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Procedure SET_FLUSH_INTERVAL

RDB$PROFILER.SET_FLUSH_INTERVAL turns periodic auto-flush on (when FLUSH_INTERVAL is greater than 0) or off (when FLUSH_INTERVAL is equal to 0).

FLUSH_INTERVAL is interpreted as number of seconds.

Input parameters
  • FLUSH_INTERVAL type INTEGER NOT NULL

  • ATTACHMENT_ID type BIGINT NOT NULL default CURRENT_CONNECTION

Example

Below is a sample profile session and queries for data analysis.

  1. Preparation — create table and routines that will be analyzed

    create table tab (
        id integer not null,
        val integer not null
    );
    
    set term !;
    
    create or alter function mult(p1 integer, p2 integer) returns integer
    as
    begin
        return p1 * p2;
    end!
    
    create or alter procedure ins
    as
        declare n integer = 1;
    begin
        while (n <= 1000)
        do
        begin
            if (mod(n, 2) = 1) then
                insert into tab values (:n, mult(:n, 2));
            n = n + 1;
        end
    end!
    
    set term ;!
  2. Start profiling

    select rdb$profiler.start_session('Profile Session 1') from rdb$database;
    
    set term !;
    
    execute block
    as
    begin
        execute procedure ins;
        delete from tab;
    end!
    
    set term ;!
    
    execute procedure rdb$profiler.finish_session(true);
    
    execute procedure ins;
    
    select rdb$profiler.start_session('Profile Session 2') from rdb$database;
    
    select mod(id, 5),
           sum(val)
      from tab
      where id <= 50
      group by mod(id, 5)
      order by sum(val);
    
    execute procedure rdb$profiler.finish_session(true);
  3. Data analysis

    set transaction read committed;
    
    select * from plg$prof_sessions;
    
    select * from plg$prof_psql_stats_view;
    
    select * from plg$prof_record_source_stats_view;
    
    select preq.*
      from plg$prof_requests preq
      join plg$prof_sessions pses
        on pses.profile_id = preq.profile_id and
           pses.description = 'Profile Session 1';
    
    select pstat.*
      from plg$prof_psql_stats pstat
      join plg$prof_sessions pses
        on pses.profile_id = pstat.profile_id and
           pses.description = 'Profile Session 1'
      order by pstat.profile_id,
               pstat.request_id,
               pstat.line_num,
               pstat.column_num;
    
    select pstat.*
      from plg$prof_record_source_stats pstat
      join plg$prof_sessions pses
        on pses.profile_id = pstat.profile_id and
           pses.description = 'Profile Session 2'
      order by pstat.profile_id,
               pstat.request_id,
               pstat.cursor_id,
               pstat.record_source_id;

RDB$TIME_ZONE_UTIL

A package of time zone utility functions and procedures.

Function DATABASE_VERSION

RDB$TIME_ZONE_UTIL.DATABASE_VERSION returns the version of the time zone database.

Return type: VARCHAR(10) CHARACTER SET ASCII.

Example
select rdb$time_zone_util.database_version()
from rdb$database;

Returns:

DATABASE_VERSION
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