Invalid column name on sql server update after column create

Question

Does anyone see what\'s wrong with this code for SQL Server?

IF NOT EXISTS(SELECT *
              FROM   sys.columns
              WHERE  Name = \'OPT_LOCK\'         


        

Answer 1

For your information,you can replace the IF NOT EXISTS with the COL_LENGTH function. It takes two parameters,

1. Table Name and

2. Column you are searching for

If the Column is found then it returns the range of the datatype of the column Ex: Int (4 bytes), when not found then it returns a NULL.

So, you could use this as follows and also combine 3 Statements into one.

IF (SELECT COL_LENGTH('REP_DSGN_SEC_GRP_LNK','OPT_LOCK')) IS NULL

BEGIN

    ALTER TABLE REP_DSGN_SEC_GRP_LNK
    ADD OPT_LOCK NUMERIC(10, 0) NOT NULL DEFAULT 0

END;

Makes it simpler.