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.\" ========================================================================
.\"
.IX Title "Tangram::Driver::Pg 3pm"
.TH Tangram::Driver::Pg 3pm "2022-10-16" "perl v5.34.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
Tangram::Driver::Pg \- Orthogonal Object Persistence in PostgreSQL databases
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 2
\&   use Tangram;
\&   use Tangram::Driver::Pg;
\&
\&   $schema = Tangram::Driver::Pg\->schema( $hashref );
\&
\&   Tangram::Driver::Pg\->deploy($schema, $dbh);
\&
\&   $storage = Tangram::Driver::Pg\->connect( $schema,
\&      $data_source, $username, $password );
\&
\&   $storage\->disconnect();
\&
\&   Tangram::Driver::Pg\->retreat($schema, $dbh);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This is the entry point in the Pg-specific object-relational
persistence backend.
.PP
This module performs the following:
.SH "METHODS"
.IX Header "METHODS"
This backend does not add any methods; for a description of
available methods, see Tangram::Relational.
.SH "ERRATA"
.IX Header "ERRATA"
Tangram::Type::Dump::Storable objects are first encoded with
MIME::Base64, because Tangram does not currently have an easy
mechanism for calling \f(CW\*(C`DBI\->bind_param()\*(C'\fR at the appropriate time
to flag the column as binary.
.PP
Tangram::Type::Dump::Perl objects are stored as \f(CW\*(C`BYTEA\*(C'\fR columns,
which as of DBD::Pg 1.31, also do not get correctly escaped by the
\&\s-1DBD\s0 driver.  This also affects the (as-yet not fully functional)
Tangram::Type::Dump::YAML back-end, which might put \f(CW\*(C`\e\*(C'\fR characters
into a \s-1YAML\s0 document.
.PP
It is recommended to use the \f(CW\*(C`storable\*(C'\fR type with
Tangram::Type::Dump::Any for this reason.