Class: Exwiw::QueryAst::Select

Inherits:
Object
  • Object
show all
Defined in:
lib/exwiw/query_ast.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Select

Returns a new instance of Select.



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# File 'lib/exwiw/query_ast.rb', line 50

def initialize
  @from_table_name = nil
  @columns = []
  @where_clauses = []
  @join_clauses = []
  @select_all = false
end

Instance Attribute Details

#columns ⇒ Object (readonly)

Returns the value of attribute columns.



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# File 'lib/exwiw/query_ast.rb', line 48

def columns
  @columns
end

#from_table_name ⇒ Object (readonly)

Returns the value of attribute from_table_name.



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# File 'lib/exwiw/query_ast.rb', line 48

def from_table_name
  @from_table_name
end

#join_clauses ⇒ Object (readonly)

Returns the value of attribute join_clauses.



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# File 'lib/exwiw/query_ast.rb', line 48

def join_clauses
  @join_clauses
end

#select_all ⇒ Object (readonly)

Returns the value of attribute select_all.



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# File 'lib/exwiw/query_ast.rb', line 48

def select_all
  @select_all
end

#where_clauses ⇒ Object (readonly)

Returns the value of attribute where_clauses.



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# File 'lib/exwiw/query_ast.rb', line 48

def where_clauses
  @where_clauses
end

Instance Method Details

#from(table) ⇒ Object 



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# File 'lib/exwiw/query_ast.rb', line 58

def from(table)
  @from_table_name = table
end

#join(join_clause) ⇒ Object 



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# File 'lib/exwiw/query_ast.rb', line 74

def join(join_clause)
  @join_clauses << join_clause
end

#select(columns) ⇒ Object 



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# File 'lib/exwiw/query_ast.rb', line 62

def select(columns)
  @columns = map_column_value(columns)
end

#select_all! ⇒ Object 



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# File 'lib/exwiw/query_ast.rb', line 66

def select_all!
  @select_all = true
end

#where(where_clause) ⇒ Object 



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# File 'lib/exwiw/query_ast.rb', line 70

def where(where_clause)
  @where_clauses << where_clause
end