Examples with ParameterValueExpression org.voltdb.expressions.ParameterValueExpression used on opensource projects

Example 16 with ParameterValueExpression

use of org.voltdb.expressions.ParameterValueExpression in project voltdb by VoltDB.

the class AbstractParsedStmt method producesOneRowOutput.

// Function evaluates whether the statement results in at most
// one output row. This is implemented for single table by checking
// value equivalence of predicates in where clause and checking
// if all defined unique indexes are in value equivalence set.
// Returns true if the statement results is at most one output
// row else false
protected boolean producesOneRowOutput() {
    if (m_tableAliasMap.size() != 1) {
        return false;
    }
    // Get the table.  There's only one.
    StmtTableScan scan = m_tableAliasMap.values().iterator().next();
    Table table = getTableFromDB(scan.getTableName());
    // May be sub-query? If can't find the table there's no use to continue.
    if (table == null) {
        return false;
    }
    // Get all the indexes defined on the table
    CatalogMap<Index> indexes = table.getIndexes();
    if (indexes == null || indexes.size() == 0) {
        // no indexes defined on the table
        return false;
    }
    // Collect value equivalence expression for the SQL statement
    HashMap<AbstractExpression, Set<AbstractExpression>> valueEquivalence = analyzeValueEquivalence();
    // If no value equivalence filter defined in SQL statement, there's no use to continue
    if (valueEquivalence.isEmpty()) {
        return false;
    }
    // Collect all tve expressions from value equivalence set which have equivalence
    // defined to parameterized or constant value expression.
    // Eg: T.A = ? or T.A = 1
    Set<AbstractExpression> parameterizedConstantKeys = new HashSet<>();
    // get all the keys
    Set<AbstractExpression> valueEquivalenceKeys = valueEquivalence.keySet();
    for (AbstractExpression key : valueEquivalenceKeys) {
        if (key instanceof TupleValueExpression) {
            Set<AbstractExpression> values = valueEquivalence.get(key);
            for (AbstractExpression value : values) {
                if ((value instanceof ParameterValueExpression) || (value instanceof ConstantValueExpression)) {
                    TupleValueExpression tve = (TupleValueExpression) key;
                    parameterizedConstantKeys.add(tve);
                }
            }
        }
    }
    // index defined on table appears in tve equivalence expression gathered above.
    for (Index index : indexes) {
        // Perform lookup only on pure column indices which are unique
        if (!index.getUnique() || !index.getExpressionsjson().isEmpty()) {
            continue;
        }
        Set<AbstractExpression> indexExpressions = new HashSet<>();
        CatalogMap<ColumnRef> indexColRefs = index.getColumns();
        for (ColumnRef indexColRef : indexColRefs) {
            Column col = indexColRef.getColumn();
            TupleValueExpression tve = new TupleValueExpression(scan.getTableName(), scan.getTableAlias(), col.getName(), col.getName(), col.getIndex());
            indexExpressions.add(tve);
        }
        if (parameterizedConstantKeys.containsAll(indexExpressions)) {
            return true;
        }
    }
    return false;
}

Example 17 with ParameterValueExpression

use of org.voltdb.expressions.ParameterValueExpression in project voltdb by VoltDB.

the class CompiledPlan method setParamIndexes.

// A reusable step extracted from boundParamIndexes so it can be applied to two different
// sources of bindings, IndexScans and IndexCounts.
private static void setParamIndexes(BitSet ints, List<AbstractExpression> params) {
    for (AbstractExpression ae : params) {
        assert (ae instanceof ParameterValueExpression);
        ParameterValueExpression pve = (ParameterValueExpression) ae;
        int param = pve.getParameterIndex();
        ints.set(param);
    }
}

Example 18 with ParameterValueExpression

use of org.voltdb.expressions.ParameterValueExpression in project voltdb by VoltDB.

the class CompiledPlan method parameterTypes.

// This is assumed to be called only after parameters has been fully initialized.
public VoltType[] parameterTypes() {
    if (m_parameterTypes == null) {
        m_parameterTypes = new VoltType[parameters.length];
        int ii = 0;
        for (ParameterValueExpression param : parameters) {
            m_parameterTypes[ii++] = param.getValueType();
        }
    }
    return m_parameterTypes;
}

Example 19 with ParameterValueExpression

use of org.voltdb.expressions.ParameterValueExpression in project voltdb by VoltDB.

the class TestScanPlanNode method testOutputSchemaOverriddenProjection.

// test that if someone provides their own inline projection
// that the output schema of the scan node consists of the output
// schema of the projection.  Updates will do this so that the
// inlined projection fills the values of the output tuples correctly
// before it attempts to update them
public void testOutputSchemaOverriddenProjection() {
    AbstractScanPlanNode dut = new SeqScanPlanNode(TABLE1, TABLE1);
    // Create an output schema like we might see for an inlined projection
    // generated for update.  We'll have 4 output columns, the first will
    // be the tuple address, the second one a parameter expression, next
    // will be a constant, and the other will be a more complex expression
    // that uses some TVEs.
    NodeSchema proj_schema = new NodeSchema();
    String[] cols = new String[4];
    TupleAddressExpression col1_exp = new TupleAddressExpression();
    proj_schema.addColumn("", "", "tuple_address", "tuple_address", col1_exp);
    cols[0] = "tuple_address";
    // update column 1 with a parameter value
    ParameterValueExpression col2_exp = new ParameterValueExpression();
    col2_exp.setParameterIndex(0);
    col2_exp.setValueType(COLTYPES[1]);
    col2_exp.setValueSize(COLTYPES[1].getLengthInBytesForFixedTypes());
    // XXX I'm not sure what to do with the name for the updated column yet.
    // I think it should be an alias and not the original table name/col name
    proj_schema.addColumn(TABLE1, TABLE1, COLS[1], COLS[1], col2_exp);
    cols[1] = COLS[1];
    // Update column 3 with a constant value
    ConstantValueExpression col3_exp = new ConstantValueExpression();
    col3_exp.setValueType(COLTYPES[3]);
    col3_exp.setValueSize(COLTYPES[3].getLengthInBytesForFixedTypes());
    col3_exp.setValue("3.14159");
    proj_schema.addColumn(TABLE1, TABLE1, COLS[3], COLS[3], col3_exp);
    cols[2] = COLS[3];
    // update column 4 with a sum of columns 0 and 2
    OperatorExpression col4_exp = new OperatorExpression();
    col4_exp.setValueType(COLTYPES[4]);
    col4_exp.setValueSize(COLTYPES[4].getLengthInBytesForFixedTypes());
    col4_exp.setExpressionType(ExpressionType.OPERATOR_PLUS);
    TupleValueExpression left = new TupleValueExpression(TABLE1, TABLE1, COLS[0], COLS[0], 0);
    left.setValueType(COLTYPES[0]);
    left.setValueSize(COLTYPES[0].getLengthInBytesForFixedTypes());
    TupleValueExpression right = new TupleValueExpression(TABLE1, TABLE1, COLS[2], COLS[2], 0);
    right.setValueType(COLTYPES[2]);
    right.setValueSize(COLTYPES[2].getLengthInBytesForFixedTypes());
    col4_exp.setLeft(left);
    col4_exp.setRight(right);
    proj_schema.addColumn(TABLE1, TABLE1, COLS[4], "C1", col4_exp);
    cols[3] = COLS[4];
    ProjectionPlanNode proj_node = new ProjectionPlanNode(proj_schema);
    dut.addInlinePlanNode(proj_node);
    System.out.println("ProjSchema: " + proj_schema.toString());
    dut.generateOutputSchema(m_voltdb.getDatabase());
    NodeSchema dut_schema = dut.getOutputSchema();
    System.out.println(dut_schema.toString());
    for (int i = 0; i < cols.length; i++) {
        SchemaColumn col = null;
        if (i == 0) {
            col = dut_schema.find("", "", cols[i], cols[i]);
        } else {
            col = dut_schema.find(TABLE1, TABLE1, cols[i], cols[i]);
        }
        assertNotNull(col);
        assertEquals(col.getExpression().getExpressionType(), ExpressionType.VALUE_TUPLE);
    }
}

Example 20 with ParameterValueExpression

use of org.voltdb.expressions.ParameterValueExpression in project voltdb by VoltDB.

the class AbstractParsedStmt method toString.

@Override
public String toString() {
    String retval = "SQL:\n\t" + m_sql + "\n";
    retval += "PARAMETERS:\n\t";
    for (Map.Entry<Integer, ParameterValueExpression> paramEntry : m_paramsByIndex.entrySet()) {
        retval += paramEntry.getValue().toString() + " ";
    }
    retval += "\nTABLE SOURCES:\n\t";
    for (Table table : m_tableList) {
        retval += table.getTypeName() + " ";
    }
    retval += "\nSCAN COLUMNS:\n";
    boolean hasAll = true;
    for (StmtTableScan tableScan : m_tableAliasMap.values()) {
        List<SchemaColumn> scanColumns = tableScan.getScanColumns();
        if (scanColumns.isEmpty()) {
            continue;
        }
        hasAll = false;
        retval += "\tTable Alias: " + tableScan.getTableAlias() + ":\n";
        for (SchemaColumn col : scanColumns) {
            retval += "\t\tColumn: " + col.getColumnName() + ": ";
            retval += col.getExpression().toString() + "\n";
        }
    }
    if (hasAll) {
        retval += "\tALL\n";
    }
    retval += "\nJOIN TREE :\n";
    if (m_joinTree != null) {
        retval += m_joinTree.toString();
    }
    retval += "NO TABLE SELECTION LIST:\n";
    int i = 0;
    for (AbstractExpression expr : m_noTableSelectionList) {
        retval += "\t(" + String.valueOf(i++) + ") " + expr.toString() + "\n";
    }
    return retval;
}