Package gavo :: Package svcs :: Module pql :: Class PQLTextParIR

Class PQLTextParIR

object --+    
         |    
    PQLPar --+
             |
            PQLTextParIR

a PQL string parameter matching "google-like", "Information Retrieval".

Basically, this matches the input and the database column as document vectors. Correspondingly, ranges are disallowed.

Nested Classes
	rangeClass a stand-in for PQLRange when no ranges are to be supported
Inherited from `PQLPar`: `valParser`

Instance Methods

getSQL(self, colName, sqlPars)
returns an SQL condition expressing this PQL constraint for colName.

source code

covers(self, value)
returns true if value is within the ranges specified by the PQL expression.

source code

Inherited from PQLPar: __eq__, __init__, __repr__, __str__, getValuesAsSet

Inherited from object: __delattr__, __format__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __setattr__, __sizeof__, __subclasshook__

Class Methods
Inherited from `PQLPar`: `fromLiteral`

Static Methods
Inherited from `PQLPar`: `stepParser`

Class Variables
	nullvalue = `''` hash(x)

Properties
Inherited from `object`: `__class__`

Method Details

getSQL(self, colName, sqlPars)

source code

returns an SQL condition expressing this PQL constraint for colName.

The parameters necessary are added to sqlPars.

cmpExpr can be used to override the cmpExpr argument to PQLRange.getSQL; this is not really intended for user code, though, but rather for subclasses of PQLPar

Overrides: PQLPar.getSQL: (inherited documentation)

covers(self, value)

source code

returns true if value is within the ranges specified by the PQL expression.

value must be type-true, i.e., you are responsible for converting it into the type the range are in.

Overrides: PQLPar.covers: (inherited documentation)