Function act_describe

src/gpre/sql.cpp:2737–2772

//

static act* act_describe()
{
	bool in_sqlda;

	if (MSC_match(KW_INPUT))
		in_sqlda = true;
	else
	{
		MSC_match(KW_OUTPUT);
		in_sqlda = false;
	}

	dyn* statement = par_statement();

	if (!MSC_match(KW_INTO))
	{
		// check for SQL2 syntax
		// "USING SQL DESCRIPTOR sqlda"

		if (!MSC_match(KW_USING) || !MSC_match(KW_SQL) || !MSC_match(KW_DESCRIPTOR))
			CPR_s_error("INTO or USING SQL DESCRIPTOR sqlda");
	}
	else if (MSC_match(KW_SQL) && !MSC_match(KW_DESCRIPTOR))
		CPR_s_error("INTO SQL DESCRIPTOR sqlda");

	statement->dyn_sqlda = PAR_native_value(false, false);
	act* action = (act*) MSC_alloc(ACT_LEN);
	if (in_sqlda)
		action->act_type = ACT_dyn_describe_input;
	else
		action->act_type = ACT_dyn_describe;
	action->act_object = (ref*) statement;
	action->act_whenever = gen_whenever();

	return action;
}


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