Examples with Expression com.alibaba.cobar.parser.ast.expression.Expression used on opensource projects

Example 66 with Expression

use of com.alibaba.cobar.parser.ast.expression.Expression in project cobar by alibaba.

the class MySQLExprParser method unaryOpExpression.

/**
     * <code>('+'|'-'|'~'|'!'|'BINARY')* higherExpr</code><br/>
     * '!' has higher precedence
     */
private Expression unaryOpExpression(String consumed, String consumedUp) throws SQLSyntaxErrorException {
    if (consumed == null) {
        Expression expr;
        switch(lexer.token()) {
            case OP_EXCLAMATION:
                lexer.nextToken();
                expr = unaryOpExpression(null, null);
                return new NegativeValueExpression(expr).setCacheEvalRst(cacheEvalRst);
            case OP_PLUS:
                lexer.nextToken();
                return unaryOpExpression(null, null);
            case OP_MINUS:
                lexer.nextToken();
                expr = unaryOpExpression(null, null);
                return new MinusExpression(expr).setCacheEvalRst(cacheEvalRst);
            case OP_TILDE:
                lexer.nextToken();
                expr = unaryOpExpression(null, null);
                return new BitInvertExpression(expr).setCacheEvalRst(cacheEvalRst);
            case KW_BINARY:
                lexer.nextToken();
                expr = unaryOpExpression(null, null);
                return new CastBinaryExpression(expr).setCacheEvalRst(cacheEvalRst);
        }
    }
    return collateExpression(consumed, consumedUp);
}

Example 67 with Expression

use of com.alibaba.cobar.parser.ast.expression.Expression in project cobar by alibaba.

the class MySQLExprParser method logicalAndExpression.

/**
     * <code>higherPRJExpr ( ('AND'|'&&') higherPRJExpr )*</code>
     * 
     * @throws SQLSyntaxErrorException
     */
private Expression logicalAndExpression() throws SQLSyntaxErrorException {
    LogicalAndExpression and = null;
    for (Expression expr = logicalNotExpression(); ; ) {
        switch(lexer.token()) {
            case OP_LOGICAL_AND:
            case KW_AND:
                lexer.nextToken();
                if (and == null) {
                    and = new LogicalAndExpression();
                    and.setCacheEvalRst(cacheEvalRst);
                    and.appendOperand(expr);
                    expr = and;
                }
                Expression newExpr = logicalNotExpression();
                and.appendOperand(newExpr);
                break;
            default:
                return expr;
        }
    }
}

Example 68 with Expression

use of com.alibaba.cobar.parser.ast.expression.Expression in project cobar by alibaba.

the class MySQLExprParser method type4specialFunc.

/**
     * @return never null
     */
private Pair<String, Pair<Expression, Expression>> type4specialFunc() throws SQLSyntaxErrorException {
    Expression exp1 = null;
    Expression exp2 = null;
    // DATE
    // DATETIME
    // SIGNED [INTEGER]
    // TIME
    String typeName;
    switch(lexer.token()) {
        case KW_BINARY:
        case KW_CHAR:
            typeName = MySQLToken.keyWordToString(lexer.token());
            if (lexer.nextToken() == PUNC_LEFT_PAREN) {
                lexer.nextToken();
                exp1 = expression();
                match(PUNC_RIGHT_PAREN);
            }
            return constructTypePair(typeName, exp1, exp2);
        case KW_DECIMAL:
            typeName = MySQLToken.keyWordToString(lexer.token());
            if (lexer.nextToken() == PUNC_LEFT_PAREN) {
                lexer.nextToken();
                exp1 = expression();
                if (lexer.token() == PUNC_COMMA) {
                    lexer.nextToken();
                    exp2 = expression();
                }
                match(PUNC_RIGHT_PAREN);
            }
            return constructTypePair(typeName, exp1, exp2);
        case KW_UNSIGNED:
            typeName = MySQLToken.keyWordToString(lexer.token());
            if (lexer.nextToken() == KW_INTEGER) {
                lexer.nextToken();
            }
            return constructTypePair(typeName, null, null);
        case IDENTIFIER:
            typeName = lexer.stringValueUppercase();
            lexer.nextToken();
            if ("SIGNED".equals(typeName)) {
                if (lexer.token() == KW_INTEGER) {
                    lexer.nextToken();
                }
            } else if (!"DATE".equals(typeName) && !"DATETIME".equals(typeName) && !"TIME".equals(typeName)) {
                throw err("invalide type name: " + typeName);
            }
            return constructTypePair(typeName, null, null);
        default:
            throw err("invalide type name: " + lexer.stringValueUppercase());
    }
}

Example 69 with Expression

use of com.alibaba.cobar.parser.ast.expression.Expression in project cobar by alibaba.

the class MySQLExprParser method bitShiftExpression.

/**
     * <code>higherExpr ( ('&lt;&lt;'|'&gt;&gt;') higherExpr)+</code>
     */
private Expression bitShiftExpression(String consumed, String consumedUp) throws SQLSyntaxErrorException {
    Expression temp;
    for (Expression expr = arithmeticTermOperatorExpression(consumed, consumedUp); ; ) {
        switch(lexer.token()) {
            case OP_LEFT_SHIFT:
                lexer.nextToken();
                temp = arithmeticTermOperatorExpression(null, null);
                expr = new BitShiftExpression(false, expr, temp).setCacheEvalRst(cacheEvalRst);
                break;
            case OP_RIGHT_SHIFT:
                lexer.nextToken();
                temp = arithmeticTermOperatorExpression(null, null);
                expr = new BitShiftExpression(true, expr, temp).setCacheEvalRst(cacheEvalRst);
                break;
            default:
                return expr;
        }
    }
}

Example 70 with Expression

use of com.alibaba.cobar.parser.ast.expression.Expression in project cobar by alibaba.

the class MySQLExprParser method functionConvert.

/**
     * first '(' has been consumed
     */
private Convert functionConvert() throws SQLSyntaxErrorException {
    Expression expr = expression();
    match(KW_USING);
    String tempStr = lexer.stringValue();
    match(IDENTIFIER);
    match(PUNC_RIGHT_PAREN);
    Convert cvt = new Convert(expr, tempStr);
    cvt.setCacheEvalRst(cacheEvalRst);
    return cvt;
}