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.\" ========================================================================
.\"
.IX Title "Alzabo::Create::ColumnDefinition 3pm"
.TH Alzabo::Create::ColumnDefinition 3pm "2022-06-14" "perl v5.34.0" "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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.nh
.SH "NAME"
Alzabo::Create::ColumnDefinition \- Column definition object for schema
creation
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  use Alzabo::Create::ColumnDefinition;
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This object holds information on a column that might need to be shared
with another column.  The reason this class exists is that if a column
is a key in two or more tables, then some of the information related
to that column should change automatically in multiple places whenever
it changes at all.  Right now this is only type ('\s-1VARCHAR\s0', '\s-1NUMBER\s0',
etc) and length/precision information.  This object also has an
\&'owner', which is the column which created it.
.SH "INHERITS FROM"
.IX Header "INHERITS FROM"
\&\f(CW\*(C`Alzabo::ColumnDefinition\*(C'\fR
.PP
Note: all relevant documentation from the superclass has been merged into this document.
.SH "METHODS"
.IX Header "METHODS"
.SS "new"
.IX Subsection "new"
This method takes the following parameters:
.IP "\(bu" 4
owner => \f(CW\*(C`Alzabo::Create::ColumnDefinition\*(C'\fR object
.IP "\(bu" 4
type => \f(CW$type\fR
.PP
It returns a new \f(CW\*(C`Alzabo::Create::ColumnDefinition\*(C'\fR object.
.SS "alter"
.IX Subsection "alter"
See the \f(CW\*(C`Alzabo::Column\->alter()\*(C'\fR method
for details.
.SS "type"
.IX Subsection "type"
Returns the object's type as a string.
.SS "set_type ($string)"
.IX Subsection "set_type ($string)"
Sets the object's type.
.PP
Throws: \f(CW\*(C`Alzabo::Exception::Params\*(C'\fR,
\&\f(CW\*(C`Alzabo::Exception::RDBMSRules\*(C'\fR
.SS "length"
.IX Subsection "length"
Returns the length attribute of the column, or undef if there is none.
.SS "precision"
.IX Subsection "precision"
Returns the precision attribute of the column, or undef if there is
none.
.SS "set_length"
.IX Subsection "set_length"
This method takes the following parameters:
.IP "\(bu" 4
length => \f(CW$length\fR
.IP "\(bu" 4
precision => \f(CW$precision\fR (optional)
.PP
Sets the column's length and precision.  The precision parameter is
optional (though some column types may require it if the length is
set).
.PP
Throws: \f(CW\*(C`Alzabo::Exception::Params\*(C'\fR,
\&\f(CW\*(C`Alzabo::Exception::RDBMSRules\*(C'\fR
.SS "owner"
.IX Subsection "owner"
Returns the \f(CW\*(C`Alzabo::Create::Column\*(C'\fR object that owns this
definitions (the column that created it).