precedence lossage - definizione. Che cos'è precedence lossage
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Cosa (chi) è precedence lossage - definizione

GRAPH OF DATABASE TRANSACTIONS RECORDING PRECEDENCE AND CONFLICTS
Precedence Graph; Precedence Graphs; Precedence graphs
  • Example 1
  • Testing Serializability Example

precedence lossage      
/pre's*-dens los'*j/ A misunderstanding of {operator precedence} resulting in unintended grouping of arithmetic or logical operators when coding an expression. Used especially of mistakes in C code due to the nonintuitively low precedence of "&", "|", "^", "<<" and ">>". For example, the following C expression, intended to test the least significant bit of x, x & 1 == 0 is parsed as x & (1 == 0) which is always zero (false). Some lazy programmers ignore precedence and parenthesise everything. Lisp fans enjoy pointing out that this can't happen in *their* favourite language, which eschews precedence entirely, requiring one to use explicit parentheses everywhere. [Jargon File] (1994-12-16)
Canadian order of precedence         
OVERVIEW ABOUT THE ORDER OF PRECEDENCE IN CANADA
Canadian Order of Precedence; Order of Precedence of Canada; Order of Precedence in Canada
The Canadian order of precedence is a nominal and symbolic hierarchy of important positions within the governing institutions of Canada. It has no legal standing but is used to dictate ceremonial protocol.
Italian order of precedence         
OVERVIEW ABOUT THE ORDER OF PRECEDENCE IN ITALY
Italian Order of Precedence
The Italian order of precedence is fixed by Decree of the President of the Council of Ministers (D.P.

Wikipedia

Precedence graph

A precedence graph, also named conflict graph and serializability graph, is used in the context of concurrency control in databases.

The precedence graph for a schedule S contains:

  • A node for each committed transaction in S
  • An arc from Ti to Tj if an action of Ti precedes and conflicts with one of Tj's actions. That is the actions belong to different transactions, at least one of the actions is a write operation, and the actions access the same object (read or write).