Function validateInfiniteBounds

src/backend/parser/parse_utilcmd.c:5487–5521

* validateInfiniteBounds * * Check that a MAXVALUE or MINVALUE specification in a partition bound is * followed only by more of the same. */

 * followed only by more of the same.
 */
static void
validateInfiniteBounds(ParseState *pstate, List *blist)
{
	ListCell   *lc;
	PartitionRangeDatumKind kind = PARTITION_RANGE_DATUM_VALUE;

	foreach(lc, blist)
	{
		PartitionRangeDatum *prd = castNode(PartitionRangeDatum, lfirst(lc));

		if (kind == prd->kind)
			continue;

		switch (kind)
		{
			case PARTITION_RANGE_DATUM_VALUE:
				kind = prd->kind;
				break;

			case PARTITION_RANGE_DATUM_MAXVALUE:
				ereport(ERROR,
						(errcode(ERRCODE_DATATYPE_MISMATCH),
						 errmsg("every bound following MAXVALUE must also be MAXVALUE"),
						 parser_errposition(pstate, exprLocation((Node *) prd))));
				break;

			case PARTITION_RANGE_DATUM_MINVALUE:
				ereport(ERROR,
						(errcode(ERRCODE_DATATYPE_MISMATCH),
						 errmsg("every bound following MINVALUE must also be MINVALUE"),
						 parser_errposition(pstate, exprLocation((Node *) prd))));
				break;
		}
	}
}

/*
 * Transform one entry in a partition bound spec, producing a constant.