1. 05 8月, 2001 3 次提交
    • B
      1. Fixed error with empty array ( '{}' ), · f368c94f
      Bruce Momjian 提交于
         test data changed to include such data
      2. Test a dimension of an array ( we support only one-dimension)
      
      Oleg Bartunov
      f368c94f
    • B
      > 1) When a row is retrieved, and then a SQL_FETCH_FIRST is issued, the · f8683e8a
      Bruce Momjian 提交于
      check
      > in convert.c
      > does not consider the fact that the value in the field has been altered to
      > be a '1' if the
      > backend handed it a 't'.  The net result being that the first row on any
      > subsequent queries
      > has all it's boolean set to 0.
      
      Aidan Mountford
      f8683e8a
    • B
      Attached is a patch that does the following: · 184505bb
      Bruce Momjian 提交于
      1) improves performance of commit/rollback by reducing number of round
      trips to the server
      2) uses 7.1 functionality for setting the transaction isolation level
      3) backs out a patch from 11 days ago because that code failed to
      compile under jdk1.1
      
      Details:
      
      1)  The old code was doing the following for each commit:
         commit
         begin
         set transaction isolation level xxx
      thus a call to commit was performing three round trips to the database.
        The new code does this in one round trip as:
         commit; begin; set transaction isolation level xxx
      
      In a simple test program that performs 1000 transactions (where each
      transaction does one simple select inside that transaction) has the
      following before and after timings:
      
      Client and Server on same machine
      
      old         new
      ---         ---
      1.877sec    1.405sec   25.1% improvement
      
      Client and Server on different machines
      old         new
      ---         ---
      4.184sec    2.927sec   34.3% improvement
      
      (all timings are an average of four different runs)
      
      
      2)  The driver was using 'set transaction isolation level xxx' at the
      begining of each transaction, instead of using the new 7.1 syntax of
      'set session characteristics as transaction isolation level xxx' which
      only needs to be done once instead of for each transaction.  This is
      done conditionally (i.e. if server is 7.0 or older do the old behaviour,
      else do the new behaviour) to not break backward compatibility.  This
      also required the movement of some code to check/test database version
      numbers from the DatabaseMetaData object to the Connection object.
      
      3) Finally while testing, I discovered that the code that was checked in
        11 days ago actually didn't compile.  The code in the patch for
      Connection.setCatalog() used Properties.setProperty() which only exists
      in JDK1.2 or higher.  Thus compiling the JDBC1 driver failed as this
      method doesn't exist.  Thus I backed out that patch.
      
      
      Barry Lind
      184505bb
  2. 04 8月, 2001 5 次提交
  3. 03 8月, 2001 3 次提交
  4. 02 8月, 2001 9 次提交
  5. 01 8月, 2001 8 次提交
  6. 31 7月, 2001 7 次提交
  7. 30 7月, 2001 5 次提交