T-FLEX Parametric CAD. Fundamentals. 2D Design

Fundamentals. Two-Dimensional Design
500
It is worth noting that the last operand of the function, specifying
condition for record selection, can be written in the form of SQL
query and then it must correspond to the WHERE clause of the
SELECT command.
If, upon writing the condition, the text variables are used, the
expression will take the following form:
mdb ( "c:\\T-FLEX_USER.mdb", "USER", "FULLNAME",
"Post=\"{$Dol}\"" ).
REC(condition) Get the Id of a record in the internal database.
condition – a logical expression, taking values True or False.
The expression may contain members – queries to the fields of the
database.
FREC(arg1, arg2, arg3,
arg4)
VAL(record_number,
database_field)
Get the Id of a record in the internal database or in the database by
reference, where the value in the specified column matches most
closely the specified value.
arg1 – a database column, in which the search is performed. Must
be of real or integer type;
arg2 –sought value;
arg3 –search option. Possible values:
0 –find nearest value;
-1 –find nearest lesser value;
1 –find nearest greater value.
arg4 –defines the column type to perform the search (the order in
which the values occur in this column):
0 -the values are not in order; the search is performed over
all database records;
1 –the values in the column are ordered ascending or
descending.
Once the difference between the value sought and the value in the
current column of the database is greater than in the previous one,
the search completes.
The parameters arg3 and arg4 are optional. If these are skipped, the
default values are used:
arg3 = 0; search for nearest value;
arg4 = 0; column not ordered;
Get the value from the internal database by the record Id.
record_number -an arbitrary arithmetical expression, that yields
an integer.
database_field -a field query.
#. Get the number of records in the specified internal database