• Support derived tables for generating tables with linked foreign key references that cannot be faked.
• Added an online playground for testing dbgen templates.
• Generated data files can be specified to include column names as headers.
• Generated schema files no longer collapse into a single line.
• New functions:
  • debug.panic
• New CLI flags:
  • -N, --total-count (total number of rows to generate)
  • -R, --rows-per-file (number of rows to generate for each file)
    • -N and -R together obsolete the -n, -k, --last-file-inserts-count and --last-insert-rows-count flags.
  • --headers (include column name headers)
  • --zoneinfo (path to tz database)
• The chacha RNG is renamed to chacha20; also added the chacha12 RNG.
• Performance improvement.
• Improved error display.

• Support arrays
  • Construct an array with ARRAY[1, 2, 3]
  • Extract an element with @array[1]
• Support global expressions: evaluating some expressions before generating the data file, used in initialize some shared constants.
• New syntax:
  • CASE WHEN expression without the "case" value.
  • current_timestamp
  • Statements a; b; c, which evaluates all 3 expressions but only keep the last result
  • Bitwise operators a & b | c ^ ~d
• New functions:
  • substring
  • char_length, octet_length
  • overlay
  • div
  • mod
  • coalesce
  • generate_series
  • rand.shuffle
  • rand.uuid
• New CLI flags:
  • --no-schemas (do not dump schemas)
  • --now (override the value of current_timestamp)
  • -D, --initialize (specify global expressions from command line)
• Added step (mock) RNG

• Updated rand dependencies. Seeds from v0.5.0 will no longer produce the same output.

• In a template, expressions can now be placed inside /*{{ … }}*/ blocks in additional to {{ … }} blocks. The former makes it possible to share the same file to both dbgen and the database engine itself.
• Time intervals are now printed as "5 12:23:34.456789" instead of INTERVAL 476614456789 MICROSECOND for better compatibility.
• Support generating CSV files.
• Support compressing output data as gz, xz or zstd.

Fix crash on cargo install from crates.io

• Added round() function.

• rand.u31_timestamp() no longer generates the zero time (1970-01-01 00:00:00), as the zero time is invalid in MySQL.
• --time-zone is no longer a required argument.
• Added more identifying information in the shell script generated by dbschemagen

• Added rand.finite_f32() and rand.finite_f64() functions.
• Added rand.u31_timestamp() function.
• Added --time-zone flag to CLI. The TIMESTAMP syntax will parse the string using the time zone of this flag.
• Added TIMESTAMP WITH TIME ZONE syntax.

dbschemagen:

• Do not allow nullable columns to be part of a PRIMARY KEY
• Added the --seed flag for easier reproduction

• dbschemagen: Limit the number of columns involved in a index to 12.