HEIDENHAIN TNC 620 User Manual page 333

9.9 Accessing tables with SQL
commands
Introduction
Accessing of tables is programmed on the TNC with SQL
commands in transactions. A transaction consists of multiple SQL
commands that guarantee an orderly execution of the table entries.
Tables are configured by the machine manufacturer.
Names and designations required as parameters for
SQL commands are also specified.
The following terms are used:
Table: A table consists of x columns and y rows. It is saved as
a file in the File Manager of the TNC, and is addressed with the
path and file name (= table name). Synonyms can also be used
for addressing, as an alternative to the path and file name
Columns: The number and names of the columns are specified
when configuring the table. The column name is used for
addressing in various SQL commands
Rows: The number of rows is variable. You can insert new
rows. There are no row numbers or other designators. However,
you can select rows based on the contents of a column. Rows
can only be deleted in the table editor, not by an NC program
Cell: The column in a row
Table entry: Content of a cell
Result set: During a transaction, the selected columns and
rows are managed in the result set. You can view the result set
as a sort of "intermediate memory," which temporarily assumes
the set of selected columns and rows. Result set
Synonym: This term defines a name used for a table instead of
its path and file name. Synonyms are specified by the machine
manufacturer in the configuration data
HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2015
Accessing tables with SQL commands
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