Examples with SQLTable org.datanucleus.store.rdbms.sql.SQLTable used on opensource projects

Example 26 with SQLTable

use of org.datanucleus.store.rdbms.sql.SQLTable in project datanucleus-rdbms by datanucleus.

the class JoinSetStore method getIteratorStatement.

/**
 * Method to return the SQLStatement and mapping for an iterator for this backing store.
 * Create a statement of the form
 * <pre>
 * SELECT ELEM_COLS
 * FROM JOIN_TBL
 *   [JOIN ELEM_TBL ON ELEM_TBL.ID = JOIN_TBL.ELEM_ID]
 * [WHERE]
 *   [JOIN_TBL.OWNER_ID = {value}] [AND]
 *   [JOIN_TBL.DISCRIM = {discrimValue}]
 * [ORDER BY {orderClause}]
 * </pre>
 * @param ec ExecutionContext
 * @param fp FetchPlan to use in determining which fields of element to select
 * @param addRestrictionOnOwner Whether to restrict to a particular owner (otherwise functions as bulk fetch for many owners).
 * @return The SQLStatement and its associated StatementClassMapping
 */
public IteratorStatement getIteratorStatement(ExecutionContext ec, FetchPlan fp, boolean addRestrictionOnOwner) {
    SelectStatement sqlStmt = null;
    SQLExpressionFactory exprFactory = storeMgr.getSQLExpressionFactory();
    StatementClassMapping iteratorMappingClass = null;
    if (elementsAreEmbedded || elementsAreSerialised) {
        // Element = embedded, serialised (maybe Non-PC)
        // Just select the join table since we're going to return the embedded/serialised columns from it
        sqlStmt = new SelectStatement(storeMgr, containerTable, null, null);
        sqlStmt.setClassLoaderResolver(clr);
        // Select the element column - first select is assumed by SetStoreIterator
        sqlStmt.select(sqlStmt.getPrimaryTable(), elementMapping, null);
    // TODO If embedded element and it includes 1-1/N-1 in FetchPlan then select its fields also
    } else if (elementMapping instanceof ReferenceMapping) {
        // Element = Reference type (interface/Object)
        // Just select the join table since we're going to return the implementation id columns only
        sqlStmt = new SelectStatement(storeMgr, containerTable, null, null);
        sqlStmt.setClassLoaderResolver(clr);
        // Select the reference column(s) - first select is assumed by SetStoreIterator
        sqlStmt.select(sqlStmt.getPrimaryTable(), elementMapping, null);
    } else {
        // Element = PC
        // Join to the element table(s)
        iteratorMappingClass = new StatementClassMapping();
        for (int i = 0; i < elementInfo.length; i++) {
            final int elementNo = i;
            final Class elementCls = clr.classForName(elementInfo[elementNo].getClassName());
            SelectStatement elementStmt = null;
            if (elementInfo[elementNo].getDiscriminatorStrategy() != null && elementInfo[elementNo].getDiscriminatorStrategy() != DiscriminatorStrategy.NONE) {
                // The element uses a discriminator so just use that in the SELECT
                String elementType = ownerMemberMetaData.getCollection().getElementType();
                if (ClassUtils.isReferenceType(clr.classForName(elementType))) {
                    String[] clsNames = storeMgr.getNucleusContext().getMetaDataManager().getClassesImplementingInterface(elementType, clr);
                    Class[] cls = new Class[clsNames.length];
                    for (int j = 0; j < clsNames.length; j++) {
                        cls[j] = clr.classForName(clsNames[j]);
                    }
                    SelectStatementGenerator stmtGen = new DiscriminatorStatementGenerator(storeMgr, clr, cls, true, null, null, containerTable, null, elementMapping);
                    if (allowNulls) {
                        stmtGen.setOption(SelectStatementGenerator.OPTION_ALLOW_NULLS);
                    }
                    elementStmt = stmtGen.getStatement(ec);
                } else {
                    SelectStatementGenerator stmtGen = new DiscriminatorStatementGenerator(storeMgr, clr, elementCls, true, null, null, containerTable, null, elementMapping);
                    if (allowNulls) {
                        stmtGen.setOption(SelectStatementGenerator.OPTION_ALLOW_NULLS);
                    }
                    elementStmt = stmtGen.getStatement(ec);
                }
                iterateUsingDiscriminator = true;
            } else {
                // No discriminator, but subclasses so use UNIONs
                SelectStatementGenerator stmtGen = new UnionStatementGenerator(storeMgr, clr, elementCls, true, null, null, containerTable, null, elementMapping);
                stmtGen.setOption(SelectStatementGenerator.OPTION_SELECT_DN_TYPE);
                iteratorMappingClass.setNucleusTypeColumnName(UnionStatementGenerator.DN_TYPE_COLUMN);
                elementStmt = stmtGen.getStatement(ec);
            }
            // TODO What if the first elementInfo has fields selected in one order and then the second in a different order?
            if (sqlStmt == null) {
                sqlStmt = elementStmt;
                // Select the required fields
                SQLTable elementSqlTbl = sqlStmt.getTable(elementInfo[i].getDatastoreClass(), sqlStmt.getPrimaryTable().getGroupName());
                SQLStatementHelper.selectFetchPlanOfSourceClassInStatement(sqlStmt, iteratorMappingClass, fp, elementSqlTbl, elementCmd, fp.getMaxFetchDepth());
            } else {
                // Select the required fields
                SQLTable elementSqlTbl = elementStmt.getTable(elementInfo[i].getDatastoreClass(), elementStmt.getPrimaryTable().getGroupName());
                SQLStatementHelper.selectFetchPlanOfSourceClassInStatement(elementStmt, iteratorMappingClass, fp, elementSqlTbl, elementCmd, fp.getMaxFetchDepth());
                sqlStmt.union(elementStmt);
            }
        }
    }
    if (sqlStmt == null) {
        throw new NucleusException("Error in generation of SQL statement for iterator over (Join) set. Statement is null");
    }
    if (addRestrictionOnOwner) {
        // Apply condition on join-table owner field to filter by owner
        SQLTable ownerSqlTbl = SQLStatementHelper.getSQLTableForMappingOfTable(sqlStmt, sqlStmt.getPrimaryTable(), ownerMapping);
        SQLExpression ownerExpr = exprFactory.newExpression(sqlStmt, ownerSqlTbl, ownerMapping);
        SQLExpression ownerVal = exprFactory.newLiteralParameter(sqlStmt, ownerMapping, null, "OWNER");
        sqlStmt.whereAnd(ownerExpr.eq(ownerVal), true);
    }
    if (relationDiscriminatorMapping != null) {
        // Apply condition on distinguisher field to filter by distinguisher (when present)
        SQLTable distSqlTbl = SQLStatementHelper.getSQLTableForMappingOfTable(sqlStmt, sqlStmt.getPrimaryTable(), relationDiscriminatorMapping);
        SQLExpression distExpr = exprFactory.newExpression(sqlStmt, distSqlTbl, relationDiscriminatorMapping);
        SQLExpression distVal = exprFactory.newLiteral(sqlStmt, relationDiscriminatorMapping, relationDiscriminatorValue);
        sqlStmt.whereAnd(distExpr.eq(distVal), true);
    }
    if (orderMapping != null) {
        // TODO If we have multiple roots then cannot allow this
        // Order by the ordering column, when present
        SQLTable orderSqlTbl = SQLStatementHelper.getSQLTableForMappingOfTable(sqlStmt, sqlStmt.getPrimaryTable(), orderMapping);
        SQLExpression[] orderExprs = new SQLExpression[orderMapping.getNumberOfDatastoreMappings()];
        boolean[] descendingOrder = new boolean[orderMapping.getNumberOfDatastoreMappings()];
        orderExprs[0] = exprFactory.newExpression(sqlStmt, orderSqlTbl, orderMapping);
        sqlStmt.setOrdering(orderExprs, descendingOrder);
    }
    return new IteratorStatement(this, sqlStmt, iteratorMappingClass);
}

Example 27 with SQLTable

use of org.datanucleus.store.rdbms.sql.SQLTable in project datanucleus-rdbms by datanucleus.

the class MapEntrySetStore method getSQLStatementForIterator.

/**
 * Method to generate an SQLStatement for iterating through entries of the map.
 * Creates a statement that selects the table holding the map definition (key/value mappings).
 * Adds a restriction on the ownerMapping of the containerTable so we can restrict to the owner object.
 * Adds a restriction on the keyMapping not being null.
 * <pre>
 * SELECT KEY, VALUE FROM MAP_TABLE WHERE OWNER_ID=? AND KEY IS NOT NULL
 * </pre>
 * @param ownerOP ObjectProvider for the owner object
 * @return The SQLStatement
 */
protected SQLStatement getSQLStatementForIterator(ObjectProvider ownerOP) {
    SelectStatement sqlStmt = new SelectStatement(storeMgr, mapTable, null, null);
    sqlStmt.setClassLoaderResolver(clr);
    // Select the key mapping
    // TODO If key is persistable and has inheritance also select a discriminator to get the type
    SQLTable entrySqlTblForKey = sqlStmt.getPrimaryTable();
    if (keyMapping.getTable() != mapTable) {
        entrySqlTblForKey = sqlStmt.getTableForDatastoreContainer(keyMapping.getTable());
        if (entrySqlTblForKey == null) {
            // Add join to key table
            entrySqlTblForKey = sqlStmt.join(JoinType.INNER_JOIN, sqlStmt.getPrimaryTable(), sqlStmt.getPrimaryTable().getTable().getIdMapping(), keyMapping.getTable(), null, keyMapping.getTable().getIdMapping(), null, null, true);
        }
    }
    iteratorKeyResultCols = sqlStmt.select(entrySqlTblForKey, keyMapping, null);
    // Select the value mapping
    // TODO If value is persistable and has inheritance also select a discriminator to get the type
    SQLTable entrySqlTblForVal = sqlStmt.getPrimaryTable();
    if (valueMapping.getTable() != mapTable) {
        entrySqlTblForVal = sqlStmt.getTableForDatastoreContainer(valueMapping.getTable());
        if (entrySqlTblForVal == null) {
            // Add join to key table
            entrySqlTblForVal = sqlStmt.join(JoinType.INNER_JOIN, sqlStmt.getPrimaryTable(), sqlStmt.getPrimaryTable().getTable().getIdMapping(), valueMapping.getTable(), null, valueMapping.getTable().getIdMapping(), null, null, true);
        }
    }
    iteratorValueResultCols = sqlStmt.select(entrySqlTblForVal, valueMapping, null);
    // Apply condition on owner field to filter by owner
    SQLExpressionFactory exprFactory = storeMgr.getSQLExpressionFactory();
    SQLTable ownerSqlTbl = SQLStatementHelper.getSQLTableForMappingOfTable(sqlStmt, sqlStmt.getPrimaryTable(), ownerMapping);
    SQLExpression ownerExpr = exprFactory.newExpression(sqlStmt, ownerSqlTbl, ownerMapping);
    SQLExpression ownerVal = exprFactory.newLiteralParameter(sqlStmt, ownerMapping, null, "OWNER");
    sqlStmt.whereAnd(ownerExpr.eq(ownerVal), true);
    // Apply condition that key is not null
    SQLExpression keyExpr = exprFactory.newExpression(sqlStmt, sqlStmt.getPrimaryTable(), keyMapping);
    SQLExpression nullExpr = exprFactory.newLiteral(sqlStmt, null, null);
    sqlStmt.whereAnd(keyExpr.ne(nullExpr), true);
    // Input parameter(s) - the owner
    int inputParamNum = 1;
    StatementMappingIndex ownerIdx = new StatementMappingIndex(ownerMapping);
    if (sqlStmt.getNumberOfUnions() > 0) {
        // Add parameter occurrence for each union of statement
        for (int j = 0; j < sqlStmt.getNumberOfUnions() + 1; j++) {
            int[] paramPositions = new int[ownerMapping.getNumberOfDatastoreMappings()];
            for (int k = 0; k < ownerMapping.getNumberOfDatastoreMappings(); k++) {
                paramPositions[k] = inputParamNum++;
            }
            ownerIdx.addParameterOccurrence(paramPositions);
        }
    } else {
        int[] paramPositions = new int[ownerMapping.getNumberOfDatastoreMappings()];
        for (int k = 0; k < ownerMapping.getNumberOfDatastoreMappings(); k++) {
            paramPositions[k] = inputParamNum++;
        }
        ownerIdx.addParameterOccurrence(paramPositions);
    }
    iteratorMappingParams = new StatementParameterMapping();
    iteratorMappingParams.addMappingForParameter("owner", ownerIdx);
    return sqlStmt;
}

Example 28 with SQLTable

use of org.datanucleus.store.rdbms.sql.SQLTable in project datanucleus-rdbms by datanucleus.

the class MapKeySetStore method getSQLStatementForIterator.

/**
 * Method to generate an SQLStatement for iterating through keys of the map.
 * Populates the iteratorMappingDef and iteratorMappingParams.
 * Creates a statement that selects the key table(s), and adds any necessary join to the containerTable
 * if that is not the key table. If the key is embedded then selects the table it is embedded in.
 * Adds a restriction on the ownerMapping of the containerTable so we can restrict to the owner object.
 * @param ownerOP ObjectProvider for the owner object
 * @return The SQLStatement
 */
protected SelectStatement getSQLStatementForIterator(ObjectProvider ownerOP) {
    SelectStatement sqlStmt = null;
    ExecutionContext ec = ownerOP.getExecutionContext();
    final ClassLoaderResolver clr = ec.getClassLoaderResolver();
    final Class keyCls = clr.classForName(elementType);
    SQLTable containerSqlTbl = null;
    MapType mapType = getOwnerMemberMetaData().getMap().getMapType();
    FetchPlan fp = ec.getFetchPlan();
    if (elementCmd != null && elementCmd.getDiscriminatorStrategyForTable() != null && elementCmd.getDiscriminatorStrategyForTable() != DiscriminatorStrategy.NONE) {
        // Map<PC, ?> where key has discriminator
        if (ClassUtils.isReferenceType(keyCls)) {
            // Take the metadata for the first implementation of the reference type
            String[] clsNames = storeMgr.getNucleusContext().getMetaDataManager().getClassesImplementingInterface(elementType, clr);
            Class[] cls = new Class[clsNames.length];
            for (int j = 0; j < clsNames.length; j++) {
                cls[j] = clr.classForName(clsNames[j]);
            }
            sqlStmt = new DiscriminatorStatementGenerator(storeMgr, clr, cls, true, null, null).getStatement(ec);
        } else {
            sqlStmt = new DiscriminatorStatementGenerator(storeMgr, clr, clr.classForName(elementInfo[0].getClassName()), true, null, null).getStatement(ec);
        }
        containerSqlTbl = sqlStmt.getPrimaryTable();
        iterateUsingDiscriminator = true;
        if (mapType == MapType.MAP_TYPE_VALUE_IN_KEY) {
            // Select key fields
            containerSqlTbl = sqlStmt.getPrimaryTable();
            iteratorMappingDef = new StatementClassMapping();
            SQLStatementHelper.selectFetchPlanOfSourceClassInStatement(sqlStmt, iteratorMappingDef, fp, sqlStmt.getPrimaryTable(), elementCmd, fp.getMaxFetchDepth());
        } else {
            // MAP_TYPE_KEY_IN_VALUE, MAP_TYPE_JOIN
            // Join to join table and select key fields
            JavaTypeMapping keyIdMapping = sqlStmt.getPrimaryTable().getTable().getIdMapping();
            containerSqlTbl = sqlStmt.join(JoinType.INNER_JOIN, sqlStmt.getPrimaryTable(), keyIdMapping, containerTable, null, elementMapping, null, null, true);
            iteratorMappingDef = new StatementClassMapping();
            SQLStatementHelper.selectFetchPlanOfSourceClassInStatement(sqlStmt, iteratorMappingDef, fp, sqlStmt.getPrimaryTable(), elementCmd, fp.getMaxFetchDepth());
        }
    } else {
        if (mapType == MapType.MAP_TYPE_VALUE_IN_KEY) {
            // Select of key in key table (allow union of possible key types)
            iteratorMappingDef = new StatementClassMapping();
            UnionStatementGenerator stmtGen = new UnionStatementGenerator(storeMgr, clr, keyCls, true, null, null);
            stmtGen.setOption(SelectStatementGenerator.OPTION_SELECT_DN_TYPE);
            iteratorMappingDef.setNucleusTypeColumnName(UnionStatementGenerator.DN_TYPE_COLUMN);
            sqlStmt = stmtGen.getStatement(ec);
            containerSqlTbl = sqlStmt.getPrimaryTable();
            SQLStatementHelper.selectFetchPlanOfSourceClassInStatement(sqlStmt, iteratorMappingDef, fp, sqlStmt.getPrimaryTable(), elementCmd, fp.getMaxFetchDepth());
        } else {
            // MAP_TYPE_KEY_IN_VALUE, MAP_TYPE_JOIN
            if (elementCmd != null) {
                // Select of key table, joining to join table
                iteratorMappingDef = new StatementClassMapping();
                UnionStatementGenerator stmtGen = new UnionStatementGenerator(storeMgr, clr, keyCls, true, null, null);
                stmtGen.setOption(SelectStatementGenerator.OPTION_SELECT_DN_TYPE);
                iteratorMappingDef.setNucleusTypeColumnName(UnionStatementGenerator.DN_TYPE_COLUMN);
                sqlStmt = stmtGen.getStatement(ec);
                JavaTypeMapping keyIdMapping = sqlStmt.getPrimaryTable().getTable().getIdMapping();
                containerSqlTbl = sqlStmt.join(JoinType.INNER_JOIN, sqlStmt.getPrimaryTable(), keyIdMapping, containerTable, null, elementMapping, null, null, true);
                SQLStatementHelper.selectFetchPlanOfSourceClassInStatement(sqlStmt, iteratorMappingDef, fp, sqlStmt.getPrimaryTable(), elementCmd, fp.getMaxFetchDepth());
            } else {
                // Select of key in join table
                sqlStmt = new SelectStatement(storeMgr, containerTable, null, null);
                sqlStmt.setClassLoaderResolver(clr);
                containerSqlTbl = sqlStmt.getPrimaryTable();
                SQLTable elemSqlTblForKey = containerSqlTbl;
                if (elementMapping.getTable() != containerSqlTbl.getTable()) {
                    elemSqlTblForKey = sqlStmt.getTableForDatastoreContainer(elementMapping.getTable());
                    if (elemSqlTblForKey == null) {
                        // Add join to element table
                        elemSqlTblForKey = sqlStmt.join(JoinType.INNER_JOIN, sqlStmt.getPrimaryTable(), sqlStmt.getPrimaryTable().getTable().getIdMapping(), elementMapping.getTable(), null, elementMapping.getTable().getIdMapping(), null, null, true);
                    }
                }
                sqlStmt.select(elemSqlTblForKey, elementMapping, null);
            }
        }
    }
    // Apply condition on owner field to filter by owner
    SQLExpressionFactory exprFactory = storeMgr.getSQLExpressionFactory();
    SQLTable ownerSqlTbl = SQLStatementHelper.getSQLTableForMappingOfTable(sqlStmt, containerSqlTbl, ownerMapping);
    SQLExpression ownerExpr = exprFactory.newExpression(sqlStmt, ownerSqlTbl, ownerMapping);
    SQLExpression ownerVal = exprFactory.newLiteralParameter(sqlStmt, ownerMapping, null, "OWNER");
    sqlStmt.whereAnd(ownerExpr.eq(ownerVal), true);
    // Input parameter(s) - the owner
    int inputParamNum = 1;
    StatementMappingIndex ownerIdx = new StatementMappingIndex(ownerMapping);
    if (sqlStmt.getNumberOfUnions() > 0) {
        // Add parameter occurrence for each union of statement
        for (int j = 0; j < sqlStmt.getNumberOfUnions() + 1; j++) {
            int[] paramPositions = new int[ownerMapping.getNumberOfDatastoreMappings()];
            for (int k = 0; k < ownerMapping.getNumberOfDatastoreMappings(); k++) {
                paramPositions[k] = inputParamNum++;
            }
            ownerIdx.addParameterOccurrence(paramPositions);
        }
    } else {
        int[] paramPositions = new int[ownerMapping.getNumberOfDatastoreMappings()];
        for (int k = 0; k < ownerMapping.getNumberOfDatastoreMappings(); k++) {
            paramPositions[k] = inputParamNum++;
        }
        ownerIdx.addParameterOccurrence(paramPositions);
    }
    iteratorMappingParams = new StatementParameterMapping();
    iteratorMappingParams.addMappingForParameter("owner", ownerIdx);
    return sqlStmt;
}

Example 29 with SQLTable

use of org.datanucleus.store.rdbms.sql.SQLTable in project datanucleus-rdbms by datanucleus.

the class MapValueCollectionStore method getSQLStatementForIterator.

/**
 * Method to generate an SQLStatement for iterating through values of the map.
 * Populates the iteratorMappingDef and iteratorMappingParams.
 * Creates a statement that selects the value table(s), and adds any necessary join to the containerTable
 * if that is not the value table. If the value is embedded then selects the table it is embedded in.
 * Adds a restriction on the ownerMapping of the containerTable so we can restrict to the owner object.
 * @param ownerOP ObjectProvider for the owner object
 * @return The SQLStatement
 */
protected SelectStatement getSQLStatementForIterator(ObjectProvider ownerOP) {
    SelectStatement sqlStmt = null;
    ExecutionContext ec = ownerOP.getExecutionContext();
    final ClassLoaderResolver clr = ec.getClassLoaderResolver();
    final Class valueCls = clr.classForName(elementType);
    SQLTable containerSqlTbl = null;
    MapType mapType = getOwnerMemberMetaData().getMap().getMapType();
    FetchPlan fp = ec.getFetchPlan();
    if (elementCmd != null && elementCmd.getDiscriminatorStrategyForTable() != null && elementCmd.getDiscriminatorStrategyForTable() != DiscriminatorStrategy.NONE) {
        // Map<?, PC> where value has discriminator
        if (ClassUtils.isReferenceType(valueCls)) {
            // Take the metadata for the first implementation of the reference type
            String[] clsNames = storeMgr.getNucleusContext().getMetaDataManager().getClassesImplementingInterface(elementType, clr);
            Class[] cls = new Class[clsNames.length];
            for (int j = 0; j < clsNames.length; j++) {
                cls[j] = clr.classForName(clsNames[j]);
            }
            SelectStatementGenerator stmtGen = new DiscriminatorStatementGenerator(storeMgr, clr, cls, true, null, null);
            sqlStmt = stmtGen.getStatement(ec);
        } else {
            SelectStatementGenerator stmtGen = new DiscriminatorStatementGenerator(storeMgr, clr, valueCls, true, null, null);
            sqlStmt = stmtGen.getStatement(ec);
        }
        iterateUsingDiscriminator = true;
        if (mapType == MapType.MAP_TYPE_VALUE_IN_KEY) {
            // Join to key table and select value fields
            JavaTypeMapping valueIdMapping = sqlStmt.getPrimaryTable().getTable().getIdMapping();
            containerSqlTbl = sqlStmt.join(JoinType.INNER_JOIN, sqlStmt.getPrimaryTable(), valueIdMapping, containerTable, null, elementMapping, null, null, true);
            iteratorMappingDef = new StatementClassMapping();
            SQLStatementHelper.selectFetchPlanOfSourceClassInStatement(sqlStmt, iteratorMappingDef, fp, sqlStmt.getPrimaryTable(), elementCmd, fp.getMaxFetchDepth());
        } else if (mapType == MapType.MAP_TYPE_KEY_IN_VALUE) {
            // Select value fields
            containerSqlTbl = sqlStmt.getPrimaryTable();
            iteratorMappingDef = new StatementClassMapping();
            SQLStatementHelper.selectFetchPlanOfSourceClassInStatement(sqlStmt, iteratorMappingDef, fp, sqlStmt.getPrimaryTable(), elementCmd, fp.getMaxFetchDepth());
        } else {
            // Join to join table and select value fields
            JavaTypeMapping valueIdMapping = sqlStmt.getPrimaryTable().getTable().getIdMapping();
            containerSqlTbl = sqlStmt.join(JoinType.INNER_JOIN, sqlStmt.getPrimaryTable(), valueIdMapping, containerTable, null, elementMapping, null, null, true);
            iteratorMappingDef = new StatementClassMapping();
            SQLStatementHelper.selectFetchPlanOfSourceClassInStatement(sqlStmt, iteratorMappingDef, fp, sqlStmt.getPrimaryTable(), elementCmd, fp.getMaxFetchDepth());
        }
    } else {
        if (mapType == MapType.MAP_TYPE_VALUE_IN_KEY) {
            if (elementCmd != null) {
                // TODO Allow for null value [change to select the key table and left outer join to the key]
                // Select of value table, joining to key table
                iteratorMappingDef = new StatementClassMapping();
                UnionStatementGenerator stmtGen = new UnionStatementGenerator(storeMgr, clr, valueCls, true, null, null);
                stmtGen.setOption(SelectStatementGenerator.OPTION_SELECT_DN_TYPE);
                iteratorMappingDef.setNucleusTypeColumnName(UnionStatementGenerator.DN_TYPE_COLUMN);
                sqlStmt = stmtGen.getStatement(ec);
                JavaTypeMapping valueIdMapping = sqlStmt.getPrimaryTable().getTable().getIdMapping();
                containerSqlTbl = sqlStmt.join(JoinType.INNER_JOIN, sqlStmt.getPrimaryTable(), valueIdMapping, containerTable, null, elementMapping, null, null, true);
                SQLStatementHelper.selectFetchPlanOfSourceClassInStatement(sqlStmt, iteratorMappingDef, fp, sqlStmt.getPrimaryTable(), elementCmd, fp.getMaxFetchDepth());
            } else {
                // Select of value in key table
                sqlStmt = new SelectStatement(storeMgr, containerTable, null, null);
                sqlStmt.setClassLoaderResolver(clr);
                containerSqlTbl = sqlStmt.getPrimaryTable();
                SQLTable elemSqlTblForValue = containerSqlTbl;
                if (elementMapping.getTable() != containerSqlTbl.getTable()) {
                    elemSqlTblForValue = sqlStmt.getTableForDatastoreContainer(elementMapping.getTable());
                    if (elemSqlTblForValue == null) {
                        // Add join to key table holding value
                        elemSqlTblForValue = sqlStmt.join(JoinType.INNER_JOIN, sqlStmt.getPrimaryTable(), sqlStmt.getPrimaryTable().getTable().getIdMapping(), elementMapping.getTable(), null, elementMapping.getTable().getIdMapping(), null, null, true);
                    }
                }
                sqlStmt.select(elemSqlTblForValue, elementMapping, null);
            }
        } else if (mapType == MapType.MAP_TYPE_KEY_IN_VALUE) {
            // Select of value in value table (allow union of possible value types)
            iteratorMappingDef = new StatementClassMapping();
            UnionStatementGenerator stmtGen = new UnionStatementGenerator(storeMgr, clr, valueCls, true, null, null);
            stmtGen.setOption(SelectStatementGenerator.OPTION_SELECT_DN_TYPE);
            iteratorMappingDef.setNucleusTypeColumnName(UnionStatementGenerator.DN_TYPE_COLUMN);
            sqlStmt = stmtGen.getStatement(ec);
            containerSqlTbl = sqlStmt.getPrimaryTable();
            SQLStatementHelper.selectFetchPlanOfSourceClassInStatement(sqlStmt, iteratorMappingDef, fp, sqlStmt.getPrimaryTable(), elementCmd, fp.getMaxFetchDepth());
        } else {
            if (elementCmd != null) {
                // TODO Allow for null value [change to select the join table and left outer join to the key]
                // Select of value table, joining to key table
                iteratorMappingDef = new StatementClassMapping();
                UnionStatementGenerator stmtGen = new UnionStatementGenerator(storeMgr, clr, valueCls, true, null, null);
                stmtGen.setOption(SelectStatementGenerator.OPTION_SELECT_DN_TYPE);
                iteratorMappingDef.setNucleusTypeColumnName(UnionStatementGenerator.DN_TYPE_COLUMN);
                sqlStmt = stmtGen.getStatement(ec);
                JavaTypeMapping valueIdMapping = sqlStmt.getPrimaryTable().getTable().getIdMapping();
                containerSqlTbl = sqlStmt.join(JoinType.INNER_JOIN, sqlStmt.getPrimaryTable(), valueIdMapping, containerTable, null, elementMapping, null, null, true);
                SQLStatementHelper.selectFetchPlanOfSourceClassInStatement(sqlStmt, iteratorMappingDef, fp, sqlStmt.getPrimaryTable(), elementCmd, fp.getMaxFetchDepth());
            } else {
                // Select of value in join table
                sqlStmt = new SelectStatement(storeMgr, containerTable, null, null);
                containerSqlTbl = sqlStmt.getPrimaryTable();
                sqlStmt.select(sqlStmt.getPrimaryTable(), elementMapping, null);
            }
        }
    }
    // Apply condition on owner field to filter by owner
    SQLExpressionFactory exprFactory = storeMgr.getSQLExpressionFactory();
    SQLTable ownerSqlTbl = SQLStatementHelper.getSQLTableForMappingOfTable(sqlStmt, containerSqlTbl, ownerMapping);
    SQLExpression ownerExpr = exprFactory.newExpression(sqlStmt, ownerSqlTbl, ownerMapping);
    SQLExpression ownerVal = exprFactory.newLiteralParameter(sqlStmt, ownerMapping, null, "OWNER");
    sqlStmt.whereAnd(ownerExpr.eq(ownerVal), true);
    // Input parameter(s) - the owner
    int inputParamNum = 1;
    StatementMappingIndex ownerIdx = new StatementMappingIndex(ownerMapping);
    if (sqlStmt.getNumberOfUnions() > 0) {
        // Add parameter occurrence for each union of statement
        for (int j = 0; j < sqlStmt.getNumberOfUnions() + 1; j++) {
            int[] paramPositions = new int[ownerMapping.getNumberOfDatastoreMappings()];
            for (int k = 0; k < ownerMapping.getNumberOfDatastoreMappings(); k++) {
                paramPositions[k] = inputParamNum++;
            }
            ownerIdx.addParameterOccurrence(paramPositions);
        }
    } else {
        int[] paramPositions = new int[ownerMapping.getNumberOfDatastoreMappings()];
        for (int k = 0; k < ownerMapping.getNumberOfDatastoreMappings(); k++) {
            paramPositions[k] = inputParamNum++;
        }
        ownerIdx.addParameterOccurrence(paramPositions);
    }
    iteratorMappingParams = new StatementParameterMapping();
    iteratorMappingParams.addMappingForParameter("owner", ownerIdx);
    return sqlStmt;
}

Example 30 with SQLTable

use of org.datanucleus.store.rdbms.sql.SQLTable in project datanucleus-rdbms by datanucleus.

the class JoinMapStore method getSQLStatementForGet.

/**
 * Method to return an SQLStatement for retrieving the value for a key.
 * Selects the join table and optionally joins to the value table if it has its own table.
 * @param ownerOP ObjectProvider for the owning object
 * @return The SQLStatement
 */
protected SelectStatement getSQLStatementForGet(ObjectProvider ownerOP) {
    SelectStatement sqlStmt = null;
    ExecutionContext ec = ownerOP.getExecutionContext();
    final ClassLoaderResolver clr = ownerOP.getExecutionContext().getClassLoaderResolver();
    Class valueCls = clr.classForName(this.valueType);
    if (valuesAreEmbedded || valuesAreSerialised) {
        // Value is stored in join table
        sqlStmt = new SelectStatement(storeMgr, mapTable, null, null);
        sqlStmt.setClassLoaderResolver(clr);
        sqlStmt.select(sqlStmt.getPrimaryTable(), valueMapping, null);
    } else {
        // Value is stored in own table
        getMappingDef = new StatementClassMapping();
        if (!valueCmd.getFullClassName().equals(valueCls.getName())) {
            valueCls = clr.classForName(valueCmd.getFullClassName());
        }
        UnionStatementGenerator stmtGen = new UnionStatementGenerator(storeMgr, clr, valueCls, true, null, null, mapTable, null, valueMapping);
        stmtGen.setOption(SelectStatementGenerator.OPTION_SELECT_DN_TYPE);
        getMappingDef.setNucleusTypeColumnName(UnionStatementGenerator.DN_TYPE_COLUMN);
        sqlStmt = stmtGen.getStatement(ec);
        // Select the value field(s)
        SQLTable valueSqlTbl = sqlStmt.getTable(valueTable, sqlStmt.getPrimaryTable().getGroupName());
        if (valueSqlTbl == null) {
            // Root value candidate has no table, so try to find a value candidate with a table that exists in this statement
            Collection<String> valueSubclassNames = storeMgr.getSubClassesForClass(valueType, true, clr);
            if (valueSubclassNames != null && !valueSubclassNames.isEmpty()) {
                for (String valueSubclassName : valueSubclassNames) {
                    DatastoreClass valueTbl = storeMgr.getDatastoreClass(valueSubclassName, clr);
                    if (valueTbl != null) {
                        valueSqlTbl = sqlStmt.getTable(valueTbl, sqlStmt.getPrimaryTable().getGroupName());
                        if (valueSqlTbl != null) {
                            break;
                        }
                    }
                }
            }
        }
        SQLStatementHelper.selectFetchPlanOfSourceClassInStatement(sqlStmt, getMappingDef, ec.getFetchPlan(), valueSqlTbl, valueCmd, ec.getFetchPlan().getMaxFetchDepth());
    }
    // Apply condition on owner field to filter by owner
    SQLExpressionFactory exprFactory = storeMgr.getSQLExpressionFactory();
    SQLTable ownerSqlTbl = SQLStatementHelper.getSQLTableForMappingOfTable(sqlStmt, sqlStmt.getPrimaryTable(), ownerMapping);
    SQLExpression ownerExpr = exprFactory.newExpression(sqlStmt, ownerSqlTbl, ownerMapping);
    SQLExpression ownerVal = exprFactory.newLiteralParameter(sqlStmt, ownerMapping, null, "OWNER");
    sqlStmt.whereAnd(ownerExpr.eq(ownerVal), true);
    // Apply condition on key
    if (keyMapping instanceof SerialisedMapping) {
        // if the keyMapping contains a BLOB column (or any other column not supported by the database
        // as primary key), uses like instead of the operator OP_EQ (=)
        // in future do not check if the keyMapping is of ObjectMapping, but use the database
        // adapter to check the data types not supported as primary key
        // if object mapping (BLOB) use like
        SQLExpression keyExpr = exprFactory.newExpression(sqlStmt, sqlStmt.getPrimaryTable(), keyMapping);
        SQLExpression keyVal = exprFactory.newLiteralParameter(sqlStmt, keyMapping, null, "KEY");
        sqlStmt.whereAnd(new org.datanucleus.store.rdbms.sql.expression.BooleanExpression(keyExpr, Expression.OP_LIKE, keyVal), true);
    } else {
        SQLExpression keyExpr = exprFactory.newExpression(sqlStmt, sqlStmt.getPrimaryTable(), keyMapping);
        SQLExpression keyVal = exprFactory.newLiteralParameter(sqlStmt, keyMapping, null, "KEY");
        sqlStmt.whereAnd(keyExpr.eq(keyVal), true);
    }
    // Input parameter(s) - owner, key
    int inputParamNum = 1;
    StatementMappingIndex ownerIdx = new StatementMappingIndex(ownerMapping);
    StatementMappingIndex keyIdx = new StatementMappingIndex(keyMapping);
    if (sqlStmt.getNumberOfUnions() > 0) {
        // Add parameter occurrence for each union of statement
        for (int j = 0; j < sqlStmt.getNumberOfUnions() + 1; j++) {
            int[] ownerPositions = new int[ownerMapping.getNumberOfDatastoreMappings()];
            for (int k = 0; k < ownerPositions.length; k++) {
                ownerPositions[k] = inputParamNum++;
            }
            ownerIdx.addParameterOccurrence(ownerPositions);
            int[] keyPositions = new int[keyMapping.getNumberOfDatastoreMappings()];
            for (int k = 0; k < keyPositions.length; k++) {
                keyPositions[k] = inputParamNum++;
            }
            keyIdx.addParameterOccurrence(keyPositions);
        }
    } else {
        int[] ownerPositions = new int[ownerMapping.getNumberOfDatastoreMappings()];
        for (int k = 0; k < ownerPositions.length; k++) {
            ownerPositions[k] = inputParamNum++;
        }
        ownerIdx.addParameterOccurrence(ownerPositions);
        int[] keyPositions = new int[keyMapping.getNumberOfDatastoreMappings()];
        for (int k = 0; k < keyPositions.length; k++) {
            keyPositions[k] = inputParamNum++;
        }
        keyIdx.addParameterOccurrence(keyPositions);
    }
    getMappingParams = new StatementParameterMapping();
    getMappingParams.addMappingForParameter("owner", ownerIdx);
    getMappingParams.addMappingForParameter("key", keyIdx);
    return sqlStmt;
}