Function addRangeTableEntryForValues

src/backend/parser/parse_relation.c:2277–2356

* Add an entry for a VALUES list to the pstate's range table (p_rtable). * Then, construct and return a ParseNamespaceItem for the new RTE. * * This is much like addRangeTableEntry() except that it makes a values RTE. */

 * This is much like addRangeTableEntry() except that it makes a values RTE.
 */
ParseNamespaceItem *
addRangeTableEntryForValues(ParseState *pstate,
							List *exprs,
							List *coltypes,
							List *coltypmods,
							List *colcollations,
							Alias *alias,
							bool lateral,
							bool inFromCl)
{
	RangeTblEntry *rte = makeNode(RangeTblEntry);
	char	   *refname = alias ? alias->aliasname : pstrdup("*VALUES*");
	Alias	   *eref;
	int			numaliases;
	int			numcolumns;

	Assert(pstate != NULL);

	rte->rtekind = RTE_VALUES;
	rte->relid = InvalidOid;
	rte->subquery = NULL;
	rte->values_lists = exprs;
	rte->coltypes = coltypes;
	rte->coltypmods = coltypmods;
	rte->colcollations = colcollations;
	rte->alias = alias;

	eref = alias ? copyObject(alias) : makeAlias(refname, NIL);

	/* fill in any unspecified alias columns */
	numcolumns = list_length((List *) linitial(exprs));
	numaliases = list_length(eref->colnames);
	while (numaliases < numcolumns)
	{
		char		attrname[64];

		numaliases++;
		snprintf(attrname, sizeof(attrname), "column%d", numaliases);
		eref->colnames = lappend(eref->colnames,
								 makeString(pstrdup(attrname)));
	}
	if (numcolumns < numaliases)
		ereport(ERROR,
				(errcode(ERRCODE_INVALID_COLUMN_REFERENCE),
				 errmsg("VALUES lists \"%s\" have %d columns available but %d columns specified",
						refname, numcolumns, numaliases)));

	rte->eref = eref;

	/*
	 * Set flags and access permissions.
	 *
	 * Subqueries are never checked for access rights.
	 */
	rte->lateral = lateral;
	rte->inh = false;			/* never true for values RTEs */
	rte->inFromCl = inFromCl;