(mysql.info) c-api-prepared-statements

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(mysql.info) c-api-prepared-statement-datatypes

 
 22.2.4 C API Prepared Statements
 --------------------------------
 
 The MySQL client/server protocol provides for the use of prepared
 statements. This capability uses the `MYSQL_STMT' statement handler
 data structure returned by the `mysql_stmt_init()' initialization
 function. Prepared execution is an efficient way to execute a statement
 more than once. The statement is first parsed to prepare it for
 execution. Then it is executed one or more times at a later time, using
 the statement handle returned by the initialization function.
 
 Prepared execution is faster than direct execution for statements
 executed more than once, primarily because the query is parsed only
 once. In the case of direct execution, the query is parsed every time
 it is executed. Prepared execution also can provide a reduction of
 network traffic because for each execution of the prepared statement,
 it is necessary only to send the data for the parameters.
 
 Another advantage of prepared statements is that it uses a binary
 protocol that makes data transfer between client and server more
 efficient.
 
 The following statements can be used as prepared statements: `CREATE
 TABLE', `DELETE', `DO', `INSERT', `REPLACE', `SELECT', `SET', `UPDATE',
 and most `SHOW' statements. Other statements are not supported in MySQL
 5.0.
 

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(mysql.info) c-api-prepared-statement-datatypes