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−"""Common subpackage of cubicweb : defines library functions used both on the
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−hg stserver side and on the client side
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−
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−:organization: Logilab
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−:copyright: 2001-2008 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
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−:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
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−"""
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−
+
−from logilab.common.adbh import FunctionDescr
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−
+
−from cubicweb._exceptions import * # bw compat
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−
+
−from rql.utils import register_function, iter_funcnode_variables
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−
+
−class COMMA_JOIN(FunctionDescr):
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−    supported_backends = ('postgres', 'sqlite',)
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−    rtype = 'String'
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−    
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−    @classmethod
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−    def st_description(cls, funcnode):
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−        return ', '.join(term.get_description()
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−                         for term in iter_funcnode_variables(funcnode))
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−    
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−register_function(COMMA_JOIN)  # XXX do not expose?
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−
+
−
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−class CONCAT_STRINGS(COMMA_JOIN):
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−    aggregat = True
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−    
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−register_function(CONCAT_STRINGS) # XXX bw compat
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−
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−class GROUP_CONCAT(CONCAT_STRINGS):
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−    supported_backends = ('mysql', 'postgres', 'sqlite',)
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−    
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−register_function(GROUP_CONCAT)
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−
+
−
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−class LIMIT_SIZE(FunctionDescr):
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−    supported_backends = ('postgres', 'sqlite',)
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−    rtype = 'String'
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−    
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−    @classmethod
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−    def st_description(cls, funcnode):
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−        return funcnode.children[0].get_description()
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−    
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−register_function(LIMIT_SIZE)
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−
+
−
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−class TEXT_LIMIT_SIZE(LIMIT_SIZE):
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−    supported_backends = ('mysql', 'postgres', 'sqlite',)
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−    
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−register_function(TEXT_LIMIT_SIZE)