Examples with IsNullExpression net.sf.jsqlparser.expression.operators.relational.IsNullExpression used on opensource projects

Example 1 with IsNullExpression

use of net.sf.jsqlparser.expression.operators.relational.IsNullExpression in project herddb by diennea.

the class SQLExpressionCompiler method compileExpression.

// this method never returns NULL
public static CompiledSQLExpression compileExpression(String validatedTableAlias, Expression exp) {
    if (exp instanceof BinaryExpression) {
        CompiledSQLExpression compiled = compileSpecialBinaryExpression(validatedTableAlias, exp);
        if (compiled != null) {
            return compiled;
        }
    }
    if (exp instanceof net.sf.jsqlparser.schema.Column) {
        return compileColumnExpression(validatedTableAlias, exp);
    } else if (exp instanceof StringValue) {
        return new ConstantExpression(RawString.of(((StringValue) exp).getValue()));
    } else if (exp instanceof LongValue) {
        try {
            return new ConstantExpression(((LongValue) exp).getValue());
        } catch (NumberFormatException largeNumber) {
            return new ConstantExpression(Double.valueOf(((LongValue) exp).getStringValue()));
        }
    } else if (exp instanceof DoubleValue) {
        return new ConstantExpression(((DoubleValue) exp).getValue());
    } else if (exp instanceof TimestampValue) {
        return new ConstantExpression(((TimestampValue) exp).getValue());
    } else if (exp instanceof NullValue) {
        return new ConstantExpression(null);
    } else if (exp instanceof TimeKeyExpression) {
        TimeKeyExpression ext = (TimeKeyExpression) exp;
        if (CURRENT_TIMESTAMP.equalsIgnoreCase(ext.getStringValue())) {
            return new ConstantExpression(new java.sql.Timestamp(System.currentTimeMillis()));
        } else {
            throw new StatementExecutionException("unhandled expression " + exp);
        }
    } else if (exp instanceof JdbcParameter) {
        int index = ((JdbcParameter) exp).getIndex() - 1;
        return new JdbcParameterExpression(index);
    } else if (exp instanceof AndExpression) {
        return tryCompileBinaryExpression(validatedTableAlias, (BinaryExpression) exp, (a, b, c) -> new CompiledAndExpression(a, b, c));
    } else if (exp instanceof OrExpression) {
        return tryCompileBinaryExpression(validatedTableAlias, (BinaryExpression) exp, (a, b, c) -> new CompiledOrExpression(a, b, c));
    } else if (exp instanceof Function) {
        return CompiledFunction.create((Function) exp, validatedTableAlias);
    } else if (exp instanceof Addition) {
        return tryCompileBinaryExpression(validatedTableAlias, (BinaryExpression) exp, (a, b, c) -> new CompiledAddExpression(a, b, c));
    } else if (exp instanceof Subtraction) {
        return tryCompileBinaryExpression(validatedTableAlias, (BinaryExpression) exp, (a, b, c) -> new CompiledSubtractExpression(a, b, c));
    } else if (exp instanceof Multiplication) {
        return tryCompileBinaryExpression(validatedTableAlias, (BinaryExpression) exp, (a, b, c) -> new CompiledMultiplyExpression(a, b, c));
    } else if (exp instanceof Division) {
        return tryCompileBinaryExpression(validatedTableAlias, (BinaryExpression) exp, (a, b, c) -> new CompiledDivideExpression(a, b, c));
    } else if (exp instanceof Parenthesis) {
        Parenthesis p = (Parenthesis) exp;
        CompiledSQLExpression inner = compileExpression(validatedTableAlias, p.getExpression());
        return new CompiledParenthesisExpression(p.isNot(), inner);
    } else if (exp instanceof EqualsTo) {
        return tryCompileBinaryExpression(validatedTableAlias, (BinaryExpression) exp, (a, b, c) -> new CompiledEqualsExpression(a, b, c));
    } else if (exp instanceof NotEqualsTo) {
        return tryCompileBinaryExpression(validatedTableAlias, (BinaryExpression) exp, (a, b, c) -> new CompiledNotEqualsExpression(a, b, c));
    } else if (exp instanceof MinorThan) {
        return tryCompileBinaryExpression(validatedTableAlias, (BinaryExpression) exp, (a, b, c) -> new CompiledMinorThenExpression(a, b, c));
    } else if (exp instanceof MinorThanEquals) {
        return tryCompileBinaryExpression(validatedTableAlias, (BinaryExpression) exp, (a, b, c) -> new CompiledMinorThenEqualsExpression(a, b, c));
    } else if (exp instanceof GreaterThan) {
        return tryCompileBinaryExpression(validatedTableAlias, (BinaryExpression) exp, (a, b, c) -> new CompiledGreaterThenExpression(a, b, c));
    } else if (exp instanceof GreaterThanEquals) {
        return tryCompileBinaryExpression(validatedTableAlias, (BinaryExpression) exp, (a, b, c) -> new CompiledGreaterThenEqualsExpression(a, b, c));
    } else if (exp instanceof LikeExpression) {
        return tryCompileBinaryExpression(validatedTableAlias, (BinaryExpression) exp, (a, b, c) -> new CompiledLikeExpression(a, b, c));
    } else if (exp instanceof Between) {
        return CompiledBetweenExpression.create(validatedTableAlias, (Between) exp);
    } else if (exp instanceof SignedExpression) {
        SignedExpression s = (SignedExpression) exp;
        CompiledSQLExpression inner = compileExpression(validatedTableAlias, s.getExpression());
        return new CompiledSignedExpression(s.getSign(), inner);
    } else if (exp instanceof InExpression) {
        InExpression in = (InExpression) exp;
        return CompiledInExpression.create(in, validatedTableAlias);
    } else if (exp instanceof IsNullExpression) {
        IsNullExpression i = (IsNullExpression) exp;
        CompiledSQLExpression left = compileExpression(validatedTableAlias, i.getLeftExpression());
        return new CompiledIsNullExpression(i.isNot(), left);
    } else if (exp instanceof CaseExpression) {
        return CompiledCaseExpression.create(validatedTableAlias, (CaseExpression) exp);
    }
    throw new StatementExecutionException("unsupported operand " + exp.getClass() + ", expression is " + exp);
}

Example 2 with IsNullExpression

use of net.sf.jsqlparser.expression.operators.relational.IsNullExpression in project herddb by diennea.

the class SQLParserExpressionCompiler method compileExpressionInternal.

private static CompiledSQLExpression compileExpressionInternal(Expression expression, OpSchema tableSchema) {
    if (expression == null) {
        return null;
    }
    if (expression instanceof JdbcParameter) {
        JdbcParameter p = (JdbcParameter) expression;
        return new JdbcParameterExpression(p.getIndex() - 1);
    } else if (expression instanceof StringValue || expression instanceof LongValue || expression instanceof NullValue || expression instanceof DoubleValue || expression instanceof TimestampValue) {
        return JSQLParserPlanner.resolveValueAsCompiledSQLExpression(expression, false);
    } else if (expression instanceof net.sf.jsqlparser.schema.Column) {
        // mapping a reference to a Column to the index in the schema of the table
        net.sf.jsqlparser.schema.Column col = (net.sf.jsqlparser.schema.Column) expression;
        String tableAlias = extractTableName(col);
        // no fix backtick, handle false/true literals, without backticks
        String columnName = col.getColumnName();
        if (isBooleanLiteral(col)) {
            return new ConstantExpression(Boolean.parseBoolean(columnName.toLowerCase()), ColumnTypes.NOTNULL_BOOLEAN);
        }
        IntHolder indexInSchema = new IntHolder(-1);
        ColumnRef found = findColumnInSchema(tableAlias, columnName, tableSchema, indexInSchema);
        if (indexInSchema.value == -1 || found == null) {
            String nameInError = tableAlias != null ? tableAlias + "." + columnName : columnName;
            throw new StatementExecutionException("Column " + nameInError + " not found in target table (schema " + tableSchema + ")");
        }
        return new AccessCurrentRowExpression(indexInSchema.value, found.type);
    } else if (expression instanceof BinaryExpression) {
        return compileBinaryExpression((BinaryExpression) expression, tableSchema);
    } else if (expression instanceof IsNullExpression) {
        IsNullExpression eq = (IsNullExpression) expression;
        CompiledSQLExpression left = compileExpression(eq.getLeftExpression(), tableSchema);
        return new CompiledIsNullExpression(eq.isNot(), left);
    } else if (expression instanceof NotExpression) {
        NotExpression eq = (NotExpression) expression;
        CompiledSQLExpression left = compileExpression(eq.getExpression(), tableSchema);
        return new CompiledNotExpression(left);
    } else if (expression instanceof Parenthesis) {
        Parenthesis eq = (Parenthesis) expression;
        return compileExpression(eq.getExpression(), tableSchema);
    } else if (expression instanceof SignedExpression) {
        SignedExpression eq = (SignedExpression) expression;
        return new CompiledSignedExpression(eq.getSign(), compileExpression(eq.getExpression(), tableSchema));
    } else if (expression instanceof InExpression) {
        InExpression eq = (InExpression) expression;
        checkSupported(eq.getOldOracleJoinSyntax() == EqualsTo.NO_ORACLE_JOIN);
        checkSupported(eq.getOraclePriorPosition() == EqualsTo.NO_ORACLE_PRIOR);
        checkSupported(eq.getLeftItemsList() == null);
        checkSupported(eq.getMultiExpressionList() == null);
        checkSupported(eq.getRightExpression() == null);
        CompiledSQLExpression left = compileExpression(eq.getLeftExpression(), tableSchema);
        ItemsList rightItemsList = eq.getRightItemsList();
        checkSupported(rightItemsList instanceof ExpressionList, "Sub Selects are not supported with jSQLParser");
        ExpressionList expressionList = (ExpressionList) rightItemsList;
        CompiledSQLExpression[] values = new CompiledSQLExpression[expressionList.getExpressions().size()];
        int i = 0;
        for (Expression exp : expressionList.getExpressions()) {
            values[i++] = compileExpression(exp, tableSchema);
        }
        return new CompiledInExpression(left, values);
    } else if (expression instanceof TimeKeyExpression) {
        TimeKeyExpression eq = (TimeKeyExpression) expression;
        if (eq.getStringValue().equalsIgnoreCase("CURRENT_TIMESTAMP")) {
            return new CompiledFunction(BuiltinFunctions.CURRENT_TIMESTAMP, Collections.emptyList());
        }
    // fallthru
    } else if (expression instanceof Function) {
        Function eq = (Function) expression;
        checkSupported(eq.getKeep() == null);
        checkSupported(eq.getMultipartName() != null && eq.getMultipartName().size() == 1);
        checkSupported(eq.getNamedParameters() == null);
        checkSupported(eq.getAttribute() == null);
        checkSupported(eq.getAttributeName() == null);
        List<CompiledSQLExpression> operands = new ArrayList<>();
        if (eq.getParameters() != null) {
            for (Expression e : eq.getParameters().getExpressions()) {
                operands.add(compileExpression(e, tableSchema));
            }
        }
        switch(eq.getName().toUpperCase()) {
            case BuiltinFunctions.NAME_LOWERCASE:
                return new CompiledFunction(BuiltinFunctions.LOWER, operands);
            case BuiltinFunctions.NAME_UPPER:
                return new CompiledFunction(BuiltinFunctions.UPPER, operands);
            case BuiltinFunctions.NAME_ABS:
                return new CompiledFunction(BuiltinFunctions.ABS, operands);
            case BuiltinFunctions.NAME_AVG:
                return new CompiledFunction(BuiltinFunctions.AVG, operands);
            case BuiltinFunctions.NAME_ROUND:
                return new CompiledFunction(BuiltinFunctions.ROUND, operands);
            case BuiltinFunctions.NAME_EXTRACT:
                return new CompiledFunction(BuiltinFunctions.EXTRACT, operands);
            case BuiltinFunctions.NAME_FLOOR:
                return new CompiledFunction(BuiltinFunctions.FLOOR, operands);
            case BuiltinFunctions.NAME_RAND:
                return new CompiledFunction(BuiltinFunctions.RAND, operands);
            default:
        }
    // fallthru
    } else if (expression instanceof CaseExpression) {
        CaseExpression eq = (CaseExpression) expression;
        checkSupported(eq.getSwitchExpression() == null);
        List<WhenClause> whenClauses = eq.getWhenClauses();
        List<Map.Entry<CompiledSQLExpression, CompiledSQLExpression>> cases = new ArrayList<>(whenClauses.size());
        for (WhenClause c : whenClauses) {
            cases.add(new AbstractMap.SimpleImmutableEntry<>(compileExpression(c.getWhenExpression(), tableSchema), compileExpression(c.getThenExpression(), tableSchema)));
        }
        CompiledSQLExpression elseExp = eq.getElseExpression() != null ? compileExpression(eq.getElseExpression(), tableSchema) : null;
        return new CompiledCaseExpression(cases, elseExp);
    } else if (expression instanceof Between) {
        Between b = (Between) expression;
        boolean not = b.isNot();
        CompiledSQLExpression baseValue = compileExpression(b.getLeftExpression(), tableSchema);
        CompiledSQLExpression start = compileExpression(b.getBetweenExpressionStart(), tableSchema);
        CompiledSQLExpression end = compileExpression(b.getBetweenExpressionEnd(), tableSchema);
        CompiledSQLExpression result = new CompiledAndExpression(new CompiledGreaterThanEqualsExpression(baseValue, start), new CompiledMinorThanEqualsExpression(baseValue, end));
        if (not) {
            return new CompiledNotExpression(result);
        } else {
            return result;
        }
    } else if (expression instanceof net.sf.jsqlparser.expression.CastExpression) {
        net.sf.jsqlparser.expression.CastExpression b = (net.sf.jsqlparser.expression.CastExpression) expression;
        CompiledSQLExpression left = compileExpression(b.getLeftExpression(), tableSchema);
        int type = JSQLParserPlanner.sqlDataTypeToColumnType(b.getType());
        return new CastExpression(left, type);
    }
    // }
    throw new StatementExecutionException("not implemented expression type " + expression.getClass() + ": " + expression);
}