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Overview of DuckDB Internals 9414
Tip For a detailed explanation of DuckDB internals, see the Design and Implementation of DuckDB Internals ("DiDi") library entry. On this page is a brief description of the internals of the DuckDB engine. Parser The parser converts a query ... string into the following tokens: SQLStatement QueryNode TableRef ParsedExpression The parser is not aware of the catalog or any other aspect of the database. It will no ... a query string into a set of tokens as specified. ParsedExpression The ParsedExpression represents an expression within a SQL statement. This can be e.g., a reference to a column, an addition operator or a constant value. The type of the ParsedExpression in ... e The QueryNode represents either (1) a SELECT statement, or (2) a set operation (i.e., UNION , INTERSECT or DIFFERENCE ). SQL Statement The SQLStatement represents a complete SQL statement. The type of the SQL Statement represents what kind of statement it ...
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