当我调试/开发动态代码时，我倾向于使用print语句来查看代码哪里出错。我分解了这个过程，然后打印包含动态sql的变量。也可以使用调试器。
所发生的是，在动态代码中，您正在搜索一个不存在的列。这是因为缺少额外的引号来转换为字符串。下面是我在northwind数据库上使用您的过程并搜索“cat”时的第一位动态代码的打印。

if exists (SELECT name 
            FROM SYSOBJECTS 
            WHERE xtype = 'U' 
-- SQL server sees [dbo].[Categories] as a non existing column
            and name like trim(']' from SUBSTRING([dbo].[Categories] , 8, 100))) 
            BEGIN 
            SELECT '[dbo].[Categories].[CategoryID]', LEFT([CategoryID], 3630) 
                FROM [dbo].[Categories] (NOLOCK)  WHERE 
                [CategoryID] = 1 END
               ELSE
                BEGIN SELECT '[dbo].[Categories].[CategoryID]', LEFT([CategoryID], 3630) 
                FROM [dbo].[Categories] (NOLOCK)  WHERE [CategoryID] LIKE '%cat%' END

下面是对代码的两个修改，以使其正常工作。额外的引号和一个额外的变量，它去掉了模式，因为模式不在您要查找的表的name列中。

ALTER PROC [dbo].[SearchAllTables]
(
    @SearchStr nvarchar(100),
    @SearchInt int = 0
)
AS
BEGIN

-- Copyright © 2002 Narayana Vyas Kondreddi. All rights reserved.
-- Purpose: To search all columns of all tables for a given search string
-- Written by: Narayana Vyas Kondreddi
-- Site: http://vyaskn.tripod.com
-- Tested on: SQL Server 7.0 and SQL Server 2000
-- Date modified: 28th July 2002 22:50 GMT

DECLARE @Results TABLE(ColumnName nvarchar(370), ColumnValue nvarchar(3630))

SET NOCOUNT ON

DECLARE @TableName nvarchar(256), @ColumnName nvarchar(128), @SearchStr2 nvarchar(110), @TableNoSchema nvarchar(256)
SET  @TableName = ''
SET @SearchStr2 = QUOTENAME('%' + @SearchStr + '%','''')

WHILE @TableName IS NOT NULL
BEGIN
    SET @ColumnName = ''
    SET @TableName = 
    (
        SELECT MIN(QUOTENAME(TABLE_SCHEMA) + '.' + QUOTENAME(TABLE_NAME))
        FROM    INFORMATION_SCHEMA.TABLES
        WHERE       TABLE_TYPE = 'BASE TABLE'
            AND QUOTENAME(TABLE_SCHEMA) + '.' + QUOTENAME(TABLE_NAME) > @TableName
            AND OBJECTPROPERTY(
                    OBJECT_ID(
                        QUOTENAME(TABLE_SCHEMA) + '.' + QUOTENAME(TABLE_NAME)
                         ), 'IsMSShipped'
                           ) = 0
    )
    -- Since the table used below in the dynamic SQL does not have a prepended schema is strip it here
    SET @TableNoSchema = SUBSTRING(@TableName, CHARINDEX('.',@TableName) + 2, LEN(@TableName) - CHARINDEX('.',@TableName) -2 )

    WHILE (@TableName IS NOT NULL) AND (@ColumnName IS NOT NULL)
    BEGIN
        SET @ColumnName =
        (
            SELECT MIN(QUOTENAME(COLUMN_NAME))
            FROM    INFORMATION_SCHEMA.COLUMNS
            WHERE       TABLE_SCHEMA    = PARSENAME(@TableName, 2)
                AND TABLE_NAME  = PARSENAME(@TableName, 1)
                AND DATA_TYPE IN ('char', 'varchar', 'nchar', 'nvarchar', 'int')
                AND QUOTENAME(COLUMN_NAME) > @ColumnName
        )

        IF @ColumnName IS NOT NULL
        BEGIN
            INSERT INTO @Results
            EXEC -- only added extra quotes so SQL server sees a string instead of a column
            (
                'if exists (SELECT name FROM SYSOBJECTS WHERE xtype = ''U'' and name like trim('']'' from SUBSTRING(''' + @TableNoSchema + ''' , 8, 100))) BEGIN '
               +'SELECT ''' + @TableName + '.' + @ColumnName + ''', LEFT(' + @ColumnName + ', 3630) 
                FROM ' + @TableName + ' (NOLOCK) ' +
                ' WHERE ' + @ColumnName + ' = ' + @SearchInt
               +' END
               ELSE
                BEGIN '
               +
                'SELECT ''' + @TableName + '.' + @ColumnName + ''', LEFT(' + @ColumnName + ', 3630) 
                FROM ' + @TableName + ' (NOLOCK) ' +
                ' WHERE ' + @ColumnName + ' LIKE ' + @SearchStr2
                +' END'
            )
        END
    END 
END

SELECT ColumnName, ColumnValue FROM @Results
END