Collection::createIndex
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Collection::createIndex — Create collection index
Beschreibung
$index_name
, string $index_desc_json
): voidCreates an index on the collection.
An exception is thrown if an index with the same name already exists, or if index definition is not correctly formed.
Parameter-Liste
-
index_name
-
The name of the index that to create. This name must be a valid index name as accepted by the
CREATE INDEX
SQL query. -
index_desc_json
-
Definition of the index to create. It contains an array of IndexField objects, and each object describes a single document member to include in the index, and an optional string for the type of index that might be INDEX (default) or SPATIAL.
A single IndexField description consists of the following fields:
-
field
: string, the full document path to the document member or field to be indexed. -
type
: string, one of the supported SQL column types to map the field into. For numeric types, the optional UNSIGNED keyword may follow. For the TEXT type, the length to consider for indexing may be added. -
required
: bool, (optional) true if the field is required to exist in the document. Defaults tofalse
, except forGEOJSON
where it defaults totrue
. -
options
: integer, (optional) special option flags for use when decodingGEOJSON
data. -
srid
: integer, (optional) srid value for use when decodingGEOJSON
data.
It is an error to include other fields not described above in IndexDefinition or IndexField documents.
-
Rückgabewerte
Beispiele
Beispiel #1 mysql_xdevapi\Collection::createIndex() example
<?php
$session = mysql_xdevapi\getSession("mysqlx://user:password@localhost");
$session->sql("DROP DATABASE IF EXISTS addressbook")->execute();
$session->sql("CREATE DATABASE addressbook")->execute();
$schema = $session->getSchema("addressbook");
$collection = $schema->createCollection("people");
// Creating a text index
$collection->createIndex(
'myindex1',
'{"fields": [{
"field": "$.name",
"type": "TEXT(25)",
"required": true}],
"unique": false}'
);
// A spatial index
$collection->createIndex(
'myindex2',
'{"fields": [{
"field": "$.home",
"type": "GEOJSON",
"required": true}],
"type": "SPATIAL"}'
);
// Index with multiple fields
$collection->createIndex(
'myindex3',
'{"fields": [
{
"field": "$.name",
"type": "TEXT(20)",
"required": true
},
{
"field": "$.age",
"type": "INTEGER"
},
{
"field": "$.job",
"type": "TEXT(30)",
"required": false
}
],
"unique": true
}'
);