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Class: QueryDataSource
[ AMD Module Require | Legacy Module Require ]
dojo.require("esri.layers.QueryDataSource")
Description
(Added at v2.7)
The QueryDataSource class defines and provides information about a layer or table that is defined by a SQL query. The geometry storage format determines the capabilities of the QueryDataSource. If the data source stores the geometry in the database native format the return value is a layer that supports all operations supported by a dynamic layer. If the data source stores geometry in a non-native format the result is a table that can be used to perform query operations.
See also
Samples
Search for samples that use this class.Class hierarchy
esri/layers.DataSource |_esri/layers.QueryDataSource
Constructors
| Name | Summary |
|---|---|
| new esri.layers.QueryDataSource(json?) | Creates a new QueryDataSource object. |
Properties
| Name | Type | Summary |
|---|---|---|
| geometryType | String | The geometry type of the data source. |
| oidFields | String[] | An array of field names that define a unique identifier for the feature. |
| query | String | The SQL query string that defines the data source output. |
| spatialReference | SpatialReference | The spatial reference for the data source. |
| workspaceId | String | The workspace id for the registered file geodatabase, SDE or Shapefile workspace. |
Methods
| Name | Return type | Summary |
|---|---|---|
| toJson() | Object | Converts object to its ArcGIS Server JSON representation. |
Constructor Details
Creates a new QueryDataSource object.
Parameters:
< |
Optional | JSON object representing the QueryDataSource. |
Sample:
var dataSource = new esri.layers.QueryDataSource();
Property Details
<String
StringThe geometry type of the data source. Required if the specified data source has a geometry column.
Known values:
'point' | 'multipoint' | 'line' | 'polygon'Sample:
dataSource.geometryType = "polygon";
<String[]
String[]An array of field names that define a unique identifier for the feature. The combiniation of one or more fields will be used to generate a unique identifier for the feature.
Sample:
dataSource.oidFields = ["TaxLotId"];
<String
StringThe SQL query string that defines the data source output.
Sample:
dataSource.query = "SELECT * FROM sde.sde.states_geom";
<SpatialReference
SpatialReferenceThe spatial reference for the data source. Required if the specified data source has a geometry column.
Sample:
dataSource.spatialReference = new esri.SpatialReference({
wkid: 4269
});
<String
StringThe workspace id for the registered file geodatabase, SDE or Shapefile workspace.
Sample:
dataSource.workspaceId = "d203_db";
Method Details