Caché Transact-SQL (TSQL) Migration Guide - InterSystems ...

TSQL CommandsThe optional WITH CHECK OPTION clause prevents an update through the view that makes the record inaccessible tothat view. It does this by checking the WITH clause in the SELECT statement. WITH CHECK OPTION binds to CachéSQL using the default of CASCADE.4.1.9 DROP VIEWDeletes a view definition. You can delete a single view, or a comma-separated list of views. DROP VIEW ignores anonexistent view name and completes without error.4.2 Data Management Language (DML) Statements4.2.1 DELETEDeletes rows of data from a table. Both DELETE and DELETE FROM are supported. Most other options are supported,with the following exceptions:• FROM table hints• rowset functions• OPTION clause• join hints• only very simple theta joins are supported (the FROM table clause is transformed into nested subqueries)• primary table hintsThe following table_hints are parsed but ignored: FASTFIRSTROW, HOLDINDEX, INDEX(name), NOLOCK, PAGLOCK,READCOMMITTED, READPAST, READUNCOMMITTED, REPEATABLEREAD, ROWLOCK, SERIALIZABLE,SHARED, TABLOCK, TABLOCKX, UPDLOCK, XLOCK. Table hints can be optionally preceded by the WITH keyword,and, if WITH is specified, optionally enclosed in parentheses. A list of table hints can be separated by either commas orblank spaces.DELETE sets the @@ROWCOUNT system variable to the number of rows deleted, and the @@IDENTITY systemvariable to the IDENTITY value of the last row deleted.4.2.2 INSERTInserts rows of data into a table. All three MSSQL syntactic forms are supported:INSERT column VALUES list_of_valuesINSERT column SELECT select_statementINSERT column EXECUTE stored_procedureThe corresponding Sybase list_of_values and SELECT syntactic forms are supported. (Sybase does not use the VALUESkeyword.)Most options are supported, with the following exceptions:• rowset functions• DEFAULT VALUES20 Caché Transact-SQL (TSQL) Migration Guide