The SQLParser was implemented in C++ as a standalone component responsible for interpreting SQL queries and converting them into a structured internal representation suitable for downstream processing. At its core, the system used a YACC‑generated grammar to define the syntactic rules of the SQL dialects we needed to support. This grammar, expressed in a BNF‑like notation, captured the structure of statements such as `SELECT`, `INSERT`, `UPDATE`, `DELETE`, joins, expressions, and nested subqueries. A custom lexical analyzer complemented the grammar by tokenizing the raw SQL input stream into keywords, identifiers, operators, literals, and punctuation symbols. Once tokenized and parsed, the system constructed an abstract syntax tree (AST) that represented the logical hierarchy of each SQL statement. This AST served as the canonical form for further analysis, validation, and transformation. As the application requirements evolved, the parser was extended to handle additional SQL constructs, vendor‑specific extensions, and more complex expression patterns, ensuring compatibility with the query shapes produced by the rest of the system. To integrate with the broader application stack, the parser was packaged as a COM/ActiveX component, exposing automation‑friendly interfaces that allowed Visual Basic and other COM‑aware environments to instantiate and interact with it. This approach provided a clean separation between the high‑performance C++ parsing engine and the higher‑level business logic, while maintaining a stable contract for query inspection and manipulation.