Examples with Expr com.pingcap.tidb.tipb.Expr used on opensource projects

Example 1 with Expr

use of com.pingcap.tidb.tipb.Expr in project client-java by tikv.

the class ProtoConverter method scalarToPartialProto.

// Generate protobuf builder with partial data encoded.
// Scalar Signature is left alone
private Expr.Builder scalarToPartialProto(Expression node, Object context) {
    Expr.Builder builder = Expr.newBuilder();
    // Scalar function type
    builder.setTp(ExprType.ScalarFunc);
    // Return type
    builder.setFieldType(toPBFieldType(getType(node)));
    for (Expression child : node.getChildren()) {
        Expr exprProto = child.accept(this, context);
        builder.addChildren(exprProto);
    }
    return builder;
}

Example 2 with Expr

use of com.pingcap.tidb.tipb.Expr in project client-java by tikv.

the class ProtoConverter method visit.

@Override
protected Expr visit(LogicalBinaryExpression node, Object context) {
    ScalarFuncSig protoSig;
    switch(node.getCompType()) {
        case AND:
            protoSig = ScalarFuncSig.LogicalAnd;
            break;
        case OR:
            protoSig = ScalarFuncSig.LogicalOr;
            break;
        case XOR:
            protoSig = ScalarFuncSig.LogicalXor;
            break;
        default:
            throw new TiExpressionException(String.format("Unknown comparison type %s", node.getCompType()));
    }
    Expr.Builder builder = scalarToPartialProto(node, context);
    builder.setSig(protoSig);
    builder.setFieldType(toPBFieldType(getType(node)));
    return builder.build();
}

Example 3 with Expr

use of com.pingcap.tidb.tipb.Expr in project client-java by tikv.

the class ProtoConverter method visit.

@Override
protected Expr visit(ArithmeticBinaryExpression node, Object context) {
    // assume after type coerce, children should be compatible
    Expression child = node.getLeft();
    String typeSignature = getTypeSignature(child);
    ScalarFuncSig protoSig;
    switch(node.getCompType()) {
        // TODO: Add test for bitwise push down
        case BIT_AND:
            protoSig = ScalarFuncSig.BitAndSig;
            break;
        case BIT_OR:
            protoSig = ScalarFuncSig.BitOrSig;
            break;
        case BIT_XOR:
            protoSig = ScalarFuncSig.BitXorSig;
            break;
        case DIVIDE:
            protoSig = ScalarFuncSig.valueOf("Divide" + typeSignature);
            break;
        case MINUS:
            protoSig = ScalarFuncSig.valueOf("Minus" + typeSignature);
            break;
        case MULTIPLY:
            protoSig = ScalarFuncSig.valueOf("Multiply" + typeSignature);
            break;
        case PLUS:
            protoSig = ScalarFuncSig.valueOf("Plus" + typeSignature);
            break;
        default:
            throw new TiExpressionException(String.format("Unknown comparison type %s", node.getCompType()));
    }
    Expr.Builder builder = scalarToPartialProto(node, context);
    builder.setSig(protoSig);
    builder.setFieldType(toPBFieldType(getType(node)));
    return builder.build();
}

Example 4 with Expr

use of com.pingcap.tidb.tipb.Expr in project client-java by tikv.

the class ProtoConverter method visit.

@Override
protected Expr visit(ComparisonBinaryExpression node, Object context) {
    NormalizedPredicate predicate = node.normalize();
    if (predicate.getValue().isOverflowed()) {
        throw new UnsupportedOperationException("overflowed ComparisonBinaryExpression cannot be pushed down");
    }
    Expression child = node.getLeft();
    String typeSignature = getTypeSignature(child);
    ScalarFuncSig protoSig;
    switch(node.getComparisonType()) {
        case EQUAL:
            protoSig = ScalarFuncSig.valueOf("EQ" + typeSignature);
            break;
        case GREATER_EQUAL:
            protoSig = ScalarFuncSig.valueOf("GE" + typeSignature);
            break;
        case GREATER_THAN:
            protoSig = ScalarFuncSig.valueOf("GT" + typeSignature);
            break;
        case LESS_EQUAL:
            protoSig = ScalarFuncSig.valueOf("LE" + typeSignature);
            break;
        case LESS_THAN:
            protoSig = ScalarFuncSig.valueOf("LT" + typeSignature);
            break;
        case NOT_EQUAL:
            protoSig = ScalarFuncSig.valueOf("NE" + typeSignature);
            break;
        default:
            throw new TiExpressionException(String.format("Unknown comparison type %s", node.getComparisonType()));
    }
    Expr.Builder builder = scalarToPartialProto(node, context);
    builder.setSig(protoSig);
    builder.setFieldType(toPBFieldType(getType(node)));
    return builder.build();
}

Example 5 with Expr

use of com.pingcap.tidb.tipb.Expr in project client-java by tikv.

the class ProtoConverter method visit.

@Override
protected Expr visit(FuncCallExpr node, Object context) {
    ScalarFuncSig protoSig = ScalarFuncSig.Year;
    Expr.Builder builder = scalarToPartialProto(node, context);
    builder.setSig(protoSig);
    builder.setFieldType(toPBFieldType(getType(node)));
    return builder.build();
}