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package Catmandu::Store::DBI::Handler::Pg;
use Catmandu::Sane;
use DBD::Pg ();
use Moo;
use namespace::clean;
our $VERSION = "0.0702";
with 'Catmandu::Store::DBI::Handler';
sub _column_sql {
my ($self, $map, $bag) = @_;
my $col = $map->{column};
my $dbh = $bag->store->dbh;
my $sql = $dbh->quote_identifier($col) . " ";
if ($map->{type} eq 'string') {
$sql .= 'TEXT';
}
elsif ($map->{type} eq 'integer') {
$sql .= 'INTEGER';
}
elsif ($map->{type} eq 'binary') {
$sql .= 'BYTEA';
}
elsif ($map->{type} eq 'json') {
if ($dbh->{pg_server_version} < 90400) {
Catmandu::Error->throw(
"JSONB type only supported in PostgreSQL 9.4 and above");
}
$sql .= 'JSONB';
}
elsif ($map->{type} eq 'datetime') {
$sql .= 'TIMESTAMP(0)';
}
elsif ($map->{type} eq 'datetime_milli') {
$sql .= 'TIMESTAMP(3)';
}
else {
Catmandu::Error->throw("Unknown type '$map->{type}'");
}
if ($map->{array}) {
$sql .= '[]';
}
if ($map->{unique}) {
$sql .= " UNIQUE";
}
if ($map->{required}) {
$sql .= " NOT NULL";
}
$sql;
}
sub _create_index_sql {
my ($self, $bag, $map) = @_;
my $name = $bag->name;
my $col = $map->{column};
my $dbh = $bag->store->dbh;
my $q_col = $dbh->quote_identifier($col);
my $sql = <<SQL;
DO \$\$
BEGIN
IF NOT EXISTS (
SELECT 1
FROM pg_class c
JOIN pg_namespace n ON n.oid = c.relnamespace
WHERE c.relname = '${name}_${col}_idx'
AND n.nspname = 'public'
) THEN
CREATE INDEX ${name}_${col}_idx ON public.${name} (${q_col});
END IF;
END\$\$;
SQL
}
sub create_table {
my ($self, $bag) = @_;
my $mapping = $bag->mapping;
my $name = $bag->name;
my $dbh = $bag->store->dbh;
my $q_name = $dbh->quote_identifier($name);
my $sql
= "CREATE TABLE IF NOT EXISTS $q_name("
. join(',', map {$self->_column_sql($_, $bag)} values %$mapping)
. ");";
for my $map (values %$mapping) {
next if $map->{unique} || !$map->{index};
$sql .= $self->_create_index_sql($bag, $map);
}
local $SIG{__WARN__} = sub {
my $msg = $_[0];
if ($msg !~ /^NOTICE: relation "$name" already exists/) {
warn $msg;
}
};
$dbh->do($sql) or Catmandu::Error->throw($dbh->errstr);
}
# see
# http://stackoverflow.com/questions/15840922/where-not-exists-in-postgresql-gives-syntax-error
# and
# https://rt.cpan.org/Public/Bug/Display.html?id=13180
sub add_row {
my ($self, $bag, $row) = @_;
my $mapping = $bag->mapping;
my $dbh = $bag->store->dbh;
my $id_col = $mapping->{_id}{column};
my $q_id_col = $dbh->quote_identifier($id_col);
my %binary_cols;
my %json_cols;
for my $map (values %$mapping) {
if ($map->{type} eq 'binary') {
$binary_cols{$map->{column}} = 1;
}
elsif ($map->{type} eq 'json') {
$json_cols{$map->{column}} = 1;
}
}
my $id = $row->{$id_col};
my @cols = keys %$row;
my @q_cols = map {$dbh->quote_identifier($_)} @cols;
my @vals = values %$row;
my $name = $bag->name;
my $q_name = $dbh->quote_identifier($name);
my $insert_sql
= "INSERT INTO $q_name("
. join(',', @q_cols)
. ") SELECT "
. join(',', ('?') x @cols)
. " WHERE NOT EXISTS (SELECT 1 FROM $q_name WHERE $q_id_col=?)";
my $update_sql
= "UPDATE $q_name SET "
. join(',', map {"$_=?"} @q_cols)
. " WHERE $q_id_col=?";
my $sth = $dbh->prepare_cached($update_sql)
or Catmandu::Error->throw($dbh->errstr);
my $i = 0;
for (; $i < @cols; $i++) {
my $col = $cols[$i];
my $val = $vals[$i];
if ($binary_cols{$col}) {
$sth->bind_param($i + 1, $val, {pg_type => DBD::Pg->PG_BYTEA});
}
elsif ($json_cols{$col}) {
$sth->bind_param($i + 1, $val, {pg_type => DBD::Pg->PG_JSONB});
}
else {
$sth->bind_param($i + 1, $val);
}
}
$sth->bind_param($i + 1, $id);
$sth->execute or Catmandu::Error->throw($sth->errstr);
unless ($sth->rows) {
$sth->finish;
$sth = $dbh->prepare_cached($insert_sql)
or Catmandu::Error->throw($dbh->errstr);
my $i = 0;
for (; $i < @cols; $i++) {
my $col = $cols[$i];
my $val = $vals[$i];
if ($binary_cols{$col}) {
$sth->bind_param($i + 1, $val,
{pg_type => DBD::Pg->PG_BYTEA});
}
elsif ($json_cols{$col}) {
$sth->bind_param($i + 1, $val,
{pg_type => DBD::Pg->PG_JSONB});
}
else {
$sth->bind_param($i + 1, $val);
}
}
$sth->bind_param($i + 1, $id);
$sth->execute or Catmandu::Error->throw($sth->errstr);
}
$sth->finish;
}
1;
|
