query-builder/src/main/java/com/datastax/dse/driver/internal/querybuilder/schema/DefaultAlterDseTable.java [372:398]:
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        builder.append(')');
      }
      return builder.toString();
    } else if (!columnsToDrop.isEmpty()) {
      boolean moreThanOneDrop = columnsToDrop.size() > 1;
      CqlHelper.appendIds(
          columnsToDrop,
          builder,
          moreThanOneDrop ? " DROP (" : " DROP ",
          ",",
          moreThanOneDrop ? ")" : "");
      return builder.toString();
    } else if (!columnsToRename.isEmpty()) {
      builder.append(" RENAME ");
      boolean first = true;
      for (Map.Entry<CqlIdentifier, CqlIdentifier> entry : columnsToRename.entrySet()) {
        if (first) {
          first = false;
        } else {
          builder.append(" AND ");
        }
        builder
            .append(entry.getKey().asCql(true))
            .append(" TO ")
            .append(entry.getValue().asCql(true));
      }
      return builder.toString();
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query-builder/src/main/java/com/datastax/oss/driver/internal/querybuilder/schema/DefaultAlterTable.java [269:295]:
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        builder.append(')');
      }
      return builder.toString();
    } else if (!columnsToDrop.isEmpty()) {
      boolean moreThanOneDrop = columnsToDrop.size() > 1;
      CqlHelper.appendIds(
          columnsToDrop,
          builder,
          moreThanOneDrop ? " DROP (" : " DROP ",
          ",",
          moreThanOneDrop ? ")" : "");
      return builder.toString();
    } else if (!columnsToRename.isEmpty()) {
      builder.append(" RENAME ");
      boolean first = true;
      for (Map.Entry<CqlIdentifier, CqlIdentifier> entry : columnsToRename.entrySet()) {
        if (first) {
          first = false;
        } else {
          builder.append(" AND ");
        }
        builder
            .append(entry.getKey().asCql(true))
            .append(" TO ")
            .append(entry.getValue().asCql(true));
      }
      return builder.toString();
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