Function par_field

src/gpre/sql.cpp:5807–5904

//

static gpre_fld* par_field( gpre_req* request, gpre_rel* relation)
{
	gpre_fld* field = make_field(relation);

	SQL_par_field_dtype(request, field, false);

	if (MSC_match(KW_COMPUTED))
	{
		if (field->fld_global)
			PAR_error("Cannot use domains to override computed column size");
		if (field->fld_array_info)
			PAR_error("Computed columns cannot be arrays");

		par_computed(request, field);
	}

	// Check if default value was specified

	if (gpreGlob.token_global.tok_keyword == KW_DEFAULT)
	{
		field->fld_default_source = CPR_start_text();
		PAR_get_token();

		if (MSC_match(KW_USER))
			field->fld_default_value = MSC_node(nod_user_name, 0);
		// Begin sql/date/time/timestamp
		else if (MSC_match(KW_CURRENT_DATE))
			field->fld_default_value = MSC_node(nod_current_date, 0);
		else if (MSC_match(KW_CURRENT_TIME))
			field->fld_default_value = MSC_node(nod_current_time, 0);
		else if (MSC_match(KW_CURRENT_TIMESTAMP))
			field->fld_default_value = MSC_node(nod_current_timestamp, 0);
		// End sql/date/time/timestamp
		else if (MSC_match(KW_NULL))
			field->fld_default_value = MSC_node(nod_null, 0);
		else
		{
			if (MSC_match(KW_MINUS))
			{
				if (gpreGlob.token_global.tok_type != tok_number)
					CPR_s_error("<number>");

				gpre_nod* literal_node = EXP_literal();
				field->fld_default_value = MSC_unary(nod_negate, literal_node);
			}
			else if ((field->fld_default_value = EXP_literal()) == NULL)
				CPR_s_error("<constant>");
		}
		CPR_end_text(field->fld_default_source);
	}


	// Check for any column level constraints

	cnstrt** constraint_ref = &field->fld_constraints;
	bool in_constraints = true;

	while (in_constraints)