Examples of org.datanucleus.store.rdbms.sql.expression.SQLExpression

Package org.datanucleus.store.rdbms.sql.expression

Examples of org.datanucleus.store.rdbms.sql.expression.SQLExpression

org.datanucleus.store.rdbms.sql.expression.SQLExpression
Base expression for SQL. The principle here is that any expression (be it a field, literal, parameter, variable etc) has a type and so needs a JavaTypeMapping to control reading/writing of that type. An expression will typically have an SQLTable (in the overall statement) that it refers to. A literal will not have an SQLTable since it represents a value. The actual SQL for the expression is embodied in the SQLText field. Construction typically sets the SQL for the respective expression.

    /* (non-Javadoc)
     * @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processSubExpression(org.datanucleus.query.expression.Expression)
     */
    protected Object processSubExpression(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());
        }


        SQLExpression resultExpr = left.sub(right);
        stack.push(resultExpr);
        return resultExpr;
    }

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     * @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processDistinctExpression(org.datanucleus.query.expression.Expression)
     */
    @Override
    protected Object processDistinctExpression(Expression expr)
    {
        SQLExpression sqlExpr = stack.pop();
        sqlExpr.distinct();
        stack.push(sqlExpr);
        return sqlExpr;
    }

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     */
    @Override
    protected Object processComExpression(Expression expr)
    {
        // Bitwise complement - only for integer values
        SQLExpression sqlExpr = stack.pop();
        SQLExpression resultExpr = sqlExpr.com();
        stack.push(resultExpr);
        return resultExpr;
    }

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     * @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processModExpression(org.datanucleus.query.expression.Expression)
     */
    @Override
    protected Object processModExpression(Expression expr)
    {
        SQLExpression right = stack.pop();
        SQLExpression left = stack.pop();
        SQLExpression resultExpr = left.mod(right);
        stack.push(resultExpr);
        return resultExpr;
    }

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     * @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processNegExpression(org.datanucleus.query.expression.Expression)
     */
    @Override
    protected Object processNegExpression(Expression expr)
    {
        SQLExpression sqlExpr = stack.pop();
        SQLExpression resultExpr = sqlExpr.neg();
        stack.push(resultExpr);
        return resultExpr;
    }

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     */
    @Override
    protected Object processNotExpression(Expression expr)
    {
        // Logical complement - only for boolean values
        SQLExpression sqlExpr = stack.pop();
        SQLExpression resultExpr = sqlExpr.not();
        stack.push(resultExpr);
        return resultExpr;
    }

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     * @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processCastExpression(org.datanucleus.query.expression.CastExpression)
     */
    @Override
    protected Object processCastExpression(Expression expr)
    {
        SQLExpression right = stack.pop(); // The cast literal
        SQLExpression left = stack.pop(); // The expression to cast
        SQLExpression castExpr = left.cast(right);
        stack.push(castExpr);
        return castExpr;
    }

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            i++;
        }


        Expression elseExpr = expr.getElseExpression();
        elseExpr.evaluate(this);
        SQLExpression elseSqlExpr = stack.pop();


        SQLExpression caseSqlExpr = new org.datanucleus.store.rdbms.sql.expression.CaseExpression(
            whenSqlExprs, actionSqlExprs, elseSqlExpr);
        stack.push(caseSqlExpr);
        return caseSqlExpr;
    }

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     * @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processIsExpression(org.datanucleus.query.expression.Expression)
     */
    @Override
    protected Object processIsExpression(Expression expr)
    {
        SQLExpression right = stack.pop();
        SQLExpression left = stack.pop();
        SQLExpression instanceofExpr = left.is(right, false);
        stack.push(instanceofExpr);
        return instanceofExpr;
    }

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     * @see org.datanucleus.query.evaluator.AbstractExpressionEvaluator#processIsnotExpression(org.datanucleus.query.expression.Expression)
     */
    @Override
    protected Object processIsnotExpression(Expression expr)
    {
        SQLExpression right = stack.pop();
        SQLExpression left = stack.pop();
        SQLExpression instanceofExpr = left.is(right, true);
        stack.push(instanceofExpr);
        return instanceofExpr;
    }

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Related Classes of org.datanucleus.store.rdbms.sql.expression.SQLExpression

org.datanucleus.store.rdbms.query.QueryToSQLMapper

org.datanucleus.store.rdbms.RDBMSStoreHelper

org.datanucleus.store.rdbms.sql.method.ArrayContainsMethod

org.datanucleus.store.rdbms.sql.method.CollectionContainsMethod

org.datanucleus.store.rdbms.sql.method.ListGetMethod

org.datanucleus.store.rdbms.sql.method.MapContainsEntryMethod

org.datanucleus.store.rdbms.sql.method.MapContainsKeyMethod

org.datanucleus.store.rdbms.sql.method.MapContainsValueMethod

org.datanucleus.store.rdbms.sql.method.MapGetMethod

org.datanucleus.store.rdbms.sql.method.MathSqrtMethod

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