouse(WAREHOUSE_ID)),
+            eq(new HashMap<>()),
+            eq(StatementType.SQL),
+            any(),
+            any(),
+            any());
+    verify(databricksClient)
+        .executeStatement(
+            eq("USE SCHEMA `schema-with-hyphen`"),
+            eq(new Warehouse(WAREHOUSE_ID)),
+            eq(new HashMap<>()),
+            eq(StatementType.SQL),
+            any(),
+            any(),
+            any());
+  }
+
   @Test
   public void testSetCatalogAndSchemaWithHyphenatedIdentifiers() throws SQLException {
     when(databricksClient.createSession(