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Initial implementation of getColumnInfo() for MySQL

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This commit is contained in:
Kijin Sung 2014-08-10 21:10:52 +09:00
parent 4d1daeb2d7
commit 3335942980
1 changed files with 55 additions and 0 deletions
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55
classes/db/DBMysql.class.php
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@ -370,6 +370,61 @@ class DBMysql extends DB
return false;
}
/**
* Get information about a column
* @param string $table_name table name
* @param string $column_name column name
* @return object
*/
function getColumnInfo($table_name, $column_name)
{
$query = sprintf("show fields from `%s%s` where `Field` = '%s'", $this->prefix, $table_name, $column_name);
$result = $this->_query($query);
if($this->isError())
{
return;
}
$output = $this->_fetch($result);
if($output)
{
$dbtype = $output->{'Type'};
if($xetype = array_search($dbtype, $this->column_type))
{
$size = null;
}
elseif(strpos($dbtype, '(') !== false)
{
list($dbtype, $size) = explode('(', $dbtype, 2);
$size = intval(rtrim($size, ')'));
if($xetype = array_search($dbtype, $this->column_type))
{
// no-op
}
else
{
$xetype = $dbtype;
}
}
else
{
$xetype = $dbtype;
$size = null;
}
return (object)array(
'name' => $output->{'Field'},
'dbtype' => $dbtype,
'xetype' => $xetype,
'size' => $size,
'default_value' => $output->{'Default'},
'notnull' => strncmp($output->{'Null'}, 'NO', 2) == 0 ? true : false,
);
}
else
{
return false;
}
}
/**
* Add an index to the table
* $target_columns = array(col1, col2)