Function resolve

src/gpre/sqe.cpp:3678–3807

//

static gpre_fld* resolve(gpre_nod* node,
						 gpre_ctx* context, gpre_ctx** found_context, act** slice_action)
{
	gpre_fld* field;

	assert_IS_NOD(node);

	gpre_rse* rs_stream = context->ctx_stream;
	if (rs_stream)
	{
		for (SSHORT i = 0; i < rs_stream->rse_count; i++)
		{
			if ((field = resolve(node, rs_stream->rse_context[i], found_context, slice_action)))
			{
				return field;
			}
		}

		return NULL;
	}

	tok* f_token = (tok*) node->nod_arg[0];
	tok* q_token = (tok*) node->nod_arg[1];

	if (!(context->ctx_relation || context->ctx_procedure))
		return NULL;

	// Handle unqualified fields first for simplicity

	if (!q_token)
		field = MET_context_field(context, f_token->tok_string);
	else
	{
		// Now search alternatives for the qualifier

		gpre_sym* symbol = HSH_lookup(q_token->tok_string);

		// This caused gpre to dump core if there are lower case
		// table aliases in a where clause used with dialect 2 or 3

		//if ( (symbol == NULL) && (sw_case || gpreGlob.sw_sql_dialect == SQL_DIALECT_V5))
		//	symbol = HSH_lookup2 (q_token->tok_string);


		// So I replaced it with the following, don't know
		// why we don't do a HSH_lookup2 in any case, but so it may be.
		// FSG 16.Nov.2000

		if (symbol == NULL)
			symbol = HSH_lookup2(q_token->tok_string);


		for (gpre_sym* temp_symbol = symbol; temp_symbol; temp_symbol = temp_symbol->sym_homonym)
		{
			if (temp_symbol->sym_type == SYM_context)
			{
				symbol = temp_symbol;
				break;