clob

问题 I have a stored procedure in a package in an Oracle database that has 2 input parameters + 1 output CLOB parameter. How do I view the output in Toad? (Preferably with the user only having execute/select permissions) Solution: DECLARE my_output_parameter CLOB; BEGIN my_package.my_stored_proc(1, 2, my_output_parameter); DBMS_OUTPUT.PUT_LINE(my_output_parameter); END; Don't forget to execute as script, rather than just execute statement, and results appear in the DBMS Output window, not the

问题 I have the following table: The problem is that when I try to use JDBC to insert a String to this field I always get the following error: java.sql.SQLException: Data size bigger than max size for this type: 6019 what should I do now? The java code to generate the INSERT is the following: Connection conn2 = null; if(connection==null||connection.isClosed()) { System.out.println("Connection is null"); conn2 = connectDB(); } //REPLACE is non-standard SQL from MySQL, it's counter part of INSERT

问题 More then a year ago I asked about reading DB2 EBCDIC data in a .Net program. The amazingly helpful answer included a routine for reading VARCHAR columns. I am now faced with reading CLOB columns. Is their internal structure similar in that the first word contains the actual size? Or is it the whole word, considering the possible length of the CLOB is much larger? Thanks! 回答1: Not the mainframe but DB2/400 (midrange) appears to store CLOB fields externally from the table itself: CREATE TABLE

问题 I am trying to retrieve an oracle field with datatype clob into a VB array without reformating the retrieval SQL string (simply SELECT * FROM my_table). I am using an ADO recordset. The clob values are lost when I close the connection or do any other action with the recordset. How can I achieve this. 回答1: In one of my projects I tried to manipulate BLOBs and CLOBs using ADO, but without any success, until I switched to Oracle Objects 4 OLE. You need to install and configure Oracle client on

问题 We have a C++ legacy application that connects to an Oracle 11g database. The application uses Microsoft Data Access Objects (DAO) library to allow record browsing and modification. We also have some triggers on tables to track row updates and insertions. The problem is that the triggers don't fire for the CLOB columns that we have in our tables. It gets fired for other columns but for this one CLOB column, it neither fires during update nor during delete. I've added the trigger for all three

问题 When I create a table with a CLOB in it, the CLOB column is reported to have a DATA_LENGTH of 4000: create table test ( data clob ); -- Returns 4000 select data_length from all_tab_cols where table_name = 'TEST'; How can I interpret that? Is that some backwards-compatible tweak, considering that the limit for VARCHAR2 is also 4000? Or is this to indicate that I can only insert / update string literals of length 4000? Is this behaviour of SYS.ALL_TAB_COLS documented somewhere? 回答1: Up to 4000

问题 I am using the db2jcc driver FIX Pack 6 of the 9 series. My code public void setParamsPreparedStatement(PreparedStatement s, String[][] params) throws Exception { ... Clob myClob = s.getConnection().createClob(); myClob.setString(1, params[i][0]); s.setClob(i+1, myClob); In JBoss 5.1.0 GA it throws the error: 12:01:54,914 242266 ERROR [org.jboss.aspects.tx.TxPolicy] (ConsumerMessageQueue:(1):) javax.ejb.EJBTransactionRolledbackException: Unexpected Error java.lang.AbstractMethodError: org

问题 I am inserting clob data into mysql database...here is my code Clob cl=dbCon.createClob(); cl.setString(1,userAbout); dbCon.setAutoCommit(false); PreparedStatement insertClob=dbCon.prepareStatement("UPDATE user_data SET user_about=? WHERE user_id=?"); insertClob.setClob(1,cl); insertClob.setInt(2,userId); int count= insertClob.executeUpdate(); if(count==1){dbCon.commit();dbCon.close();out.write("success");} else{dbCon.rollback();dbCon.close();out.print("error");} this is throwing an exception

问题 I've a table in my oracle DB as below. CREATE TABLE my_table( id RAW(16) NOT NULL, data CLOB, CONSTRAINT my_table_pk PRIMARY KEY (id), CONSTRAINT my_table_json_chk CHECK (data IS JSON) ); INSERT INTO my_table (id, data) VALUES (SYS_GUID(), '{ "FirstName" : "aa", "LastName" : "bb", "Address" : { "Street" : "99 My Street", "City" : "My City", "Country" : "UK", "Postcode" : "A12 34B" }'); Now I know, I can fetch value of a specific property like address of the JSON string using $. Similarly, can

问题 I am trying to update Georgian characters into a clob that is used for XML. I had to use clob, since the text is usually quite large. this is my update part: select = "update datadocumentxml d\n" + " set d.datadocumentxml = updatexml(xmltype(d.datadocumentxml),'/Comments/@Comment', ?)\n" + " .getClobVal(),\n" + " where d.processengineguid = fnguidjava2raw(?)\n" + " and d.datadocumentid = 'Comments'"; ps = conn.prepareStatement(select); ps.setClob(1,clob); ps.setString(2,processid); rs = ps