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					@ -46,7 +46,7 @@ class projection(ast_node):
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					                    elif type(value) is str:
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					                    elif type(value) is str:
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					                        self.datasource = self.context.tables_byname[value]
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					                        self.datasource = self.context.tables_byname[value]
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					                if 'assumptions' in from_clause:
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					                if 'assumptions' in from_clause:
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					                    self.assumption = orderby(self, enlist(from_clause['assumptions']))
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					                    self.assumption = enlist(from_clause['assumptions'])
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					            elif type(from_clause) is str:
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					            elif type(from_clause) is str:
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					                self.datasource = self.context.tables_byname[from_clause]
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					                self.datasource = self.context.tables_byname[from_clause]
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