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

Example 41 with SQLExpression

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

the class MapValueMethod method getAsSubquery.

/**
 * Implementation of VALUE(map) using a subquery on the table representing the map, returning the value.
 * @param stmt SQLStatement
 * @param mapExpr The map expression
 * @return The value expression
 */
protected SQLExpression getAsSubquery(SQLStatement stmt, MapExpression mapExpr) {
    AbstractMemberMetaData mmd = mapExpr.getJavaTypeMapping().getMemberMetaData();
    MapMetaData mapmd = mmd.getMap();
    RDBMSStoreManager storeMgr = stmt.getRDBMSManager();
    ClassLoaderResolver clr = stmt.getQueryGenerator().getClassLoaderResolver();
    JavaTypeMapping ownerMapping = null;
    JavaTypeMapping valMapping = null;
    Table mapTbl = null;
    if (mapmd.getMapType() == MapType.MAP_TYPE_JOIN) {
        // JoinTable
        mapTbl = storeMgr.getTable(mmd);
        ownerMapping = ((MapTable) mapTbl).getOwnerMapping();
        valMapping = ((MapTable) mapTbl).getValueMapping();
    } else if (mapmd.getMapType() == MapType.MAP_TYPE_KEY_IN_VALUE) {
        // ForeignKey from value table to key
        AbstractClassMetaData valCmd = mapmd.getValueClassMetaData(clr);
        mapTbl = storeMgr.getDatastoreClass(mmd.getMap().getValueType(), clr);
        if (mmd.getMappedBy() != null) {
            ownerMapping = mapTbl.getMemberMapping(valCmd.getMetaDataForMember(mmd.getMappedBy()));
        } else {
            ownerMapping = ((DatastoreClass) mapTbl).getExternalMapping(mmd, MappingType.EXTERNAL_FK);
        }
        valMapping = mapTbl.getIdMapping();
    } else if (mapmd.getMapType() == MapType.MAP_TYPE_VALUE_IN_KEY) {
        // ForeignKey from key table to value
        AbstractClassMetaData keyCmd = mapmd.getKeyClassMetaData(clr);
        mapTbl = storeMgr.getDatastoreClass(mmd.getMap().getKeyType(), clr);
        if (mmd.getMappedBy() != null) {
            ownerMapping = mapTbl.getMemberMapping(keyCmd.getMetaDataForMember(mmd.getMappedBy()));
        } else {
            ownerMapping = ((DatastoreClass) mapTbl).getExternalMapping(mmd, MappingType.EXTERNAL_FK);
        }
        String valFieldName = mmd.getValueMetaData().getMappedBy();
        AbstractMemberMetaData keyValMmd = keyCmd.getMetaDataForMember(valFieldName);
        valMapping = mapTbl.getMemberMapping(keyValMmd);
    } else {
        throw new NucleusException("Invalid map for " + mapExpr + " in get() call");
    }
    SQLExpressionFactory exprFactory = stmt.getSQLExpressionFactory();
    SelectStatement subStmt = new SelectStatement(stmt, storeMgr, mapTbl, null, null);
    subStmt.setClassLoaderResolver(clr);
    SQLExpression valExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), valMapping);
    subStmt.select(valExpr, null);
    // Link to primary statement
    SQLExpression elementOwnerExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), ownerMapping);
    SQLExpression ownerIdExpr = exprFactory.newExpression(stmt, mapExpr.getSQLTable(), mapExpr.getSQLTable().getTable().getIdMapping());
    subStmt.whereAnd(elementOwnerExpr.eq(ownerIdExpr), true);
    SubqueryExpression subExpr = new SubqueryExpression(stmt, subStmt);
    subExpr.setJavaTypeMapping(valMapping);
    return subExpr;
}

Example 42 with SQLExpression

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

the class MathAbsMethod 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 ignore, List<SQLExpression> args) {
    if (args == null || args.size() == 0) {
        throw new NucleusUserException("Cannot invoke Math.abs without an argument");
    }
    SQLExpression expr = args.get(0);
    if (expr == null) {
        return new NullLiteral(stmt, null, null, null);
    } else if (expr instanceof SQLLiteral) {
        if (expr instanceof ByteLiteral) {
            int originalValue = ((BigInteger) ((ByteLiteral) expr).getValue()).intValue();
            BigInteger absValue = new BigInteger(String.valueOf(Math.abs(originalValue)));
            return new ByteLiteral(stmt, expr.getJavaTypeMapping(), absValue, null);
        } else if (expr instanceof IntegerLiteral) {
            int originalValue = ((Number) ((IntegerLiteral) expr).getValue()).intValue();
            Integer absValue = Integer.valueOf(Math.abs(originalValue));
            return new IntegerLiteral(stmt, expr.getJavaTypeMapping(), absValue, null);
        } else if (expr instanceof FloatingPointLiteral) {
            double originalValue = ((BigDecimal) ((FloatingPointLiteral) expr).getValue()).doubleValue();
            Double absValue = new Double(Math.abs(originalValue));
            return new FloatingPointLiteral(stmt, expr.getJavaTypeMapping(), absValue, null);
        }
        throw new IllegalExpressionOperationException("Math.abs()", expr);
    } else {
        // Relay to the equivalent "abs(expr)" function
        SQLExpressionFactory exprFactory = stmt.getSQLExpressionFactory();
        return exprFactory.invokeMethod(stmt, null, "abs", null, args);
    }
}

Example 43 with SQLExpression

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

the class MathAsinMethod 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 ignore, List<SQLExpression> args) {
    if (args == null || args.size() == 0) {
        throw new NucleusUserException("Cannot invoke Math.asin without an argument");
    }
    SQLExpression expr = args.get(0);
    if (expr == null) {
        return new NullLiteral(stmt, null, null, null);
    } else if (expr instanceof SQLLiteral) {
        if (expr instanceof ByteLiteral) {
            int originalValue = ((BigInteger) ((ByteLiteral) expr).getValue()).intValue();
            BigInteger absValue = new BigInteger(String.valueOf(Math.asin(originalValue)));
            return new ByteLiteral(stmt, expr.getJavaTypeMapping(), absValue, null);
        } else if (expr instanceof IntegerLiteral) {
            int originalValue = ((Number) ((IntegerLiteral) expr).getValue()).intValue();
            Double absValue = new Double(Math.asin(originalValue));
            return new FloatingPointLiteral(stmt, expr.getJavaTypeMapping(), absValue, null);
        } else if (expr instanceof FloatingPointLiteral) {
            double originalValue = ((BigDecimal) ((FloatingPointLiteral) expr).getValue()).doubleValue();
            Double absValue = new Double(Math.asin(originalValue));
            return new FloatingPointLiteral(stmt, expr.getJavaTypeMapping(), absValue, null);
        }
        throw new IllegalExpressionOperationException("Math.asin()", expr);
    } else {
        // Relay to the equivalent "asin(expr)" function
        SQLExpressionFactory exprFactory = stmt.getSQLExpressionFactory();
        return exprFactory.invokeMethod(stmt, null, "asin", null, args);
    }
}

Example 44 with SQLExpression

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

the class ArrayContainsMethod 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() != 1) {
        throw new NucleusException("Incorrect arguments for Array.contains(SQLExpression)");
    }
    ClassLoaderResolver clr = stmt.getQueryGenerator().getClassLoaderResolver();
    SQLExpressionFactory exprFactory = stmt.getSQLExpressionFactory();
    ArrayExpression arrExpr = (ArrayExpression) expr;
    SQLExpression elemExpr = args.get(0);
    if (elemExpr.isParameter()) {
        // Element is a parameter so make sure its type is set
        AbstractMemberMetaData mmd = arrExpr.getJavaTypeMapping().getMemberMetaData();
        if (mmd != null) {
            stmt.getQueryGenerator().bindParameter(elemExpr.getParameterName(), mmd.getType().getComponentType());
        }
    }
    if (expr instanceof ArrayLiteral) {
        if (elemExpr instanceof UnboundExpression) {
            Class elemCls = clr.classForName(arrExpr.getJavaTypeMapping().getType()).getComponentType();
            elemExpr = stmt.getQueryGenerator().bindVariable((UnboundExpression) elemExpr, elemCls);
        }
        ArrayLiteral lit = (ArrayLiteral) expr;
        Object array = lit.getValue();
        JavaTypeMapping m = exprFactory.getMappingForType(boolean.class, true);
        if (array == null || Array.getLength(array) == 0) {
            return exprFactory.newLiteral(stmt, m, true).eq(exprFactory.newLiteral(stmt, m, false));
        }
        if (arrExpr.isParameter()) {
            stmt.getQueryGenerator().useParameterExpressionAsLiteral((ArrayLiteral) arrExpr);
        }
        boolean useInExpression = false;
        List<SQLExpression> collElementExprs = lit.getElementExpressions();
        if (collElementExprs != null && !collElementExprs.isEmpty()) {
            // Make sure the the collection element(s) are compatible with the elemExpr
            boolean incompatible = true;
            Class elemtype = clr.classForName(elemExpr.getJavaTypeMapping().getType());
            Iterator<SQLExpression> collElementExprIter = collElementExprs.iterator();
            while (collElementExprIter.hasNext()) {
                SQLExpression collElementExpr = collElementExprIter.next();
                Class collElemType = clr.classForName(collElementExpr.getJavaTypeMapping().getType());
                if (elementTypeCompatible(elemtype, collElemType)) {
                    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 collElementExpr = collElementExprs.get(0);
            if (collElementExpr instanceof StringExpression || collElementExpr instanceof NumericExpression || collElementExpr instanceof TemporalExpression || collElementExpr instanceof CharacterExpression || collElementExpr instanceof EnumExpression) {
                useInExpression = true;
            }
        }
        if (useInExpression) {
            // Return "elem IN (val1, val2, ...)"
            SQLExpression[] exprs = (collElementExprs != null ? collElementExprs.toArray(new SQLExpression[collElementExprs.size()]) : null);
            return new InExpression(elemExpr, exprs);
        }
        // TODO If elemExpr is a parameter and collExpr is derived from a parameter ?
        BooleanExpression bExpr = null;
        List<SQLExpression> elementExprs = lit.getElementExpressions();
        for (int i = 0; i < elementExprs.size(); i++) {
            SQLExpression arrElemExpr = elementExprs.get(i);
            if (bExpr == null) {
                bExpr = arrElemExpr.eq(elemExpr);
            } else {
                bExpr = bExpr.ior(arrElemExpr.eq(elemExpr));
            }
        }
        if (bExpr != null) {
            bExpr.encloseInParentheses();
        }
        return bExpr;
    } else if (arrExpr.getElementExpressions() != null) {
        if (elemExpr instanceof UnboundExpression) {
            Class elemCls = clr.classForName(arrExpr.getJavaTypeMapping().getType()).getComponentType();
            elemExpr = stmt.getQueryGenerator().bindVariable((UnboundExpression) elemExpr, elemCls);
        }
        // Array defined in query that has some expressions for elements, so just do OR chain
        BooleanExpression bExpr = null;
        List<SQLExpression> elementExprs = arrExpr.getElementExpressions();
        for (int i = 0; i < elementExprs.size(); i++) {
            SQLExpression arrElemExpr = elementExprs.get(i);
            if (bExpr == null) {
                bExpr = arrElemExpr.eq(elemExpr);
            } else {
                bExpr = bExpr.ior(arrElemExpr.eq(elemExpr));
            }
        }
        if (bExpr != null) {
            bExpr.encloseInParentheses();
        }
        return bExpr;
    } else {
        // TODO Support inner join variant
        return containsAsSubquery(stmt, arrExpr, elemExpr);
    }
}

Example 45 with SQLExpression

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

the class ArrayContainsMethod method containsAsSubquery.

/**
 * Method to return an expression for Collection.contains 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>Collection of NonPC using join table</b>
 * <pre>
 * SELECT 1 FROM JOIN_TBL A0_SUB
 * WHERE A0_SUB.JOIN_OWN_ID = A0.ID AND A0_SUB.JOIN_ELEM_ID = {elemExpr}
 * </pre>
 * </li>
 * <li><b>Collection of PC using join table</b>
 * <pre>
 * SELECT 1 FROM ELEM_TABLE A0_SUB INNER JOIN JOIN_TBL B0 ON ...
 * WHERE B0.JOIN_OWN_ID = A0.ID AND A0_SUB.ID = {elemExpr}
 * </pre>
 * </li>
 * </ul>
 * and returns a BooleanSubqueryExpression ("EXISTS (subquery)")
 * @param stmt SQLStatement
 * @param arrExpr Collection expression
 * @param elemExpr Expression for the element
 * @return Contains expression
 */
protected SQLExpression containsAsSubquery(SQLStatement stmt, ArrayExpression arrExpr, SQLExpression elemExpr) {
    boolean elemIsUnbound = (elemExpr instanceof UnboundExpression);
    String varName = null;
    if (elemIsUnbound) {
        varName = ((UnboundExpression) elemExpr).getVariableName();
        NucleusLogger.QUERY.debug(">> Array.contains binding unbound variable " + varName + " using SUBQUERY");
    }
    RDBMSStoreManager storeMgr = stmt.getRDBMSManager();
    SQLExpressionFactory exprFactory = stmt.getSQLExpressionFactory();
    ClassLoaderResolver clr = stmt.getQueryGenerator().getClassLoaderResolver();
    AbstractMemberMetaData mmd = arrExpr.getJavaTypeMapping().getMemberMetaData();
    AbstractClassMetaData elemCmd = mmd.getArray().getElementClassMetaData(clr);
    ArrayTable joinTbl = (ArrayTable) storeMgr.getTable(mmd);
    SelectStatement subStmt = null;
    if (joinTbl != null) {
        // JoinTable array
        if (elemCmd == null) {
            // Array<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 array owner
            JavaTypeMapping ownerMapping = ((JoinTable) joinTbl).getOwnerMapping();
            SQLExpression ownerExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), ownerMapping);
            SQLExpression ownerIdExpr = exprFactory.newExpression(stmt, arrExpr.getSQLTable(), arrExpr.getSQLTable().getTable().getIdMapping());
            subStmt.whereAnd(ownerExpr.eq(ownerIdExpr), true);
            SQLExpression elemIdExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), joinTbl.getElementMapping());
            if (elemIsUnbound) {
                // Bind the variable in the QueryGenerator
                stmt.getQueryGenerator().bindVariable(varName, null, elemIdExpr.getSQLTable(), elemIdExpr.getJavaTypeMapping());
            } else {
                // Add restrict to element
                subStmt.whereAnd(elemIdExpr.eq(elemExpr), true);
            }
        } else {
            // Array<PC>
            DatastoreClass elemTbl = storeMgr.getDatastoreClass(mmd.getArray().getElementType(), clr);
            subStmt = new SelectStatement(stmt, storeMgr, elemTbl, 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(), elemTbl.getIdMapping(), null, joinTbl, null, joinTbl.getElementMapping(), null, null, null, true, null);
            // Restrict to array owner
            JavaTypeMapping ownerMapping = ((JoinTable) joinTbl).getOwnerMapping();
            SQLExpression ownerExpr = exprFactory.newExpression(subStmt, joinSqlTbl, ownerMapping);
            SQLExpression ownerIdExpr = exprFactory.newExpression(stmt, arrExpr.getSQLTable(), arrExpr.getSQLTable().getTable().getIdMapping());
            subStmt.whereAnd(ownerExpr.eq(ownerIdExpr), true);
            SQLExpression elemIdExpr = exprFactory.newExpression(subStmt, subStmt.getPrimaryTable(), elemTbl.getIdMapping());
            if (elemIsUnbound) {
                // Bind the variable in the QueryGenerator
                stmt.getQueryGenerator().bindVariable(varName, elemCmd, elemIdExpr.getSQLTable(), elemIdExpr.getJavaTypeMapping());
            } else {
                // Add restrict to element
                subStmt.whereAnd(elemIdExpr.eq(elemExpr), true);
            }
        }
    } else {
        // TODO Support FK array ?
        throw new NucleusException("Dont support evaluation of ARRAY.contains when no join table is used");
    }
    return new BooleanSubqueryExpression(stmt, "EXISTS", subStmt);
}