python: Adodb Function Reference

Submitted by wd on Wed, 2007-01-24 11:00
Topic: 
python
adodb
 

Connection Class

Execute(sql, [params])
Execute sql, returning a cursor object. The
optional params is a dictionary that contains the bind
variables. All blob fields are automatically and transparently
retrieved for you.
SelectLimit(sql, limit, [offset])
Execute sql, retrieving only limit rows, an
optional offset from the beginning of the recordset, returning
a cursor object.
UpdateBlob(table, field, blob, whereclause, blobtype='BLOB')

Executes the equivalent following sql statement:

UPDATE table SET field = blob WHERE whereclause

The blobtype field should be set to either 'BLOB' or 'CLOB'.
Any special encoding required for the blob is applied
transparently.

UpdateBlobFile(table, field, filepath, whereclause, blobtype='BLOB')

Loads the binary file filepath into blob. Then
calls UpdateBlob( ).

ErrorMsg( )
Returns last database error message. This function is not
thread-safe.
IsConnected( )
Returns boolean indicating whether connected.
qstr(str)
Quotes a varchar or char variable.
quote(str)
Synonym for qstr( )
GetAll(sql)
Execute sql and return 2-dimensional array of tuples, the
data recordset.
GetArray(sql)
Synonym for GetAll(sql).
GetRow(sql)
Execute sql and return first row of recordset as a tuple.
GetOne(sql)
Execute sql and return 1 element of first row of recordset.
GetAssoc(sql)
Returns a dictionary, with the first columns as the keys to
the dictionary. If more than 2 columns are returned, then the
dictionary values is a tuple of the 2nd to last columns. If 2 columns
are returned, then the 2nd column becomes the dictionary values. If one
column is returned, then the values are set to None.
GetDict(sql)
Synonym for GetAssoc().
GetCol(sql)
Returns the first column of each row as an array.
MetaType(fieldtype)
Returns the ADOdb metatype of a native field type.

  • C: character fields that fit into a text input field.
  • X: larger character fields that fit into a textarea.
  • B: Blobs, or Binary Large Objects. Typically images.
  • D: Date field
  • T: Timestamp field
  • L: Logical field (boolean or bit-field)
  • I:  Integer field
  • N: Numeric field. Includes autoincrement, numeric,
    floating point, real and integer.
MetaColumns(table)
Returns a 2-dimensional array containing information on the
fields of a table. Each row contains [fieldname, fieldtype, maxlength].
Maxlength can be -1, indicating that the maximum length is not known.

Note that some databases return more information in each row.

DBDate(datetime)
Given a Python 2.3 datetime object, convert into a date
string acceptable to the database.
DBTimeStamp(datetime)
Given a Python 2.3 datetime object, convert into a timestamp
string acceptable to the database.
Date(field)
Converts a date returned by a select statement into a Python
2.3 datetime object
TimeStamp(field)
Converts a timestamp returned by a select statement into a
Python 2.3 datetime object
BeginTrans( )
ADOdb defaults to auto-commit mode. Call BeginTrans( ) to
start a transaction. This might not be thread-safe.
RollbackTrans( )
Rollback transaction initiated by BeginTrans( ).
CommitTrans( )
Commit transaction initiated by BeginTrans( ).
Close( )
Close database connection. This is optional, as the
connection is closed when the object is freed.
Module( )
Returns the DB module object.
Conn( )
Returns DB connection object.
DriverInfo( )
Returns the threadsafety, apilevel and paramstyle values

Connection Class Properties

debug
Set to 1 to output SQL generated to stdout. Set to 2 to
output to stdout as HTML. Set to a filepath (a string) if you want the
debug output to be logged into a file.
getLOBs
Boolean that determines whether LOBs (large data objects) are
loaded automatically. Default is True, autoload. For best performance
(especially for cursors with no LOBs), set this to False.
sysDate
SQL to generate current date.
sysTimeStamp
SQL to generate current timestamp.

Cursor Class Functions

RecordCount( )
Number of rows returned by SELECT statement, or number of
rows affected by INSERT/UPDATE/DELETE. Returns -1 if not supported.
Affected_Rows( )
Synonym for RecordCount( ).
MoveNext( )
Move to next row of recordset. Returns current EOF value.
FetchRow( )
Retrieves the current row of the recordset, then moves to the
next row. The row retrieved is returned as a tuple.
GetRowAssoc(upper=1)
Returns the current row as a dictionary, with the key's being
the field names. Setting upper = 0 will lower-case the keys.
Setting upper=1 will upper-case the keys. Setting upper
to any other value, and the keys will be left in the natural case.
Insert_ID( )
Returns last insert id generated by an auto-incrementing
field. Only supported by mysql and odbc_mssql drivers
currently.
FetchField(fieldoffset)

Returns field information from a SELECT statement. The fieldoffset
is zero-based, so to retrieve info on the 1st field use FetchField(0).
A tuple is returned, consisting of:

(name, type_code,display_size, internal_size, precision,
scale,null_ok).

Close( )
Close cursor. This is optional, as the cursor is closed when
the object is freed.
Cursor( )
Returns DB cursor object.

Cursor Class Properties

fields
Property that holds the current row of the recordset as a
tuple (or list).
EOF
When moving true the recordset, EOF is set to True after we
pass the last row.

 

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