ChemOffice.Com - CambridgeSoft

Administrator
It is important to remember, when creating an
index in a different schema, then the logged-on
user, both the index name and the table name must
be qualified by the schema name. Otherwise, the
cartridge will not connect its tables to the original
table.
For example:
CREATE INDEX mx ON
USER1.moltable(mol)...
is incorrect. The correct format is:
CREATE INDEX USER1.mx ON
USER1.moltable(mol)...
NOTE: Creating an index may be time consuming if the
table already contains lots of records when the index is
created.
DML Considerations
DML (Data Manipulation Language) statements
include statements used to manipulate data.
Examples include (but are not limited to) SELECT,
INSERT, DELETE, and UPDATE.
Data maintenance related to the cartridge is for the
most part automatic, and no extra work is required.
Every time a record is inserted into a table
containing an indexed field, the cartridge is
automatically invoked by the Oracle server. The
cartridge is also invoked if a record is deleted, or if
an indexed field storing a chemical structure is
updated.
Fast Substructure Search
Fast substructure search can be invoked by the
MoleculeContains operator in a SELECT
statement as follows:
SELECT ... FROM tab WHERE
CsCartridge.MoleculeContains(fld
, query4000, query8000,
options)=1
where:
tab - is the name of the table to be retrieved
fld - is the name of the field indexed by the
cartridge
query4000 - is the first 4000 characters of the
query string. The query string can be an
encoded CDX document, a SMILES string, or
a MolFile. For more information about these
formats, please see “DDL Considerations” on
page 188. The Oracle server limits the size of
string literals to 4000 characters.
query8000 - is the second 4000 characters of
the query string. Queries exceeding the 8000
character limits will fail. Since CDX documents
can be voluminous, this limitation may become
important. However even in this case, an 8000
byte limit should not impose too much of a
restriction.
options - is a string containing keyword=value
pairs separated by commas. The interpreted
keywords are:
ABSOLUTEHITSREL=[YES | NO] -
Default is NO
COMPLETE= - to limit the
number of hits tested against atom by atom
matching
DOUBLEBONDSTEREO=[YES|NO] -
double bond stereo matching. Default is
YES.
FRAGMENTSOVERLAP=[YES|NO] -
fragments can overlap. Default is NO.
FULL=[YES|NO] - to specify full
structure search. Default is substructure
search
HITANYCHARGECARBON=[YES|NO] -
hit any charged carbon. Default is YES.
HITANYCHARGEHETERO=[YES|NO] -
hit any charged hetero atom option. Default
is YES.
190•CS Oracle Cartridge
CambridgeSoft
DML Considerations