static void deparseRuleStmt()

in ext/pg_query/pg_query_deparse.c [7855:7920]
56 lines of code
14 McCabe index (conditional complexity)

static void deparseRuleStmt(StringInfo str, RuleStmt* rule_stmt)
{
	ListCell *lc;

	appendStringInfoString(str, "CREATE ");

	if (rule_stmt->replace)
		appendStringInfoString(str, "OR REPLACE ");

	appendStringInfoString(str, "RULE ");
	appendStringInfoString(str, quote_identifier(rule_stmt->rulename));
	appendStringInfoString(str, " AS ON ");

	switch (rule_stmt->event)
	{
		case CMD_UNKNOWN:
		case CMD_UTILITY:
		case CMD_NOTHING:
			// Not supported here
			Assert(false);
			break;
		case CMD_SELECT:
			appendStringInfoString(str, "SELECT ");
			break;
		case CMD_UPDATE:
			appendStringInfoString(str, "UPDATE ");
			break;
		case CMD_INSERT:
			appendStringInfoString(str, "INSERT ");
			break;
		case CMD_DELETE:
			appendStringInfoString(str, "DELETE ");
			break;
	}

	appendStringInfoString(str, "TO ");
	deparseRangeVar(str, rule_stmt->relation, DEPARSE_NODE_CONTEXT_NONE);
	appendStringInfoChar(str, ' ');

	deparseWhereClause(str, rule_stmt->whereClause);

	appendStringInfoString(str, "DO ");

	if (rule_stmt->instead)
		appendStringInfoString(str, "INSTEAD ");

	if (list_length(rule_stmt->actions) == 0)
	{
		appendStringInfoString(str, "NOTHING");
	}
	else if (list_length(rule_stmt->actions) == 1)
	{
		deparseRuleActionStmt(str, linitial(rule_stmt->actions));
	}
	else
	{
		appendStringInfoChar(str, '(');
		foreach (lc, rule_stmt->actions)
		{
			deparseRuleActionStmt(str, lfirst(lc));
			if (lnext(rule_stmt->actions, lc))
				appendStringInfoString(str, "; ");
		}
		appendStringInfoChar(str, ')');
	}
}