Deleting documents is only supported for the following table types:

• Real-time tables,
• Percolate tables,
• Distributed tables that only contain RT tables a local or remote agents.

You can delete existing documents from a table based on either their ID or certain conditions.

Also, bulk deletion is available to delete multiple documents.

DELETE FROM table WHERE where_condition

POST /delete -d '
    {
     "index": "test",
     "id": 1
    }'
POST /delete -d '
    {
        "index": "test",
        "query":
        {
            "match": { "*": "apple" }
        }
    }'

SELECT * FROM TEST;

DELETE FROM TEST WHERE MATCH ('dummy');

SELECT * FROM TEST;

POST /delete -d '
    {
        "index":"test",
        "query":
        {
            "match": { "*": "dummy" }
        }
    }'

$index->deleteDocuments(new Match('dummy','*'));

indexApi.delete({"index" : "products", "query": { "match": { "*": "dummy" }}})

res = await indexApi.delete({"index" : "products", "query": { "match": { "*": "dummy" }}});

DeleteDocumentRequest deleteRequest = new DeleteDocumentRequest();
query = new HashMap<String,Object>();
query.put("match",new HashMap<String,Object>(){{
    put("*","dummy");
}});
deleteRequest.index("products").setQuery(query);
indexApi.delete(deleteRequest);

Dictionary<string, Object> match = new Dictionary<string, Object>(); 
match.Add("*", "dummy");
Dictionary<string, Object> query = new Dictionary<string, Object>(); 
query.Add("match", match);
DeleteDocumentRequest deleteRequest = new DeleteDocumentRequest(index: "products", query: query);
indexApi.Delete(deleteRequest);

+------+------+-------------+------+
| id   | gid  | mva1        | mva2 |
+------+------+-------------+------+
|  100 | 1000 | 100,201     | 100  |
|  101 | 1001 | 101,202     | 101  |
|  102 | 1002 | 102,203     | 102  |
|  103 | 1003 | 103,204     | 103  |
|  104 | 1004 | 104,204,205 | 104  |
|  105 | 1005 | 105,206     | 105  |
|  106 | 1006 | 106,207     | 106  |
|  107 | 1007 | 107,208     | 107  |
+------+------+-------------+------+
8 rows in set (0.00 sec)

Query OK, 2 rows affected (0.00 sec)

+------+------+-------------+------+
| id   | gid  | mva1        | mva2 |
+------+------+-------------+------+
|  100 | 1000 | 100,201     | 100  |
|  101 | 1001 | 101,202     | 101  |
|  102 | 1002 | 102,203     | 102  |
|  103 | 1003 | 103,204     | 103  |
|  104 | 1004 | 104,204,205 | 104  |
|  105 | 1005 | 105,206     | 105  |
+------+------+-------------+------+
6 rows in set (0.00 sec)

    {
        "_index":"test",
        "deleted":2,
    }

Array(
    [_index] => test
    [deleted] => 2
)

{'deleted': 2, 'id': None, 'index': 'products', 'result': None}

{"_index":"products","deleted":2}

class DeleteResponse {
    index: products
    deleted: 2
    id: null
    result: null
}

class DeleteResponse {
    index: products
    deleted: 2
    id: null
    result: null
}

DELETE FROM TEST WHERE id=100;

SELECT * FROM TEST;

POST /delete -d '
    {
        "index":"test",
        "id": 100
    }'

$index->deleteDocument(100);

indexApi.delete({"index" : "products", "id" : 1})

res = await indexApi.delete({"index" : "products", "id" : 1});

DeleteDocumentRequest deleteRequest = new DeleteDocumentRequest();
deleteRequest.index("products").setId(1L);
indexApi.delete(deleteRequest);

DeleteDocumentRequest deleteRequest = new DeleteDocumentRequest(index: "products", id: 1);
indexApi.Delete(deleteRequest);

Query OK, 1 rows affected (0.00 sec)

+------+------+-------------+------+
| id   | gid  | mva1        | mva2 |
+------+------+-------------+------+
|  101 | 1001 | 101,202     | 101  |
|  102 | 1002 | 102,203     | 102  |
|  103 | 1003 | 103,204     | 103  |
|  104 | 1004 | 104,204,205 | 104  |
|  105 | 1005 | 105,206     | 105  |
+------+------+-------------+------+
5 rows in set (0.00 sec)

    {
        "_index":"test",
        "_id":100,
        "found":true,
        "result":"deleted"      
    }

Array(
    [_index] => test
    [_id] => 100
    [found] => true
    [result] => deleted
)

{'deleted': None, 'id': 1, 'index': 'products', 'result': 'deleted'}

{"_index":"products","_id":1,"result":"deleted"}

class DeleteResponse {
    index: products
    _id: 1
    result: deleted
}

class DeleteResponse {
    index: products
    _id: 1
    result: deleted
}

DELETE FROM TEST WHERE MATCH ('dummy') AND ( mva1>206 or mva1 in (100, 103) );

SELECT * FROM TEST;

Query OK, 4 rows affected (0.00 sec)

+------+------+-------------+------+
| id   | gid  | mva1        | mva2 |
+------+------+-------------+------+
|  101 | 1001 | 101,202     | 101  |
|  102 | 1002 | 102,203     | 102  |
|  104 | 1004 | 104,204,205 | 104  |
|  105 | 1005 | 105,206     | 105  |
+------+------+-------------+------+
6 rows in set (0.00 sec)

delete from cluster:test where id=100;

POST /delete -d '
    {
      "cluster":"cluster",
      "index":"test",
      "id": 100
    }'

$index->setCluster('cluster');
$index->deleteDocument(100);

indexApi.delete({"cluster":"cluster","index" : "products", "id" : 100})

indexApi.delete({"cluster":"cluster","index" : "products", "id" : 100})

DeleteDocumentRequest deleteRequest = new DeleteDocumentRequest();
deleteRequest.cluster("cluster").index("products").setId(100L);
indexApi.delete(deleteRequest);

DeleteDocumentRequest deleteRequest = new DeleteDocumentRequest(index: "products", cluster: "cluster", id: 100);
indexApi.Delete(deleteRequest);

Array(
    [_index] => test
    [_id] => 100
    [found] => true
    [result] => deleted
)

{'deleted': None, 'id': 100, 'index': 'products', 'result': 'deleted'}

{"_index":"products","_id":100,"result":"deleted"}

class DeleteResponse {
    index: products
    _id: 100
    result: deleted
}

class DeleteResponse {
    index: products
    _id: 100
    result: deleted
}

POST /bulk

{ "delete" : { "index" : "products", "id" : 1 } }
{ "delete" : { "index" : "products", "query": { "equals": { "price" : 20 } } } }

$client->bulk([
    ['delete' => [
            'index' => 'products',
            'id' => 1
        ]
    ],
    ['delete'=>[
            'index' => 'products',
            'query' => [
                'equals' => ['price' => 20]
            ]
        ]
    ]
]);

docs = [ \
            { "delete" : { "index" : "products", "id": 1 } }, \
            { "delete" : { "index" : "products", "query": { "equals": { "price": 20 } } } } ]
indexApi.bulk('\n'.join(map(json.dumps,docs)))

docs = [
            { "delete" : { "index" : "products", "id": 1 } },
            { "delete" : { "index" : "products", "query": { "equals": { "price": 20 } } } } ];
res =  await indexApi.bulk(docs.map(e=>JSON.stringify(e)).join('\n'));

String   body = "{ "delete" : { "index" : "products", "id": 1 } } "+"\n"+
    "{ "delete" : { "index" : "products", "query": { "equals": { "price": 20 } } } }"+"\n";         
indexApi.bulk(body);

string   body = "{ "delete" : { "index" : "products", "id": 1 } } "+"\n"+
    "{ "delete" : { "index" : "products", "query": { "equals": { "price": 20 } } } }"+"\n";         
indexApi.Bulk(body);

{
   "items":
   [
      {
         "bulk":
         {
            "_index":"products",
            "_id":0,
            "created":0,
            "deleted":2,
            "updated":0,
            "result":"created",
            "status":201
         }
      }
   ],
   "errors":false
}

Array(
    [items] => Array
        (
            [0] => Array
                (
                    [bulk] => Array
                        (
                            [_index] => test
                            [_id] => 0
                            [created] => 0
                            [deleted] => 2
                            [updated] => 0
                            [result] => created
                            [status] => 201
                        )

                )

        )

    [current_line] => 3
    [skipped_lines] => 0
    [errors] => 
    [error] => 
)

{
    'error': None,
    'items': [{u'delete': {u'_index': u'products', u'deleted': 2}}]
}

{"items":[{"delete":{"_index":"products","deleted":2}}],"errors":false}

class BulkResponse {
    items: [{delete={_index=products, _id=0, created=false, deleted=2, result=created, status=200}}]
    error: null
    additionalProperties: {errors=false}
}

class BulkResponse {
    items: [{replace={_index=products, _id=0, created=false, deleted=2, result=created, status=200}}]
    error: null
    additionalProperties: {errors=false}
}

Manticore supports basic transactions for deleting and inserting data into real-time and percolate tables. Each change to a table is first saved in an internal changeset and then actually committed to the table. By default, each command is wrapped in an individual automatic transaction, making it transparent: you simply 'insert' something and can see the inserted result after it completes, without worrying about transactions. However, this behavior can be explicitly managed by starting and committing transactions manually.

Transactions are supported for the following commands:

• INSERT
• REPLACE
• DELETE

Transactions are not supported for:

• UPDATE (which is different from REPLACE, as it performs an in-place attribute update)
• ALTER - for updating table schema
• TRUNCATE - for emptying a real-time table
• ATTACH - for attaching a plain table to a real-time table
• CREATE - for creating a table
• DROP - for deleting a table

Please note that transactions in Manticore do not aim to provide isolation. The purpose of transactions in Manticore is to allow you to accumulate multiple writes and execute them all at once upon commit, or to roll them all back if necessary. Transactions are integrated with binary log for durability and consistency.

SET AUTOCOMMIT = {0 | 1}

SET AUTOCOMMIT controls the autocommit mode in the active session. AUTOCOMMIT is set to 1 by default. With the default setting, you don't have to worry about transactions, as every statement that makes any changes to any table is implicitly wrapped in a separate transaction. Setting it to 0 allows you to manage transactions manually, meaning they will not be visible until you explicitly commit them.

Transactions are limited to a single real-time or percolate table and are also limited in size. They are atomic, consistent, overly isolated, and durable. Overly isolated means that the changes are not only invisible to concurrent transactions but even to the current session itself.

START TRANSACTION | BEGIN
COMMIT
ROLLBACK

The BEGIN statement (or its START TRANSACTION alias) forcibly commits any pending transaction, if present, and starts a new one.

The COMMIT statement commits the current transaction, making all its changes permanent.

The ROLLBACK statement rolls back the current transaction, canceling all its changes.

When using one of the /bulk JSON endpoints ( bulk insert, bulk replace, bulk delete ), you can force a batch of documents to be committed by adding an empty line after them.

insert into indexrt (id, content, title, channel_id, published) values (1, 'aa', 'blabla', 1, 10);
Query OK, 1 rows affected (0.00 sec)

select * from indexrt where id=1;
+------+------------+-----------+--------+
| id   | channel_id | published | title  |
+------+------------+-----------+--------+
|    1 |          1 |        10 | blabla |
+------+------------+-----------+--------+
1 row in set (0.00 sec)

The inserted value is immediately visible in the following 'select' statement.

set autocommit=0;
Query OK, 0 rows affected (0.00 sec)

insert into indexrt (id, content, title, channel_id, published) values (3, 'aa', 'bb', 1, 1);
Query OK, 1 row affected (0.00 sec)

insert into indexrt (id, content, title, channel_id, published) values (4, 'aa', 'bb', 1, 1);
Query OK, 1 row affected (0.00 sec)

select * from indexrt where id=3;
Empty set (0.01 sec)

select * from indexrt where id=4;
Empty set (0.00 sec)

In this case, changes are NOT automatically committed. As a result, the insertions are not visible, even in the same session, since they have not been committed. Also, despite the absence of a BEGIN statement, a transaction is implicitly started.

To make the changes visible, you need to commit the transaction:

commit;
Query OK, 0 rows affected (0.00 sec)

select * from indexrt where id=4;
+------+------------+-----------+-------+
| id   | channel_id | published | title |
+------+------------+-----------+-------+
|    4 |          1 |         1 | bb    |
+------+------------+-----------+-------+
1 row in set (0.00 sec)

select * from indexrt where id=3;
+------+------------+-----------+-------+
| id   | channel_id | published | title |
+------+------------+-----------+-------+
|    3 |          1 |         1 | bb    |
+------+------------+-----------+-------+
1 row in set (0.00 sec)

After the commit statement, the insertions are visible in the table.

By using BEGIN and COMMIT, you can define the bounds of a transaction explicitly, so there's no need to worry about autocommit in this case.

begin;
Query OK, 0 rows affected (0.00 sec)

insert into indexrt (id, content, title, channel_id, published) values (2, 'aa', 'bb', 1, 1);
Query OK, 1 row affected (0.00 sec)

select * from indexrt where id=2;
Empty set (0.01 sec)

commit;
Query OK, 0 rows affected (0.01 sec)

select * from indexrt where id=2;
+------+------------+-----------+-------+
| id   | channel_id | published | title |
+------+------------+-----------+-------+
|    2 |          1 |         1 | bb    |
+------+------------+-----------+-------+
1 row in set (0.01 sec)