Function _ValidateDuplicateParameters

src/ast/ast_validations.c:2240–2262

Make sure no duplicated parameters are given in a statement expression

// Make sure no duplicated parameters are given in a statement expression
static AST_Validation _ValidateDuplicateParameters
(
	const cypher_astnode_t *statement  // statement
) {
	rax *param_names = raxNew();
	uint noptions = cypher_ast_statement_noptions(statement);
	for(uint i = 0; i < noptions; i++) {
		const cypher_astnode_t *option = cypher_ast_statement_get_option(statement, i);
		uint nparams = cypher_ast_cypher_option_nparams(option);
		for(uint j = 0; j < nparams; j++) {
			const cypher_astnode_t *param = cypher_ast_cypher_option_get_param(option, j);
			const char *paramName = cypher_ast_string_get_value(cypher_ast_cypher_option_param_get_name(param));
			// If parameter already exists return an error.
			if(!raxInsert(param_names, (unsigned char *) paramName, strlen(paramName), NULL, NULL)) {
				ErrorCtx_SetError("Duplicated parameter: %s", paramName);
				raxFree(param_names);
				return AST_INVALID;
			}
		}
	}
	raxFree(param_names);
	return AST_VALID;
}

// validate parameters of a query
AST_Validation AST_Validate_QueryParams