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228 lines
7.6 KiB
228 lines
7.6 KiB
from engine.types import *
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from engine.utils import CaseInsensitiveDict, base62uuid, enlist
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from typing import List, Dict, Set
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class ColRef:
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def __init__(self, _ty, cobj, table:'TableInfo', name, id, compound = False, _ty_args = None):
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self.type : Types = AnyT
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if type(_ty) is str:
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self.type = builtin_types[_ty.lower()]
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if _ty_args:
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self.type = self.type(enlist(_ty_args))
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elif type(_ty) is Types:
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self.type = _ty
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self.cobj = cobj
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self.table = table
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self.name = name
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self.alias = set()
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self.id = id # position in table
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self.compound = compound # compound field (list as a field)
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# e.g. order by, group by, filter by expressions
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self.__arr__ = (_ty, cobj, table, name, id)
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def get_full_name(self):
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table_name = self.table.table_name
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it_alias = iter(self.table.alias)
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alias = next(it_alias, table_name)
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try:
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while alias == table_name:
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alias = next(it_alias)
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except StopIteration:
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alias = table_name
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return f'{alias}.{self.name}'
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def __getitem__(self, key):
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if type(key) is str:
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return getattr(self, key)
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else:
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return self.__arr__[key]
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def __setitem__(self, key, value):
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self.__arr__[key] = value
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class TableInfo:
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def __init__(self, table_name, cols, cxt:'Context'):
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# statics
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self.table_name : str = table_name
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self.contextname_cpp : str = ''
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self.alias : Set[str] = set([table_name])
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self.columns_byname : Dict[str, ColRef] = CaseInsensitiveDict() # column_name, type
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self.columns : List[ColRef] = []
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self.cxt = cxt
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# keep track of temp vars
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self.rec = None
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self.add_cols(cols)
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# runtime
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self.order = [] # assumptions
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cxt.tables_byname[self.table_name] = self # construct reverse map
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def add_cols(self, cols, new = True):
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for c in cols:
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self.add_col(c, new)
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def add_col(self, c, new = True):
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_ty = c['type']
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_ty_args = None
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if type(_ty) is dict:
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_ty_val = list(_ty.keys())[0]
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_ty_args = _ty[_ty_val]
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_ty = _ty_val
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if new:
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col_object = ColRef(_ty, c, self, c['name'], len(self.columns), _ty_args = _ty_args)
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else:
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col_object = c
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c.table = self
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self.columns_byname[c['name']] = col_object
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self.columns.append(col_object)
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def add_alias(self, alias):
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if alias in self.cxt.tables_byname.keys():
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print("Error: table alias already exists")
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return
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self.cxt.tables_byname[alias] = self
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self.alias.add(alias)
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def parse_col_names(self, colExpr) -> ColRef:
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parsedColExpr = colExpr.split('.')
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if len(parsedColExpr) <= 1:
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col = self.columns_byname[colExpr]
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if type(self.rec) is set:
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self.rec.add(col)
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return col
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else:
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datasource = self.cxt.tables_byname[parsedColExpr[0]]
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if datasource is None:
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raise ValueError(f'Table name/alias not defined{parsedColExpr[0]}')
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else:
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return datasource.parse_col_names(parsedColExpr[1])
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def all_cols(self):
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if type(self.rec) is set:
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self.rec.update(self.columns)
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return set(self.columns)
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class Context:
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def new(self):
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self.headers = set(['\"./server/libaquery.h\"',
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'\"./server/monetdb_conn.h\"'])
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self.ccode = ''
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self.sql = ''
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self.finalized = False
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self.udf = None
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self.scans = []
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self.procs = []
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self.queries = []
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self.module_init_loc = 0
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self.special_gb = False
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def __init__(self):
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self.tables_byname = dict()
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self.col_byname = dict()
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self.tables = []
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self.cols = []
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self.datasource = None
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self.module_stubs = ''
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self.module_map = {}
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self.udf_map = dict()
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self.udf_agg_map = dict()
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self.use_columnstore = False
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self.print = print
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self.has_dll = False
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self.dialect = 'MonetDB'
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self.is_msvc = False
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self.have_hge = False
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self.Error = lambda *args: print(*args)
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self.Info = lambda *_: None
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def get_scan_var(self):
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it_var = 'i' + base62uuid(2)
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scan_vars = set(s.it_var for s in self.scans)
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while(it_var in scan_vars):
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it_var = 'i' + base62uuid(6)
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return it_var
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def emit(self, sql:str):
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self.sql += sql + ' '
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def emitc(self, c:str):
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self.ccode += c + '\n'
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def add_table(self, table_name, cols):
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tbl = TableInfo(table_name, cols, self)
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self.tables.append(tbl)
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return tbl
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def remove_scan(self, scan, str_scan):
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self.emitc(str_scan)
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self.scans.remove(scan)
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function_deco = '__AQEXPORT__(int) '
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function_head = ('(Context* cxt) {\n' +
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'\tusing namespace std;\n' +
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'\tusing namespace types;\n' +
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'\tauto server = static_cast<Server*>(cxt->alt_server);\n')
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udf_head = ('#pragma once\n'
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'#include \"./server/libaquery.h\"\n'
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'#include \"./server/aggregations.h\"\n\n'
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)
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def get_init_func(self):
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if not self.module_map:
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return ''
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ret = '__AQEXPORT__(void) __builtin_init_user_module(Context* cxt){\n'
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for fname in self.module_map.keys():
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ret += f'{fname} = (decltype({fname}))(cxt->get_module_function("{fname}"));\n'
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self.queries.insert(self.module_init_loc, 'P__builtin_init_user_module')
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return ret + '}\n'
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def sql_begin(self):
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self.sql = ''
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def sql_end(self):
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# eliminate empty queries
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s = self.sql.strip()
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while(s and s[-1] == ';'):
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s = s[:-1].strip()
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if s and s.lower() != 'select':
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self.queries.append('Q' + self.sql)
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self.sql = ''
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def postproc_begin(self, proc_name: str):
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self.ccode = self.function_deco + proc_name + self.function_head
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def postproc_end(self, proc_name: str):
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self.procs.append(self.ccode + 'return 0;\n}')
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self.ccode = ''
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self.queries.append('P' + proc_name)
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def finalize_udf(self):
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if self.udf is not None:
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return (Context.udf_head
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+ self.module_stubs
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+ self.get_init_func()
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+ self.udf
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)
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else:
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return None
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def finalize(self):
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from aquery_config import build_driver, os_platform
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if not self.finalized:
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headers = ''
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if build_driver == 'MSBuild':
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headers ='#include \"./server/pch.hpp\"\n'
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for h in self.headers:
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if h[0] != '"':
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headers += '#include <' + h + '>\n'
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else:
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headers += '#include ' + h + '\n'
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if os_platform == 'win':
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headers += '#undef max\n'
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headers += '#undef min\n'
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self.ccode = headers + '\n'.join(self.procs)
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self.headers = set()
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return self.ccode
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