Example Of Explain Statement Using Odbc - HP Neoview SQL Reference Manual

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Example of EXPLAIN Statement Using ODBC

Suppose an application prepares a SELECT statement: "SELECT * FROM

ODBC_PERSNL.EMPLOYEE". Use SQLGetCursorName to find the statement name. In this

example, the returned statement name is "SQL_CUR_21".

To get the plan for "SELECT * FROM ODBC_PERSNL.EMPLOYEE", the application must allocate

another statement handle and issue SQLExecDirect on "EXPLAIN options 'f' SQL_CUR_21".

The plan is returned as a result-set. Use SQLFetch to retrieve the result.

SQLPrepare: StatementText = " SELECT * FROM ODBC_PERSNL.EMPLOYEE;"

SQLGetCursorName: Out:*CursorName = "SQL_CUR_21"

SQLAllocHandle: HandleType = SQL_HANDLE_STMT=3

SQLExecDirect: StatementText = "EXPLAIN options 'f' "SQL_CUR_21"

In: StatementHandle = 0x003B1A10,

StatementText = "select * from odbc_persnl.employee;", TextLength = 35

Return: SQL_SUCCESS=0

SQL Statements