The ability to create Arrays like this is one of the features that differentiates Cache/Ensemble/IRIS from any other Database Technology. An index on Property X will generate a Global Reference: ^GlobalI("".^GlobalD(RowId)=$lb(Property1,Property2.,PropertyN).The Global reference for the Data Global looks like this:.Unique is implicit in that you cannot have two different records with the same RowId value. IDKey says that the property Value is the Object.%Id() and is the Object Identifier. PrimaryKey says that the property value is the RowId for each row in the Table. The RowId can be overridden by creating an Index on a property of the class and assigning it the attributes.The RowId is referenced by the column named "ID" By default, the RowId is a Sequential Contiguous Integer starting from 1.$list creates a couple of bytes at the beginning of each field that informs the Compiler how long the field is and the base datatype of the field: String, Number, Boolean and Bit. It stores Indices for the Class/Table in a Global ending with an "I" and puts Stream data into a Global where the Name ends with an "S" Stores data in a Global whose name ends with a "D".Is the Storage model used when you create a new Class/Table in Ensemble/IRIS.So I am going to answer but I am going to abbreviate the explanation as I don't have enough time to rewrite the whole document I wrote yesterday. I wrote about 400 lines of explanation and then my laptop rebooted to install some updates and I lost everything I wrote. I started writing a response to your questions yesterday afternoon and I wrote a lengthy explanation using LabTrak as the basis for my response. ID for one table being used to query another) or indices are out of sync or corrupted (rebuilding indices should fix this). As for the different results, it may be you're passing the wrong value to the query (eg. You may need to look deeper depending on whether table correspond to a global mapped (legacy) table or a "pure" SQL table. If you're looking for a programmatically way to see the primary (assuming you don't have access to the code) then you could check information_schema.key_column_usage for constraint_type = "PRIMARY KEY". The fields listed there are the ones that correspond to the primary key of each of the tables displayed. The primary keys for the tables in the ERD diagram are listed in your posted image. If a FK is required then it should be defined manually. The reason relationships are not showing in ERD is because adding an object reference from one class to another doesn't generate a ForeignKey (only relationships do this automatically) thus no relationship is defined in the generated ERD. We may need more clarity to answer the specific question you have but here are some answers to things I could pull from your post: LEFT JOIN SQLUser.PAC_FacilityType PFT ON CTH.HOSP_Desc = PFT.FACIL_Descīut please may I know how am I supposed to know when table’s primary key / foreign key do not match and doesn’t show any relationship in ERD as below.īut when I extracted the ERD diagram of CT_Loc and CT_ Hospital they do not have any relationship and when I used the rowID, I got wrong answers.Īny detailed explanation will help, with reference to documentation will be appreciated. Same as SELECT * from SQLUser.CT_Hospital CTH LEFT JOIN SQLUser.CT_Loc CTL ON CTL.CTLOC_Desc = ? I would like to do something like this Select * FROM This is what I tried: Tired to create ERD diagrams and try to extract Primary and Foreign keys to associate, but I cannot in this case
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