Table

Zusammenfassung

Provides access to basic table properties and methods.

Diskussion

There are two ways tables can be referenced in a script for use in a project. To reference tables already in a project, use the listTables method on the Map class. To reference tables directly from a workspace, use the Table function.

You may want to reference a table in a project using the listTables function, because you may need to change a table's data source or definition query, or even remove the table from the project using the removeTable method.

The Table function is useful for referencing new tables you want to add into a project. Once you have a reference to a new, external table source, you can add it to a Map using the addTable method.

A table can support zero to many definition queries, but only one definition query can be active. It is also possible that one or many definition queries are present but none are active. There are a couple of ways to manage definition queries. First, you can use the definitionQuery property. If you set a unique SQL string on a table that does not have a definition query or a table that has multiple definition queries, the new definition query is added and it becomes the active query. If you set a SQL string on a table that already has that same query, it sets that as the active definition query, if it is not already active. The second way to manage definition queries is to use the listDefinitionQueries and updateDefinitionQueries functions in combination. The listDefinitionQueries function returns a list of Python dictionaries that represent the properties associated with each query. The dictionary keys are name, sql, and isActive. Definition queries can be added, modified, or removed from the Python list using core Python. The dictionary isActive value can be set to True to set the active query. Again, only one query can be active. If you try setting more than one query to be active, an error will be returned. After changes are made, the updateDefinitionQueries function is used to set the new changes.

Changing a tables's data source is a common requirement. There is a method and a property on the Layer object that help with this. For a more detailed discussion, parameter information, scenarios, and code samples, refer to the Updating and fixing data sources help topic.

Eigenschaften

Eigenschaft	Erläuterung	Datentyp
connectionProperties (Schreibgeschützt)	Returns a table's data source connection information as a Python dictionary.	Dictionary
dataSource (Schreibgeschützt)	Returns the complete path for the table's data source. It includes the full workspace path and name of the dataset. For enterprise geodatabase tables, a string containing the table's connection information is returned. Tipp: Enterprise geodatabase tables in an ArcGIS Pro project do not retain the path to the database connection file (.sde) that was used to create the layer.	String
definitionQuery (Lesen und schreiben)	Provides the ability to get or set a tables's definition query.	String
isBroken (Schreibgeschützt)	Returns True if a table's data source is broken.	Boolean
longName (Schreibgeschützt)	A table's full path and name including group layers.	String
metadata (Lesen und schreiben)	Get or set the table's Metadata class information. Hinweis: Setting metadata is dependent on the isReadOnly property value.	Metadata
name (Lesen und schreiben)	Provides the ability to set or get the name of a table the way it would appear in the table of contents. Spaces can be included.	String
URI (Schreibgeschützt)	The Universal Resource Indicator for a table. It is a unique identifier for a table in a project and is sometimes required when using Python CIM access. Once a table is added and the URI is established, the value does not change over time. For example, if you modify the table's name, the URI will not change.	String

Methodenübersicht

Methode	Erläuterung
getDefinition (cim_version)	Gets a table's CIM definition.
getSelectionSet ()	Returns a table's selection as a Python set of Object IDs.
listDefinitionQueries ({wildcard})	Returns a Python list of definition queries associated with a table.
saveACopy (file_name)	Saves a table to a layer file (.lyrx).
setDefinition (definition_object)	Sets a table's CIM definition.
setSelectionSet ({oidList}, {method})	Sets a table's selection using a Python list of Object IDs.
updateConnectionProperties (current_connection_info, new_connection_info, {auto_update_joins_and_relates}, {validate}, {ignore_case})	Replaces connection properties using a dictionary or a path to a workspace.
updateDefinitionQueries (definitionQueries)	Updates a table's collection of definition queries.

Methoden

getDefinition (cim_version)

Parameter	Erläuterung	Datentyp
cim_version	A string that represents the major version of the CIM.	String

CIM-level access to additional object properties was introduced at version 2.4. Esri follows the semantic versioning specification. This means that until the next major release—for example, 3.0—when breaking API changes are allowed, the value to be used with cim_version is V2. Once 3.0 is released, a new V3 option will become available. This gives Python script authors control over the CIM version that will be used during execution if there is a possibility that breaking changes may be introduced in the new version.

For more information about working with the CIM and samples, see Python CIM Access.

getSelectionSet ()

Rückgabewert

Datentyp	Erläuterung
List	Returns a table's selection as a Python set of Object IDs.

Provides an easy way to retrieve the table's current selection.

listDefinitionQueries ({wildcard})

Parameter	Erläuterung	Datentyp
wildcard	A wildcard is based on the query name and is not case sensitive. A combination of asterisks (*) and characters can be used to limit the resulting list. (Der Standardwert ist None)	String

Rückgabewert

Datentyp	Erläuterung
List	A Python list of dictionaries that represent the properties associated with each query. The dictionary keys are name, sql, and isActive.

Definition queries can be added, modified, or removed from the Python list using standard practices. The dictionary isActive value can be set to True to set the active query. Again, only one query can be active. If you try setting more than one query to be active, an error will be returned. After changes are made, the updateDefinitionQueries function is used to set the new changes.

saveACopy (file_name)

Parameter	Erläuterung	Datentyp
file_name	A string that includes the location and name of the output layer file (.lyrx).	String

Both tables and layers can be saved to the layer file (.lyrx).

setDefinition (definition_object)

Parameter	Erläuterung	Datentyp
definition_object	A modified CIM definition object originally retrieved using getDefinition.	Object

For more information about working with the CIM and samples, see Python CIM Access.

setSelectionSet ({oidList}, {method})

Parameter	Erläuterung	Datentyp
oidList [oidList,...]	A Python list of Object IDs to use along with the appropriate selection method. (Der Standardwert ist None)	List
method	A string that specifies which selection method to use. NEW—Creates a new record selection from the oidList. DIFFERENCE—Selects the records that are not in the current selection but are in the oidList. INTERSECT—Selects the records that are in the current selection and the oidList. SYMDIFFERENCE—Selects the records that are in the current selection or the oidList but not both. UNION—Selects all the records in both the current selection and those in the oidList. (Der Standardwert ist NEW)	String

This method provides an easy way to manage a table's selection. To clear the selection, use the NEW selection method with an empty list or don't set any parameters. Python lists are used for the oidList, but sets get returned from the getSelectionSet method on the Table object.

updateConnectionProperties (current_connection_info, new_connection_info, {auto_update_joins_and_relates}, {validate}, {ignore_case})

Parameter	Erläuterung	Datentyp
current_connection_info	A string that represents the workspace path or a Python dictionary that contains connection properties to the source you want to update.	String
new_connection_info	A string that represents the workspace path or a Python dictionary that contains connection properties with the new source information.	String
auto_update_joins_and_relates	If set to True, the updateConnectionProperties method will also update the connections for associated joins or relates. (Der Standardwert ist True)	Boolean
validate	If set to True, the connection properties will only be updated if the new_connection_info value is a valid connection. If it is not valid, the connection will not be replaced. If set to False, the method will set all connections to match the new_connection_info, regardless of a valid match. In this case, if a match does not exist, then the data sources would be broken. (Der Standardwert ist True)	Boolean
ignore_case	Determines whether searches will be case sensitive or not. By default, queries are case sensitive. To perform case-insensitive queries, set ignore_case to True. (Der Standardwert ist False)	Boolean

For more detailed discussion, parameter information, scenarios, and code samples, refer to the Updating and fixing data sources help topic.

updateDefinitionQueries (definitionQueries)

Parameter	Erläuterung	Datentyp
definitionQueries [definitionQueries,...]	Updates a list of dictionaries that represent the properties of each definition query for a table.	List

This function is typically used to apply the changes that have been made to the results returned by the listDefinitionQueries function.

Codebeispiel

Table example 1

The following script prints the stand-alone table names that have a broken data source for all tables in all maps:

import arcpy
aprx = arcpy.mp.ArcGISProject(r"C:\Projects\YosemiteNP\Yosemite.aprx")
for m in aprx.listMaps():
    for tbl in m.listTables():
        if tbl.isBroken:
            print(f"Table: {tbl.name} is broken in map: {m.name}")
del aprx

Table example 2

The following script adds a table from a file geodatabase into a map:

import arcpy
aprx = arcpy.mp.ArcGISProject(r"C:\Projects\YosemiteNP\Yosemite.aprx")
addTab = arcpy.mp.Table(r"C:\Projects\YosemiteNP\Data_Vector\YosemiteData.gdb\NHDFCode")
m = aprx.listMaps("Yose*")[0]
m.addTable(addTab)
del aprx