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

Example 1 with SQLExpression

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

the class OracleClobRDBMSMapping method updateClobColumn.

/**
 * Convenience method to update the contents of a CLOB column.
 * Oracle requires that a CLOB is initialised with EMPTY_CLOB() and then you retrieve
 * the column and update its CLOB value. Performs a statement
 * <pre>
 * SELECT {clobColumn} FROM TABLE WHERE ID=? FOR UPDATE
 * </pre>
 * and then updates the Clob value returned.
 * @param op ObjectProvider of the object
 * @param table Table storing the CLOB column
 * @param mapping Datastore mapping for the CLOB column
 * @param value The value to store in the CLOB
 * @throws NucleusObjectNotFoundException Thrown if an object is not found
 * @throws NucleusDataStoreException Thrown if an error occurs in datastore communication
 */
@SuppressWarnings("deprecation")
public static void updateClobColumn(ObjectProvider op, Table table, DatastoreMapping mapping, String value) {
    ExecutionContext ec = op.getExecutionContext();
    RDBMSStoreManager storeMgr = table.getStoreManager();
    // Don't support join tables yet
    DatastoreClass classTable = (DatastoreClass) table;
    SQLExpressionFactory exprFactory = storeMgr.getSQLExpressionFactory();
    // Generate "SELECT {clobColumn} FROM TABLE WHERE ID=? FOR UPDATE" statement
    SelectStatement sqlStmt = new SelectStatement(storeMgr, table, null, null);
    sqlStmt.setClassLoaderResolver(ec.getClassLoaderResolver());
    sqlStmt.addExtension(SQLStatement.EXTENSION_LOCK_FOR_UPDATE, true);
    SQLTable blobSqlTbl = SQLStatementHelper.getSQLTableForMappingOfTable(sqlStmt, sqlStmt.getPrimaryTable(), mapping.getJavaTypeMapping());
    sqlStmt.select(blobSqlTbl, mapping.getColumn(), null);
    StatementClassMapping mappingDefinition = new StatementClassMapping();
    AbstractClassMetaData cmd = op.getClassMetaData();
    int inputParamNum = 1;
    if (cmd.getIdentityType() == IdentityType.DATASTORE) {
        // Datastore identity value for input
        JavaTypeMapping datastoreIdMapping = classTable.getSurrogateMapping(SurrogateColumnType.DATASTORE_ID, false);
        SQLExpression expr = exprFactory.newExpression(sqlStmt, sqlStmt.getPrimaryTable(), datastoreIdMapping);
        SQLExpression val = exprFactory.newLiteralParameter(sqlStmt, datastoreIdMapping, null, "ID");
        sqlStmt.whereAnd(expr.eq(val), true);
        StatementMappingIndex datastoreIdx = mappingDefinition.getMappingForMemberPosition(SurrogateColumnType.DATASTORE_ID.getFieldNumber());
        if (datastoreIdx == null) {
            datastoreIdx = new StatementMappingIndex(datastoreIdMapping);
            mappingDefinition.addMappingForMember(SurrogateColumnType.DATASTORE_ID.getFieldNumber(), datastoreIdx);
        }
        datastoreIdx.addParameterOccurrence(new int[] { inputParamNum });
    } else if (cmd.getIdentityType() == IdentityType.APPLICATION) {
        // Application identity value(s) for input
        int[] pkNums = cmd.getPKMemberPositions();
        for (int i = 0; i < pkNums.length; i++) {
            AbstractMemberMetaData mmd = cmd.getMetaDataForManagedMemberAtAbsolutePosition(pkNums[i]);
            JavaTypeMapping pkMapping = classTable.getMemberMapping(mmd);
            SQLExpression expr = exprFactory.newExpression(sqlStmt, sqlStmt.getPrimaryTable(), pkMapping);
            SQLExpression val = exprFactory.newLiteralParameter(sqlStmt, pkMapping, null, "PK" + i);
            sqlStmt.whereAnd(expr.eq(val), true);
            StatementMappingIndex pkIdx = mappingDefinition.getMappingForMemberPosition(pkNums[i]);
            if (pkIdx == null) {
                pkIdx = new StatementMappingIndex(pkMapping);
                mappingDefinition.addMappingForMember(pkNums[i], pkIdx);
            }
            int[] inputParams = new int[pkMapping.getNumberOfDatastoreMappings()];
            for (int j = 0; j < pkMapping.getNumberOfDatastoreMappings(); j++) {
                inputParams[j] = inputParamNum++;
            }
            pkIdx.addParameterOccurrence(inputParams);
        }
    }
    String textStmt = sqlStmt.getSQLText().toSQL();
    if (op.isEmbedded()) {
        // This mapping is embedded, so navigate back to the real owner since that is the "id" in the table
        ObjectProvider[] embeddedOwners = ec.getOwnersForEmbeddedObjectProvider(op);
        if (embeddedOwners != null) {
            // Just use the first owner
            // TODO Should check if the owner is stored in this table
            op = embeddedOwners[0];
        }
    }
    try {
        ManagedConnection mconn = storeMgr.getConnectionManager().getConnection(ec);
        SQLController sqlControl = storeMgr.getSQLController();
        try {
            PreparedStatement ps = sqlControl.getStatementForQuery(mconn, textStmt);
            try {
                // Provide the primary key field(s) to the JDBC statement
                if (cmd.getIdentityType() == IdentityType.DATASTORE) {
                    StatementMappingIndex datastoreIdx = mappingDefinition.getMappingForMemberPosition(SurrogateColumnType.DATASTORE_ID.getFieldNumber());
                    for (int i = 0; i < datastoreIdx.getNumberOfParameterOccurrences(); i++) {
                        classTable.getSurrogateMapping(SurrogateColumnType.DATASTORE_ID, false).setObject(ec, ps, datastoreIdx.getParameterPositionsForOccurrence(i), op.getInternalObjectId());
                    }
                } else if (cmd.getIdentityType() == IdentityType.APPLICATION) {
                    op.provideFields(cmd.getPKMemberPositions(), new ParameterSetter(op, ps, mappingDefinition));
                }
                ResultSet rs = sqlControl.executeStatementQuery(ec, mconn, textStmt, ps);
                try {
                    if (!rs.next()) {
                        throw new NucleusObjectNotFoundException("No such database row", op.getInternalObjectId());
                    }
                    DatastoreAdapter dba = storeMgr.getDatastoreAdapter();
                    int jdbcMajorVersion = dba.getDriverMajorVersion();
                    if (dba.getDatastoreDriverName().equalsIgnoreCase(OracleAdapter.OJDBC_DRIVER_NAME) && jdbcMajorVersion < 10) {
                        // Oracle JDBC drivers version 9 and below use some sh*tty Oracle-specific CLOB type
                        // we have to cast to that, face west, pray whilst saying ommmmmmmmmmm
                        oracle.sql.CLOB clob = (oracle.sql.CLOB) rs.getClob(1);
                        if (clob != null) {
                            // Deprecated but what can you do
                            clob.putString(1, value);
                        }
                    } else {
                        // Oracle JDBC drivers 10 and above supposedly use the JDBC standard class for Clobs
                        java.sql.Clob clob = rs.getClob(1);
                        if (clob != null) {
                            clob.setString(1, value);
                        }
                    }
                } finally {
                    rs.close();
                }
            } finally {
                sqlControl.closeStatement(mconn, ps);
            }
        } finally {
            mconn.release();
        }
    } catch (SQLException e) {
        throw new NucleusDataStoreException("Update of CLOB value failed: " + textStmt, e);
    }
}

Example 2 with SQLExpression

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

the class QueryToSQLMapper method processLikeExpression.

/* (non-Javadoc)
     * @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processLikeExpression(org.datanucleus.query.expression.Expression)
     */
@Override
protected Object processLikeExpression(Expression expr) {
    SQLExpression right = stack.pop();
    SQLExpression left = stack.pop();
    List args = new ArrayList();
    args.add(right);
    SQLExpression likeExpr = exprFactory.invokeMethod(stmt, String.class.getName(), "like", left, args);
    stack.push(likeExpr);
    return likeExpr;
}

Example 3 with SQLExpression

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

the class QueryToSQLMapper method processNoteqExpression.

/* (non-Javadoc)
     * @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processNoteqExpression(org.datanucleus.query.expression.Expression)
     */
@Override
protected Object processNoteqExpression(Expression expr) {
    SQLExpression right = stack.pop();
    SQLExpression left = stack.pop();
    if (left instanceof ParameterLiteral && !(right instanceof ParameterLiteral)) {
        left = replaceParameterLiteral((ParameterLiteral) left, right.getJavaTypeMapping());
    } else if (right instanceof ParameterLiteral && !(left instanceof ParameterLiteral)) {
        right = replaceParameterLiteral((ParameterLiteral) right, left.getJavaTypeMapping());
    }
    if (left.isParameter() && right.isParameter()) {
        if (left.isParameter() && left instanceof SQLLiteral && ((SQLLiteral) left).getValue() != null) {
            useParameterExpressionAsLiteral((SQLLiteral) left);
        }
        if (right.isParameter() && right instanceof SQLLiteral && ((SQLLiteral) right).getValue() != null) {
            useParameterExpressionAsLiteral((SQLLiteral) right);
        }
    }
    ExpressionUtils.checkAndCorrectExpressionMappingsForBooleanComparison(left, right);
    if (left instanceof UnboundExpression) {
        processUnboundExpression((UnboundExpression) left);
        left = stack.pop();
    }
    if (right instanceof UnboundExpression) {
        processUnboundExpression((UnboundExpression) right);
        right = stack.pop();
    }
    BooleanExpression opExpr = left.ne(right);
    stack.push(opExpr);
    return opExpr;
}

Example 4 with SQLExpression

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

the class QueryToSQLMapper method processCaseExpression.

protected Object processCaseExpression(CaseExpression expr, SQLExpression typeExpr) {
    processingCase = true;
    try {
        List<ExpressionPair> conditions = expr.getConditions();
        Iterator<ExpressionPair> whenExprIter = conditions.iterator();
        SQLExpression[] whenSqlExprs = new SQLExpression[conditions.size()];
        SQLExpression[] actionSqlExprs = new SQLExpression[conditions.size()];
        boolean numericCase = false;
        boolean booleanCase = false;
        boolean stringCase = false;
        boolean typeSet = false;
        if (typeExpr != null) {
            if (typeExpr instanceof NumericExpression) {
                numericCase = true;
                typeSet = true;
            } else if (typeExpr instanceof BooleanExpression) {
                booleanCase = true;
                typeSet = true;
            } else if (typeExpr instanceof StringExpression) {
                stringCase = true;
                typeSet = true;
            }
        }
        int i = 0;
        while (whenExprIter.hasNext()) {
            ExpressionPair pair = whenExprIter.next();
            Expression whenExpr = pair.getWhenExpression();
            whenExpr.evaluate(this);
            whenSqlExprs[i] = stack.pop();
            if (!(whenSqlExprs[i] instanceof BooleanExpression)) {
                throw new QueryCompilerSyntaxException("IF/ELSE conditional expression should return boolean but doesn't : " + expr);
            }
            Expression actionExpr = pair.getActionExpression();
            actionExpr.evaluate(this);
            actionSqlExprs[i] = stack.pop();
            if (!typeSet) {
                if (actionSqlExprs[i] instanceof NumericExpression) {
                    numericCase = true;
                    typeSet = true;
                } else if (actionSqlExprs[i] instanceof BooleanExpression) {
                    booleanCase = true;
                    typeSet = true;
                } else if (actionSqlExprs[i] instanceof StringExpression) {
                    stringCase = true;
                    typeSet = true;
                }
            }
            i++;
        }
        Expression elseExpr = expr.getElseExpression();
        elseExpr.evaluate(this);
        SQLExpression elseActionSqlExpr = stack.pop();
        // Check that all action sql expressions are consistent
        for (int j = 1; j < actionSqlExprs.length; j++) {
            if (!checkCaseExpressionsConsistent(actionSqlExprs[0], actionSqlExprs[j])) {
                throw new QueryCompilerSyntaxException("IF/ELSE action expression " + actionSqlExprs[j] + " is of different type to first action " + actionSqlExprs[0] + " - must be consistent");
            }
        }
        if (!checkCaseExpressionsConsistent(actionSqlExprs[0], elseActionSqlExpr)) {
            throw new QueryCompilerSyntaxException("IF/ELSE action expression " + elseActionSqlExpr + " is of different type to first action " + actionSqlExprs[0] + " - must be consistent");
        }
        SQLExpression caseSqlExpr = null;
        if (numericCase) {
            caseSqlExpr = new org.datanucleus.store.rdbms.sql.expression.CaseNumericExpression(whenSqlExprs, actionSqlExprs, elseActionSqlExpr);
        } else if (booleanCase) {
            caseSqlExpr = new org.datanucleus.store.rdbms.sql.expression.CaseBooleanExpression(whenSqlExprs, actionSqlExprs, elseActionSqlExpr);
        } else if (stringCase) {
            caseSqlExpr = new org.datanucleus.store.rdbms.sql.expression.CaseStringExpression(whenSqlExprs, actionSqlExprs, elseActionSqlExpr);
        } else {
            caseSqlExpr = new org.datanucleus.store.rdbms.sql.expression.CaseExpression(whenSqlExprs, actionSqlExprs, elseActionSqlExpr);
        }
        stack.push(caseSqlExpr);
        return caseSqlExpr;
    } finally {
        processingCase = false;
    }
}

Example 5 with SQLExpression

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

the class QueryToSQLMapper method processBitOrExpression.

/* (non-Javadoc)
     * @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processBitOrExpression(org.datanucleus.query.expression.Expression)
     */
@Override
protected Object processBitOrExpression(Expression expr) {
    SQLExpression rightExpr = stack.pop();
    SQLExpression leftExpr = stack.pop();
    if (rightExpr instanceof BooleanExpression && leftExpr instanceof BooleanExpression) {
        // Handle as Boolean logical OR
        stack.push(leftExpr);
        stack.push(rightExpr);
        return processOrExpression(expr);
    } else if (rightExpr instanceof NumericExpression && leftExpr instanceof NumericExpression) {
        if (storeMgr.getDatastoreAdapter().supportsOption(DatastoreAdapter.OPERATOR_BITWISE_OR)) {
            SQLExpression bitExpr = new NumericExpression(leftExpr, Expression.OP_BIT_OR, rightExpr).encloseInParentheses();
            stack.push(bitExpr);
            return bitExpr;
        }
    }
    // TODO Support BITWISE OR for more cases
    throw new NucleusUserException("Operation BITWISE OR is not supported for " + leftExpr + " and " + rightExpr + " is not supported by this datastore");
}