Function _ValidateQuerySequence

src/ast/ast_validations.c:1899–1924

Perform validations not constrained to a specific scope

// Perform validations not constrained to a specific scope
static AST_Validation _ValidateQuerySequence
(
	const AST *ast
) {
	// Validate the final clause
	if(_ValidateQueryTermination(ast) != AST_VALID) {
		return AST_INVALID;
	}

	// The query cannot begin with a "WITH *" projection.
	const cypher_astnode_t *start_clause = cypher_ast_query_get_clause(ast->root, 0);
	if(cypher_astnode_type(start_clause) == CYPHER_AST_WITH &&
	   cypher_ast_with_has_include_existing(start_clause)) {
		ErrorCtx_SetError("Query cannot begin with 'WITH *'.");
		return AST_INVALID;
	}

	// The query cannot begin with a "RETURN *" projection.
	if(cypher_astnode_type(start_clause) == CYPHER_AST_RETURN &&
	   cypher_ast_return_has_include_existing(start_clause)) {
		ErrorCtx_SetError("Query cannot begin with 'RETURN *'.");
		return AST_INVALID;
	}

	return AST_VALID;
}

/* In any given query scope, reading clauses (MATCH, UNWIND, and InQueryCall)
 * cannot follow updating clauses (CREATE, MERGE, DELETE, SET, REMOVE, FOREACH).