* Avoid using temp tables and DDL statements

This can cause stored procedure recompile when temp table, created in stored procedure, get referenced first time within stored procedure. Due to non-existense of statistics optimizer will not be able to reuse or create execution plan for queries using temp table which is created within stored procedure. Same applies on DDL statement as they also force stored procedure to recompile.

When a batch is recompiled in SQL Server 2000, all of the statements in the batch are recompiled, not just the one that triggered the recompilation. SQL Server 2005 improves upon this behavior by compiling only the statement that caused the recompilation, not the entire batch. This “statement-level recompilation” feature will improve SQL Server 2005’s recompilation behavior when compared to that of SQL Server 2000. In particular, SQL Server 2005 spends less CPU time and memory during batch recompilations, and obtains fewer compile locks.