4D v18
Is table number valid
- 4D Language Reference
-
- Structure Access
-
- Structure Access Commands
- CREATE INDEX
- DELETE INDEX
- EXPORT STRUCTURE
- Field
- Field name
- Get external data path
- GET FIELD ENTRY PROPERTIES
- GET FIELD PROPERTIES
- Get last field number
- Get last table number
- GET MISSING TABLE NAMES
- GET RELATION PROPERTIES
- GET TABLE PROPERTIES
- IMPORT STRUCTURE
- Is field number valid
- Is table number valid
- PAUSE INDEXES
- REGENERATE MISSING TABLE
- RELOAD EXTERNAL DATA
- RESUME INDEXES
- SET EXTERNAL DATA PATH
- SET INDEX
- Table
- Table name
4D v18
Is table number valid
Is table number valid
| Is table number valid ( tableNum ) -> Function result | ||||||||
| Parameter | Type | Description | ||||||
| tableNum | Longint |
|
Table number | |||||
| Function result | Boolean |
|
True = table exists in database, False = table does not exist in database | |||||
The Is table number valid command returns True if the table whose number is passed in the tableNum parameter exists in the database and False otherwise. Keep in mind that the command returns False if the table is in the Trash of the Explorer.
This command can be used to detect any table deletions, which create gaps in the sequence of table numbers.
See also
PROPERTIES
Product: 4D
Theme: Structure Access
Number:
999
HISTORY
Created: 4D v11 SQL
ARTICLE USAGE
4D Language Reference ( 4D v18)
© 1985-2020 4D SAS / 4D, Inc. All rights reserved.