The BLOB data stored value column of Yii Cache Table looks like this (if we use CDbCache).
a:2:{i:0;O:17:"CMysqlTableSchema":9:
{s:10:"schemaName";N;s:4:"name";s:13:"yii_table_log";s:7:"rawName";s:15:"yii_table_log";s:10:"primaryKey";s:2:"id";s:12:"sequenceName";s:0:"";s:11:"foreignKeys";
a:0:{}s:7:"columns";
a:11:
{s:2:"id";O:18:"CMysqlColumnSchema":15:{s:4:"name";s:2:"id";s:7:"rawName";s:4:"id";s:9:"allowNull";b:0;s:6:"dbType";s:10:"bigint(20)";s:4:"type";s:6:"string";s:12:"defaultValue";N;s:4:"size";i:20;s:9:"precision";i:20;s:5:"scale";N;s:12:"isPrimaryKey";b:1;s:12:"isForeignKey";b:0;s:13:"autoIncrement";b:1;s:7:"comment";s:0:"";s:14:" CComponent _e";N;s:14:" CComponent _m";N;}
s:10:"log_action";
O:18:"CMysqlColumnSchema":15:{s:4:"name";s:10:"log_action";s:7:"rawName";s:12:"log_action";s:9:"allowNull";b:1;s:6:"dbType";s:10:"tinyint(4)";s:4:"type";s:7:"integer";s:12:"defaultValue";N;s:4:"size";i:4;s:9:"precision";i:4;s:5:"scale";N;s:12:"isPrimaryKey";b:0;s:12:"isForeignKey";b:0;s:13:"autoIncrement";b:0;s:7:"comment";s:0:"";s:14:" CComponent _e";N;s:14:" CComponent _m";N;}
Can someone explain how this serialized schema data is used in caching?