From 5a3e5c8afa1b031025e00b4261f5f287ed824d16 Mon Sep 17 00:00:00 2001
From: Kodai Doki <52027276+KodaiD@users.noreply.github.com>
Date: Fri, 25 Jul 2025 09:44:53 +0000
Subject: [PATCH 1/2] Empty commit [skip ci]


From 5b7aaa785b6966adc9b20dde43bbdcfed1780ad0 Mon Sep 17 00:00:00 2001
From: Kodai Doki <52027276+KodaiD@users.noreply.github.com>
Date: Fri, 25 Jul 2025 18:44:31 +0900
Subject: [PATCH 2/2] Resolve conflicts

---
 .../db/storage/cassandra/CassandraAdmin.java   | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/core/src/main/java/com/scalar/db/storage/cassandra/CassandraAdmin.java b/core/src/main/java/com/scalar/db/storage/cassandra/CassandraAdmin.java
index 55e75bed63..a8a205c79c 100644
--- a/core/src/main/java/com/scalar/db/storage/cassandra/CassandraAdmin.java
+++ b/core/src/main/java/com/scalar/db/storage/cassandra/CassandraAdmin.java
@@ -211,7 +211,9 @@ private TableMetadata createTableMetadata(com.datastax.driver.core.TableMetadata
       ClusteringOrder clusteringOrder = metadata.getClusteringOrder().get(i);
       builder.addClusteringKey(clusteringColumnName, convertOrder(clusteringOrder));
     }
-    metadata.getIndexes().forEach(i -> builder.addSecondaryIndex(i.getTarget()));
+    metadata
+        .getIndexes()
+        .forEach(i -> builder.addSecondaryIndex(unquoteIfNecessary(i.getTarget())));
     return builder.build();
   }
 
@@ -302,8 +304,8 @@ public void addNewColumnToTable(
       throws ExecutionException {
     try {
       String alterTableQuery =
-          SchemaBuilder.alterTable(namespace, table)
-              .addColumn(columnName)
+          SchemaBuilder.alterTable(quoteIfNecessary(namespace), quoteIfNecessary(table))
+              .addColumn(quoteIfNecessary(columnName))
               .type(toCassandraDataType(columnType))
               .getQueryString();
 
@@ -496,4 +498,14 @@ public String toString() {
       return strategyName;
     }
   }
+
+  private String unquoteIfNecessary(String identifier) {
+    if (identifier == null) {
+      return null;
+    }
+    if (identifier.length() >= 2 && identifier.startsWith("\"") && identifier.endsWith("\"")) {
+      return identifier.substring(1, identifier.length() - 1).replace("\"\"", "\"");
+    }
+    return identifier;
+  }
 }