.. _sql_ddl:

========================
Data Definition in Crate
========================

Currently Crate doesn't support any DDL SQL Statements.  Meanwhile it is
possible to create tables using the `HTTP REST` interface.

.. note::

    This will be deprecated as soon as the DDL statements are available.

In order to create a table simply call the `<servername:port>/<tablename>`
endpoint using a `PUT` request. In the body should be the schema definition in
`JSON` format::

    sh$ curl -sSX PUT 'localhost:9200/ships?pretty' -d @- <<EOF
    ... {
    ... "mappings" : {
    ...  "default": {
    ...   "_meta": {
    ...     "primary_keys": "id"
    ...   },
    ...   "properties": {
    ...     "id": {
    ...       "type": "string",
    ...       "index": "not_analyzed"
    ...     },
    ...     "name": {
    ...       "type": "string",
    ...       "index": "not_analyzed"
    ...     },
    ...     "description": {
    ...      "type": "string"
    ... }}}}}
    ... EOF
    {
      "ok" : true,
      "acknowledged" : true
    }

Currently primary key's cannot be auto generated and have to be specified if
data is inserted, otherwise an error is returned.

.. note::

    Multi-column primary keys are currently not supported.
