static void deparseIndexElem()

in ext/pg_query/pg_query_deparse.c [1748:1822]
65 lines of code
19 McCabe index (conditional complexity)

static void deparseIndexElem(StringInfo str, IndexElem* index_elem)
{
	if (index_elem->name != NULL)
	{
		deparseColId(str, index_elem->name);
		appendStringInfoChar(str, ' ');
	}
	else if (index_elem->expr != NULL)
	{
		switch (nodeTag(index_elem->expr))
		{
			case T_FuncCall:
			case T_SQLValueFunction:
			case T_TypeCast:
			case T_CoalesceExpr:
			case T_MinMaxExpr:
			case T_XmlExpr:
			case T_XmlSerialize:
				deparseFuncExprWindowless(str, index_elem->expr);
				break;
			default:
				appendStringInfoChar(str, '(');
				deparseExpr(str, index_elem->expr);
				appendStringInfoString(str, ") ");
		}
	}
	else
	{
		Assert(false);
	}

	deparseOptCollate(str, index_elem->collation);

	if (list_length(index_elem->opclass) > 0)
	{
		deparseAnyName(str, index_elem->opclass);

		if (list_length(index_elem->opclassopts) > 0)
			deparseRelOptions(str, index_elem->opclassopts);

		appendStringInfoChar(str, ' ');
	}

	switch (index_elem->ordering)
	{
		case SORTBY_DEFAULT:
			// Default
			break;
		case SORTBY_ASC:
			appendStringInfoString(str, "ASC ");
			break;
		case SORTBY_DESC:
			appendStringInfoString(str, "DESC ");
			break;
		case SORTBY_USING:
			// Not allowed in CREATE INDEX
			Assert(false);
			break;
	}

	switch (index_elem->nulls_ordering)
	{
		case SORTBY_NULLS_DEFAULT:
			// Default
			break;
		case SORTBY_NULLS_FIRST:
			appendStringInfoString(str, "NULLS FIRST ");
			break;
		case SORTBY_NULLS_LAST:
			appendStringInfoString(str, "NULLS LAST ");
			break;
	}

	removeTrailingSpace(str);
}