Module: DbAgile::Contract::Data::TransactionDriven

Included in:
Utils::Full
Defined in:
lib/dbagile/contract/data/transaction_driven.rb

Overview

Transaction driven methods of the contract

Instance Method Summary collapse

Instance Method Details

#delete(transaction, table_name, proj = {}) ⇒ Object

Delete all tuples whose projection equal proj inside a given table

Parameters:

  • transaction (Transaction) —

    the current transaction

  • table_name (Symbol) —

    the name of a table

  • proj (Hash) (defaults to: {}) —

    a projection tuple



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# File 'lib/dbagile/contract/data/transaction_driven.rb', line 54

def delete(transaction, table_name, proj = {})
  Kernel.raise NotImplementedError
end

#direct_sql(transaction, sql) ⇒ ...

Send SQL directly to the database SQL server.

Returned result is left opened to adapters.

Parameters:

  • transaction (Transaction) —

    the current transaction

  • sql (String) —

    a SQL query

Returns:

  • (...) —

    adapter defined



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# File 'lib/dbagile/contract/data/transaction_driven.rb', line 67

def direct_sql(transaction, sql)
  Kernel.raise NotImplementedError
end

#insert(transaction, table_name, record) ⇒ Hash

Inserts a tuple inside a given table

Parameters:

  • transaction (Transaction) —

    the current transaction

  • table_name (Symbol) —

    the name of a table

  • record (Hash) —

    a record as a hash (column_name -> value)

Returns:

  • (Hash) —

    inserted record as a hash



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# File 'lib/dbagile/contract/data/transaction_driven.rb', line 21

def insert(transaction, table_name, record)
  Kernel.raise NotImplementedError
end

#update(transaction, table_name, update, proj = {}) ⇒ Hash

Updates all tuples whose projection equal proj with values given by update inside a given table

Parameters:

  • transaction (Transaction) —

    the current transaction

  • table_name (Symbol) —

    the name of a table

  • proj (Hash) (defaults to: {}) —

    a projection tuple

Returns:

  • (Hash) —

    update the new values for tuples



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# File 'lib/dbagile/contract/data/transaction_driven.rb', line 39

def update(transaction, table_name, update, proj = {})
  Kernel.raise NotImplementedError
end