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https://github.com/ClickHouse/ClickHouse.git
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360 lines
13 KiB
Python
360 lines
13 KiB
Python
# -*- coding: utf-8 -*-
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import copy
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class Layout(object):
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LAYOUTS_STR_DICT = {
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'flat': '<flat/>',
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'hashed': '<hashed/>',
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'cache': '<cache><size_in_cells>128</size_in_cells></cache>',
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'complex_key_hashed': '<complex_key_hashed/>',
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'complex_key_hashed_one_key': '<complex_key_hashed/>',
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'complex_key_hashed_two_keys': '<complex_key_hashed/>',
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'complex_key_cache': '<complex_key_cache><size_in_cells>128</size_in_cells></complex_key_cache>',
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'range_hashed': '<range_hashed/>',
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}
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def __init__(self, name):
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self.name = name
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self.is_complex = False
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self.is_simple = False
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self.is_ranged = False
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if self.name.startswith('complex'):
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self.layout_type = 'complex'
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self.is_complex = True
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elif name.startswith('range'):
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self.layout_type = 'ranged'
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self.is_ranged = True
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else:
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self.layout_type = 'simple'
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self.is_simple = True
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def get_str(self):
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return self.LAYOUTS_STR_DICT[self.name]
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def get_key_block_name(self):
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if self.is_complex:
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return 'key'
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return 'id'
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class Row(object):
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def __init__(self, fields, values):
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self.data = {}
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for field, value in zip(fields, values):
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self.data[field.name] = value
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def has_field(self, name):
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return name in self.data
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def get_value_by_name(self, name):
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return self.data[name]
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def set_value(self, name, value):
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self.data[name] = value
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class Field(object):
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def __init__(self, name, field_type, is_key=False, is_range_key=False, default=None, hierarchical=False, range_hash_type=None, default_value_for_get=None):
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self.name = name
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self.field_type = field_type
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self.is_key = is_key
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self.default = default
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self.hierarchical = hierarchical
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self.range_hash_type = range_hash_type
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self.is_range = self.range_hash_type is not None
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self.is_range_key = is_range_key
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self.default_value_for_get = default_value_for_get
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def get_attribute_str(self):
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return '''
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<attribute>
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<name>{name}</name>
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<type>{field_type}</type>
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<null_value>{default}</null_value>
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<hierarchical>{hierarchical}</hierarchical>
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</attribute>'''.format(
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name=self.name,
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field_type=self.field_type,
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default=self.default if self.default else '',
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hierarchical='true' if self.hierarchical else 'false',
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)
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def get_simple_index_str(self):
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return '<name>{name}</name>'.format(name=self.name)
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def get_range_hash_str(self):
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if not self.range_hash_type:
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raise Exception("Field {} is not range hashed".format(self.name))
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return '''
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<range_{type}>
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<name>{name}</name>
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</range_{type}>
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'''.format(type=self.range_hash_type, name=self.name)
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class DictionaryStructure(object):
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def __init__(self, layout, fields):
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self.layout = layout
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self.keys = []
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self.range_key = None
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self.ordinary_fields = []
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self.range_fields = []
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self.has_hierarchy = False
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for field in fields:
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if field.is_key:
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self.keys.append(field)
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elif field.is_range:
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self.range_fields.append(field)
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else:
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self.ordinary_fields.append(field)
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if field.hierarchical:
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self.has_hierarchy = True
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if field.is_range_key:
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if self.range_key is not None:
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raise Exception("Duplicate range key {}".format(field.name))
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self.range_key = field
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if not self.layout.is_complex and len(self.keys) > 1:
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raise Exception("More than one key {} field in non complex layout {}".format(len(self.keys), self.layout.name))
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if self.layout.is_ranged and (not self.range_key or len(self.range_fields) != 2):
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raise Exception("Inconsistent configuration of ranged dictionary")
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def get_structure_str(self):
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fields_strs = []
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for field in self.ordinary_fields:
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fields_strs.append(field.get_attribute_str())
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key_strs = []
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if self.layout.is_complex:
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for key_field in self.keys:
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key_strs.append(key_field.get_attribute_str())
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else: # same for simple and ranged
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for key_field in self.keys:
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key_strs.append(key_field.get_simple_index_str())
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ranged_strs = []
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if self.layout.is_ranged:
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for range_field in self.range_fields:
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ranged_strs.append(range_field.get_range_hash_str())
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return '''
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<layout>
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{layout_str}
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</layout>
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<structure>
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<{key_block_name}>
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{key_str}
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</{key_block_name}>
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{range_strs}
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{attributes_str}
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</structure>'''.format(
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layout_str=self.layout.get_str(),
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key_block_name=self.layout.get_key_block_name(),
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key_str='\n'.join(key_strs),
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attributes_str='\n'.join(fields_strs),
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range_strs='\n'.join(ranged_strs),
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)
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def get_ordered_names(self):
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fields_strs = []
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for key_field in self.keys:
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fields_strs.append(key_field.name)
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for range_field in self.range_fields:
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fields_strs.append(range_field.name)
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for field in self.ordinary_fields:
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fields_strs.append(field.name)
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return fields_strs
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def get_all_fields(self):
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return self.keys + self.range_fields + self.ordinary_fields
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def _get_dict_get_common_expression(self, dict_name, field, row, or_default, with_type, has):
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if field in self.keys:
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raise Exception("Trying to receive key field {} from dictionary".format(field.name))
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if not self.layout.is_complex:
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if not or_default:
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key_expr = ', toUInt64({})'.format(row.data[self.keys[0].name])
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else:
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key_expr = ', toUInt64({})'.format(self.keys[0].default_value_for_get)
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else:
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key_exprs_strs = []
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for key in self.keys:
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if not or_default:
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val = row.data[key.name]
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else:
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val = key.default_value_for_get
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if isinstance(val, str):
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val = "'" + val + "'"
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key_exprs_strs.append('to{type}({value})'.format(type=key.field_type, value=val))
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key_expr = ', tuple(' + ','.join(key_exprs_strs) + ')'
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date_expr = ''
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if self.layout.is_ranged:
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val = row.data[self.range_key.name]
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if isinstance(val, str):
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val = "'" + val + "'"
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val = "to{type}({val})".format(type=self.range_key.field_type, val=val)
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date_expr = ', ' + val
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if or_default:
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raise Exception("Can create 'dictGetOrDefault' query for ranged dictionary")
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if or_default:
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or_default_expr = 'OrDefault'
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if field.default_value_for_get is None:
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raise Exception("Can create 'dictGetOrDefault' query for field {} without default_value_for_get".format(field.name))
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val = field.default_value_for_get
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if isinstance(val, str):
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val = "'" + val + "'"
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default_value_for_get = ', to{type}({value})'.format(type=field.field_type, value=val)
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else:
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or_default_expr = ''
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default_value_for_get = ''
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if with_type:
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field_type = field.field_type
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else:
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field_type = ''
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field_name = ", '" + field.name + "'"
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if has:
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what = "Has"
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field_type = ''
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or_default = ''
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field_name = ''
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date_expr = ''
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def_for_get = ''
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else:
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what = "Get"
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return "dict{what}{field_type}{or_default}('{dict_name}'{field_name}{key_expr}{date_expr}{def_for_get})".format(
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what=what,
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field_type=field_type,
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dict_name=dict_name,
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field_name=field_name,
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key_expr=key_expr,
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date_expr=date_expr,
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or_default=or_default_expr,
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def_for_get=default_value_for_get,
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)
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def get_get_expressions(self, dict_name, field, row):
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return [
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self._get_dict_get_common_expression(dict_name, field, row, or_default=False, with_type=False, has=False),
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self._get_dict_get_common_expression(dict_name, field, row, or_default=False, with_type=True, has=False),
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]
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def get_get_or_default_expressions(self, dict_name, field, row):
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if not self.layout.is_ranged:
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return [
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self._get_dict_get_common_expression(dict_name, field, row, or_default=True, with_type=False, has=False),
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self._get_dict_get_common_expression(dict_name, field, row, or_default=True, with_type=True, has=False),
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]
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return []
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def get_has_expressions(self, dict_name, field, row):
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if not self.layout.is_ranged:
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return [self._get_dict_get_common_expression(dict_name, field, row, or_default=False, with_type=False, has=True)]
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return []
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def get_hierarchical_expressions(self, dict_name, row):
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if self.layout.is_simple:
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key_expr = 'toUInt64({})'.format(row.data[self.keys[0].name])
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return [
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"dictGetHierarchy('{dict_name}', {key})".format(
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dict_name=dict_name,
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key=key_expr,
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),
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]
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return []
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def get_is_in_expressions(self, dict_name, row, parent_row):
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if self.layout.is_simple:
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child_key_expr = 'toUInt64({})'.format(row.data[self.keys[0].name])
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parent_key_expr = 'toUInt64({})'.format(parent_row.data[self.keys[0].name])
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return [
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"dictIsIn('{dict_name}', {child_key}, {parent_key})".format(
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dict_name=dict_name,
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child_key=child_key_expr,
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parent_key=parent_key_expr,)
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]
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return []
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class Dictionary(object):
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def __init__(self, name, structure, source, config_path,
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table_name, fields, min_lifetime=3, max_lifetime=5):
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self.name = name
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self.structure = copy.deepcopy(structure)
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self.source = copy.deepcopy(source)
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self.config_path = config_path
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self.table_name = table_name
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self.fields = fields
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self.min_lifetime = min_lifetime
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self.max_lifetime = max_lifetime
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def generate_config(self):
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with open(self.config_path, 'w') as result:
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result.write('''
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<yandex>
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<dictionary>
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<lifetime>
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<min>{min_lifetime}</min>
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<max>{max_lifetime}</max>
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</lifetime>
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<name>{name}</name>
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{structure}
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<source>
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{source}
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</source>
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</dictionary>
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</yandex>
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'''.format(
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min_lifetime=self.min_lifetime,
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max_lifetime=self.max_lifetime,
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name=self.name,
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structure=self.structure.get_structure_str(),
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source=self.source.get_source_str(self.table_name),
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))
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def prepare_source(self, cluster):
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self.source.prepare(self.structure, self.table_name, cluster)
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def load_data(self, data):
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if not self.source.prepared:
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raise Exception("Cannot load data for dictionary {}, source is not prepared".format(self.name))
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self.source.load_data(data, self.table_name)
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def get_select_get_queries(self, field, row):
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return ['select {}'.format(expr) for expr in self.structure.get_get_expressions(self.name, field, row)]
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def get_select_get_or_default_queries(self, field, row):
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return ['select {}'.format(expr) for expr in self.structure.get_get_or_default_expressions(self.name, field, row)]
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def get_select_has_queries(self, field, row):
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return ['select {}'.format(expr) for expr in self.structure.get_has_expressions(self.name, field, row)]
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def get_hierarchical_queries(self, row):
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return ['select {}'.format(expr) for expr in self.structure.get_hierarchical_expressions(self.name, row)]
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def get_is_in_queries(self, row, parent_row):
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return ['select {}'.format(expr) for expr in self.structure.get_is_in_expressions(self.name, row, parent_row)]
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def is_complex(self):
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return self.structure.layout.is_complex
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def get_fields(self):
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return self.fields
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