• NAME Evaluator::Select
• DESCRIPTION
• METHODS
• evaluate(HashTable codeHash)

NAME Evaluator::Select

This is the code for the query evaluation of the SELECT statement.

DESCRIPTION

The SELECT statement evaluation proceeds by first determining a tuple from the variable assignments in the From clause. Then the WHERE clause predicate is applied, and if the tuple passes, the SELECT clause attributes are projected.

METHODS

evaluate(HashTable codeHash)

• codeHash
  
- A hash table of the clauses.

Evaluate the select clause.