Pretty

Input	Output	Alias
✗	✔

Description

The Pretty format outputs data as Unicode-art tables, using ANSI-escape sequences for displaying colors in the terminal. A full grid of the table is drawn, and each row occupies two lines in the terminal. Each result block is output as a separate table. This is necessary so that blocks can be output without buffering results (buffering would be necessary to pre-calculate the visible width of all the values). NULL is output as ᴺᵁᴸᴸ.

Example usage

Example (shown for the PrettyCompact format):

Query

SELECT * FROM t_null

Response

┌─x─┬────y─┐
│ 1 │ ᴺᵁᴸᴸ │
└───┴──────┘

Rows are not escaped in any of the Pretty formats. The following example is shown for the PrettyCompact format:

Query

SELECT 'String with \'quotes\' and \t character' AS Escaping_test

Response

┌─Escaping_test────────────────────────┐
│ String with 'quotes' and      character │
└──────────────────────────────────────┘

To avoid dumping too much data to the terminal, only the first 10,000 rows are printed. If the number of rows is greater than or equal to 10,000, the message “Showed first 10 000” is printed.

This format is only appropriate for outputting a query result, but not for parsing data.

The Pretty format supports outputting total values (when using WITH TOTALS) and extremes (when ‘extremes’ is set to 1). In these cases, total values and extreme values are output after the main data, in separate tables. This is shown in the following example which uses the PrettyCompact format:

Query

SELECT EventDate, count() AS c 
FROM test.hits 
GROUP BY EventDate 
WITH TOTALS 
ORDER BY EventDate 
FORMAT PrettyCompact

Response

┌──EventDate─┬───────c─┐
│ 2014-03-17 │ 1406958 │
│ 2014-03-18 │ 1383658 │
│ 2014-03-19 │ 1405797 │
│ 2014-03-20 │ 1353623 │
│ 2014-03-21 │ 1245779 │
│ 2014-03-22 │ 1031592 │
│ 2014-03-23 │ 1046491 │
└────────────┴─────────┘

Totals:
┌──EventDate─┬───────c─┐
│ 1970-01-01 │ 8873898 │
└────────────┴─────────┘

Extremes:
┌──EventDate─┬───────c─┐
│ 2014-03-17 │ 1031592 │
│ 2014-03-23 │ 1406958 │
└────────────┴─────────┘

Format settings

The following settings are common to all Pretty formats:

Setting	Description	Default
`output_format_pretty_max_rows`	Row limit for Pretty formats.	`10000`
`output_format_pretty_max_column_pad_width`	Maximum width to pad all values in a column in Pretty formats.	`250`
`output_format_pretty_max_value_width`	Maximum width of value to display in Pretty formats. If greater - it will be cut.	`10000`
`output_format_pretty_color`	Use ANSI escape sequences to paint colors in Pretty formats.	`true`
`output_format_pretty_grid_charset`	Charset for printing grid borders. Available charsets: ASCII, UTF-8.	`UTF-8`
`output_format_pretty_row_numbers`	Add row numbers before each row for pretty output format.	`true`
`output_format_pretty_display_footer_column_names`	Display column names in the footer if table contains many rows.	`true`
`output_format_pretty_display_footer_column_names_min_rows`	Sets the minimum number of rows for which a footer will be displayed if `output_format_pretty_display_footer_column_names` is enabled.	`50`

SQL Reference

Data Types

Engines

Functions

Formats

Settings

System Tables

Data Lakes

Description

Example usage

Format settings

​Description

​Example usage

​Format settings

Description

Example usage

Format settings