[SQL] problem while converting sybase quries to postgres

[imam]

The following is a sybase query and i am trying to convet it into postgres but in postgres the join will be specified in from clause and we cannot specify any logical operator   i would be grateful if you could tell me the solution for it SELECT t1.SR_TRAN_HEAD_PK AS ReceiptHeaderPK, t1.ADJ_TRAN_ID AS AdjustmentTransactionID, t1.TOTAL_QTY_INVOICED AS TotalQtyInvoiced, t1.TOTAL_QTY_MATCHED AS TotalQtyMatched, t1.VENDOR_ID AS VendorID, t1.COMMENTS AS Comments, t1.SR_NUMBER AS ShipmentReceiptNumber, t1.SHIPMENT_RECEIPT_DATE AS ReceiptDate, t1.POSTING_DATE AS PostingDate, t2.PO_HEADER_PK AS POHeaderPK, t1.VENDOR_DOCUMENT_NUMBER AS VendorDocumentNumber, t1.TRAN_STATUS_ID AS TransactionStatusID, t1.SR_TOTAL AS ReceiptTotal, t1.SR_BATCH_NUMBER AS ReceiptBatchNumber, t1.VENDOR_PK AS VendorPK, t1.TOTAL_QTY_RECEIVED AS TotalQtyReceived, t1.TOTAL_QTY_REJECTED AS TotalQtyRejected, t2.PO_NUMBER AS PONumber, t2.BUYER_PK AS BuyerPK, t2.BILLING_TERMS_PK AS BillingTermsPK, t2.PO_GROUP_PK AS POGroupPK, t2.PURCHASE_ORDER_TYPE_PK AS POTypePK, t2.PO_DELIVERY_METHOD_PK AS PODeliveryMethodPK, t2.CUSTOMER_PK AS CustomerPK, t2.PO_HEADER_STATUS_PK AS POHeaderStatusPK, t2.BUYER_ID AS BuyerID, t2.PO_GROUP AS POGroup, t2.PO_TYPE AS POType, t2.PO_DATE AS PODate, t2.PO_HEADER_STATUS AS POStatus, t2.IS_PO_ON_HOLD AS POonHold, t2.TRADE_DISCOUNT AS TradeDiscount, t2.SHIPPING_CHARGES AS ShippingCharges, t2.OTHER_CHARGES AS OtherCharges, t2.PO_TAX AS POTax, t2.PO_SUB_TOTAL AS POSubTotal, t2.PO_DISCOUNT AS PODiscount, t2.PO_TOTAL AS POTotal, t2.PO_TOTAL_QTY AS TotalQty, t2.RELEASED_DATE AS ReleasedDate, t3.AMT_APPORTIONED AS AmtApportioned, t3.MODIFIED_RECEIVED_QTY AS ModifiedReceivedQty, t3.QTY_INVOICED AS QtyInvoiced, t3.QTY_MATCHED AS QtyMatched, t3.STATUS_ID AS StatusID, t3.INV_COST AS InvoiceCost, t3.AMT_INVOICE_APPORTIONED AS AmtInvoiceApportioned, t3.SR_TRAN_DETAIL_PK AS ReceiptDetailPK, t3.WAREHOUSE_PK AS WarehousePK, t3.UNIT_COST AS UnitCost, t3.QTY_RECEIVED AS QtyReceived, t3.EXT_COST AS ExtendedCost, t3.QTY_REJECTED AS QtyRejected, t3.REASON_FOR_REJECTION AS ReasonforRejection, t3.BILL_OF_LADING AS BillofLading, t3.ITEM_ID AS ItemID, t3.WAREHOUSE_ID AS WarehouseID, t3.ITEM_PK AS ItemPK, t3.UOM_PK AS UomPK, t3.UOM_ID AS UomID, t3.QTY_FOR_BASE_UOM AS BaseUOM, t3.UNIT_COST_FOR_BASE_UOM AS UnitCostforBaseUOM, t3.ITEM_NAME AS ItemName, t3.ITEM_ALTERNATE_NAME AS ItemAlternateName, t3.PO_DETAIL_PK AS PODetailPK FROM PE_POP_SR_POSTED_TRAN_HEAD t1, PE_POP_PO_HEADER t2, PE_POP_SR_POSTED_TRAN_DET t3 Where t1.SR_TRAN_HEAD_PK = t3.SR_TRAN_HEAD_PK and (t1.PO_HEADER_PK *= t2.PO_HEADER_PK or t3.PO_HEADER_PK *= t2.PO_HEADER_PK)