PreserveSingleQuotes

Last updated on May 30, 2024 | Also applies to ColdFusion

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CFML Reference User Guide
ColdFusion functions
ColdFusion tags
1. ColdFusion tag summary
2. ColdFusion tags by category
  1. Application framework tags
    1. cfapplication
    2. cfassociate
    3. cferror
    4. cfimport
    5. cfinterface
    6. cflock
    7. cfscript
    8. cfthread
  2. Communications tags
  3. Database manipulation tags
  4. Data output tags
    1. cfchart
  5. Debugging tags
    1. cfdump
    2. cftimer
    3. cftrace
  6. Exception handling tags
    1. cfcatch
    2. cferror
    3. cffinally
    4. cfrethrow
    5. cfthrow
    6. cftry
  7. Extensibility tags
    1. cfchart
    2. cfchartdata
    3. cfchartseries
    4. cfcollection
    5. cfcomponent
    6. cfexecute
    7. cfftp
    8. function
    9. cfindex
    10. cfinterface
    11. cfinvoke
    12. cfinvokeargument
    13. cfobject
    14. cfproperty
    15. cfreport
    16. cfreportparam
    17. cfreturn
    18. cfsearch
    19. cfsharepoint
    20. cfspreadsheet
    21. cfwddx
    22. cfxml
  8. File management tags
    1. cfdirectory
    2. cffile
    3. cffileupload
    4. cfftp
    5. cfzip
    6. cfzipparam
  9. Flow-control tags
    1. cfabort
    2. cfbreak
    3. cfcase
    4. cfcontinue
    5. cfdefaultcase
    6. cfelse
    7. cfelseif
    8. cfexecute
    9. cfexit
    10. cfif
    11. cfinclude
    12. cflocation
    13. cfloop
    14. cfrethrow
    15. cfswitch
    16. cfthrow
    17. cftry
  10. Forms tags
    1. cfapplet
    2. cfcalendar
    3. cffileupload
    4. cfform
    5. cfformgroup
    6. cfformitem
    7. cfgrid
    8. cfgridcolumn
    9. cfgridrow
    10. cfgridupdate
    11. cfinput
    12. cfpdf
    13. cfpdfform
    14. cfpdfformparam
    15. cfpdfparam
    16. cfpdfsubform
    17. cfselect
    18. cfslider
    19. cftextarea
    20. cftree
    21. cftreeitem
  11. Internet Protocol tags
    1. cfajaximport
    2. cfajaxproxy
    3. cfftp
    4. cffeed
    5. cfimap
    6. cfhttp
    7. cfhttpparam
    8. cfldap
    9. cfmail
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    11. cfmailpart
    12. cfpop
    13. cfsprydataset
  12. Page processing tags
    1. cfcache
    2. cfcontent
    3. cfflush
    4. cfheader
    5. cfhtmlhead
    6. cfinclude
    7. cfprocessingdirective
    8. cfsetting
    9. cfsilent
  13. Security tags
  14. Variable manipulation tags
    1. cfcookie
    2. cfdump
    3. cfparam
    4. cfregistry
    5. cfsavecontent
    6. cfschedule
    7. cfset
    8. cfsetting
  15. Other tags
    1. cfimage
    2. cflog
    3. cfregistry
3. Tags a-b
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  1. cfgraph
  2. cfgraphdata
  3. cfgrid
  4. cfgridcolumn
  5. cfgridrow
  6. cfgridupdate
  7. cfheader
  8. cfhtmlhead
  9. cfhtmltopdf
  10. cfhtmltopdfitem
  11. cfhttp
  12. cfhttpparam
7. Tags i
  1. cfif
  2. cfimage
  3. cfimap
  4. cfimapfilter
  5. cfimpersonate
  6. cfimport
  7. cfinclude
  8. cfindex
  9. cfinput
  10. cfinsert
  11. cfinterface
  12. cfinvoke
  13. cfinvokeargument
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  1. cfparam
  2. cfpdf
  3. cfpdfform
  4. cfpdfformparam
  5. cfpdfparam
  6. cfpdfsubform
  7. cfpod
  8. cfpop
  9. cfpresentation
  10. cfpresentationslide
  11. cfpresenter
  12. cfprint
  13. cfprocessingdirective
  14. cfprocparam
  15. cfprocresult
  16. cfprogressbar
  17. cfproperty
  18. cfquery
  19. cfqueryparam
11. Tags r-s
  1. cfregistry
  2. cfreport
  3. cfreportparam
  4. cfrethrow
  5. cfreturn
  6. cfsavecontent
  7. cfschedule
  8. cfscript
  9. cfsearch
  10. cfselect
  11. cfservlet
  12. cfservletparam
  13. cfset
  14. cfsetting
  15. cfsharepoint
  16. cfsilent
  17. cfslider
  18. cfspreadsheet
  19. cfsprydataset
  20. cfstoredproc
  21. cfswitch
12. Tags t
  1. cftable
  2. cftextarea
  3. cftextinput
  4. cfthread
  5. cfthrow
  6. cftimer
  7. cftooltip
  8. cftrace
  9. cftransaction
  10. cftree
  11. cftreeitem
  12. cftry
13. Tags u-z
  1. cfupdate
  2. cfwddx
  3. cfwebsocket
  4. cfwindow
  5. cfxml
  6. cfzip
  7. cfzipparam
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Description

Prevents ColdFusion from automatically escaping single-quotation mark characters that are contained in an expression. ColdFusion does not evaluate the argument.

Returns

(None)

Function syntax

PreserveSingleQuotes(expression)

PreserveSingleQuotes(expression)

History

ColdFusion MX: Changed behavior: ColdFusion automatically escapes single quotes within any expression value within a cfquery tag body or block. (Earlier releases did not automatically escape array-variable references.)

Parameters

Parameter	Description
expression	Expression that evaluates to a string in which to preserve single-quotation marks.

Usage

This function is useful in SQL statements to defer evaluation of an expression until runtime. This prevents errors that result from the evaluation of a single-quote or apostrophe data character (for example, "Joe's Diner") as a delimiter. Example A: Consider this code:

PreserveSingleQuotes(#mystring#) is

#PreserveSingleQuotes(mystring)#

</cfoutput>

<cfset mystring = "'Newton's Law', 'Fermat's Theorem'"> PreserveSingleQuotes(#mystring#) is <cfoutput> #PreserveSingleQuotes(mystring)# </cfoutput>

<cfset mystring = "'Newton's Law', 'Fermat's Theorem'"> 
PreserveSingleQuotes(#mystring#) is 
<cfoutput> 
#PreserveSingleQuotes(mystring)# 
</cfoutput>

The output is as follows:

PreserveSingleQuotes(#mystring#) is 'Newton's Law', 'Fermat's Theorem'

PreserveSingleQuotes(#mystring#) is 'Newton's Law', 'Fermat's Theorem'

Example B: Consider this code:

ColdFusion escapes the single-quote characters in the list as follows:

""1"", ""2"", ""3""

The cfquery tag throws an error.You code this function correctly as follows:

<cfquery sql = "select * from foo where bar in (#preserveSingleQuotes(list0)#)"> **tharwood 11/16

<cfquery sql = "select * from foo where bar in (#preserveSingleQuotes(list0)#)"> **tharwood 11/16

is function ensures that ColdFusion evaluates the code as follows:

'1', '2', '3'

Example

<h3>PreserveSingleQuotes Example</h3><p>This is a useful function for

creating lists of information to return from a query. In this example,

we pick the list of Centers in Suisun, San Francisco, and San Diego,

using the SQL grammar IN to modify a WHERE clause, rather than looping

through the result set after the query is run.

SELECT Name, Address1, Address2, City, Phone

FROM Centers

WHERE City IN (#PreserveSingleQuotes(List)#)

</cfquery>

<p>We found <cfoutput>#GetCenters.RecordCount#</cfoutput> records.

#Address1#<br>

<cfif Address2 is not "">#Address2#

</cfif>

#City#<br>

#Phone#<br>

</cfoutput>

<h3>PreserveSingleQuotes Example</h3><p>This is a useful function for creating lists of information to return from a query. In this example, we pick the list of Centers in Suisun, San Francisco, and San Diego, using the SQL grammar IN to modify a WHERE clause, rather than looping through the result set after the query is run. <cfset List = "'Suisun', 'San Francisco', 'San Diego'"> <cfquery name = "GetCenters" datasource = "cfdocexamples"> SELECT Name, Address1, Address2, City, Phone FROM Centers WHERE City IN (#PreserveSingleQuotes(List)#) </cfquery> <p>We found <cfoutput>#GetCenters.RecordCount#</cfoutput> records. <cfoutput query = "GetCenters"> <p>#Name#<br> #Address1#<br> <cfif Address2 is not "">#Address2# </cfif> #City#<br> #Phone#<br> </cfoutput>

<h3>PreserveSingleQuotes Example</h3><p>This is a useful function for 
creating lists of information to return from a query. In this example, 
we pick the list of Centers in Suisun, San Francisco, and San Diego, 
using the SQL grammar IN to modify a WHERE clause, rather than looping 
through the result set after the query is run. 
<cfset List = "'Suisun', 'San Francisco', 'San Diego'"> 
<cfquery name = "GetCenters" datasource = "cfdocexamples"> 
SELECT Name, Address1, Address2, City, Phone 
FROM Centers 
WHERE City IN (#PreserveSingleQuotes(List)#) 
</cfquery> 
<p>We found <cfoutput>#GetCenters.RecordCount#</cfoutput> records. 
<cfoutput query = "GetCenters"> 
<p>#Name#<br> 
#Address1#<br> 
<cfif Address2 is not "">#Address2# 
</cfif> 
#City#<br> 
#Phone#<br> 
</cfoutput>

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