Technical Article

Add Wildcards to Advanced Search Stored Procedure

,

I have found that I can add wildcard support to the Advanced Search Stored Procedure submitted by jgroseth (Posted: 07/02/2004) here:
http://www.sqlservercentral.com/scripts/contributions/1201.asp

by simply modifying "charindex( c.string," to "patindex('%' + c.string + '%'"

I did this to take varying whitespace into account since SQL server does not care about whitespace, for example
"INSERT INTO DATABASE_MYTABLE" could have any number of spaces between "INSERT", "INTO", and "DATABASE_MYTABLE", Without wildcards one would need to search for every stored procedure that contained these three words. With wildcards we can limit the search to the three words in sequence"
"INSERT %INTO %DATABASE_MYTABLE"

My change hardly justifies changing the credit for this great stored proceure, so I left the credits as they are.

-- sp_grep   v1.0 03/16/1995, v1.1 10/26/1995
-- Author:   Andrew Zanevsky, AZ Databases, Inc. 
-- E-mail:   zanevsky@azdatabases.com
ALTER   proc dbo.sp_grep @parameter varchar(255) = null, @case char(1) = 's'
as
declare @str_no          tinyint, 
        @msg_str_no      varchar(3),
        @operation       char(1), 
        @string          varchar(80), 
        @oper_pos        smallint,
        @context         varchar(255),
        @i               tinyint,
        @longest         tinyint,
        @msg             varchar(255)
BEGIN --procedure
if @parameter is null /* provide instructions */begin
    print 'Execute sp_grep "{string1}operation1{string2}operation2{string3}...", [case]'
    print '- stringN is a string of characters up to 80 characters long, '
    print '  enclosed in curly brackets. Brackets may be omitted if stringN '
    print '  does not contain leading and trailing spaces or characters: +,-,&.'
    print '- operationN is one of the characters: +,-,&. Interpreted as or,minus,and.'
    print '  Operations are executed from left to right with no priorities.'
    print '- case: specify "i" for case insensitive comparison.'
    print 'E.g. sp_grep "alpha+{beta gamma}-{delta}&{+++}"'
    print '     will search for all objects that have an occurence of string "alpha"'
    print '     or string "beta gamma", do not have string "delta", '
    print '     and have string "+++".'
    return
end
/* Check for <CarriageReturn> or <LineFeed> characters */if charindex( char(10), @parameter ) > 0 or charindex( char(13), @parameter ) > 0
begin
    print 'Parameter string may not contain <CarriageReturn> or <LineFeed> characters.'
    return
end
if lower( @case ) = 'i'
        select  @parameter = lower( ltrim( rtrim( @parameter ) ) )
else
        select  @parameter = ltrim( rtrim( @parameter ) )
create table #search ( str_no tinyint, operation char(1), string varchar(80), last_obj int )
create table #found_objects ( id int, str_no tinyint )
create table #result ( id int )
/* Parse the parameter string */select @str_no = 0
while datalength( @parameter ) > 0
begin
  /* Get operation */  select @str_no = @str_no + 1, @msg_str_no = rtrim( convert( char(3), @str_no + 1 ) )
  if @str_no = 1
    select  @operation = '+'
  else 
  begin
    if substring( @parameter, 1, 1 ) in ( '+', '-', '&' )
        select  @operation = substring( @parameter, 1, 1 ),
                @parameter = ltrim( right( @parameter, datalength( @parameter ) - 1 ) )
    else
    begin
        select @context = rtrim( substring( 
                        @parameter + space( 255 - datalength( @parameter) ), 1, 20 ) )
        select @msg = 'Incorrect or missing operation sign before "' + @context + '".'
        print  @msg 
        select @msg = 'Search string ' + @msg_str_no + '.'
        print  @msg 
        return
    end
  end
  
  /* Get string */  if datalength( @parameter ) = 0
  begin
      print 'Missing search string at the end of the parameter.'
      select @msg = 'Search string ' + @msg_str_no + '.'
      print  @msg 
      return
  end
  if substring( @parameter, 1, 1 ) = '{'
  begin
      if charindex( '}', @parameter ) = 0
      begin
          select @context = rtrim( substring( 
                      @parameter + space( 255 - datalength( @parameter) ), 1, 200 ) )
          select @msg = 'Bracket not closed after "' + @context + '".'
          print  @msg 
          select @msg = 'Search string ' + @msg_str_no + '.'
          print  @msg 
          return
      end
      if charindex( '}', @parameter ) > 82
      begin
          select @context = rtrim( substring( 
                      @parameter + space( 255 - datalength( @parameter) ), 2, 20 ) )
          select @msg = 'Search string ' + @msg_str_no + ' is longer than 80 characters.'
          print  @msg 
          select @msg = 'String begins with "' + @context + '".'
          print  @msg 
          return
      end        
      select  @string    = substring( @parameter, 2, charindex( '}', @parameter ) - 2 ),
              @parameter = ltrim( right( @parameter, 
                              datalength( @parameter ) - charindex( '}', @parameter ) ) )
  end
  else
  begin
      /* Find the first operation sign */      select @oper_pos = datalength( @parameter ) + 1
      if charindex( '+', @parameter ) between 1 and @oper_pos
          select @oper_pos = charindex( '+', @parameter )
      if charindex( '-', @parameter ) between 1 and @oper_pos
          select @oper_pos = charindex( '-', @parameter )
      if charindex( '&', @parameter ) between 1 and @oper_pos
          select @oper_pos = charindex( '&', @parameter )
      if @oper_pos = 1
      begin
          select @context = rtrim( substring( 
                      @parameter + space( 255 - datalength( @parameter) ), 1, 20 ) )
          select @msg = 'Search string ' + @msg_str_no + 
                        ' is missing, before "' + @context + '".'
          print  @msg 
          return
      end        
      if @oper_pos > 81
      begin
          select @context = rtrim( substring( 
                      @parameter + space( 255 - datalength( @parameter) ), 1, 20 ) )
          select @msg = 'Search string ' + @msg_str_no + ' is longer than 80 characters.'
          print  @msg 
          select @msg = 'String begins with "' + @context + '".'
          print  @msg 
          return
      end        
      select  @string    = substring( @parameter, 1, @oper_pos - 1 ),
              @parameter = ltrim( right( @parameter, 
                              datalength( @parameter ) - @oper_pos + 1 ) )
  end
  insert #search values ( @str_no, @operation, @string, 0 )
end
select @longest = max( datalength( string ) ) - 1
from   #search
/* ------------------------------------------------------------------ *//* Search for strings */if @case = 'i'
begin
    insert #found_objects
    select a.id, c.str_no
    from   syscomments a, #search c
    where  patindex('%' + c.string + '%', lower( a.text ) ) > 0
    insert #found_objects
    select a.id, c.str_no
    from   syscomments a, syscomments b, #search c
    where  a.id        = b.id
    and    a.number    = b.number
    and    a.colid + 1 = b.colid
    and    patindex( '%' + c.string + '%', 
lower( right( a.text, @longest ) + 
substring( b.text, 1, @longest ) ) ) > 0  
end
else
begin
    insert #found_objects
    select a.id, c.str_no
    from   syscomments a, #search c
    where  patindex( '%' + c.string + '%', a.text ) > 0
    insert #found_objects
    select a.id, c.str_no
    from   syscomments a, syscomments b, #search c
    where  a.id        = b.id
    and    a.number    = b.number
    and    a.colid + 1 = b.colid
    and    patindex( '%' + c.string + '%', 
right( a.text, @longest ) + 
            substring( b.text, 1, @longest ) ) > 0
end
/* ------------------------------------------------------------------ */select distinct str_no, id into #dist_objects from #found_objects
create unique clustered index obj on #dist_objects  ( str_no, id )
/* Apply one operation at a time */select @i = 0
while @i < @str_no
begin
    select @i = @i + 1
    select @operation = operation from #search where str_no = @i
    
    if @operation = '+'
        insert #result
        select id
        from   #dist_objects 
        where  str_no = @i
    else if @operation = '-'
        delete #result
        from   #result a, #dist_objects b
        where  b.str_no = @i
        and    a.id = b.id
    else if @operation = '&'
        delete #result
        where  not exists 
                ( select 1
                  from   #dist_objects b
                  where  b.str_no = @i
                  and    b.id = #result.id )
end
/* Select results */select distinct id into #dist_result from #result
/* The following select has been borrowed from the sp_help 
** system stored procedure, and modified. */select  DISTINCT Name        = o.name,
        /* Remove 'convert(char(15)' in the following line 
        ** if user names on your server are longer. */        Owner       = convert( char(15), user_name(uid) ),
        Object_type = substring(v.name + x.name, 1, 16)
from    #dist_result           d,
        sysobjects             o, 
        master.dbo.spt_values  v,
        master.dbo.spt_values  x
where   d.id = o.id
/* SQL Server version 6.x uses 15, prior versions use 7 in expression below */and     o.sysstat & ( 7 + 8 * sign( charindex( '6.', @@version ) ) ) = v.number
and     v.type = "O"
and     x.type = "R"
and     o.userstat & -32768 = x.number
order by Object_type     , Name    


END --procedure

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