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.\" ========================================================================
.\"
.IX Title "Alzabo::PostgreSQL 3pm"
.TH Alzabo::PostgreSQL 3pm "2015-05-24" "perl v5.20.2" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
Alzabo::PostgreSQL \- Alzabo and PostgreSQL
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This documentation is about what special support Alzabo has for PostgreSQL,
as well as what is lacking.
.PP
Postgres support is based on the 7.3.x version of Postgres.  Alzabo
should work with the 7.1 and 7.2 series, and may even work with the
7.0 series.
.SS "Mixed-case Table or Column Names"
.IX Subsection "Mixed-case Table or Column Names"
By default, Postgres treats table and column names case-insensitively.
Because of this, Alzabo always quotes these names when generating \s-1DDL
SQL. \s0 If you are using tables or columns that contain upper-case
characters, you should always call \f(CW\*(C`$schema\->set_quote_identifiers(1)\*(C'\fR as soon as you load your schema
object.  Otherwise, any method which generates \s-1DML SQL\s0 will fail.
.SS "Reverse Engineering"
.IX Subsection "Reverse Engineering"
.IP "\(bu" 4
Alzabo cannot determine from the existence of a sequence that the
sequence is meant to be used for a particular column unless the
sequence was created as a result of making a column's type \s-1SERIAL.\s0
.Sp
This is because there is no link between the two in the Postgres' data
dictionary tables and will probably never change.
.SS "Transactions"
.IX Subsection "Transactions"
.IP "\(bu" 4
Transactions are fully supported with Postgres.
.SS "Outer joins"
.IX Subsection "Outer joins"
.IP "\(bu" 4
Left and right outer joins are supported.
.IP "\(bu" 4
Full outer joins are not supported.
.SS "Constraints"
.IX Subsection "Constraints"
Column constraints can be specified as column attributes.  Table
constraints can be specified as table attributes.
.PP
Foreign key constraints are generated automatically based on the
relationships defined by your schema.