Examples with OR org.apache.beam.vendor.calcite.v1_28_0.org.apache.calcite.sql.SqlKind.OR used on opensource projects

Example 21 with OR

use of org.apache.beam.vendor.calcite.v1_28_0.org.apache.calcite.sql.SqlKind.OR in project beam by apache.

the class CalcRelSplitter method createProgramForLevel.

/**
 * Creates a program containing the expressions for a given level.
 *
 * <p>The expression list of the program will consist of all entries in the expression list <code>
 * allExprs[i]</code> for which the corresponding level ordinal <code>exprLevels[i]</code> is
 * equal to <code>level</code>. Expressions are mapped according to <code>inputExprOrdinals</code>
 * .
 *
 * @param level Level ordinal
 * @param levelCount Number of levels
 * @param inputRowType Input row type
 * @param allExprs Array of all expressions
 * @param exprLevels Array of the level ordinal of each expression
 * @param inputExprOrdinals Ordinals in the expression list of input expressions. Input expression
 *     <code>i</code> will be found at position <code>inputExprOrdinals[i]</code>.
 * @param projectExprOrdinals Ordinals of the expressions to be output this level.
 * @param conditionExprOrdinal Ordinal of the expression to form the condition for this level, or
 *     -1 if there is no condition.
 * @param outputRowType Output row type
 * @return Relational expression
 */
private RexProgram createProgramForLevel(int level, int levelCount, RelDataType inputRowType, RexNode[] allExprs, int[] exprLevels, int[] inputExprOrdinals, final int[] projectExprOrdinals, int conditionExprOrdinal, @Nullable RelDataType outputRowType) {
    // Build a list of expressions to form the calc.
    List<RexNode> exprs = new ArrayList<>();
    // exprInverseOrdinals describes where an expression in allExprs comes
    // from -- from an input, from a calculated expression, or -1 if not
    // available at this level.
    int[] exprInverseOrdinals = new int[allExprs.length];
    Arrays.fill(exprInverseOrdinals, -1);
    int j = 0;
    // and are used here.
    for (int i = 0; i < inputExprOrdinals.length; i++) {
        final int inputExprOrdinal = inputExprOrdinals[i];
        exprs.add(new RexInputRef(i, allExprs[inputExprOrdinal].getType()));
        exprInverseOrdinals[inputExprOrdinal] = j;
        ++j;
    }
    // Next populate the computed expressions.
    final RexShuttle shuttle = new InputToCommonExprConverter(exprInverseOrdinals, exprLevels, level, inputExprOrdinals, allExprs);
    for (int i = 0; i < allExprs.length; i++) {
        if (exprLevels[i] == level || exprLevels[i] == -1 && level == (levelCount - 1) && allExprs[i] instanceof RexLiteral) {
            RexNode expr = allExprs[i];
            final RexNode translatedExpr = expr.accept(shuttle);
            exprs.add(translatedExpr);
            assert exprInverseOrdinals[i] == -1;
            exprInverseOrdinals[i] = j;
            ++j;
        }
    }
    // Form the projection and condition list. Project and condition
    // ordinals are offsets into allExprs, so we need to map them into
    // exprs.
    final List<RexLocalRef> projectRefs = new ArrayList<>(projectExprOrdinals.length);
    final List<String> fieldNames = new ArrayList<>(projectExprOrdinals.length);
    for (int i = 0; i < projectExprOrdinals.length; i++) {
        final int projectExprOrdinal = projectExprOrdinals[i];
        final int index = exprInverseOrdinals[projectExprOrdinal];
        assert index >= 0;
        RexNode expr = allExprs[projectExprOrdinal];
        projectRefs.add(new RexLocalRef(index, expr.getType()));
        // Inherit meaningful field name if possible.
        fieldNames.add(deriveFieldName(expr, i));
    }
    RexLocalRef conditionRef;
    if (conditionExprOrdinal >= 0) {
        final int index = exprInverseOrdinals[conditionExprOrdinal];
        conditionRef = new RexLocalRef(index, allExprs[conditionExprOrdinal].getType());
    } else {
        conditionRef = null;
    }
    if (outputRowType == null) {
        outputRowType = RexUtil.createStructType(typeFactory, projectRefs, fieldNames, null);
    }
    final RexProgram program = new RexProgram(inputRowType, exprs, projectRefs, conditionRef, outputRowType);
    // call operands), since literals should be inlined.
    return program;
}