Function plpgsql_parse_word

src/pl/plpgsql/src/pl_comp.c:1414–1461

---------- * plpgsql_parse_word The scanner calls this to postparse * any single word that is not a reserved keyword. * * word1 is the downcased/dequoted identifier; it must be palloc'd in the * function's long-term memory context. * * yytxt is the original token text; we need this to check for quoting, * so that later checks for unreserved keywords work properly. * * We attempt to r

 * ----------
 */
bool
plpgsql_parse_word(char *word1, const char *yytxt, bool lookup,
				   PLwdatum *wdatum, PLword *word)
{
	PLpgSQL_nsitem *ns;

	/*
	 * We should not lookup variables in DECLARE sections.  In SQL
	 * expressions, there's no need to do so either --- lookup will happen
	 * when the expression is compiled.
	 */
	if (lookup && plpgsql_IdentifierLookup == IDENTIFIER_LOOKUP_NORMAL)
	{
		/*
		 * Do a lookup in the current namespace stack
		 */
		ns = plpgsql_ns_lookup(plpgsql_ns_top(), false,
							   word1, NULL, NULL,
							   NULL);

		if (ns != NULL)
		{
			switch (ns->itemtype)
			{
				case PLPGSQL_NSTYPE_VAR:
				case PLPGSQL_NSTYPE_REC:
					wdatum->datum = plpgsql_Datums[ns->itemno];
					wdatum->ident = word1;
					wdatum->quoted = (yytxt[0] == '"');
					wdatum->idents = NIL;
					return true;

				default:
					/* plpgsql_ns_lookup should never return anything else */
					elog(ERROR, "unrecognized plpgsql itemtype: %d",
						 ns->itemtype);
			}
		}
	}

	/*
	 * Nothing found - up to now it's a word without any special meaning for
	 * us.
	 */
	word->ident = word1;
	word->quoted = (yytxt[0] == '"');
	return false;
}


/* ----------