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

Example 6 with SQLExpressionFactory

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

the class DiscriminatorStatementGenerator method getStatement.

/**
 * Accessor for the SelectStatement.
 * @param ec ExecutionContext
 * @return The SelectStatement for iterating through objects with a discriminator column
 */
public SelectStatement getStatement(ExecutionContext ec) {
    SelectStatement stmt = null;
    SQLTable discrimSqlTbl = null;
    if (joinTable == null) {
        // Select of candidate table
        stmt = new SelectStatement(parentStmt, storeMgr, candidateTable, candidateTableAlias, candidateTableGroupName);
        stmt.setClassLoaderResolver(clr);
        discrimSqlTbl = stmt.getPrimaryTable();
    } else {
        // Select of join table, with join to element table
        stmt = new SelectStatement(parentStmt, storeMgr, joinTable, joinTableAlias, candidateTableGroupName);
        stmt.setClassLoaderResolver(clr);
        JavaTypeMapping candidateIdMapping = candidateTable.getIdMapping();
        if (hasOption(OPTION_ALLOW_NULLS)) {
            // Put element table in same table group since all relates to the elements
            discrimSqlTbl = stmt.join(JoinType.LEFT_OUTER_JOIN, null, joinElementMapping, candidateTable, null, candidateIdMapping, null, stmt.getPrimaryTable().getGroupName(), true);
        } else {
            // Put element table in same table group since all relates to the elements
            discrimSqlTbl = stmt.join(JoinType.INNER_JOIN, null, joinElementMapping, candidateTable, null, candidateIdMapping, null, stmt.getPrimaryTable().getGroupName(), true);
        }
    }
    JavaTypeMapping discMapping = candidateTable.getSurrogateMapping(SurrogateColumnType.DISCRIMINATOR, true);
    if (discMapping != null) {
        // Allow for discriminator being in super-table of the candidate table
        discrimSqlTbl = SQLStatementHelper.getSQLTableForMappingOfTable(stmt, discrimSqlTbl, discMapping);
    }
    DiscriminatorMetaData dismd = discrimSqlTbl.getTable().getDiscriminatorMetaData();
    boolean hasDiscriminator = (discMapping != null && dismd != null && dismd.getStrategy() != DiscriminatorStrategy.NONE);
    // Check if we can omit the discriminator restriction
    boolean restrictDiscriminator = hasOption(OPTION_RESTRICT_DISCRIM);
    if (hasDiscriminator && restrictDiscriminator) {
        // Add the discriminator expression to restrict accepted values
        boolean multipleCandidates = false;
        BooleanExpression discExpr = null;
        if (candidates != null) {
            // Multiple candidates
            if (candidates.length > 1) {
                multipleCandidates = true;
            }
            for (int i = 0; i < candidates.length; i++) {
                if (Modifier.isAbstract(candidates[i].getModifiers())) {
                    // No point selecting this candidate since can't be instantiated
                    continue;
                }
                BooleanExpression discExprCandidate = SQLStatementHelper.getExpressionForDiscriminatorForClass(stmt, candidates[i].getName(), dismd, discMapping, discrimSqlTbl, clr);
                if (discExpr != null) {
                    discExpr = discExpr.ior(discExprCandidate);
                } else {
                    discExpr = discExprCandidate;
                }
                if (includeSubclasses) {
                    Collection<String> subclassNames = storeMgr.getSubClassesForClass(candidateType.getName(), true, clr);
                    Iterator<String> subclassIter = subclassNames.iterator();
                    if (!multipleCandidates) {
                        multipleCandidates = (subclassNames.size() > 0);
                    }
                    while (subclassIter.hasNext()) {
                        String subclassName = subclassIter.next();
                        BooleanExpression discExprSub = SQLStatementHelper.getExpressionForDiscriminatorForClass(stmt, subclassName, dismd, discMapping, discrimSqlTbl, clr);
                        discExpr = discExpr.ior(discExprSub);
                    }
                }
            }
        } else {
            // Single candidate
            if (!Modifier.isAbstract(candidateType.getModifiers())) {
                discExpr = SQLStatementHelper.getExpressionForDiscriminatorForClass(stmt, candidateType.getName(), dismd, discMapping, discrimSqlTbl, clr);
            }
            if (includeSubclasses) {
                Collection<String> subclassNames = storeMgr.getSubClassesForClass(candidateType.getName(), true, clr);
                Iterator<String> subclassIter = subclassNames.iterator();
                multipleCandidates = (subclassNames.size() > 0);
                while (subclassIter.hasNext()) {
                    String subclassName = subclassIter.next();
                    Class subclass = clr.classForName(subclassName);
                    if ((Modifier.isAbstract(subclass.getModifiers()))) {
                        continue;
                    }
                    BooleanExpression discExprCandidate = SQLStatementHelper.getExpressionForDiscriminatorForClass(stmt, subclassName, dismd, discMapping, discrimSqlTbl, clr);
                    if (discExpr == null) {
                        discExpr = discExprCandidate;
                    } else {
                        discExpr = discExpr.ior(discExprCandidate);
                    }
                }
            }
            if (discExpr == null) {
                // No possible candidates, so set expression as "1=0"
                SQLExpressionFactory exprFactory = stmt.getSQLExpressionFactory();
                JavaTypeMapping m = exprFactory.getMappingForType(boolean.class, true);
                discExpr = exprFactory.newLiteral(stmt, m, true).eq(exprFactory.newLiteral(stmt, m, false));
            }
        }
        if (discExpr != null) {
            if (hasOption(OPTION_ALLOW_NULLS)) {
                // Allow for null value of discriminator
                SQLExpression expr = stmt.getSQLExpressionFactory().newExpression(stmt, discrimSqlTbl, discMapping);
                SQLExpression val = new NullLiteral(stmt, null, null, null);
                BooleanExpression nullDiscExpr = expr.eq(val);
                discExpr = discExpr.ior(nullDiscExpr);
                if (!multipleCandidates) {
                    multipleCandidates = true;
                }
            }
            // Apply the discriminator to the query statement
            if (multipleCandidates) {
                discExpr.encloseInParentheses();
            }
            stmt.whereAnd(discExpr, true);
        }
    }
    JavaTypeMapping multitenancyMapping = candidateTable.getSurrogateMapping(SurrogateColumnType.MULTITENANCY, false);
    if (multitenancyMapping != null) {
        // Multi-tenancy restriction
        AbstractClassMetaData cmd = candidateTable.getClassMetaData();
        SQLTable tenantSqlTbl = stmt.getTable(multitenancyMapping.getTable(), discrimSqlTbl.getGroupName());
        SQLExpression tenantExpr = stmt.getSQLExpressionFactory().newExpression(stmt, tenantSqlTbl, multitenancyMapping);
        SQLExpression tenantVal = stmt.getSQLExpressionFactory().newLiteral(stmt, multitenancyMapping, ec.getNucleusContext().getMultiTenancyId(ec, cmd));
        stmt.whereAnd(tenantExpr.eq(tenantVal), true);
    }
    JavaTypeMapping softDeleteMapping = candidateTable.getSurrogateMapping(SurrogateColumnType.SOFTDELETE, false);
    if (softDeleteMapping != null && !hasOption(OPTION_INCLUDE_SOFT_DELETES)) {
        // Soft-delete restriction
        SQLTable softDeleteSqlTbl = stmt.getTable(softDeleteMapping.getTable(), discrimSqlTbl.getGroupName());
        SQLExpression softDeleteExpr = stmt.getSQLExpressionFactory().newExpression(stmt, softDeleteSqlTbl, softDeleteMapping);
        SQLExpression softDeleteVal = stmt.getSQLExpressionFactory().newLiteral(stmt, softDeleteMapping, Boolean.FALSE);
        stmt.whereAnd(softDeleteExpr.eq(softDeleteVal), true);
    }
    return stmt;
}

Example 7 with SQLExpressionFactory

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

the class MapContainsKeyMethod method getExpression.

/* (non-Javadoc)
     * @see org.datanucleus.store.rdbms.sql.method.SQLMethod#getExpression(org.datanucleus.store.rdbms.sql.expression.SQLExpression, java.util.List)
     */
public SQLExpression getExpression(SQLStatement stmt, SQLExpression expr, List<SQLExpression> args) {
    if (args == null || args.size() == 0 || args.size() > 1) {
        throw new NucleusException(Localiser.msg("060016", "containsKey", "MapExpression", 1));
    }
    MapExpression mapExpr = (MapExpression) expr;
    SQLExpression keyExpr = args.get(0);
    if (keyExpr.isParameter()) {
        // Key is a parameter so make sure its type is set
        AbstractMemberMetaData mmd = mapExpr.getJavaTypeMapping().getMemberMetaData();
        if (mmd != null && mmd.getMap() != null) {
            Class keyCls = stmt.getQueryGenerator().getClassLoaderResolver().classForName(mmd.getMap().getKeyType());
            stmt.getQueryGenerator().bindParameter(keyExpr.getParameterName(), keyCls);
        }
    }
    SQLExpressionFactory exprFactory = stmt.getSQLExpressionFactory();
    ClassLoaderResolver clr = stmt.getQueryGenerator().getClassLoaderResolver();
    if (expr instanceof MapLiteral) {
        // Literal Map
        MapLiteral lit = (MapLiteral) expr;
        Map map = (Map) lit.getValue();
        JavaTypeMapping m = exprFactory.getMappingForType(boolean.class, true);
        if (map == null || map.size() == 0) {
            return exprFactory.newLiteral(stmt, m, true).eq(exprFactory.newLiteral(stmt, m, false));
        }
        boolean useInExpression = false;
        List<SQLExpression> mapKeyExprs = lit.getKeyLiteral().getKeyExpressions();
        if (mapKeyExprs != null && !mapKeyExprs.isEmpty()) {
            // Make sure the the map key(s) are compatible with the keyExpr
            boolean incompatible = true;
            Class elemtype = clr.classForName(keyExpr.getJavaTypeMapping().getType());
            Iterator<SQLExpression> mapKeyExprIter = mapKeyExprs.iterator();
            while (mapKeyExprIter.hasNext()) {
                SQLExpression mapKeyExpr = mapKeyExprIter.next();
                Class mapKeyType = clr.classForName(mapKeyExpr.getJavaTypeMapping().getType());
                if (keyTypeCompatible(elemtype, mapKeyType)) {
                    incompatible = false;
                    break;
                }
            }
            if (incompatible) {
                // The provided element type isn't assignable to any of the input collection elements!
                return exprFactory.newLiteral(stmt, m, true).eq(exprFactory.newLiteral(stmt, m, false));
            }
            // Check if we should compare using an "IN (...)" expression
            SQLExpression mapKeyExpr = mapKeyExprs.get(0);
            if (mapKeyExpr instanceof StringExpression || mapKeyExpr instanceof NumericExpression || mapKeyExpr instanceof TemporalExpression || mapKeyExpr instanceof CharacterExpression || mapKeyExpr instanceof EnumExpression) {
                useInExpression = true;
            }
        }
        if (useInExpression) {
            // Return "key IN (val1, val2, ...)"
            SQLExpression[] exprs = (mapKeyExprs != null ? mapKeyExprs.toArray(new SQLExpression[mapKeyExprs.size()]) : null);
            return new InExpression(keyExpr, exprs);
        }
        // TODO If keyExpr is a parameter and mapExpr is derived from a parameter ?
        MapKeyLiteral mapKeyLiteral = lit.getKeyLiteral();
        BooleanExpression bExpr = null;
        List<SQLExpression> elementExprs = mapKeyLiteral.getKeyExpressions();
        for (int i = 0; i < elementExprs.size(); i++) {
            if (bExpr == null) {
                bExpr = (elementExprs.get(i)).eq(keyExpr);
            } else {
                bExpr = bExpr.ior((elementExprs.get(i)).eq(keyExpr));
            }
        }
        if (bExpr != null) {
            bExpr.encloseInParentheses();
        }
        return bExpr;
    }
    if (stmt.getQueryGenerator().getCompilationComponent() == CompilationComponent.FILTER) {
        boolean useSubquery = getNeedsSubquery(stmt);
        JoinType joinType = JoinType.INNER_JOIN;
        if (keyExpr instanceof UnboundExpression) {
            // See if the user has defined what should be used
            String varName = ((UnboundExpression) keyExpr).getVariableName();
            String extensionName = "datanucleus.query.jdoql." + varName + ".join";
            String extensionValue = (String) stmt.getQueryGenerator().getValueForExtension(extensionName);
            if (extensionValue != null) {
                if (extensionValue.equalsIgnoreCase("SUBQUERY")) {
                    useSubquery = true;
                } else if (extensionValue.equalsIgnoreCase("INNERJOIN")) {
                    useSubquery = false;
                } else if (extensionValue.equalsIgnoreCase("LEFTOUTERJOIN")) {
                    joinType = JoinType.LEFT_OUTER_JOIN;
                }
            }
        }
        // TODO Check if *this* "containsKey" is negated, not any of them (and remove above check)
        if (useSubquery) {
            return containsAsSubquery(stmt, mapExpr, keyExpr);
        }
        return containsAsJoin(stmt, mapExpr, keyExpr, joinType);
    }
    return containsAsSubquery(stmt, mapExpr, keyExpr);
}

Example 8 with SQLExpressionFactory

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

the class MapContainsKeyMethod method containsAsSubquery.

/**
 * Method to return an expression for Map.containsKey using a subquery "EXISTS".
 * This is for use when there are "!contains" or "OR" operations in the filter.
 * Creates the following SQL,
 * <ul>
 * <li><b>Map using join table</b>
 * <pre>
 * SELECT 1 FROM JOIN_TBL A0_SUB
 * WHERE A0_SUB.JOIN_OWN_ID = A0.ID AND A0_SUB.JOIN_KEY_ID = {keyExpr}
 * </pre>
 * </li>
 * <li><b>Map with key stored in value</b>
 * <pre>
 * SELECT 1 FROM KEY_TABLE A0_SUB INNER JOIN VALUE_TBL B0 ON ...
 * WHERE B0.JOIN_OWN_ID = A0.ID AND A0_SUB.ID = {keyExpr}
 * </pre>
 * </li>
 * <li><b>Map of value stored in key</b>
 * <pre>
 * SELECT 1 FROM KEY_TABLE A0_SUB
 * WHERE A0_SUB.OWN_ID = A0.ID AND A0_SUB.ID = {keyExpr}
 * </pre>
 * </li>
 * </ul>
 * and returns a BooleanSubqueryExpression ("EXISTS (subquery)")
 * @param stmt SQLStatement
 * @param mapExpr Map expression
 * @param keyExpr Expression for the key
 * @return Contains expression
 */
protected SQLExpression containsAsSubquery(SQLStatement stmt, MapExpression mapExpr, SQLExpression keyExpr) {
    boolean keyIsUnbound = (keyExpr instanceof UnboundExpression);
    String varName = null;
    if (keyIsUnbound) {
        varName = ((UnboundExpression) keyExpr).getVariableName();
        NucleusLogger.QUERY.debug("map.containsKey binding unbound variable " + varName + " using SUBQUERY");
    // TODO What if the variable is declared as a subtype, handle this see CollectionContainsMethod
    }
    RDBMSStoreManager storeMgr = stmt.getRDBMSManager();
    SQLExpressionFactory exprFactory = stmt.getSQLExpressionFactory();
    ClassLoaderResolver clr = stmt.getQueryGenerator().getClassLoaderResolver();
    AbstractMemberMetaData mmd = mapExpr.getJavaTypeMapping().getMemberMetaData();
    AbstractClassMetaData keyCmd = mmd.getMap().getKeyClassMetaData(clr);
    MapTable joinTbl = (MapTable) storeMgr.getTable(mmd);
    SelectStatement subStmt = null;
    if (mmd.getMap().getMapType() == MapType.MAP_TYPE_JOIN) {
        // JoinTable Map
        if (keyCmd == null) {
            // Map<Non-PC, ?>
            subStmt = new SelectStatement(stmt, storeMgr, joinTbl, null, null);
            subStmt.setClassLoaderResolver(clr);
            JavaTypeMapping oneMapping = storeMgr.getMappingManager().getMapping(Integer.class);
            subStmt.select(exprFactory.newLiteral(subStmt, oneMapping, 1), null);
            // Restrict to map owner
            JavaTypeMapping ownerMapping = ((JoinTable) joinTbl).getOwnerMapping();
            SQLExpression ownerExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), ownerMapping);
            SQLExpression ownerIdExpr = exprFactory.newExpression(stmt, mapExpr.getSQLTable(), mapExpr.getSQLTable().getTable().getIdMapping());
            subStmt.whereAnd(ownerExpr.eq(ownerIdExpr), true);
            if (keyIsUnbound) {
                // Bind the variable in the QueryGenerator
                keyExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), joinTbl.getKeyMapping());
                stmt.getQueryGenerator().bindVariable(varName, null, keyExpr.getSQLTable(), keyExpr.getJavaTypeMapping());
            } else {
                // Add restrict to key
                SQLExpression elemIdExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), joinTbl.getKeyMapping());
                subStmt.whereAnd(elemIdExpr.eq(keyExpr), true);
            }
        } else {
            // Map<PC, ?>
            DatastoreClass keyTbl = storeMgr.getDatastoreClass(mmd.getMap().getKeyType(), clr);
            subStmt = new SelectStatement(stmt, storeMgr, keyTbl, null, null);
            subStmt.setClassLoaderResolver(clr);
            JavaTypeMapping oneMapping = storeMgr.getMappingManager().getMapping(Integer.class);
            subStmt.select(exprFactory.newLiteral(subStmt, oneMapping, 1), null);
            // Join to join table
            SQLTable joinSqlTbl = subStmt.join(JoinType.INNER_JOIN, subStmt.getPrimaryTable(), keyTbl.getIdMapping(), joinTbl, null, joinTbl.getKeyMapping(), null, null, true);
            // Restrict to map owner
            JavaTypeMapping ownerMapping = joinTbl.getOwnerMapping();
            SQLExpression ownerExpr = exprFactory.newExpression(subStmt, joinSqlTbl, ownerMapping);
            SQLExpression ownerIdExpr = exprFactory.newExpression(stmt, mapExpr.getSQLTable(), mapExpr.getSQLTable().getTable().getIdMapping());
            subStmt.whereAnd(ownerExpr.eq(ownerIdExpr), true);
            if (keyIsUnbound) {
                // Bind the variable in the QueryGenerator
                keyExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), keyTbl.getIdMapping());
                stmt.getQueryGenerator().bindVariable(varName, keyCmd, keyExpr.getSQLTable(), keyExpr.getJavaTypeMapping());
            } else {
                // Add restrict to key
                SQLExpression keyIdExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), keyTbl.getIdMapping());
                subStmt.whereAnd(keyIdExpr.eq(keyExpr), true);
            }
        }
    } else if (mmd.getMap().getMapType() == MapType.MAP_TYPE_KEY_IN_VALUE) {
        // Key stored in value table
        AbstractClassMetaData valCmd = mmd.getMap().getValueClassMetaData(clr);
        DatastoreClass valTbl = storeMgr.getDatastoreClass(mmd.getMap().getValueType(), clr);
        JavaTypeMapping ownerMapping = null;
        if (mmd.getMappedBy() != null) {
            ownerMapping = valTbl.getMemberMapping(valCmd.getMetaDataForMember(mmd.getMappedBy()));
        } else {
            ownerMapping = valTbl.getExternalMapping(mmd, MappingType.EXTERNAL_FK);
        }
        AbstractMemberMetaData valKeyMmd = valCmd.getMetaDataForMember(mmd.getKeyMetaData().getMappedBy());
        if (keyCmd == null) {
            subStmt = new SelectStatement(stmt, storeMgr, valTbl, null, null);
            subStmt.setClassLoaderResolver(clr);
            JavaTypeMapping oneMapping = storeMgr.getMappingManager().getMapping(Integer.class);
            subStmt.select(exprFactory.newLiteral(subStmt, oneMapping, 1), null);
            // Restrict to map owner (on value table)
            SQLExpression ownerExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), ownerMapping);
            SQLExpression ownerIdExpr = exprFactory.newExpression(stmt, mapExpr.getSQLTable(), mapExpr.getSQLTable().getTable().getIdMapping());
            subStmt.whereAnd(ownerExpr.eq(ownerIdExpr), true);
            if (keyIsUnbound) {
                // Bind the variable in the QueryGenerator
                keyExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), valTbl.getMemberMapping(valKeyMmd));
                stmt.getQueryGenerator().bindVariable(varName, null, keyExpr.getSQLTable(), keyExpr.getJavaTypeMapping());
            } else {
                // Add restrict to key
                JavaTypeMapping keyMapping = valTbl.getMemberMapping(valKeyMmd);
                SQLExpression elemIdExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), keyMapping);
                subStmt.whereAnd(elemIdExpr.eq(keyExpr), true);
            }
        } else {
            DatastoreClass keyTbl = storeMgr.getDatastoreClass(mmd.getMap().getKeyType(), clr);
            subStmt = new SelectStatement(stmt, storeMgr, keyTbl, null, null);
            subStmt.setClassLoaderResolver(clr);
            JavaTypeMapping oneMapping = storeMgr.getMappingManager().getMapping(Integer.class);
            subStmt.select(exprFactory.newLiteral(subStmt, oneMapping, 1), null);
            // Join to value table
            SQLTable valSqlTbl = subStmt.join(JoinType.INNER_JOIN, subStmt.getPrimaryTable(), keyTbl.getIdMapping(), valTbl, null, valTbl.getMemberMapping(valKeyMmd), null, null, true);
            // Restrict to map owner (on value table)
            SQLExpression ownerExpr = exprFactory.newExpression(subStmt, valSqlTbl, ownerMapping);
            SQLExpression ownerIdExpr = exprFactory.newExpression(stmt, mapExpr.getSQLTable(), mapExpr.getSQLTable().getTable().getIdMapping());
            subStmt.whereAnd(ownerExpr.eq(ownerIdExpr), true);
            if (keyIsUnbound) {
                // Bind the variable in the QueryGenerator
                keyExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), keyTbl.getIdMapping());
                stmt.getQueryGenerator().bindVariable(varName, keyCmd, keyExpr.getSQLTable(), keyExpr.getJavaTypeMapping());
            } else {
                // Add restrict to key
                SQLExpression keyIdExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), keyTbl.getIdMapping());
                subStmt.whereAnd(keyIdExpr.eq(keyExpr), true);
            }
        }
    } else if (mmd.getMap().getMapType() == MapType.MAP_TYPE_VALUE_IN_KEY) {
        DatastoreClass keyTbl = storeMgr.getDatastoreClass(mmd.getMap().getKeyType(), clr);
        JavaTypeMapping ownerMapping = null;
        if (mmd.getMappedBy() != null) {
            ownerMapping = keyTbl.getMemberMapping(keyCmd.getMetaDataForMember(mmd.getMappedBy()));
        } else {
            ownerMapping = keyTbl.getExternalMapping(mmd, MappingType.EXTERNAL_FK);
        }
        subStmt = new SelectStatement(stmt, storeMgr, keyTbl, null, null);
        subStmt.setClassLoaderResolver(clr);
        JavaTypeMapping oneMapping = storeMgr.getMappingManager().getMapping(Integer.class);
        subStmt.select(exprFactory.newLiteral(subStmt, oneMapping, 1), null);
        // Restrict to map owner (on key table)
        SQLExpression ownerExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), ownerMapping);
        SQLExpression ownerIdExpr = exprFactory.newExpression(stmt, mapExpr.getSQLTable(), mapExpr.getSQLTable().getTable().getIdMapping());
        subStmt.whereAnd(ownerExpr.eq(ownerIdExpr), true);
        if (keyIsUnbound) {
            // Bind the variable in the QueryGenerator
            keyExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), keyTbl.getIdMapping());
            stmt.getQueryGenerator().bindVariable(varName, keyCmd, keyExpr.getSQLTable(), keyExpr.getJavaTypeMapping());
        } else {
            // Add restrict to key
            JavaTypeMapping keyMapping = keyTbl.getIdMapping();
            SQLExpression keyIdExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), keyMapping);
            subStmt.whereAnd(keyIdExpr.eq(keyExpr), true);
        }
    }
    return new BooleanSubqueryExpression(stmt, "EXISTS", subStmt);
}

Example 9 with SQLExpressionFactory

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

the class MapContainsValueMethod method containsAsSubquery.

/**
 * Method to return an expression for Map.containsValue using a subquery "EXISTS".
 * This is for use when there are "!contains" or "OR" operations in the filter.
 * Creates the following SQL,
 * <ul>
 * <li><b>Map using join table</b>
 * <pre>
 * SELECT 1 FROM JOIN_TBL A0_SUB
 * WHERE A0_SUB.JOIN_OWN_ID = A0.ID AND A0_SUB.JOIN_VAL_ID = {valExpr}
 * </pre>
 * </li>
 * <li><b>Map with key stored in value</b>
 * <pre>
 * SELECT 1 FROM VAL_TABLE A0_SUB INNER JOIN KEY_TBL B0 ON ...
 * WHERE B0.JOIN_OWN_ID = A0.ID AND A0_SUB.ID = {valExpr}
 * </pre>
 * </li>
 * <li><b>Map of value stored in key</b>
 * <pre>
 * SELECT 1 FROM VAL_TABLE A0_SUB
 * WHERE A0_SUB.OWN_ID = A0.ID AND A0_SUB.ID = {valExpr}
 * </pre>
 * </li>
 * </ul>
 * and returns a BooleanSubqueryExpression ("EXISTS (subquery)")
 * @param stmt SQLStatement
 * @param mapExpr Map expression
 * @param valExpr Expression for the value
 * @return Contains expression
 */
protected SQLExpression containsAsSubquery(SQLStatement stmt, MapExpression mapExpr, SQLExpression valExpr) {
    boolean valIsUnbound = (valExpr instanceof UnboundExpression);
    String varName = null;
    if (valIsUnbound) {
        varName = ((UnboundExpression) valExpr).getVariableName();
        NucleusLogger.QUERY.debug("map.containsValue binding unbound variable " + varName + " using SUBQUERY");
    // TODO What if the variable is declared as a subtype, handle this see CollectionContainsMethod
    }
    RDBMSStoreManager storeMgr = stmt.getRDBMSManager();
    SQLExpressionFactory exprFactory = stmt.getSQLExpressionFactory();
    ClassLoaderResolver clr = stmt.getQueryGenerator().getClassLoaderResolver();
    AbstractMemberMetaData mmd = mapExpr.getJavaTypeMapping().getMemberMetaData();
    AbstractClassMetaData valCmd = mmd.getMap().getValueClassMetaData(clr);
    MapTable joinTbl = (MapTable) storeMgr.getTable(mmd);
    SelectStatement subStmt = null;
    if (mmd.getMap().getMapType() == MapType.MAP_TYPE_JOIN) {
        // JoinTable Map
        if (valCmd == null) {
            // Map<?, Non-PC>
            subStmt = new SelectStatement(stmt, storeMgr, joinTbl, null, null);
            subStmt.setClassLoaderResolver(clr);
            JavaTypeMapping oneMapping = storeMgr.getMappingManager().getMapping(Integer.class);
            subStmt.select(exprFactory.newLiteral(subStmt, oneMapping, 1), null);
            // Restrict to map owner
            JavaTypeMapping ownerMapping = ((JoinTable) joinTbl).getOwnerMapping();
            SQLExpression ownerExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), ownerMapping);
            SQLExpression ownerIdExpr = exprFactory.newExpression(stmt, mapExpr.getSQLTable(), mapExpr.getSQLTable().getTable().getIdMapping());
            subStmt.whereAnd(ownerExpr.eq(ownerIdExpr), true);
            if (valIsUnbound) {
                // Bind the variable in the QueryGenerator
                valExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), joinTbl.getValueMapping());
                stmt.getQueryGenerator().bindVariable(varName, null, valExpr.getSQLTable(), valExpr.getJavaTypeMapping());
            } else {
                // Add restrict to value
                SQLExpression valIdExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), joinTbl.getValueMapping());
                subStmt.whereAnd(valIdExpr.eq(valExpr), true);
            }
        } else {
            // Map<?, PC>
            DatastoreClass valTbl = storeMgr.getDatastoreClass(mmd.getMap().getValueType(), clr);
            subStmt = new SelectStatement(stmt, storeMgr, valTbl, null, null);
            subStmt.setClassLoaderResolver(clr);
            JavaTypeMapping oneMapping = storeMgr.getMappingManager().getMapping(Integer.class);
            subStmt.select(exprFactory.newLiteral(subStmt, oneMapping, 1), null);
            // Join to join table
            SQLTable joinSqlTbl = subStmt.join(JoinType.INNER_JOIN, subStmt.getPrimaryTable(), valTbl.getIdMapping(), joinTbl, null, joinTbl.getValueMapping(), null, null, true);
            // Restrict to map owner
            JavaTypeMapping ownerMapping = joinTbl.getOwnerMapping();
            SQLExpression ownerExpr = exprFactory.newExpression(subStmt, joinSqlTbl, ownerMapping);
            SQLExpression ownerIdExpr = exprFactory.newExpression(stmt, mapExpr.getSQLTable(), mapExpr.getSQLTable().getTable().getIdMapping());
            subStmt.whereAnd(ownerExpr.eq(ownerIdExpr), true);
            if (valIsUnbound) {
                // Bind the variable in the QueryGenerator
                valExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), valTbl.getIdMapping());
                stmt.getQueryGenerator().bindVariable(varName, valCmd, valExpr.getSQLTable(), valExpr.getJavaTypeMapping());
            } else {
                // Add restrict to value
                SQLExpression valIdExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), valTbl.getIdMapping());
                subStmt.whereAnd(valIdExpr.eq(valExpr), true);
            }
        }
    } else if (mmd.getMap().getMapType() == MapType.MAP_TYPE_KEY_IN_VALUE) {
        // Key stored in value table
        DatastoreClass valTbl = storeMgr.getDatastoreClass(mmd.getMap().getValueType(), clr);
        JavaTypeMapping ownerMapping = null;
        if (mmd.getMappedBy() != null) {
            ownerMapping = valTbl.getMemberMapping(valCmd.getMetaDataForMember(mmd.getMappedBy()));
        } else {
            ownerMapping = valTbl.getExternalMapping(mmd, MappingType.EXTERNAL_FK);
        }
        subStmt = new SelectStatement(stmt, storeMgr, valTbl, null, null);
        subStmt.setClassLoaderResolver(clr);
        JavaTypeMapping oneMapping = storeMgr.getMappingManager().getMapping(Integer.class);
        subStmt.select(exprFactory.newLiteral(subStmt, oneMapping, 1), null);
        // Restrict to map owner (on value table)
        SQLExpression ownerExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), ownerMapping);
        SQLExpression ownerIdExpr = exprFactory.newExpression(stmt, mapExpr.getSQLTable(), mapExpr.getSQLTable().getTable().getIdMapping());
        subStmt.whereAnd(ownerExpr.eq(ownerIdExpr), true);
        if (valIsUnbound) {
            // Bind the variable in the QueryGenerator
            valExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), valTbl.getIdMapping());
            stmt.getQueryGenerator().bindVariable(varName, valCmd, valExpr.getSQLTable(), valExpr.getJavaTypeMapping());
        } else {
            // Add restrict to value
            JavaTypeMapping valMapping = valTbl.getIdMapping();
            SQLExpression valIdExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), valMapping);
            subStmt.whereAnd(valIdExpr.eq(valExpr), true);
        }
    } else if (mmd.getMap().getMapType() == MapType.MAP_TYPE_VALUE_IN_KEY) {
        AbstractClassMetaData keyCmd = mmd.getMap().getKeyClassMetaData(clr);
        DatastoreClass keyTbl = storeMgr.getDatastoreClass(mmd.getMap().getKeyType(), clr);
        JavaTypeMapping ownerMapping = null;
        if (mmd.getMappedBy() != null) {
            ownerMapping = keyTbl.getMemberMapping(keyCmd.getMetaDataForMember(mmd.getMappedBy()));
        } else {
            ownerMapping = keyTbl.getExternalMapping(mmd, MappingType.EXTERNAL_FK);
        }
        AbstractMemberMetaData keyValMmd = keyCmd.getMetaDataForMember(mmd.getValueMetaData().getMappedBy());
        if (valCmd == null) {
            subStmt = new SelectStatement(stmt, storeMgr, keyTbl, null, null);
            subStmt.setClassLoaderResolver(clr);
            JavaTypeMapping oneMapping = storeMgr.getMappingManager().getMapping(Integer.class);
            subStmt.select(exprFactory.newLiteral(subStmt, oneMapping, 1), null);
            // Restrict to map owner (on key table)
            SQLExpression ownerExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), ownerMapping);
            SQLExpression ownerIdExpr = exprFactory.newExpression(stmt, mapExpr.getSQLTable(), mapExpr.getSQLTable().getTable().getIdMapping());
            subStmt.whereAnd(ownerExpr.eq(ownerIdExpr), true);
            if (valIsUnbound) {
                // Bind the variable in the QueryGenerator
                valExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), keyTbl.getMemberMapping(keyValMmd));
                stmt.getQueryGenerator().bindVariable(varName, null, valExpr.getSQLTable(), valExpr.getJavaTypeMapping());
            } else {
                // Add restrict to value
                JavaTypeMapping valMapping = keyTbl.getMemberMapping(keyValMmd);
                SQLExpression valIdExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), valMapping);
                subStmt.whereAnd(valIdExpr.eq(valExpr), true);
            }
        } else {
            DatastoreClass valTbl = storeMgr.getDatastoreClass(mmd.getMap().getValueType(), clr);
            subStmt = new SelectStatement(stmt, storeMgr, valTbl, null, null);
            subStmt.setClassLoaderResolver(clr);
            JavaTypeMapping oneMapping = storeMgr.getMappingManager().getMapping(Integer.class);
            subStmt.select(exprFactory.newLiteral(subStmt, oneMapping, 1), null);
            // Join to key table
            SQLTable keySqlTbl = subStmt.join(JoinType.INNER_JOIN, subStmt.getPrimaryTable(), valTbl.getIdMapping(), keyTbl, null, keyTbl.getMemberMapping(keyValMmd), null, null, true);
            // Restrict to map owner (on key table)
            SQLExpression ownerExpr = exprFactory.newExpression(subStmt, keySqlTbl, ownerMapping);
            SQLExpression ownerIdExpr = exprFactory.newExpression(stmt, mapExpr.getSQLTable(), mapExpr.getSQLTable().getTable().getIdMapping());
            subStmt.whereAnd(ownerExpr.eq(ownerIdExpr), true);
            if (valIsUnbound) {
                // Bind the variable in the QueryGenerator
                valExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), valTbl.getIdMapping());
                stmt.getQueryGenerator().bindVariable(varName, valCmd, valExpr.getSQLTable(), valExpr.getJavaTypeMapping());
            } else {
                // Add restrict to value
                SQLExpression valIdExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), valTbl.getIdMapping());
                subStmt.whereAnd(valIdExpr.eq(valExpr), true);
            }
        }
    }
    return new BooleanSubqueryExpression(stmt, "EXISTS", subStmt);
}

Example 10 with SQLExpressionFactory

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

the class MapContainsValueMethod method containsAsJoin.

/**
 * Method to return an expression for Map.containsValue using INNER JOIN to the element.
 * This is only for use when there are no "!containsValue" and no "OR" operations.
 * Creates SQL by adding INNER JOIN to the join table (where it exists), and also to the value table
 * adding an AND condition on the value (with value of the valueExpr).
 * Returns a BooleanExpression "TRUE" (since the INNER JOIN will guarantee if the value is contained of not).
 * @param stmt SQLStatement
 * @param mapExpr Map expression
 * @param valExpr Expression for the value
 * @param joinType Type of join
 * @return Contains expression
 */
protected SQLExpression containsAsJoin(SQLStatement stmt, MapExpression mapExpr, SQLExpression valExpr, JoinType joinType) {
    boolean valIsUnbound = (valExpr instanceof UnboundExpression);
    String varName = null;
    String valAlias = null;
    if (valIsUnbound) {
        varName = ((UnboundExpression) valExpr).getVariableName();
        NucleusLogger.QUERY.debug("map.containsValue(" + valExpr + ") binding unbound variable " + varName + " using INNER JOIN");
    // TODO What if the variable is declared as a subtype, handle this see CollectionContainsMethod
    } else if (!stmt.getQueryGenerator().hasExplicitJoins()) {
        if (stmt.getJoinTypeForTable(valExpr.getSQLTable()) == JoinType.CROSS_JOIN) {
            // Value is currently joined via CROSS JOIN, so remove it (and use INNER JOIN below)
            valAlias = stmt.removeCrossJoin(valExpr.getSQLTable());
            valIsUnbound = true;
            NucleusLogger.QUERY.debug("map.containsValue(" + valExpr + ") was previously bound as CROSS JOIN but changing to INNER JOIN");
        }
    // TODO If owner is joined via CROSS JOIN and value is already present then remove CROSS JOIN
    // and join via INNER JOIN
    }
    RDBMSStoreManager storeMgr = stmt.getRDBMSManager();
    SQLExpressionFactory exprFactory = stmt.getSQLExpressionFactory();
    ClassLoaderResolver clr = stmt.getQueryGenerator().getClassLoaderResolver();
    AbstractMemberMetaData mmd = mapExpr.getJavaTypeMapping().getMemberMetaData();
    AbstractClassMetaData valCmd = mmd.getMap().getValueClassMetaData(clr);
    if (mmd.getMap().getMapType() == MapType.MAP_TYPE_JOIN) {
        // Map formed in join table - add join to join table, then to value table (if present)
        MapTable mapTbl = (MapTable) storeMgr.getTable(mmd);
        SQLTable joinSqlTbl = stmt.join(joinType, mapExpr.getSQLTable(), mapExpr.getSQLTable().getTable().getIdMapping(), mapTbl, null, mapTbl.getOwnerMapping(), null, null);
        if (valCmd != null) {
            if (valIsUnbound) {
                DatastoreClass valTbl = storeMgr.getDatastoreClass(valCmd.getFullClassName(), clr);
                SQLTable valSqlTbl = stmt.join(joinType, joinSqlTbl, mapTbl.getValueMapping(), valTbl, valAlias, valTbl.getIdMapping(), null, null);
                // Bind the variable in the QueryGenerator
                valExpr = exprFactory.newExpression(stmt, valSqlTbl, valSqlTbl.getTable().getIdMapping());
                stmt.getQueryGenerator().bindVariable(varName, valCmd, valExpr.getSQLTable(), valExpr.getJavaTypeMapping());
            } else {
                // Add restrict to value
                SQLExpression valIdExpr = exprFactory.newExpression(stmt, joinSqlTbl, mapTbl.getValueMapping());
                stmt.whereAnd(valIdExpr.eq(valExpr), true);
            }
        } else {
            if (valIsUnbound) {
                // Bind the variable in the QueryGenerator
                valExpr = exprFactory.newExpression(stmt, joinSqlTbl, mapTbl.getValueMapping());
                stmt.getQueryGenerator().bindVariable(varName, null, valExpr.getSQLTable(), valExpr.getJavaTypeMapping());
            } else {
                // Add restrict to value
                SQLExpression valIdExpr = exprFactory.newExpression(stmt, joinSqlTbl, mapTbl.getValueMapping());
                stmt.whereAnd(valIdExpr.eq(valExpr), true);
            }
        }
    } else if (mmd.getMap().getMapType() == MapType.MAP_TYPE_KEY_IN_VALUE) {
        // Map formed in value table - add join to value table
        DatastoreClass valTbl = storeMgr.getDatastoreClass(valCmd.getFullClassName(), clr);
        JavaTypeMapping ownerMapping = null;
        if (mmd.getMappedBy() != null) {
            ownerMapping = valTbl.getMemberMapping(valCmd.getMetaDataForMember(mmd.getMappedBy()));
        } else {
            ownerMapping = valTbl.getExternalMapping(mmd, MappingType.EXTERNAL_FK);
        }
        SQLTable valSqlTbl = stmt.join(joinType, mapExpr.getSQLTable(), mapExpr.getSQLTable().getTable().getIdMapping(), valTbl, valAlias, ownerMapping, null, null);
        if (valIsUnbound) {
            // Bind the variable in the QueryGenerator
            valExpr = exprFactory.newExpression(stmt, valSqlTbl, valTbl.getIdMapping());
            stmt.getQueryGenerator().bindVariable(varName, valCmd, valExpr.getSQLTable(), valExpr.getJavaTypeMapping());
        } else {
            // Add restrict to value
            SQLExpression valIdExpr = exprFactory.newExpression(stmt, valSqlTbl, valTbl.getIdMapping());
            stmt.whereAnd(valIdExpr.eq(valExpr), true);
        }
    } else if (mmd.getMap().getMapType() == MapType.MAP_TYPE_VALUE_IN_KEY) {
        // Map formed in key table - add join to key table then to value table
        AbstractClassMetaData keyCmd = mmd.getMap().getKeyClassMetaData(clr);
        DatastoreClass keyTbl = storeMgr.getDatastoreClass(keyCmd.getFullClassName(), clr);
        AbstractMemberMetaData keyValMmd = keyCmd.getMetaDataForMember(mmd.getValueMetaData().getMappedBy());
        JavaTypeMapping ownerMapping = null;
        if (mmd.getMappedBy() != null) {
            ownerMapping = keyTbl.getMemberMapping(keyCmd.getMetaDataForMember(mmd.getMappedBy()));
        } else {
            ownerMapping = keyTbl.getExternalMapping(mmd, MappingType.EXTERNAL_FK);
        }
        SQLTable keySqlTbl = stmt.join(joinType, mapExpr.getSQLTable(), mapExpr.getSQLTable().getTable().getIdMapping(), keyTbl, null, ownerMapping, null, null);
        if (valCmd != null) {
            DatastoreClass valTbl = storeMgr.getDatastoreClass(valCmd.getFullClassName(), clr);
            SQLTable valSqlTbl = stmt.join(joinType, keySqlTbl, keyTbl.getMemberMapping(keyValMmd), valTbl, valAlias, valTbl.getIdMapping(), null, null);
            if (valIsUnbound) {
                // Bind the variable in the QueryGenerator
                valExpr = exprFactory.newExpression(stmt, valSqlTbl, valTbl.getIdMapping());
                stmt.getQueryGenerator().bindVariable(varName, valCmd, valExpr.getSQLTable(), valExpr.getJavaTypeMapping());
            } else {
                // Add restrict to value
                SQLExpression valIdExpr = exprFactory.newExpression(stmt, valSqlTbl, valTbl.getIdMapping());
                stmt.whereAnd(valIdExpr.eq(valExpr), true);
            }
        } else {
            if (valIsUnbound) {
                // Bind the variable in the QueryGenerator
                valExpr = exprFactory.newExpression(stmt, keySqlTbl, keyTbl.getMemberMapping(keyValMmd));
                stmt.getQueryGenerator().bindVariable(varName, null, valExpr.getSQLTable(), valExpr.getJavaTypeMapping());
            } else {
                // Add restrict to value
                SQLExpression valIdExpr = exprFactory.newExpression(stmt, keySqlTbl, keyTbl.getMemberMapping(keyValMmd));
                stmt.whereAnd(valIdExpr.eq(valExpr), true);
            }
        }
    }
    JavaTypeMapping m = exprFactory.getMappingForType(boolean.class, true);
    return exprFactory.newLiteral(stmt, m, true).eq(exprFactory.newLiteral(stmt, m, true));
}