revDatabaseColumnTypes

Typefunction
DictionaryLCS
LibraryLiveCode Script
Syntax
revDatabaseColumnTypes(<recordSetID>)
Synonymsrevdb_columntypes
Associationsdatabase library
Summary

Returns the data types of the columns in a record set.

Introduced1.1.1
Changes

The revDatabaseColumnTypes synonym was added in version 2.0.

OSmac, windows, linux, ios, android
Platformsdesktop, server, mobile
Parameters
NameTypeDescription
recordSetID

The number returned by the revQueryDatabase function when the record set was created.

Example
revDatabaseColumnTypes(the savedCursor of field 1)
if "BLOB" is among the items of revDatabaseColumnTypes(myCursor) then
  put true into preferQueryBlob
end if
Values
NameTypeDescription
return

The revDatabaseColumnTypes function returns a list of data types, one for each column in the record set, separated by commas.

RelatedKeyword: field
Control Structure: function
Function: revDatabaseColumnNames, revDatabaseColumnLengths, revDatabaseType
Library: Database library
Glossary: LiveCode custom library, return, binary file, record set, Standalone Application Settings, standalone application, column, database field, BLOB
Securitydisk, network
Description

Use the revDatabaseColumnTypes function to find out the data type of a database field.

The possible data types are:

    * BIT
    * CHAR
    * STRING
    * WSTRING
    * BLOB (short for binary large object)
    * TIMESTAMP
    * DATE
    * TIME
    * DATETIME
    * FLOAT
    * DOUBLE
    * INTEGER
    * SMALLINT
    * WORD
    * BOOLEAN
    * LONG

You can use the revDatabaseColumnTypes function to find out what kind of data you need to be prepared for. For example, if BLOB is one of the data types, that column is binary data, so you should not attempt to display it in a field.

Important: The revDatabaseColumnTypes function is part of the Database library. To ensure that the function works in a standalone application, you must include this custom library when you create your standalone. In the Inclusions pane of the Standalone Application Settings window, make sure both the "Database" library checkbox and those of the database drivers you are using are checked.