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41 lines
1.4 KiB
41 lines
1.4 KiB
from engine.ast import ColRef, TableInfo, View, ast_node, Context
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from engine.utils import base62uuid, seps
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from engine.expr import expr
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class order_item:
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def __init__(self, name, node, order = True):
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self.name = name
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self.order = order
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self.node = node
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self.materialized = False
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def materialize(self):
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if not self.materialized:
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self.name = expr(self.node, self.name, False).cexpr
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self.materialized = True
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return ('' if self.order else '-') + f'({self.name})'
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def __str__(self):
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return self.name
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def __repr__(self):
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return self.__str__()
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class orderby(ast_node):
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name = '_orderby'
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def __init__(self, parent: "ast_node", node, context: Context = None):
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self.col_list = []
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super().__init__(parent, node, context)
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def init(self, _):
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self.datasource = self.parent.datasource
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self.order = []
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self.view = ''
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def produce(self, node):
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if type(node) is not list:
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node = [node]
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for n in node:
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order = not ('sort' in n and n['sort'] == 'desc')
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col_id = self.datasource.columns_byname[n['value']].id
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self.col_list.append(col_id if order else -col_id-1)
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self.order.append(order_item(n['value'], self, order))
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def finialize(self, references):
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self.order = [ o for o in self.order if o.name in references ] |