Modifier les champs (multiple) (Outils de gestion des données)

Résumé

Modifie les propriétés de plusieurs champs dans une table ou classe d’entités.

Utilisation

Attention :

Cet outil modifie les données en entrée. Pour en savoir plus et découvrir des stratégies permettant d’éviter des modifications de données non souhaitées, reportez-vous à la section Outils qui modifient ou mettent à jour les données en entrée.

Cet outil permet de renommer les champs ou les alias de champ d’une classe d’entités ou d’une table de géodatabase.
Vous pouvez utiliser cet outil pour modifier l’alias d’un champ dans une table ou une vue inscrite auprès de la géodatabase.
Si un champ en entrée est un champ obligatoire, seul l’alias de champ peut être modifié.

Etiqueter	Explication	Type de données
Input Table (Table en entrée)	Classe d’entités ou table de géosatabase en entrée contenant le champ à modifier.	Table View; Raster Layer; Mosaic Layer
Propriétés du champ (Facultatif)	Champs de la table en entrée, ainsi que leurs propriétés, qui seront modifiés. Colonnes de la table de valeurs : Field Name—The name of the field that will be altered. If the field is a required field, only the field alias will be altered. New Field Name—The new name for the field. New Field Alias—The new field alias for the field. New Field Type—Specifies the new field type for the field. This option is only applicable if the input table is empty (does not contain records). Short (16-bit integer)—The field type will be short. Short fields support whole numbers between -32,768 and 32,767. Long (32-bit integer)—The field type will be long. Long fields support whole numbers between -2,147,483,648 and 2,147,483,647. Big integer (64-bit integer)—The field type will be big integer. Big integer fields support whole numbers between -(253) and 253. Float (32-bit floating point)—The field type will be float. Float fields support fractional numbers between -3.4E38 and 1.2E38. Double (64-bit floating point)—The field type will be double. Double fields support fractional numbers between -2.2E308 and 1.8E308. Text—The field type will be text. Text fields support a string of characters. Date—The field type will be date. Date fields support date and time values. Date only—The field type will be date only. Date only fields support date values with no time values. Time only—The field type will be time only. Time only fields support time values with no date values. Timestamp offset—The field type will be timestamp offset. Timestamp offset fields support a date, time, and offset from a UTC value. BLOB (binary data)—The field type will be BLOB. BLOB fields support data stored as a long sequence of binary numbers. You need a custom loader or viewer or a third-party application to load items into a BLOB field or view the contents of a BLOB field. GUID (globally unique identifier)—The field type will be GUID. GUID fields store registry-style strings consisting of 36 characters enclosed in curly brackets. Raster—The field type will be raster. Raster fields can store raster data in or alongside the geodatabase. All ArcGIS software-supported raster dataset formats can be stored, but it is recommended that only small images be used. New Field Length—The new length of the field. This sets the maximum number of allowable characters for each record of the field. This option is only applicable to fields of type Text or Blob. If the table is empty, the field length can be increased or decreased. If the table is not empty, the length can only be increased from the current value. New Field Is Nullable—Specifies whether the field can contain null values. Clear Alias—Specifies whether the alias for the input field will be cleared.	Value Table

Etiqueter

Explication

Type de données

Input Table (Table en entrée)

Classe d’entités ou table de géosatabase en entrée contenant le champ à modifier.

Table View; Raster Layer; Mosaic Layer

Propriétés du champ

(Facultatif)

Champs de la table en entrée, ainsi que leurs propriétés, qui seront modifiés.

Colonnes de la table de valeurs :

Field Name—The name of the field that will be altered. If the field is a required field, only the field alias will be altered.
New Field Name—The new name for the field.
New Field Alias—The new field alias for the field.
New Field Type—Specifies the new field type for the field. This option is only applicable if the input table is empty (does not contain records).
- Short (16-bit integer)—The field type will be short. Short fields support whole numbers between -32,768 and 32,767.
- Long (32-bit integer)—The field type will be long. Long fields support whole numbers between -2,147,483,648 and 2,147,483,647.
- Big integer (64-bit integer)—The field type will be big integer. Big integer fields support whole numbers between -(253) and 253.
- Float (32-bit floating point)—The field type will be float. Float fields support fractional numbers between -3.4E38 and 1.2E38.
- Double (64-bit floating point)—The field type will be double. Double fields support fractional numbers between -2.2E308 and 1.8E308.
- Text—The field type will be text. Text fields support a string of characters.
- Date—The field type will be date. Date fields support date and time values.
- Date only—The field type will be date only. Date only fields support date values with no time values.
- Time only—The field type will be time only. Time only fields support time values with no date values.
- Timestamp offset—The field type will be timestamp offset. Timestamp offset fields support a date, time, and offset from a UTC value.
- BLOB (binary data)—The field type will be BLOB. BLOB fields support data stored as a long sequence of binary numbers. You need a custom loader or viewer or a third-party application to load items into a BLOB field or view the contents of a BLOB field.
- GUID (globally unique identifier)—The field type will be GUID. GUID fields store registry-style strings consisting of 36 characters enclosed in curly brackets.
- Raster—The field type will be raster. Raster fields can store raster data in or alongside the geodatabase. All ArcGIS software-supported raster dataset formats can be stored, but it is recommended that only small images be used.
New Field Length—The new length of the field. This sets the maximum number of allowable characters for each record of the field. This option is only applicable to fields of type Text or Blob. If the table is empty, the field length can be increased or decreased. If the table is not empty, the length can only be increased from the current value.
New Field Is Nullable—Specifies whether the field can contain null values.
Clear Alias—Specifies whether the alias for the input field will be cleared.

Value Table

Sortie dérivée

Etiqueter	Explication	Type de données
Table en entrée mise à jour	Table en entrée mise à jour.	Table View; Raster Layer; Mosaic Layer

arcpy.management.AlterFields(in_table, {field_description})

Nom Explication Type de données

Nom	Explication	Type de données
in_table	Classe d’entités ou table de géosatabase en entrée contenant le champ à modifier.	Table View; Raster Layer; Mosaic Layer
field_description [[Field Name, {New Field Name}, {New Field Alias}, {New Field Type}, {New Field Length}, {New Field IsNullable}, {Clear Alias}],...] (Facultatif)	Champs de la table en entrée, ainsi que leurs propriétés, qui seront modifiés. Colonnes de la table de valeurs : `Field Name`—The name of the field that will be altered. If the field is a required field, only the field alias will be altered. `New Field Name`—The new name for the field. `New Field Alias`—The new field alias for the field. `New Field Type`—Specifies the new field type for the field. This option is only applicable if the input table is empty (does not contain records). `SHORT`—The field type will be short. Short fields support whole numbers between -32,768 and 32,767. `LONG`—The field type will be long. Long fields support whole numbers between -2,147,483,648 and 2,147,483,647. `BIGINTEGER`—The field type will be big integer. Big integer fields support whole numbers between -(253) and 253. `FLOAT`—The field type will be float. Float fields support fractional numbers between -3.4E38 and 1.2E38. `DOUBLE`—The field type will be double. Double fields support fractional numbers between -2.2E308 and 1.8E308. `TEXT`—The field type will be text. Text fields support a string of characters. `DATE`—The field type will be date. Date fields support date and time values. `DATEONLY`—The field type will be date only. Date only fields support date values with no time values. `TIMEONLY`—The field type will be time only. Time only fields support time values with no date values. `TIMESTAMPOFFSET`—The field type will be timestamp offset. Timestamp offset fields support a date, time, and offset from a UTC value. `BLOB`—The field type will be BLOB. BLOB fields support data stored as a long sequence of binary numbers. You need a custom loader or viewer or a third-party application to load items into a BLOB field or view the contents of a BLOB field. `GUID`—The field type will be GUID. GUID fields store registry-style strings consisting of 36 characters enclosed in curly brackets. `RASTER`—The field type will be raster. Raster fields can store raster data in or alongside the geodatabase. All ArcGIS software-supported raster dataset formats can be stored, but it is recommended that only small images be used. `New Field Length`—The new length of the field. This sets the maximum number of allowable characters for each record of the field. This option is only applicable to fields of type Text or Blob. If the table is empty, the field length can be increased or decreased. If the table is not empty, the length can only be increased from the current value. `New Field IsNullable`—Specifies whether the field can contain null values. `Clear Alias`—Specifies whether the alias for the input field will be cleared.	Value Table

in_table

Classe d’entités ou table de géosatabase en entrée contenant le champ à modifier.

Table View; Raster Layer; Mosaic Layer

field_description [[Field Name, {New Field Name}, {New Field Alias}, {New Field Type}, {New Field Length}, {New Field IsNullable}, {Clear Alias}],...]

(Facultatif)

Champs de la table en entrée, ainsi que leurs propriétés, qui seront modifiés.

Colonnes de la table de valeurs :

Field Name—The name of the field that will be altered. If the field is a required field, only the field alias will be altered.
New Field Name—The new name for the field.
New Field Alias—The new field alias for the field.
New Field Type—Specifies the new field type for the field. This option is only applicable if the input table is empty (does not contain records).
- SHORT—The field type will be short. Short fields support whole numbers between -32,768 and 32,767.
- LONG—The field type will be long. Long fields support whole numbers between -2,147,483,648 and 2,147,483,647.
- BIGINTEGER—The field type will be big integer. Big integer fields support whole numbers between -(253) and 253.
- FLOAT—The field type will be float. Float fields support fractional numbers between -3.4E38 and 1.2E38.
- DOUBLE—The field type will be double. Double fields support fractional numbers between -2.2E308 and 1.8E308.
- TEXT—The field type will be text. Text fields support a string of characters.
- DATE—The field type will be date. Date fields support date and time values.
- DATEONLY—The field type will be date only. Date only fields support date values with no time values.
- TIMEONLY—The field type will be time only. Time only fields support time values with no date values.
- TIMESTAMPOFFSET—The field type will be timestamp offset. Timestamp offset fields support a date, time, and offset from a UTC value.
- BLOB—The field type will be BLOB. BLOB fields support data stored as a long sequence of binary numbers. You need a custom loader or viewer or a third-party application to load items into a BLOB field or view the contents of a BLOB field.
- GUID—The field type will be GUID. GUID fields store registry-style strings consisting of 36 characters enclosed in curly brackets.
- RASTER—The field type will be raster. Raster fields can store raster data in or alongside the geodatabase. All ArcGIS software-supported raster dataset formats can be stored, but it is recommended that only small images be used.
New Field Length—The new length of the field. This sets the maximum number of allowable characters for each record of the field. This option is only applicable to fields of type Text or Blob. If the table is empty, the field length can be increased or decreased. If the table is not empty, the length can only be increased from the current value.
New Field IsNullable—Specifies whether the field can contain null values.
Clear Alias—Specifies whether the alias for the input field will be cleared.

Value Table

Sortie dérivée

Nom	Explication	Type de données
out_table	Table en entrée mise à jour.	Table View; Raster Layer; Mosaic Layer

Exemple de code

Exemple 1 d’utilisation de AlterFields (script autonome)

Le script autonome ci-dessous illustre l’utilisation de la fonction AlterFields en vue de modifier les alias des champs dans une classe d’entités.

import arcpy

test_class = arcpy.management.CreateFeatureclass(out_gdb, "new_fc", geometry_type='POLYGON')
field_description = [
    ['SHORT_FIELD', 'SHORT', 'SHORT_FIELD_Alias', '#', '#', '#'],
    ['LONG_FIELD', 'LONG', 'LONG_FIELD_Alias', '#', '#', '#'],
    ['BIGINTEGER_FIELD', 'BIGINTEGER', 'BIGINTEGER_FIELD_Alias', '#', '#', '#'],
    ['FLOAT_FIELD', 'FLOAT', 'FLOAT_FIELD_Alias', '#', '#', '#'],
    ['DOUBLE_FIELD', 'DOUBLE', 'DOUBLE_FIELD_Alias', '#', '#', '#'],
    ['TEXT_FIELD', 'TEXT', 'TEXT_FIELD_Alias', '#', '#', '#'],
    ['DATE_FIELD', 'DATE', 'DATE_FIELD_Alias', '#', '#', '#'],
    ['DATEONLY_FIELD', 'DATEONLY', 'DATEONLY_FIELD_Alias', '#', '#', '#'],
    ['TIMEONLY_FIELD', 'TIMEONLY', 'TIMEONLY_FIELD_Alias', '#', '#', '#'],
    ['TIMESTAMPOFFSET_FIELD', 'TIMESTAMPOFFSET', 'TIMESTAMPOFFSET_FIELD_Alias', '#', '#', '#']
]
arcpy.management.AddFields(test_class, field_description, None)

alter_field_description = [
    ['SHORT_FIELD', 'SHORT_FIELD_altered', '#', '#', '#', '#'],
    ['LONG_FIELD', 'LONG_FIELD_altered', '#', '#', '#', '#'],
    ['BIGINTEGER_FIELD', 'BIGINTEGER_FIELD_altered', '#', '#', '#', '#'],
    ['FLOAT_FIELD', 'FLOAT_FIELD_altered', '#', '#', '#', '#'],
    ['DOUBLE_FIELD', 'DOUBLE_FIELD_altered', '#', '#', '#', '#'],
    ['TEXT_FIELD', 'TEXT_FIELD_altered', '#', '#', '#', '#'],
    ['DATE_FIELD', 'DATE_FIELD_altered', '#', '#', '#', '#'],
    ['DATEONLY_FIELD', 'DATEONLY_FIELD_altered', '#', '#', '#', '#'],
    ['TIMEONLY_FIELD', 'TIMEONLY_FIELD_altered', '#', '#', '#', '#'],
    ['TIMESTAMPOFFSET_FIELD', 'TIMESTAMPOFFSET_FIELD_altered', '#', '#', '#', '#']
]
arcpy.management.AlterFields(in_table=test_class, field_description=alter_field_description)

Exemple 2 d’utilisation de AlterFields (script autonome)

Le script autonome ci-dessous illustre l’utilisation de la fonction AlterFields en vue de modifier la propriété du champ acceptant les valeurs nulles dans une table vide.

import arcpy

test_class = arcpy.management.CreateTable(out_gdb, "new_table")
field_description = [
    ['SHORT_FIELD', 'SHORT', 'SHORT_FIELD_Alias', '#', '#', '#'],
    ['LONG_FIELD', 'LONG', 'LONG_FIELD_Alias', '#', '#', '#'],
    ['BIGINTEGER_FIELD', 'BIGINTEGER', 'BIGINTEGER_FIELD_Alias', '#', '#', '#'],
    ['FLOAT_FIELD', 'FLOAT', 'FLOAT_FIELD_Alias', '#', '#', '#'],
    ['DOUBLE_FIELD', 'DOUBLE', 'DOUBLE_FIELD_Alias', '#', '#', '#'],
    ['TEXT_FIELD', 'TEXT', 'TEXT_FIELD_Alias', '#', '#', '#'],
    ['DATE_FIELD', 'DATE', 'DATE_FIELD_Alias', '#', '#', '#'],
    ['DATEONLY_FIELD', 'DATEONLY', 'DATEONLY_FIELD_Alias', '#', '#', '#'],
    ['TIMEONLY_FIELD', 'TIMEONLY', 'TIMEONLY_FIELD_Alias', '#', '#', '#'],
    ['TIMESTAMPOFFSET_FIELD', 'TIMESTAMPOFFSET', 'TIMESTAMPOFFSET_FIELD_Alias', '#', '#', '#']
]

arcpy.management.AddFields(test_class, field_description, None)

# Change the nullable property to true
alter_field_description = [
    ['SHORT_FIELD', '#', '#', '#','#', 'true', '#'],
    ['LONG_FIELD', '#', '#', '#','#', 'true', '#'],
    ['BIGINTEGER_FIELD', '#', '#', '#','#', 'true', '#'],
    ['FLOAT_FIELD', '#', '#', '#','#', 'true', '#'],
    ['DOUBLE_FIELD', '#', '#', '#','#', 'true', '#'],
    ['TEXT_FIELD', '#', '#', '#','#', 'true', '#'],
    ['DATE_FIELD', '#', '#', '#','#', 'true', '#'],
    ['DATEONLY_FIELD', '#', '#', '#','#', 'true', '#'],
    ['TIMEONLY_FIELD', '#', '#', '#','#', 'true', '#'],
    ['TIMESTAMPOFFSET_FIELD', '#', '#', '#','#', 'true', '#']
]

arcpy.management.AlterFields(in_table=test_class, field_description=alter_field_description)

Environnements

Espace de travail courant

Informations de licence

Basic: Oui
Standard: Oui
Advanced: Oui

Modifier les champs (multiple) (Outils de gestion des données)

Résumé

Utilisation

Attention :

Paramètres

Sortie dérivée

Environnements

Informations de licence

Rubriques connexes