Function parseQuery

src/bin/pgbench/pgbench.c:4668–4715

* Replace :param with $n throughout the command's SQL text, which * is a modifiable string in cmd->lines. */

 * is a modifiable string in cmd->lines.
 */
static bool
parseQuery(Command *cmd)
{
	char	   *sql,
			   *p;

	cmd->argc = 1;

	p = sql = pg_strdup(cmd->lines.data);
	while ((p = strchr(p, ':')) != NULL)
	{
		char		var[13];
		char	   *name;
		int			eaten;

		name = parseVariable(p, &eaten);
		if (name == NULL)
		{
			while (*p == ':')
			{
				p++;
			}
			continue;
		}

		/*
		 * cmd->argv[0] is the SQL statement itself, so the max number of
		 * arguments is one less than MAX_ARGS
		 */
		if (cmd->argc >= MAX_ARGS)
		{
			pg_log_error("statement has too many arguments (maximum is %d): %s",
						 MAX_ARGS - 1, cmd->lines.data);
			pg_free(name);
			return false;
		}

		sprintf(var, "$%d", cmd->argc);
		p = replaceVariable(&sql, p, eaten, var);

		cmd->argv[cmd->argc] = name;
		cmd->argc++;
	}

	Assert(cmd->argv[0] == NULL);
	cmd->argv[0] = sql;
	return true;
}

/*
 * syntax error while parsing a script (in practice, while parsing a