EVL – ETL Tool

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Table of Contents


(since EVL 2.7)

Write to stdout or <f_out> SQLite <table>.

It takes the whole table with columns in order defined by EVD, unless <query> and/or <condition> is specified.

Path to the database file is taken from environment variable ‘$EVL_SQLITE_DATABASE’, unless <db_file> is specified.


is to be used in EVS job structure definition file. <f_out> is either output file or flow name.

evl readsqlite

is intended for standalone usage, i.e. to be invoked from command line and writing records to standard output.

EVD and EVS are EVL definition files, for details see evl-evd(5) and evl-evs(5).


  <table> <f_out> (<evd>|-d <inline_evd>)
  [--dbname=<db_file>] [--query=<query>] [-w|--where=<condition>]

evl readsqlite
  <table> (<evd>|-d <inline_evd>)
  [--dbname=<db_file>] [--query=<query>] [-w|--where=<condition>]

evl readsqlite
  ( --help | --usage | --version )


-d, --data-definition=<inline_evd>

either this option or the file <evd> must be presented. Example: -d ’id int, user_id string(6) enc=iso-8859-1’


path to the SQLite database file; if this option is not used, database file is taken from environment variable ‘$EVL_SQLITE_DATABASE’.


Use SQL <query> instead of reading whole table. With this option <table> might be an empty string.

-w, --where=<condition>

use this where condition instead of reading whole table.

-y, --text-output

write the output as text, not binary

Standard options:


print this help and exit


print short usage information and exit

-v, --verbose

print to stderr info/debug messages of the component


print version and exit


  1. To read a table ‘my_table’ in EVL job (i.e. in EVS file) from ‘/home/myself/my_db.sqlite’:
    export EVL_SQLITE_DATABASE="/home/myself/my_db.sqlite"
    Readsqlite my_table MYTABLE evd/mytable.evd
    Map        MYTABLE  ...
  2. Command line usage of sending table ‘my_table’ from ‘/home/myself/my_db.sqlite’ to standard output:
    export EVL_SQLITE_DATABASE="/home/myself/my_db.sqlite"
    evl readsqlite my_table evd/mytable.evd --text-output

    or just

    evl readsqlite –dbname="/home/myself/my_db.sqlite" my_table evd/mytable.evd –text-output