Sql Fetch - HEIDENHAIN TNC 620 User Manual

Programming Q Parameters | Accessing tables with SQL commands

SQL FETCH

Example: transferring row number in the Q parameter
11 SQL BIND Q881 "Tab_Example.Meas_No"
12 SQL BIND Q882 "Tab_Example.Meas_X"
13 SQL BIND Q883 "Tab_Example.Meas_Y"
14 SQL BIND Q884 "Tab_Example.Meas_Z"
. . .
20 SQL Q5 "SELECT Meas_no,Meas_X,Meas_Y, Meas_Z FROM
Tab_Example"
. . .
30 SQL FETCH Q1 HANDLE Q5 INDEX+Q2
Example: programming the row number directly
. . .
30 SQL FETCH Q1 HANDLE Q5 INDEX5
SQL FETCH reads a row out of the result-set (intermediate
memory). The values of the individual cells are stored in the bound
Q parameters. The transaction is defined via the HANDLE to be
specified; the row is defined via the INDEX.
SQL FETCH takes all columns into consideration that were
specified with the SELECT instruction (SQL command SQL
EXECUTE).
Parameter No. for result (return value for the
control):
0 successful transaction
1 successful transaction
Database: SQL access ID: define Q parameters
for the HANDLE (for identifying the transaction)
Database: index to SQL result: row number
within the result set
Program the row number directly
Program the Q parameter containing the
index
The row (n=0) is read if nothing is specified
The optional syntax elements IGNORE UNBOUND and
UNDEFINE MISSING are intended for the machine tool
builder.
HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2017
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