AddFieldDelimiters

Zusammenfassung

Adds field delimiters to a field name to allow for use in SQL expressions.

The field delimiters used in an SQL expression differ depending on the format of the queried data. For instance, file geodatabases and shapefiles use double quotation marks (" "), and enterprise geodatabases don't use field delimiters. The function can take away the guess work in ensuring that the field delimiters used with your SQL expression are the correct ones.

Syntax

AddFieldDelimiters (datasource, field)

Parameter	Erläuterung	Datentyp
datasource	The field delimiters are based on the data source used.	String
field	The field name to which delimiters will be added. The field does not have to currently exist.	String

Rückgabewert

Datentyp	Erläuterung
String	Returns a delimited field name.

Codebeispiel

AddFieldDelimiters example

import arcpy

field_name = arcpy.GetParameterAsText(0)
arcpy.env.workspace = arcpy.GetParameterAsText(1)
in_features = arcpy.GetParameterAsText(2)
out_feat_class = arcpy.GetParameterAsText(3)
state_value = arcpy.GetParameterAsText(4)

# AddFieldDelimiters will return a field name with the proper
# field delimiters for the workspace specified.
sql_exp = """{0} = '{1}'""".format(
    arcpy.AddFieldDelimiters('c:/data', field_name),
    state_value)

# Use delimited field for Select tool SQL expression
arcpy.analysis.Select(in_features, out_feat_class, sql_exp)