public static Map<String, Integer> getSqlType(@Nullable TableChange tableSchema) {
        if (tableSchema == null) {
            return null;
        }
        Map<String, Integer> postgresType = new LinkedHashMap<>();
        final Table table = tableSchema.getTable();
        table.columns().forEach(column -> {
            postgresType.put(column.name(), column.jdbcType());
        });
        return postgresType;
    }
get a map about column name and type

@param tableSchema table schema
@return map of field name and field type
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/postgres-cdc/src/main/java/org/apache/inlong/sort/cdc/postgres/table/PostgreSQLReadableMetaData.java