- rename class to ColumnSchemaBuilder as this is more appropriate
- changed internal organisation to match how the rest of schema related classes work
- the ColumnSchemaBuilder is now created the same way as QueryBuilder is
- removed static call magic and method annotations, now real methods are called as they are
- the whole code works on objects in a db context now instead of setting database connection in global state
- trait is now used by Migration by default but can be used in other contexts as well
Migration usage is now as follows:
```php
$this->createTable('example_table', [
'id' => $this->primaryKey(),
'name' => $this->string(64)->notNull(),
'type' => $this->integer()->notNull()->defaultValue(10),
'description' => $this->text(),
'rule_name' => $this->string(64),
'data' => $this->text(),
'created_at' => $this->datetime()->notNull(),
'updated_at' => $this->datetime(),
]);
```
added test to check support for setting PDO::ATTR_CASE and fetching table schemas
fixed fetching table schemas for mysql when PDO::ATTR_CASE is set
added tests for oci
fixed fetching composite fks for oci
improvements in oci schema parsing
removed autoIncrement detection fro oci and added test to verify that
implement batchInsert for oci
fix detecting IntegrityException for oci
fixed creating raw sql by skipping object and resource params
fix command test failing for sqlite
Schema name was not used in ’SHOW CREATE TABLE’ query
Fixed bug where schema name was not used in ’SHOW CREATE TABLE’ query in `yii\db\mysql\Schema`
close#4162
