• client-v2/src/main/java/com/clickhouse/client/api/data_formats/internal/ValueConverters.java (225-225) Method name has a typo ('conveSql' instead of 'convertSql').

      public Timestamp convertSqlTimestampToSqlTimestamp(Object value) {
  

• client-v2/src/main/java/com/clickhouse/client/api/data_formats/internal/ValueConverters.java (107-107) Update method reference to match the corrected method name.

          mapBuilder.put(java.sql.Date.class, ImmutableMap.of(java.sql.Date.class, this::convertSqlDateToSqlDate,
  

• client-v2/src/main/java/com/clickhouse/client/api/data_formats/internal/ValueConverters.java (109-109) Update method reference to match the corrected method name.

          mapBuilder.put(Time.class, ImmutableMap.of(Time.class, this::convertSqlTimeToSqlTime,
  

• client-v2/src/main/java/com/clickhouse/client/api/data_formats/internal/ValueConverters.java (111-111) Update method reference to match the corrected method name.

          mapBuilder.put(Timestamp.class, ImmutableMap.of(Timestamp.class, this::convertSqlTimestampToSqlTimestamp,
  

• jdbc-v2/src/main/java/com/clickhouse/jdbc/types/ArrayResultSet.java (95-99) The checkColumnIndex method incorrectly validates column indices against the array length instead of the number of columns (which should be 2 - INDEX and VALUE). This can cause incorrect validation when the array length is less than the column index being checked.

      private void checkColumnIndex(int columnIndex) throws SQLException {
          if (columnIndex < 1 || columnIndex > 2) {
              throw new SQLException("Invalid column index: " + columnIndex);
          }
      }
  

• jdbc-v2/src/main/java/com/clickhouse/jdbc/types/ArrayResultSet.java (1229-1231) The unwrap method returns null, which violates the JDBC specification. According to the JDBC spec, if the implementation doesn't support unwrapping to the requested interface, it should throw an SQLException.

      @Override
      public <T> T unwrap(Class<T> iface) throws SQLException {
          if (iface.isAssignableFrom(getClass())) {
              return iface.cast(this);
          }
          throw new SQLException("Cannot unwrap to " + iface.getName());
      }
  

• jdbc-v2/src/main/java/com/clickhouse/jdbc/types/ArrayResultSet.java (503-506) The previous() method implementation is incorrect. It calls absolute(pos) which would move the cursor to the current position, not the previous one. It should decrement the position before calling absolute().

      @Override
      public boolean previous() throws SQLException {
          return absolute(pos);
      }
  

• client-v2/src/main/java/com/clickhouse/client/api/data_formats/internal/ValueConverters.java (167-173) When wrapping a checked exception, it's better to include the original exception message for better debugging.

      public URL convertStringToURL(Object value) {
          try {
              return new URL((String) value);
          } catch (MalformedURLException e) {
              throw new RuntimeException("Failed to convert string to URL: " + value, e);
          }
      }
  

• jdbc-v2/src/main/java/com/clickhouse/jdbc/internal/JdbcUtils.java (21-21) Duplicate import of `java.sql.Time`. This line should be removed.

jdbc-v2/src/test/java/com/clickhouse/jdbc/types/ArrayResultSetTest.java:1

• Extra space before closing parenthesis. Remove the trailing space for consistent formatting: if (i == 2)

package com.clickhouse.jdbc.types;