HEIDENHAIN TNC 640, User Manual, Page: 445 / 948

Programming Q Parameters | Accessing tables with SQL commands
10
HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
445
SQL UPDATE
Example: transferring row number in the Q parameter
11 SQL BIND Q881 "TAB_EXAMPLE.MESS_NR"
12 SQL BIND Q882 "TAB_EXAMPLE.MESS_X"
13 SQL BIND Q883 "TAB_EXAMPLE.MESS_Y"
14 SQL BIND Q884 "TAB_EXAMPLE.MESS_Z"
. . .
20 SQL Q5 "SELECT MESS_NR,MESS_X,MESS_Y,MESS_Z FROM
TAB_EXAMPLE"
. . .
30 SQL FETCH Q1 HANDLE Q5 INDEX+Q2
Example: programming the row number directly
. . .
40 SQL UPDATE Q1 HANDLE Q5 INDEX5
SQL UPDATE
changes a row in the
result set
(intermediate
memory). The new values of the individual cells are copied from
the bound Q parameters. The transaction is defined via the
HANDLE
to be specified; the row is defined via the
INDEX
. The
existing row in the
result set
is completely overwritten.
SQL UPDATE
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 for 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 assigned a value if none is
specified