What Is Query Rewrite Phase?

1.	What Is Query Rewrite Phase?
Answer» In this phase ,the parse TREE is converted into an ABSTRACT logical query plan. This is an INITIAL pass at an actual query plan, and it contains only a general algebraic reformulation of the initial query. The VARIOUS nodes and branches of the parse tree are replaced by OPERATORS of relational algebra. In this phase ,the parse tree is converted into an abstract logical query plan. This is an initial pass at an actual query plan, and it contains only a general algebraic reformulation of the initial query. The various nodes and branches of the parse tree are replaced by operators of relational algebra.

Answer»

In this phase ,the parse TREE is converted into an ABSTRACT logical query plan. This is an INITIAL pass at an actual query plan, and it contains only a general algebraic reformulation of the initial query. The VARIOUS nodes and branches of the parse tree are replaced by OPERATORS of relational algebra.

In this phase ,the parse tree is converted into an abstract logical query plan. This is an initial pass at an actual query plan, and it contains only a general algebraic reformulation of the initial query. The various nodes and branches of the parse tree are replaced by operators of relational algebra.

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