Connection Descriptor

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Connection Descriptor

A DataBlade API module (C UDR or client LIBMI application) obtains access to the session context through a connection descriptor, MI_CONNECTION. This descriptor is an opaque C data structure that points to the threadsafe context-sensitive portion of the session information. The session context includes the information in Table 44.

Table 44. Session-Context Information in a Connection Descriptor
Connection Information	More Information
Save sets	Using Save Sets
Statement descriptors: For SQL statement, last executed with mi_exec( ) For prepared statements	Executing Basic SQL Statements Executing Prepared SQL Statements
Cursors (implicit and explicit)	Queries and Implicit Cursors and Defining an Explicit Cursor
Resources for the current row of the current statement: Row descriptor Row structure	Retrieving Query Data
Function descriptors	Obtaining a Function Descriptor
Callbacks registered for the connection	Registering a Callback
User data	Associating User Data with a Connection
The integer byte order of the client computer	Conversion of Opaque-Type Data with Computer-Specific Data Types

You obtain a connection descriptor when you establish a connection in the DataBlade API module. For more information, see Establishing a Connection.