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82 lines
2.6 KiB
Groff
82 lines
2.6 KiB
Groff
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.\" Automatically generated by Pandoc 2.5
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.\"
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.TH "mariadb_stmt_execute_direct" "3" "" "Version 3.2.2" "MariaDB Connector/C"
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.hy
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.SS Name
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.PP
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mariadb_stmt_execute_direct \- prepares and executes a prepared
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statement
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.SS Synopsis
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.IP
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.nf
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\f[C]
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#include <mysql.h>
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int mariadb_stmt_execute_direct(MYSQL_STMT * stmt,
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const char *query,
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size_t length);
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\f[R]
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.fi
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.SS Description
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.PP
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Prepares and executes a statement which was previously allocated by
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\f[B]mysql_stmt_init(3)\f[R], using the current values of the parameter
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variables if any parameters exist in the statement.
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.SS Parameters
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.IP \[bu] 2
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\f[C]stmt\f[R] \- A statement handle, which was previously allocated by
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\f[B]mysql_stmt_init(3)\f[R].
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.IP \[bu] 2
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\f[C]query\f[R] SQL statement
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.IP \[bu] 2
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\f[C]length\f[R] Length of SQL statement
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.SS Return value
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.PP
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Returns zero on success, non\-zero on failure.
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.SS Notes
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.IP \[bu] 2
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Since the number of parameter of the statement is unknown before
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execution it is mandatory to set the number of parameters via the
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\f[B]mysql_stmt_attr_set(3)\f[R] function.
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.IP \[bu] 2
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If the SQL statement is a zero\-terminated string, you can also pass
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\f[C]\-1\f[R] as length.
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.IP \[bu] 2
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The statement handle is intended for one\-time execution.
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Reusing the statement handle might lead to unexpected behavior.
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.SS History
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.PP
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This function was added in Connector/C 3.0 and requires MariaDB 10.2 or
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later versions.
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.SS See Also
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.IP \[bu] 2
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\f[B]mysql_stmt_attr_set(3)\f[R]
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.IP \[bu] 2
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\f[B]mysql_stmt_bind_param(3)\f[R]
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.SS Example
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.PP
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\[ga]\[ga]\[ga]C static int execute_direct_example(MYSQL \f[I]mysql) {
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MYSQL_STMT \f[R]stmt= mysql_stmt_init(mysql); MYSQL_BIND bind[2]; int
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intval= 1; int param_count= 2; char *strval=
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\[lq]execute_direct_example\[rq];
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.PP
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/* Direct execution without parameters */ if
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(mariadb_stmt_execute_direct(stmt, \[lq]CREATE TABLE execute_direct (a
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int, b varchar(30))\[rq], \-1)) goto error;
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.PP
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memset(&bind, 0, sizeof(MYSQL_BIND) * 2); bind[0].buffer_type=
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MYSQL_TYPE_SHORT; bind[0].buffer= &intval; bind[1].buffer_type=
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MYSQL_TYPE_STRING; bind[1].buffer= strval; bind[1].buffer_length=
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strlen(strval);
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.PP
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/* set number of parameters */ if (mysql_stmt_attr_set(stmt,
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STMT_ATTR_PREBIND_PARAMS, ¶m_count)) goto error;
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.PP
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/* bind parameters */ if (mysql_stmt_bind_param(stmt, bind)) goto error;
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.PP
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if (mariadb_stmt_execute_direct(stmt, \[lq]INSERT INTO execute_direct
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VALUES (?,?)\[rq], \-1)) goto error;
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.PP
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mysql_stmt_close(stmt); return 0; error: printf(\[lq]Error: %s\[rq],
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mysql_stmt_error(stmt)); mysql_stmt_close(stmt); return 1; }
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