Digital signage using SYS_CONTEXT

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• How to measure width of digital pulse using SMU-6548

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• Graph of digital signal using binary numbers.

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• Identify the schema using sys_context (' USERENV', 'CURRENT_SCHEMA' ")

  DB version: 10.2.0.4
  
  I am trying to create a trigger that will follow all DDL in a particular schema.
  But the relaxation below does not seem to work. Don't know if

  ('USERENV', 'CURRENT_SCHEMA') 

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  create or replace trigger sys.mytest_trg after ddl on database
  declare
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  begin
  
  SELECT sys_context('USERENV', 'CURRENT_SCHEMA') into v_sch_name FROM dual;
  
  if v_sch_name = 'PRODSCHEMA'
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  end mytest_trg;
  /

  Why not simply refers to ora_dict_obj_owner?

  Refer to the documentation:
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• MISP track changes made to a digitized table used during the conversion?

  I need to convert several databases in AL32UTF8, which is 2 TB or so of size.  I want to reduce the outage window.  Most of the data is ASCII, but the character set is WE8ISO8859P15, so it is possible to get the non-ascii character in there.  My plan was to analyze the database while it is live, then run MISP during the blackout without a full re-analysis.  But I fear that a non-ascii character could go in there from scanning the failure.  The MISP track changes since the last scan, so just check the lines that have been added or changed since the scan?  In my tests limited until now, so it seems that complete analysis would take longer than the window of failure, a progressive solution would be wonderful.  However, I don't see how to make this happen.

  
  

  Thank you

  Mike has
  

  No, the CDS is not currently able to track incremental changes. However, you could try to categorize paintings like those who can get new non-ASCII characters and those who cannot. The fact that a given table has at least one non-ASCII character is a pretty good approximation of this classification. In this way, you could just rescan the tables which are likely to get new non-ASCII characters. Depending on the size of the problem tables this may shorten the time to restart the analysis considerably.

  Note that all need conversion CLOB columns, even if they contain ASCII only.

  To minimize the window of downtime, we recommend a solution with GoldenGate. GoldenGate is, however, not a free product.

  Thank you

  Sergiusz

• Specify the end point for the digital using an output circular buffer

  When you use DAQmx and a NOR-DAQ for issuance of a digital signal using a circular buffer (buffer Renault). The program works and works, but when the 'DAQmx Stop Task.vi' function is called to end the task, he stops at the output buffering as soon as it is called and does not wait until the buffer pointer reaches the final value in the buffer. I would like that the program to wait until the buffer pointer is on the last value in the buffer, does anyone know how to specify this setting?

  If you need to stop on exactly the last sample output you will need a way to trigger the stop in the material.  The options available to you will depend on what hardware DAQ, you use, but here are some possibilities on the top of my head:

  1. set up a digital output redeclenchables task finished (not all hardware supports).  Set up a counter of output to issue a periodic trigger with the necessary synchronization signal such that the end result is a "continuous" digital output without interruption.  When you stop your loop, stop the task of counter - digital output ends his generation but the trigger signal will be removed and so it will not continue after that.

  2. If you have an unused extra digital output line, add it to your task.  This line should exit 0 all except the last sample.  Physically, this additional digital line in a wire line PFI and use it to trigger a meter output.  Have the output counter generate a single pulse of some long-term (long enough to ensure that the software can respond prematurely).  Use the output from the task of counter as a trigger of break for the task of digital output.  Do not start the task of the meter until you leave your loop.  Do not stop the task of digital output until you have detected in the software that the meter has been triggered.

  If you need to stop on approximately the last sample output, you could query the TotalSamplesPerChannelGenerated property after leaving your loop and only stop the task once it reaches a multiple of the size of your circular buffer.  This is no guarantee that it stops on the last sample (if you use a device on a bus with a latency higher as USB or Ethernet the non-determinisme would be worse).

  Best regards