I have a function which creates a string from a result set. And the one that sends messages. You can see them below I need to write a test which calls sender with the parameter string which was generated before. That’s what I have for now: Unfortunately, I am told: Why is the reportData empty? How can I…
Tag: resultset
Save a Resultset to an Array in java
I want to save the result of a whole Mysql table in an array it returns this to me from the database run: brandon Brandon Julio Daniel BUILD SUCCESSFUL (total time: 1 second) I want to save what is in the database in an array to be able to implement it with a sort and search method that’s why I
how to solve java.lang.NoSuchFieldError: RETURN_NULL_AND_BLANK in java
here ssa_msg_daily contains blank or null values in the table,so while compiling i am getting error as Exception in thread “main” java.lang.NoSuchFieldError: RETURN_NULL_AND_BLANK occurs @ XSSFWorkbook workbook = new XSSFWorkbook(); how can i handle this situation and i am using the resultset to c…
ResultSet to HashMap
I am trying to pass the output of a ResultSet to Java HashMap. While the Output1 is showing all the records(from the DB). The put command only takes the last value from the ResultSet in. Output1: Output2: How do I make the put command to iterate over the results from the ResultSet? Answer All your IDs are ide…
Get a BigInteger attribute from Cassandra ResultSet
I’m trying to get the number of key value pairs in a Cassandra column family. Following is the code I used. But when I ran this code, I’m getting following exception. According to datastax documentation (http://www.datastax.com/drivers/java/2.0/com/datastax/driver/core/Row.html) getVarint should r…
JDBC ResultSet: I need a getDateTime, but there is only getDate and getTimeStamp
I would like to get the DATETIME column from an Oracle DB Table with JDBC. Here is my code: I have to identify the column type first. The field I am interested in is recognized as a Types.DATE, but it is really a DATETIME in the DB since it has this format: “07.05.2009 13:49:32” getDate truncates …
Checking for a null int value from a Java ResultSet
In Java I’m trying to test for a null value, from a ResultSet, where the column is being cast to a primitive int type. From the code fragment above, is there a better way to do this, and I assume that the second wasNull() test is redundant? Educate us, and Thanks Answer The default for ResultSet.getInt …
Oracle doesn’t remove cursors after closing result set
Note: we reuse single connection. Answer The init.ora parameter open_cursors defines the maximum of opened cursors a session can have at once. It has a default value of 50. If the application exceeds this number the error “ORA-01000: maximum open cursors exceeded” is raised. Therefore it’s m…
ResultSet: Retrieving column values by index versus retrieving by label
When using JDBC, I often come across constructs like I asked myself (and authors of code too) why not to use labels for retrieving column values: The best explanation I’ve heard is something concerning performance. But actually, does it make processing extremely fast? I don’t believe so, though I …