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Problem with displaying "wide" tables in psql - Mailing list pgsql-hackers

From	Sergey Muraviov
Subject	Problem with displaying "wide" tables in psql
Date	December 3, 2013 22:06:18
Msg-id	CAJTaR32A1_d0DqP25T4=LwE3RpmhNf3oY=r0-ksejepfPv6O=w@mail.gmail.com Whole thread Raw
Responses	Re: Problem with displaying "wide" tables in psql Re: Problem with displaying "wide" tables in psql
List	pgsql-hackers

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Hi.

Psql definitely have a problem with displaying "wide" tables.

Even in expanded mode, they look horrible.

So I tried to solve this problem.

Before the patch:

postgres=# \x 1
Expanded display (expanded) is on.
postgres=# \pset border 2
Border style (border) is 2.
postgres=# select * from pg_stats;

+-[ RECORD 1 ]-----------+------------------------------------------------------
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----------------------------------------------------------+
| schemaname | pg_catalog

|
| tablename | pg_proc
...

and after:

+-[ RECORD 1 ]-----------+-----------------------------------------------------+
| schemaname | pg_catalog |
| tablename | pg_proc |
| attname | proname |
| inherited | f |
| null_frac | 0 |
| avg_width | 64 |
| n_distinct | -0.823159 |
| most_common_vals | {max,min,overlaps,has_column_privilege,date_part,int4
,length,substring,sum,to_char,avg,int8,numeric,abs,generate_series,has_any_colum
n_privilege,has_database_privilege,has_foreign_data_wrapper_privilege,has_functi
on_privilege,has_language_privilege,has_schema_privilege,has_sequence_privilege,
has_server_privilege,has_table_privilege,has_tablespace_privilege,has_type_privi
lege,overlay,pg_has_role,point,stddev,stddev_pop,stddev_samp,text,time,timestamp
tz,timezone,var_pop,var_samp,variance,age,float4,float8,int2,isfinite,pg_get_vie
wdef,timestamp,bit_and,bit_or,mod,octet_length,polygon,substr,trunc,ts_headline,
ts_rank,ts_rank_cd,area,bit,bit_length,box,bpchar,btrim,circle,date,date_trunc,i
nterval,ishorizontal,isvertical,lag,lead,like,log,money,name,notlike,position,ro
und,timetz,to_ascii,abbrev,abstime,array_fill,array_to_json,array_to_string,ceil
,ceiling,center,char,char_length,character_length,count,daterange,enum_range,exp
,floor,format,generate_subscripts,get_bit,gin_extract_tsquery,gin_extract_tsvect
or} |
...
| correlation | 0.254019 |
| most_common_elems | |
| most_common_elem_freqs | |
| elem_count_histogram | |
+-[ RECORD 2 ]-----------+-----------------------------------------------------+
| schemaname | pg_catalog |
| tablename | pg_proc |
| attname | pronamespace |
| inherited | f |
| null_frac | 0 |
| avg_width | 4 |
| n_distinct | 2 |
| most_common_vals | {11,12410} |
| most_common_freqs | {0.995274,0.00472627} |
| histogram_bounds | |
| correlation | 1 |
| most_common_elems | |
| most_common_elem_freqs | |
| elem_count_histogram | |
+-[ RECORD 3 ]-----------+-----------------------------------------------------+

Best regards,

Sergey Muraviov

Attachment

fix_psql_print_aligned_vertical.patch

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From: Robert Haas
Date: 03 December 2013, 22:01:57
Subject: Re: 9.2.1 & index-only scans : abnormal heap fetches after VACUUM FULL

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Date: 03 December 2013, 22:06:51
Subject: Parallel Select query performance and shared buffers

Problem with displaying "wide" tables in psql - Mailing list pgsql-hackers

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