Follow Techotopia on Twitter

On-line Guides
All Guides
eBook Store
iOS / Android
Linux for Beginners
Office Productivity
Linux Installation
Linux Security
Linux Utilities
Linux Virtualization
Linux Kernel
System/Network Admin
Programming
Scripting Languages
Development Tools
Web Development
GUI Toolkits/Desktop
Databases
Mail Systems
openSolaris
Eclipse Documentation
Techotopia.com
Virtuatopia.com
Answertopia.com

How To Guides
Virtualization
General System Admin
Linux Security
Linux Filesystems
Web Servers
Graphics & Desktop
PC Hardware
Windows
Problem Solutions
Privacy Policy

  




 

 

25.2.7.20. mysql_stmt_prepare()

int mysql_stmt_prepare(MYSQL_STMT *stmt, const char *query, unsigned long length)

Description

Given the statement handle returned by mysql_stmt_init(), prepares the SQL statement pointed to by the string query and returns a status value. The string length should be given by the length argument. The string must consist of a single SQL statement. You should not add a terminating semicolon (‘;’) or \g to the statement.

The application can include one or more parameter markers in the SQL statement by embedding question mark (‘?’) characters into the SQL string at the appropriate positions.

The markers are legal only in certain places in SQL statements. For example, they are allowed in the VALUES() list of an INSERT statement (to specify column values for a row), or in a comparison with a column in a WHERE clause to specify a comparison value. However, they are not allowed for identifiers (such as table or column names), or to specify both operands of a binary operator such as the = equal sign. The latter restriction is necessary because it would be impossible to determine the parameter type. In general, parameters are legal only in Data Manipulation Language (DML) statements, and not in Data Definition Language (DDL) statements.

The parameter markers must be bound to application variables using mysql_stmt_bind_param() before executing the statement.

Return Values

Zero if the statement was prepared successfully. Non-zero if an error occurred.

Errors

  • CR_COMMANDS_OUT_OF_SYNC

    Commands were executed in an improper order.

  • CR_OUT_OF_MEMORY

    Out of memory.

  • CR_SERVER_GONE_ERROR

    The MySQL server has gone away.

  • CR_SERVER_LOST

    The connection to the server was lost during the query

  • CR_UNKNOWN_ERROR

    An unknown error occurred.

If the prepare operation was unsuccessful (that is, mysql_stmt_prepare() returns non-zero), the error message can be obtained by calling mysql_stmt_error().

Example

For the usage of mysql_stmt_prepare(), refer to the Example from Section 25.2.7.10, “mysql_stmt_execute().


 
 
  Published under the terms of the GNU General Public License Design by Interspire