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.\" ========================================================================
.\"
.IX Title "Pg::hstore 3pm"
.TH Pg::hstore 3pm "2018-11-01" "perl v5.28.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.SH "NAME"
Pg::hstore \- Perl extension for encoding/decoding postgresql's hstore data type.
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 5
\&  use Pg::hstore;
\&  ...
\&  my $row = $sth\->fetchrow_hashref;   #Getting row from DB
\&  print "hstore data: ", $row\->{addinfo}, "\en";
\&  my $addinfo = Pg::hstore::decode($row\->{addinfo});   #Decoding into perl hashref
\&
\&  #now $addinfo is 1\-level hash ref with key\->value
\&  print "addinfo\->\*(Aqfull_name\*(Aq = ", $addinfo\->{full_name}, "\en";
\&
\&  ...
\&  #Updating hstore. This type of updating can wipe other process work on addinfo field
\&  $addinfo\->{full_name} = "John the ripper";
\&  $dbh\->do("update users set addinfo=? where id=?", undef,
\&     Pg::hstore::encode($addinfo), 123);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
.SS "decode(string)"
.IX Subsection "decode(string)"
Decode given \s-1HSTORE\s0 value. \s-1NULL\s0 values will be converted to Perl undef; \s-1NULL\s0 or empty keys will be ignored.
Returns hash ref with key => value pairs. Can return undef on internal error.
Keys and values will have same \s-1UTF8\s0 flag as incoming string.
.SS "encode(hashref)"
.IX Subsection "encode(hashref)"
Encodes given hash ref to HSTORE-format string. undef values will be converted to \s-1NULL.\s0 Empty or undef keys will be ignored.
Returns hstore-serialized string. Can return undef on internal error.
String will have \s-1UTF8\s0 flag \s-1ON\s0 if any of hashref values have it.
.SH "EXPORT"
.IX Header "EXPORT"
None by default.
Can export \fBhstore_encode\fR and \fBhstore_decode\fR subs:
.PP
.Vb 1
\& use Pg::hstore qw/hstore_encode hstore_decode/;
.Ve
.SH "BUGS"
.IX Header "BUGS"
None known.
Feel free to clone/contribue from https://bitbucket.org/PSIAlt/p5\-pg\-hstore
.SH "COPYRIGHT AND LICENSE"
.IX Header "COPYRIGHT AND LICENSE"
Copyright (C) 2011 by Alt
.PP
.Vb 6
\& \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-
\& "THE BEER\-WARE LICENSE"
\& As long as you retain this notice you can do whatever you want with this stuff.
\& If we meet some day, and you think this stuff is worth it, you can buy me a beer
\& in return.
\& \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-
.Ve