Creating procedure inside IF section

Question

I need some help with simple SQL code:

DECLARE @procExists int
SET @procExists = (SELECT COUNT(*) FROM INFORMATION_SCHEMA.ROUTINES WHERE ROUTINE_SCHEMA = \'d         


        

Answer 1

CREATE PROCEDURE has to be in it's own batch

So, dynamic SQL is one way:

IF OBJECT_ID('Table_Exists') IS NULL
BEGIN
    EXEC ('CREATE PROCEDURE Table_Exists
         @schemaName varchar(50),
         @tableName varchar(50)
     AS
         RETURN (SELECT COUNT(*) FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = @schemaName AND TABLE_NAME = @tableName)
')
END

or DROP first

IF OBJECT_ID('Table_Exists') IS NOT NULL
  DROP PROC Table_Exists
GO
CREATE PROCEDURE Table_Exists
         @schemaName varchar(50),
         @tableName varchar(50)
     AS
         RETURN (SELECT COUNT(*) FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = @schemaName AND TABLE_NAME = @tableName)
GO

Note the use of OBJECT_ID to see if the proc exists.