Function PAR_validation_blr

src/jrd/par.cpp:219–249

PAR_blr equivalent for validation expressions. Validation expressions are boolean expressions, but may be prefixed with a blr_stmt_expr.

// PAR_blr equivalent for validation expressions.
// Validation expressions are boolean expressions, but may be prefixed with a blr_stmt_expr.
BoolExprNode* PAR_validation_blr(thread_db* tdbb, jrd_rel* relation, const UCHAR* blr, ULONG blr_length,
	CompilerScratch* view_csb, CompilerScratch** csb_ptr, USHORT flags)
{
	SET_TDBB(tdbb);

#ifdef CMP_DEBUG
	cmp_trace("BLR code given for JRD parsing:");
	// CVC: Couldn't find isc_trace_printer, so changed it to gds__trace_printer.
	fb_print_blr(blr, blr_length, gds__trace_printer, 0, 0);
#endif

	BlrParseWrapper csb(*tdbb->getDefaultPool(), relation, view_csb, csb_ptr, false, flags);

	csb->csb_blr_reader = BlrReader(blr, blr_length);

	getBlrVersion(csb);

	if (csb->csb_blr_reader.peekByte() == blr_stmt_expr)
	{
		// Parse it and ignore. This legacy and broken verb is transformed while parsing expressions.
		csb->csb_blr_reader.getByte();
		PAR_parse_stmt(tdbb, csb);
	}

	BoolExprNode* const expr = PAR_parse_boolean(tdbb, csb);

	if (csb->csb_blr_reader.getByte() != (UCHAR) blr_eoc)
		PAR_syntax_error(csb, "end_of_command");

	return expr;
}


// Parse a BLR datatype. Return the alignment requirements of the datatype.