Trait odbc_api::parameter::InputParameter

source · [−]
pub unsafe trait InputParameter: HasDataType + CData { }
Expand description

Use implementations of this type as arguments to SQL Statements.

Safety

Considerations for implementers

Extend the crate::handles::HasDataType trait with the guarantee, that the bound parameter buffer contains at least one element.

Since the indicator provided by implementation is used to indicate the length of the value in the buffer, care must be taken to prevent out of bounds access in case the implementation also is used as an output parameter, and contains truncated values (i.e. the indicator is longer than the buffer and the value within).

Trait Implementations

The identifier of the C data type of the value buffer. When it is retrieving data from the data source with fetch, the driver converts the data to this type. When it sends data to the source, the driver converts the data from this type. Read more

Indicates the length of variable sized types. May be zero for fixed sized types. Used to determine the size or existence of input parameters. Read more

Pointer to a value corresponding to the one described by cdata_type.

Maximum length of the type in bytes (not characters). It is required to index values in bound buffers, if more than one parameter is bound. Can be set to zero for types not bound as parameter arrays, i.e. CStr. Read more

The SQL data as which the parameter is bound to ODBC.

Implementations on Foreign Types

Implementors