42 lines
1.4 KiB
Python
42 lines
1.4 KiB
Python
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from table import Table
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class SQL:
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def __init__(self, tables: dict, query: str) -> None:
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self.tables = tables
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self.query = query.replace(";", "")
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def __str__(self) -> str:
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pass
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# SELECIONAR * DE tabela
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def execute(self):
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query_parts = self.query.split(" ")
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if query_parts[0] == "SELECIONAR":
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self.select(query_parts)
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else:
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pass
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# SELECIONAR * DE tabela ONDE coluna = valor JUNTAR tabela2 coluna
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def select(self, query_parts: list) -> None:
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where_filter = None
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join_stmt = None
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if "ONDE" in query_parts:
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index = query_parts.index("ONDE")
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where_filter_column = query_parts[index + 1]
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where_filter_operator = query_parts[index + 2]
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where_filter_value = query_parts[index + 3]
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where_filter = [where_filter_column, where_filter_operator, where_filter_value]
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if "JUNTAR" in query_parts:
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index = query_parts.index("JUNTAR")
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join_table = query_parts[index + 1]
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join_column = query_parts[index + 2]
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join_stmt = [self.tables[join_table], join_column]
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table = self.tables[query_parts[3]]
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table.print_columns(table.columns,
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where_filter=where_filter,
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join_stmt=join_stmt)
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