Re: psql --html and to_char()

On Wed, Aug 27, 2025 at 6:13 PM Greg Sabino Mullane <htamfids(at)gmail(dot)com>
wrote:

> On Wed, Aug 27, 2025 at 11:28 AM Ron Johnson <ronljohnsonjr(at)gmail(dot)com>
> wrote:
>
>> Is there a way around this, other than writing my own HTMLifier?
>>
>
> Not unless your to_char() output can be coerced back into a numeric. (for
> the archives sake, see fe_utils/print.c for the complete list of
> right-aligned columns: int family, float, numeric, oid, xid, cid, and the
> when-will-it-finally-die money type)
>

Easier to write a generic shell function.

HTMLify_csv()
{
local -rn pFormats="$1"
local line
local -a lFields
printf '<table border=1><font size="2">\n'
read -r line
IFS='|' read -r -a lFields <<< "${line}"
local -i lFldCnt=${#lFields[(at)]}
printf '<tr>'
for ((i=0; i<$lFldCnt; i++)); do printf '<th align="%s">%s</th>' center
"${lFields[i]}"; done
printf "</tr>\n"
while IFS= read -r line
do
[[ $line =~ rows?\)$ ]] && { printf '<tr><td>%s</td></tr>\n'
"$line"; continue; }
IFS='|' read -r -a lFields <<< "${line}"
printf '<tr>'
for ((i=0; i<$lFldCnt; i++))
do
printf '<td align="%s">%s</td>' "${pFormats[i]}" "${lFields[i]}"
done
printf "</tr>\n"
done
printf '</table>\n'
}

declare -a Formats=(right left)
psql -XAc "select to_char(oid::integer, '99,999') as oid, datname from
pg_database;" | HTMLify_csv Formats

It requires an array that describes how you want each column aligned.

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