HEIDENHAIN MANUALplus 620 Technical Manual page 1633

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example for SQL

Read data from

January 2012

To determine the positions in a measuring cycle, calibration data of a touch

probe are to be transferred from the tchprobe.tp table.

The center offsets are indicated in the CAL_OF1 and CAL_OF2 columns.

BIND links the Q parameters with column names:

SQL BIND Q63 "TCHPROBE.CAL_OF1"

SQL BIND Q64 "TCHPROBE.CAL_OF2"

SELECT chooses those columns from the table (TNC:\table\tchprobe.tp)

that are to be assigned to the active touch probe (WHERE ACTNR==1):

SQL Q5 "SELECT CAL_OF1,CAL_OF2 FROM 'TNC:\table\tchprobe.tp' WHERE

FETCH reads a row from the result set (HANDLE Q5) and assigns the data

to the bound parameters. With INDEX0, the first row of the selected data is

SQL FETCH Q80 HANDLE Q5 INDEX0

Safety check (Q80 is equal to zero?)

The data is assigned to Q parameters:

ROLLBACK releases the selected data:

SQL ROLLBACK Q80 HANDLE Q5

Safety check (Q80 is equal to zero?)

Following that, the bindings are undone:

SQL BIND Q63

SQL BIND Q64