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Restrict index size to 191 chars for utf8mb4 and 255 chars for utf8 (767 chars total)

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This commit is contained in:
Kijin Sung 2020-06-26 13:46:48 +09:00
parent 93e597989d
commit 93be42c477
3 changed files with 58 additions and 10 deletions
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23
common/framework/parsers/dbtable/table.php
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@ -28,12 +28,18 @@ class Table
// Add columns.
$columns = array();
$adjusted_sizes = array();
foreach ($this->columns as $column)
{
$columndef = ' `' . $column->name . '`' . ' ' . strtoupper($column->type);
$max_size = $column->utf8mb4 ? 191 : 255;
if (preg_match('/char/i', $column->type) && $column->size > $max_size && ($column->is_unique || $column->is_primary_key))
{
$adjusted_sizes[$column->name] = $max_size;
}
if ($column->size)
{
$columndef .= '(' . $column->size . ')';
$columndef .= '(' . (isset($adjusted_sizes[$column->name]) ? $adjusted_sizes[$column->name] : $column->size) . ')';
}
if ($column->utf8mb4 === false && $charset === 'utf8mb4')
{
@ -72,9 +78,18 @@ class Table
}
foreach ($this->indexes as $index)
{
$idxcolumns = array_map(function($str) {
return '`' . $str . '`';
}, $index->columns);
$idxcolumns = array();
foreach ($index->columns as $column_name => $prefix_size)
{
$column_info = $this->columns[$column_name];
$current_size = isset($adjusted_sizes[$column->name]) ? $adjusted_sizes[$column->name] : $column->size;
$max_size = $column_info->utf8mb4 ? 191 : 255;
if (preg_match('/char/i', $column->type) && $current_size > $max_size)
{
$prefix_size = $max_size;
}
$idxcolumns[] = '`' . $column_name . '`' . ($prefix_size > 0 ? "($prefix_size)" : '');
}
$idxtype = ($index->is_unique ? 'UNIQUE' : 'INDEX');
$idxdef = ' ' . $idxtype . ' `' . $index->name . '` (' . implode(', ', $idxcolumns) . ')';
$columns[] = $idxdef;