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|
#!/usr/bin/perl
#
# Generate the keywords table for the documentation's SQL Key Words appendix
#
# Copyright (c) 2019-2022, PostgreSQL Global Development Group
use strict;
use warnings;
my @sql_versions = reverse sort ('1992', '2011', '2016');
my $srcdir = $ARGV[0];
my %keywords;
my %as_keywords;
# read SQL-spec keywords
foreach my $ver (@sql_versions)
{
foreach my $res ('reserved', 'nonreserved')
{
foreach my $file (glob "$srcdir/keywords/sql${ver}*-${res}.txt")
{
open my $fh, '<', $file or die;
while (<$fh>)
{
chomp;
$keywords{$_}{$ver}{$res} = 1;
}
close $fh;
}
}
}
# read PostgreSQL keywords
open my $fh, '<', "$srcdir/../../../src/include/parser/kwlist.h" or die;
while (<$fh>)
{
if (/^PG_KEYWORD\("(\w+)", \w+, (\w+)_KEYWORD\, (\w+)\)/)
{
$keywords{ uc $1 }{'pg'}{ lc $2 } = 1;
$as_keywords{ uc $1 } = 1 if $3 eq 'AS_LABEL';
}
}
close $fh;
# print output
print "<!-- autogenerated, do not edit -->\n";
print <<END;
<table id="keywords-table">
<title><acronym>SQL</acronym> Key Words</title>
<tgroup cols="5">
<colspec colname="col1" colwidth="5*"/>
<colspec colname="col2" colwidth="3*"/>
<colspec colname="col3" colwidth="2*"/>
<colspec colname="col4" colwidth="2*"/>
<colspec colname="col5" colwidth="2*"/>
<thead>
<row>
<entry>Key Word</entry>
<entry><productname>PostgreSQL</productname></entry>
END
foreach my $ver (@sql_versions)
{
my $s = ($ver eq '1992' ? 'SQL-92' : "SQL:$ver");
print " <entry>$s</entry>\n";
}
print <<END;
</row>
</thead>
<tbody>
END
foreach my $word (sort keys %keywords)
{
# Insert zwsp's into very long keywords, so that they can be broken
# into multiple lines in PDF format (or narrow HTML windows).
my $printword = $word;
$printword =~ s/_/_&zwsp;/g if (length($printword) > 20);
print " <row>\n";
print " <entry><token>$printword</token></entry>\n";
print " <entry>";
if ($keywords{$word}{pg}{'unreserved'})
{
print "non-reserved";
}
elsif ($keywords{$word}{pg}{'col_name'})
{
print "non-reserved (cannot be function or type)";
}
elsif ($keywords{$word}{pg}{'type_func_name'})
{
print "reserved (can be function or type)";
}
elsif ($keywords{$word}{pg}{'reserved'})
{
print "reserved";
}
if ($as_keywords{$word})
{
print ", requires <literal>AS</literal>";
}
print "</entry>\n";
foreach my $ver (@sql_versions)
{
print " <entry>";
if ($keywords{$word}{$ver}{'reserved'})
{
print "reserved";
}
elsif ($keywords{$word}{$ver}{'nonreserved'})
{
print "non-reserved";
}
print "</entry>\n";
}
print " </row>\n";
}
print <<END;
</tbody>
</tgroup>
</table>
END
|
