lsst.daf.persistence g17e5ecfddb+10d12767ef
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Public Member Functions | |
def | __init__ (self, conn) |
def | __del__ (self) |
def | lookup (self, lookupProperties, reference, dataId, **kwargs) |
def | executeQuery (self, returnFields, joinClause, whereFields, range, values) |
Public Attributes | |
conn | |
Static Public Attributes | |
string | placeHolder = "?" |
A base class for SQL-based registries Subclasses should define the class variable `placeHolder` (the particular placeholder to use for parameter substitution) appropriately. The database's python module should define `paramstyle` (see PEP 249), which would indicate what to use for a placeholder: * paramstyle = "qmark" --> placeHolder = "?" * paramstyle = "format" --> placeHolder = "%s" Other `paramstyle` values are not currently supported. Constructor parameters ---------------------- conn : DBAPI connection object Connection object
Definition at line 286 of file registries.py.
def lsst.daf.persistence.registries.SqlRegistry.__init__ | ( | self, | |
conn | |||
) |
Constructor. Parameters ---------- conn : DBAPI connection object Connection object
Reimplemented from lsst.daf.persistence.registries.Registry.
Reimplemented in lsst.daf.persistence.registries.SqliteRegistry, and lsst.daf.persistence.registries.PgsqlRegistry.
Definition at line 304 of file registries.py.
def lsst.daf.persistence.registries.SqlRegistry.__del__ | ( | self | ) |
Reimplemented from lsst.daf.persistence.registries.Registry.
Definition at line 315 of file registries.py.
def lsst.daf.persistence.registries.SqlRegistry.executeQuery | ( | self, | |
returnFields, | |||
joinClause, | |||
whereFields, | |||
range, | |||
values | |||
) |
Extract metadata from the registry. @param returnFields (list of strings) Metadata fields to be extracted. @param joinClause (list of strings) Tables in which metadata fields are located. @param whereFields (list of tuples) First tuple element is metadata field to query; second is the value that field must have (often '?'). @param range (tuple) Value, lower limit, and upper limit for a range condition on the metadata. Any of these can be metadata fields. @param values (tuple) Tuple of values to be substituted for '?' characters in the whereFields values or the range values. @return (list of tuples) All sets of field values that meet the criteria
Definition at line 401 of file registries.py.
def lsst.daf.persistence.registries.SqlRegistry.lookup | ( | self, | |
lookupProperties, | |||
reference, | |||
dataId, | |||
** | kwargs | ||
) |
Perform a lookup in the registry. Return values are refined by the values in dataId. Returns a list of values that match keys in lookupProperties. e.g. if the template is 'raw/raw_v%(visit)d_f%(filter)s.fits.gz', and dataId={'visit':1}, and lookupProperties is ['filter'], and the filesystem under self.root has exactly one file 'raw/raw_v1_fg.fits.gz' then the return value will be [('g',)] :param lookupProperties: :param dataId: must be a key/value iterable. Keys must be string. If value is a string then will look for elements in the repository that match value for value. If value is a 2-item iterable then will look for elements in the repository where the value is between the values of value[0] and value[1]. :param reference: other data types that may be used to search for values. :param **kwargs: nothing needed for sqlite lookup :return: a list of values that match keys in lookupProperties.
Reimplemented in lsst.daf.persistence.registries.PgsqlRegistry.
Definition at line 370 of file registries.py.
lsst.daf.persistence.registries.SqlRegistry.conn |
Definition at line 313 of file registries.py.
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static |
Definition at line 302 of file registries.py.