út 2. 6. 2020 v 0:30 odesílatel Tom Lane <tgl@sss.pgh.pa.us> napsal:
As of HEAD, building the PDF docs for A4 paper draws 538 "contents ... exceed the available area" warnings. While this is a nice step forward from where we were (v12 has more than 1500 such warnings), we're far from done fixing that issue.
A large chunk of the remaining warnings are about tables that describe the columns of system catalogs, system views, and information_schema views. The typical contents of a row in such a table are a field name, a field data type, possibly a "references" link, and then a description. Unsurprisingly, this does not work very well for descriptions of more than a few words. And not infrequently, we *need* more than a few words.
ISTM this is more or less the same problem we have/had with function descriptions, and so I'm tempted to solve it in more or less the same way. Let's redefine the table layout to look like, say, this for pg_attrdef [1]:
oid oid Row identifier
adrelid oid (references pg_class.oid) The table this column belongs to
adnum int2 (references pg_attribute.attnum) The number of the column
adbin pg_node_tree The column default value, in nodeToString() representation. Use pg_get_expr(adbin, adrelid) to convert it to an SQL expression.
That is, let's go over to something that's more or less like a table-ized <variablelist>, with the fixed items for an entry all written on the first line, and then as much description text as we need. The actual markup would be closely modeled on what we did for function-table entries.
Is this final change? I do not see any problem on this (progress monitoring) page in old layout. Is there any example of problematic page? Maybe there's a different way to solve this. For example instead of in-lining long text as a column description, it should be possible to link to detailed description in custom paragraph or table. See description column at table 27.22. at progress monitoring page for column "phase" for similar approach.
