Examples with TableDescriptor org.apache.derby.iapi.sql.dictionary.TableDescriptor used on opensource projects

Example 66 with TableDescriptor

use of org.apache.derby.iapi.sql.dictionary.TableDescriptor in project derby by apache.

the class DataDictionaryImpl method hashAllTableDescriptorsByTableId.

/**
 * Get all of the TableDescriptors in the database and hash them
 * by TableId This is useful as a performance optimization for the
 * locking VTIs.  NOTE: This method will scan SYS.SYSTABLES and
 * SYS.SYSSCHEMAS at READ UNCOMMITTED.
 *
 * @param tc		TransactionController for the transaction
 *
 * @return	A Hashtable with all of the Table descriptors in the database
 *			hashed by TableId
 *
 * @exception StandardException		Thrown on failure
 */
@SuppressWarnings("UseOfObsoleteCollectionType")
public Hashtable<UUID, TableDescriptor> hashAllTableDescriptorsByTableId(TransactionController tc) throws StandardException {
    Hashtable<UUID, TableDescriptor> ht = new Hashtable<UUID, TableDescriptor>();
    ScanController scanController;
    ExecRow outRow;
    TabInfoImpl ti = coreInfo[SYSTABLES_CORE_NUM];
    SYSTABLESRowFactory rf = (SYSTABLESRowFactory) ti.getCatalogRowFactory();
    outRow = rf.makeEmptyRow();
    scanController = tc.openScan(// sys.systable
    ti.getHeapConglomerate(), // don't hold open across commit
    false, // for read
    0, // scans whole table.
    TransactionController.MODE_RECORD, TransactionController.ISOLATION_READ_UNCOMMITTED, // all fields as objects
    (FormatableBitSet) null, // start position - first row
    (DataValueDescriptor[]) null, // startSearchOperation
    ScanController.GE, // scanQualifier,
    (ScanQualifier[][]) null, // stop position-through last row
    (DataValueDescriptor[]) null, // stopSearchOperation
    ScanController.GT);
    // fetch() may find the row deleted or purged from the table.
    while (scanController.fetchNext(outRow.getRowArray())) {
        TableDescriptor td = (TableDescriptor) rf.buildDescriptor(outRow, (TupleDescriptor) null, this, TransactionController.ISOLATION_READ_UNCOMMITTED);
        ht.put(td.getUUID(), td);
    }
    scanController.close();
    return ht;
}

Example 67 with TableDescriptor

use of org.apache.derby.iapi.sql.dictionary.TableDescriptor in project derby by apache.

the class DataDictionaryImpl method getForeignKeys.

/**
 * Return a list of foreign keys constraints referencing
 * this constraint.  Returns both enforced and not enforced
 * foreign keys.
 *
 * @param constraintId	The id of the referenced constraint
 *
 * @return	list of constraints, empty of there are none
 *
 * @exception StandardException		Thrown on error
 */
public ConstraintDescriptorList getForeignKeys(UUID constraintId) throws StandardException {
    TabInfoImpl ti = getNonCoreTI(SYSFOREIGNKEYS_CATALOG_NUM);
    List<SubKeyConstraintDescriptor> fkList = newSList();
    // Use constraintIDOrderable in both start and stop positions for scan
    DataValueDescriptor constraintIDOrderable = getIDValueAsCHAR(constraintId);
    /* Set up the start/stop position for the scan */
    ExecIndexRow keyRow = (ExecIndexRow) exFactory.getIndexableRow(1);
    keyRow.setColumn(1, constraintIDOrderable);
    getDescriptorViaIndex(SYSFOREIGNKEYSRowFactory.SYSFOREIGNKEYS_INDEX2_ID, keyRow, (ScanQualifier[][]) null, ti, (TupleDescriptor) null, fkList, SubKeyConstraintDescriptor.class, false);
    TableDescriptor td;
    ConstraintDescriptorList cdl = new ConstraintDescriptorList();
    for (SubKeyConstraintDescriptor cd : fkList) {
        td = getConstraintTableDescriptor(cd.getUUID());
        cdl.add(getConstraintDescriptors(td).getConstraintDescriptorById(cd.getUUID()));
    }
    return cdl;
}

Example 68 with TableDescriptor

use of org.apache.derby.iapi.sql.dictionary.TableDescriptor in project derby by apache.

the class DataDictionaryImpl method createIdentitySequences.

/**
 * Create sequence generators for all identity columns on upgrade to 10.11.
 */
void createIdentitySequences(TransactionController tc) throws StandardException {
    Hashtable<UUID, TableDescriptor> tableMap = hashAllTableDescriptorsByTableId(tc);
    for (UUID tableID : tableMap.keySet()) {
        TableDescriptor td = getTableDescriptor(tableID);
        ColumnDescriptorList cdl = td.getColumnDescriptorList();
        for (ColumnDescriptor cd : cdl) {
            if (cd.isAutoincrement()) {
                createIdentitySequence(td, cd, tc);
            }
        }
    }
}

Example 69 with TableDescriptor

use of org.apache.derby.iapi.sql.dictionary.TableDescriptor in project derby by apache.

the class DataDictionaryImpl method peekAtIdentity.

public Long peekAtIdentity(String schemaName, String tableName) throws StandardException {
    LanguageConnectionContext lcc = getLCC();
    TransactionController tc = lcc.getTransactionExecute();
    SchemaDescriptor sd = getSchemaDescriptor(schemaName, tc, true);
    TableDescriptor td = getTableDescriptor(tableName, sd, tc);
    if (td == null) {
        throw StandardException.newException(SQLState.LANG_OBJECT_NOT_FOUND_DURING_EXECUTION, "TABLE", (schemaName + "." + tableName));
    }
    return peekAtSequence(SchemaDescriptor.STD_SYSTEM_SCHEMA_NAME, TableDescriptor.makeSequenceName(td.getUUID()));
}

Example 70 with TableDescriptor

use of org.apache.derby.iapi.sql.dictionary.TableDescriptor in project derby by apache.

the class SYSCONSTRAINTSRowFactory method buildDescriptor.

// /////////////////////////////////////////////////////////////////////////
// 
// ABSTRACT METHODS TO BE IMPLEMENTED BY CHILDREN OF CatalogRowFactory
// 
// /////////////////////////////////////////////////////////////////////////
/**
 * Make a ConstraintDescriptor out of a SYSCONSTRAINTS row
 *
 * @param row a SYSCONSTRAINTS row
 * @param parentTupleDescriptor	Subconstraint descriptor with auxiliary info.
 * @param dd dataDictionary
 *
 * @exception   StandardException thrown on failure
 */
public TupleDescriptor buildDescriptor(ExecRow row, TupleDescriptor parentTupleDescriptor, DataDictionary dd) throws StandardException {
    ConstraintDescriptor constraintDesc = null;
    if (SanityManager.DEBUG) {
        SanityManager.ASSERT(row.nColumns() == SYSCONSTRAINTS_COLUMN_COUNT, "Wrong number of columns for a SYSCONSTRAINTS row");
    }
    DataValueDescriptor col;
    ConglomerateDescriptor conglomDesc;
    DataDescriptorGenerator ddg;
    TableDescriptor td = null;
    int constraintIType = -1;
    int[] keyColumns = null;
    UUID constraintUUID;
    UUID schemaUUID;
    UUID tableUUID;
    UUID referencedConstraintId = null;
    SchemaDescriptor schema;
    String tableUUIDString;
    String constraintName;
    String constraintSType;
    String constraintStateStr;
    boolean deferrable = ConstraintDefinitionNode.DEFERRABLE_DEFAULT;
    boolean initiallyDeferred = ConstraintDefinitionNode.INITIALLY_DEFERRED_DEFAULT;
    boolean enforced = ConstraintDefinitionNode.ENFORCED_DEFAULT;
    int referenceCount;
    String constraintUUIDString;
    String schemaUUIDString;
    SubConstraintDescriptor scd;
    if (SanityManager.DEBUG) {
        if (!(parentTupleDescriptor instanceof SubConstraintDescriptor)) {
            SanityManager.THROWASSERT("parentTupleDescriptor expected to be instanceof " + "SubConstraintDescriptor, not " + parentTupleDescriptor.getClass().getName());
        }
    }
    scd = (SubConstraintDescriptor) parentTupleDescriptor;
    ddg = dd.getDataDescriptorGenerator();
    /* 1st column is CONSTRAINTID (UUID - char(36)) */
    col = row.getColumn(SYSCONSTRAINTS_CONSTRAINTID);
    constraintUUIDString = col.getString();
    constraintUUID = getUUIDFactory().recreateUUID(constraintUUIDString);
    /* 2nd column is TABLEID (UUID - char(36)) */
    col = row.getColumn(SYSCONSTRAINTS_TABLEID);
    tableUUIDString = col.getString();
    tableUUID = getUUIDFactory().recreateUUID(tableUUIDString);
    /* Get the TableDescriptor.  
		 * It may be cached in the SCD, 
		 * otherwise we need to go to the
		 * DD.
		 */
    if (scd != null) {
        td = scd.getTableDescriptor();
    }
    if (td == null) {
        td = dd.getTableDescriptor(tableUUID);
    }
    /* 3rd column is NAME (varchar(128)) */
    col = row.getColumn(SYSCONSTRAINTS_CONSTRAINTNAME);
    constraintName = col.getString();
    /* 4th column is TYPE (char(1)) */
    col = row.getColumn(SYSCONSTRAINTS_TYPE);
    constraintSType = col.getString();
    if (SanityManager.DEBUG) {
        SanityManager.ASSERT(constraintSType.length() == 1, "Fourth column type incorrect");
    }
    boolean typeSet = false;
    switch(constraintSType.charAt(0)) {
        case 'P':
            constraintIType = DataDictionary.PRIMARYKEY_CONSTRAINT;
            typeSet = true;
        case 'U':
            if (!typeSet) {
                constraintIType = DataDictionary.UNIQUE_CONSTRAINT;
                typeSet = true;
            }
        case 'F':
            if (!typeSet)
                constraintIType = DataDictionary.FOREIGNKEY_CONSTRAINT;
            if (SanityManager.DEBUG) {
                if (!(parentTupleDescriptor instanceof SubKeyConstraintDescriptor)) {
                    SanityManager.THROWASSERT("parentTupleDescriptor expected to be instanceof " + "SubKeyConstraintDescriptor, not " + parentTupleDescriptor.getClass().getName());
                }
            }
            conglomDesc = td.getConglomerateDescriptor(((SubKeyConstraintDescriptor) parentTupleDescriptor).getIndexId());
            /* Take care the rare case of conglomDesc being null.  The
				 * reason is that our "td" is out of date.  Another thread
				 * which was adding a constraint committed between the moment
				 * we got the table descriptor (conglomerate list) and the
				 * moment we scanned and got the constraint desc list.  Since
				 * that thread just added a new row to SYSCONGLOMERATES, 
				 * SYSCONSTRAINTS, etc.  We wouldn't have wanted to lock the
				 * system tables just to prevent other threads from adding new
				 * rows.
				 */
            if (conglomDesc == null) {
                // we can't be getting td from cache because if we are
                // here, we must have been in dd's ddl mode (that's why
                // the ddl thread went through), we are not done yet, the
                // dd ref count is not 0, hence it couldn't have turned
                // into COMPILE_ONLY mode
                td = dd.getTableDescriptor(tableUUID);
                if (scd != null)
                    scd.setTableDescriptor(td);
                // try again now
                conglomDesc = td.getConglomerateDescriptor(((SubKeyConstraintDescriptor) parentTupleDescriptor).getIndexId());
            }
            if (SanityManager.DEBUG) {
                SanityManager.ASSERT(conglomDesc != null, "conglomDesc is expected to be non-null for backing index");
            }
            keyColumns = conglomDesc.getIndexDescriptor().baseColumnPositions();
            referencedConstraintId = ((SubKeyConstraintDescriptor) parentTupleDescriptor).getKeyConstraintId();
            keyColumns = conglomDesc.getIndexDescriptor().baseColumnPositions();
            break;
        case 'C':
            constraintIType = DataDictionary.CHECK_CONSTRAINT;
            if (SanityManager.DEBUG) {
                if (!(parentTupleDescriptor instanceof SubCheckConstraintDescriptor)) {
                    SanityManager.THROWASSERT("parentTupleDescriptor expected to be instanceof " + "SubCheckConstraintDescriptor, not " + parentTupleDescriptor.getClass().getName());
                }
            }
            break;
        default:
            if (SanityManager.DEBUG) {
                SanityManager.THROWASSERT("Fourth column value invalid");
            }
    }
    /* 5th column is SCHEMAID (UUID - char(36)) */
    col = row.getColumn(SYSCONSTRAINTS_SCHEMAID);
    schemaUUIDString = col.getString();
    schemaUUID = getUUIDFactory().recreateUUID(schemaUUIDString);
    schema = dd.getSchemaDescriptor(schemaUUID, null);
    /* 6th column is STATE (char(1)) */
    col = row.getColumn(SYSCONSTRAINTS_STATE);
    constraintStateStr = col.getString();
    if (SanityManager.DEBUG) {
        SanityManager.ASSERT(constraintStateStr.length() == 1, "Sixth column (state) type incorrect");
    }
    // 
    switch(constraintStateStr.charAt(0)) {
        case 'E':
            deferrable = false;
            initiallyDeferred = false;
            enforced = true;
            break;
        case 'D':
            deferrable = false;
            initiallyDeferred = false;
            enforced = false;
            break;
        case 'e':
            deferrable = true;
            initiallyDeferred = true;
            enforced = true;
            break;
        case 'd':
            deferrable = true;
            initiallyDeferred = true;
            enforced = false;
            break;
        case 'i':
            deferrable = true;
            initiallyDeferred = false;
            enforced = true;
            break;
        case 'j':
            deferrable = true;
            initiallyDeferred = false;
            enforced = false;
            break;
        default:
            if (SanityManager.DEBUG) {
                SanityManager.THROWASSERT("Invalidate state value '" + constraintStateStr + "' for constraint");
            }
    }
    /* 7th column is REFERENCECOUNT, boolean */
    col = row.getColumn(SYSCONSTRAINTS_REFERENCECOUNT);
    referenceCount = col.getInt();
    switch(constraintIType) {
        case DataDictionary.PRIMARYKEY_CONSTRAINT:
            constraintDesc = ddg.newPrimaryKeyConstraintDescriptor(td, constraintName, deferrable, initiallyDeferred, // genReferencedColumns(dd, td), //int referencedColumns[],
            keyColumns, constraintUUID, ((SubKeyConstraintDescriptor) parentTupleDescriptor).getIndexId(), schema, enforced, referenceCount);
            break;
        case DataDictionary.UNIQUE_CONSTRAINT:
            constraintDesc = ddg.newUniqueConstraintDescriptor(td, constraintName, deferrable, initiallyDeferred, // genReferencedColumns(dd, td), //int referencedColumns[],
            keyColumns, constraintUUID, ((SubKeyConstraintDescriptor) parentTupleDescriptor).getIndexId(), schema, enforced, referenceCount);
            break;
        case DataDictionary.FOREIGNKEY_CONSTRAINT:
            if (SanityManager.DEBUG) {
                SanityManager.ASSERT(referenceCount == 0, "REFERENCECOUNT column is nonzero for fk constraint");
            }
            constraintDesc = ddg.newForeignKeyConstraintDescriptor(td, constraintName, deferrable, initiallyDeferred, // genReferencedColumns(dd, td), //int referencedColumns[],
            keyColumns, constraintUUID, ((SubKeyConstraintDescriptor) parentTupleDescriptor).getIndexId(), schema, referencedConstraintId, enforced, ((SubKeyConstraintDescriptor) parentTupleDescriptor).getRaDeleteRule(), ((SubKeyConstraintDescriptor) parentTupleDescriptor).getRaUpdateRule());
            break;
        case DataDictionary.CHECK_CONSTRAINT:
            if (SanityManager.DEBUG) {
                SanityManager.ASSERT(referenceCount == 0, "REFERENCECOUNT column is nonzero for check constraint");
            }
            constraintDesc = ddg.newCheckConstraintDescriptor(td, constraintName, deferrable, initiallyDeferred, constraintUUID, ((SubCheckConstraintDescriptor) parentTupleDescriptor).getConstraintText(), ((SubCheckConstraintDescriptor) parentTupleDescriptor).getReferencedColumnsDescriptor(), schema, enforced);
            break;
    }
    return constraintDesc;
}