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Further code review for genbki.pl. Improve comments, fix some 

rather random code choices, don't slavishly duplicate the original
pg_attribute.h's failure to put an OID into Schema_pg_index entries.
This commit is contained in:
Tom Lane 2010-01-05 06:41:44 +00:00
parent daf5b0f297
commit 5219f80312
1 changed files with 32 additions and 27 deletions
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59
src/backend/catalog/genbki.pl
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@ -10,7 +10,7 @@
# Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
# Portions Copyright (c) 1994, Regents of the University of California
#
# $PostgreSQL: pgsql/src/backend/catalog/genbki.pl,v 1.2 2010/01/05 02:34:03 tgl Exp $
# $PostgreSQL: pgsql/src/backend/catalog/genbki.pl,v 1.3 2010/01/05 06:41:44 tgl Exp $
#
#----------------------------------------------------------------------
@ -146,7 +146,7 @@ foreach my $catname ( @{ $catalogs->{names} } )
my $oid = $row->{oid} ? "OID = $row->{oid} " : '';
printf BKI "insert %s( %s)\n", $oid, $row->{bki_values};
# Write values to postgres.description and postgres.shdescription
# Write comments to postgres.description and postgres.shdescription
if (defined $row->{descr})
{
printf DESCR "%s\t%s\t0\t%s\n", $row->{oid}, $catname, $row->{descr};
@ -166,15 +166,15 @@ foreach my $catname ( @{ $catalogs->{names} } )
{
my $table = $catalogs->{$table_name};
# Build Schema_pg_xxx macros needed by relcache.c.
# Currently, all bootstrapped relations also need schemapg.h
# entries, so skip if the relation isn't to be in schemapg.h.
next if $table->{schema_macro} ne 'True';
$schemapg_entries{$table_name} = [];
push @tables_needing_macros, $table_name;
my $is_bootstrap = $table->{bootstrap};
# Both postgres.bki and schemapg.h have entries corresponding
# to user attributes
# Generate entries for user attributes.
my $attnum = 0;
my @user_attrs = @{ $table->{columns} };
foreach my $attr (@user_attrs)
@ -184,21 +184,20 @@ foreach my $catname ( @{ $catalogs->{names} } )
$row->{attnum} = $attnum;
$row->{attstattarget} = '-1';
# Of these tables, only bootstrapped ones
# have data declarations in postgres.bki
# If it's bootstrapped, put an entry in postgres.bki.
if ($is_bootstrap eq ' bootstrap')
{
bki_insert($row, @attnames);
}
# Store schemapg entries for later
# Store schemapg entries for later.
$row = emit_schemapg_row($row, grep { $bki_attr{$_} eq 'bool' } @attnames);
push @{ $schemapg_entries{$table_name} },
'{ ' . join(', ', map $row->{$_}, @attnames) . ' }';
}
# Only postgres.bki has entries corresponding to system
# attributes, so only bootstrapped relations here
# Generate entries for system attributes.
# We only need postgres.bki entries, not schemapg.h entries.
if ($is_bootstrap eq ' bootstrap')
{
$attnum = 0;
@ -215,12 +214,13 @@ foreach my $catname ( @{ $catalogs->{names} } )
{
$attnum--;
my $row = emit_pgattr_row($table_name, $attr);
# pg_attribute has no oids -- skip
next if $table_name eq 'pg_attribute' && $row->{attname} eq 'oid';
$row->{attnum} = $attnum;
$row->{attstattarget} = '0';
# some catalogs don't have oids
next if $table->{without_oids} eq ' without_oids' &&
$row->{attname} eq 'oid';
bki_insert($row, @attnames);
}
}
@ -299,8 +299,8 @@ exit 0;
# Given a system catalog name and a reference to a key-value pair corresponding
# to the name and type of a column, generate a reference to a pg_attribute
# entry
# to the name and type of a column, generate a reference to a hash that
# represents a pg_attribute entry
sub emit_pgattr_row
{
my ($table_name, $attr) = @_;
@ -317,7 +317,7 @@ sub emit_pgattr_row
$atttype = '_' . $1;
}
# Copy the type data from pg_type, with minor modifications:
# Copy the type data from pg_type, and add some type-dependent items
foreach my $type (@types)
{
if ( defined $type->{typname} && $type->{typname} eq $atttype )
@ -327,8 +327,17 @@ sub emit_pgattr_row
$row{attbyval} = $type->{typbyval};
$row{attstorage} = $type->{typstorage};
$row{attalign} = $type->{typalign};
# set attndims if it's an array type
$row{attndims} = $type->{typcategory} eq 'A' ? '1' : '0';
$row{attnotnull} = $type->{typstorage} eq 'x' ? 'f' : 't';
# This approach to attnotnull is not really good enough;
# we need to know about prior column types too. Look at
# DefineAttr in bootstrap.c. For the moment it's okay for
# the column orders appearing in bootstrapped catalogs.
$row{attnotnull} =
$type->{typname} eq 'oidvector' ? 't'
: $type->{typname} eq 'int2vector' ? 't'
: $type->{typlen} eq 'NAMEDATALEN' ? 't'
: $type->{typlen} > 0 ? 't' : 'f';
last;
}
}
@ -357,25 +366,21 @@ sub bki_insert
printf BKI "insert %s( %s)\n", $oid, $bki_values;
}
# The values of a Schema_pg_xxx declaration are similar, but not
# quite identical, to the corresponding values in pg_attribute.
# The field values of a Schema_pg_xxx declaration are similar, but not
# quite identical, to the corresponding values in postgres.bki.
sub emit_schemapg_row
{
my $row = shift;
my @bool_attrs = @_;
# pg_index has attrelid = 0 in schemapg.h
if ($row->{attrelid} eq '2610')
{
$row->{attrelid} = '0';
}
# Supply appropriate quoting for these fields.
$row->{attname} = q|{"| . $row->{attname} . q|"}|;
$row->{attstorage} = q|'| . $row->{attstorage} . q|'|;
$row->{attalign} = q|'| . $row->{attalign} . q|'|;
$row->{attacl} = q|{ 0 }|;
# Expand booleans, accounting for FLOAT4PASSBYVAL etc.
# Expand booleans from 'f'/'t' to 'false'/'true'.
# Some values might be other macros (eg FLOAT4PASSBYVAL), don't change.
foreach my $attr (@bool_attrs)
{
$row->{$attr} =