Keyword Search:
Book Home

Contents
Preface

Virtuoso Functions Guide

Administration
Aggregate Functions
Array Manipulation
BPEL APIs
Backup
Compression
Cursor
Date & Time Manipulation
Debug
Dictionary Manipulation
Encoding & Decoding
File Manipulation
Free Text
Hashing / Cryptographic
LDAP
Locale
Mail
Miscellaneous
Number
Phrases
RDF data
Remote SQL Data Source
Replication
SOAP
SQL
String
Transaction
Type Mapping
import_jar
internal_to_sql_type
internal_type
internal_type_name
isarray
isbinary
isblob
isdouble
isentity
isfloat
isinteger
isnull
isnumeric
isstring
iszero
jvm_ref_import
make_string
sign
stringdate
stringtime
udt_defines_field
udt_get
udt_implements_metho...
udt_instance_of
udt_set
unimport_jar
UDDI
User Defined Types & The CLR
Virtuoso Java PL API
Virtuoso Server Extension Interface (VSEI)
Web Server & Internet
XML
XPATH & XQUERY

Functions Index

isstring

returns true if its argument is of type varchar
boolean isstring
( arg anything );
Parameters
arg – Some variable to be assessed.
Description

isstring returns one if its argument is of type VARCHAR, zero otherwise. 

isstring('Cadena de los patos amarillos')
		-> 1 (Yes it is a string)