Examples of org.apache.derby.iapi.sql.dictionary.SequenceDescriptor

Package org.apache.derby.iapi.sql.dictionary

Examples of org.apache.derby.iapi.sql.dictionary.SequenceDescriptor

org.apache.derby.iapi.sql.dictionary.SequenceDescriptor
This class is used by rows in the SYS.SYSSEQUENCES system table. See the header comment of SYSSEQUENCESRowFactory for the contract of that table. In particular, if the CURRENTVALUE column is null, then the sequence has been exhausted and no more values can be generated from it.

             TupleDescriptor parentTupleDescriptor,
             DataDictionary dd)
            throws StandardException {


        DataValueDescriptor col;
        SequenceDescriptor descriptor;
        UUID ouuid;
        String sequenceName;
        UUID suuid;
        Long currentValue;
        long startValue;

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            _dd.computeSequenceRowLocation( readOnlyTC, _uuidString, rowLocation, sequenceDescriptor );
            
            _sequenceRowLocation = rowLocation[ 0 ];
            
            SequenceDescriptor isd = sequenceDescriptor[ 0 ];
            
            return new SequenceGenerator
                (
                 isd.getCurrentValue(),
                 isd.canCycle(),
                 isd.getIncrement(),
                 isd.getMaximumValue(),
                 isd.getMinimumValue(),
                 isd.getStartValue(),
                 isd.getSchemaDescriptor().getSchemaName(),
                 isd.getSequenceName(),
                 makePreallocator( readOnlyTC )
                 );
        }

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        if (
            targetTableDescriptor.tableHasAutoincrement() &&
            dd.checkVersion( DataDictionary.DD_VERSION_DERBY_10_11, null )
            )
        {
            SequenceDescriptor  seq = dd.getSequenceDescriptor
                (
                 dd.getSystemSchemaDescriptor(),
                 TableDescriptor.makeSequenceName( targetTableDescriptor.getUUID() )
                 );
            identitySequenceUUIDString = seq.getUUID().toString();
        }
        
        getCompilerContext().removePrivilegeFilter( ignorePermissions );
    getCompilerContext().popCurrentPrivType();
  }

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                csca.executeConstantAction( activation );


                // reset the current value of the sequence generator as necessary
                if ( columnInfo[ix].action == ColumnInfo.MODIFY_COLUMN_DEFAULT_INCREMENT )
                {
                    SequenceDescriptor  sequence = dd.getSequenceDescriptor
                        ( dd.getSystemSchemaDescriptor(), sequenceName );
                    RowLocation[] rowLocation = new RowLocation[ 1 ];
                    SequenceDescriptor[] sequenceDescriptor = new SequenceDescriptor[ 1 ];
            
                    dd.computeSequenceRowLocation
                        ( tc, sequence.getUUID().toString(), rowLocation, sequenceDescriptor );
                    dd.updateCurrentSequenceValue
                        ( tc, rowLocation[ 0 ], true, null, currentValue );
                }
                
            }

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            _dd.computeSequenceRowLocation( readOnlyTC, _uuidString, rowLocation, sequenceDescriptor );
            
            _sequenceRowLocation = rowLocation[ 0 ];
            
            SequenceDescriptor isd = sequenceDescriptor[ 0 ];
            
            return new SequenceGenerator
                (
                 isd.getCurrentValue(),
                 isd.canCycle(),
                 isd.getIncrement(),
                 isd.getMaximumValue(),
                 isd.getMinimumValue(),
                 isd.getStartValue(),
                 isd.getSequenceName()
                 );
        }

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        ** the transaction.
        */
        dd.startWriting(lcc);
        dd.clearSequenceCaches();


        SequenceDescriptor sequenceDescriptor = dd.getSequenceDescriptor(schemaDescriptor, sequenceName);


        if (sequenceDescriptor == null) {


            throw StandardException.newException(SQLState.LANG_OBJECT_NOT_FOUND_DURING_EXECUTION, "SEQUENCE",
                    (schemaDescriptor.getObjectName() + "." + sequenceName));
        }


        sequenceDescriptor.drop(lcc);
    }

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        /* Set up the start/stop position for the scan */
        ExecIndexRow keyRow = exFactory.getIndexableRow(1);
        keyRow.setColumn(1, UUIDStringOrderable);


        SequenceDescriptor  sequenceDescriptor = (SequenceDescriptor)
                getDescriptorViaIndex(
                        SYSSEQUENCESRowFactory.SYSSEQUENCES_INDEX1_ID,
                        keyRow,
                        (ScanQualifier[][]) null,
                        ti,

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        /* Set up the start/stop position for the scan */
        ExecIndexRow keyRow = exFactory.getIndexableRow(2);
        keyRow.setColumn(1, schemaIDOrderable);
        keyRow.setColumn(2, sequenceNameOrderable);


        SequenceDescriptor  sequenceDescriptor = (SequenceDescriptor)
                getDescriptorViaIndex(
                        SYSSEQUENCESRowFactory.SYSSEQUENCES_INDEX2_ID,
                        keyRow,
                        (ScanQualifier[][]) null,
                        ti,

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            if ( uuid !=  null ) { return uuid; }
        }


        // oops, not saved in the sequenceID map yet. lookup the sequence.
        // this will save the uuid in the sequenceID map.
        SequenceDescriptor    desc = getSequenceDescriptor
            ( getSchemaDescriptor( schemaName, getTransactionCompile(), true ), sequenceName );


        if ( desc == null ) { return null; }
        else { return desc.getUUID().toString(); }
    }

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            _dd.computeSequenceRowLocation( readOnlyTC, _uuidString, rowLocation, sequenceDescriptor );
            
            _sequenceRowLocation = rowLocation[ 0 ];
            
            SequenceDescriptor isd = sequenceDescriptor[ 0 ];
            
            return new SequenceGenerator
                (
                 isd.getCurrentValue(),
                 isd.canCycle(),
                 isd.getIncrement(),
                 isd.getMaximumValue(),
                 isd.getMinimumValue(),
                 isd.getStartValue(),
                 isd.getSequenceName()
                 );
        }

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