Examples with Project org.apache.calcite.rel.core.Project used on opensource projects

Example 26 with Project

use of org.apache.calcite.rel.core.Project in project drill by axbaretto.

the class TopProjectVisitor method addTopProjectPrel.

/**
 * Adds top project to ensure final output field names are preserved.
 * In case of duplicated column names, will rename duplicates.
 * Top project will be added only if top project is non-trivial and
 * child physical relational node is not project.
 *
 * @param prel physical relational node
 * @param validatedRowType final output row type
 * @return physical relational node with top project if necessary
 */
private Prel addTopProjectPrel(Prel prel, RelDataType validatedRowType) {
    RelDataType rowType = prel.getRowType();
    if (rowType.getFieldCount() != validatedRowType.getFieldCount()) {
        return prel;
    }
    RexBuilder rexBuilder = prel.getCluster().getRexBuilder();
    List<RexNode> projections = new ArrayList<>();
    int projectCount = rowType.getFieldList().size();
    for (int i = 0; i < projectCount; i++) {
        projections.add(rexBuilder.makeInputRef(prel, i));
    }
    List<String> fieldNames = SqlValidatorUtil.uniquify(validatedRowType.getFieldNames(), SqlValidatorUtil.EXPR_SUGGESTER, prel.getCluster().getTypeFactory().getTypeSystem().isSchemaCaseSensitive());
    RelDataType newRowType = RexUtil.createStructType(prel.getCluster().getTypeFactory(), projections, fieldNames, null);
    ProjectPrel topProject = new ProjectPrel(prel.getCluster(), prel.getTraitSet(), prel, projections, newRowType, // outputProj = true : NONE -> OK_NEW_SCHEMA, also handle expression with NULL type.
    true);
    if (prel instanceof Project && DrillRelOptUtil.isTrivialProject(topProject, true)) {
        return new ProjectPrel(prel.getCluster(), prel.getTraitSet(), ((Project) prel).getInput(), ((Project) prel).getProjects(), prel.getRowType(), // outputProj = true : NONE -> OK_NEW_SCHEMA, also handle expression with NULL type.
        true);
    } else {
        return topProject;
    }
}

Example 27 with Project

use of org.apache.calcite.rel.core.Project in project drill by apache.

the class TopProjectVisitor method addTopProjectPrel.

/**
 * Adds top project to ensure final output field names are preserved.
 * In case of duplicated column names, will rename duplicates.
 * Top project will be added only if top project is non-trivial and
 * child physical relational node is not project.
 *
 * @param prel physical relational node
 * @param validatedRowType final output row type
 * @return physical relational node with top project if necessary
 */
private Prel addTopProjectPrel(Prel prel, RelDataType validatedRowType) {
    RelDataType rowType = prel.getRowType();
    if (rowType.getFieldCount() != validatedRowType.getFieldCount()) {
        return prel;
    }
    RexBuilder rexBuilder = prel.getCluster().getRexBuilder();
    List<RexNode> projections = new ArrayList<>();
    int projectCount = rowType.getFieldList().size();
    for (int i = 0; i < projectCount; i++) {
        projections.add(rexBuilder.makeInputRef(prel, i));
    }
    List<String> fieldNames = SqlValidatorUtil.uniquify(validatedRowType.getFieldNames(), SqlValidatorUtil.EXPR_SUGGESTER, prel.getCluster().getTypeFactory().getTypeSystem().isSchemaCaseSensitive());
    RelDataType newRowType = RexUtil.createStructType(prel.getCluster().getTypeFactory(), projections, fieldNames, null);
    ProjectPrel topProject = new ProjectPrel(prel.getCluster(), prel.getTraitSet(), prel, projections, newRowType, // outputProj = true : NONE -> OK_NEW_SCHEMA, also handle expression with NULL type.
    true);
    if (prel instanceof Project && DrillRelOptUtil.isTrivialProject(topProject, true)) {
        return new ProjectPrel(prel.getCluster(), prel.getTraitSet(), ((Project) prel).getInput(), ((Project) prel).getProjects(), prel.getRowType(), // outputProj = true : NONE -> OK_NEW_SCHEMA, also handle expression with NULL type.
        true);
    } else {
        return topProject;
    }
}

Example 28 with Project

use of org.apache.calcite.rel.core.Project in project drill by apache.

the class DrillRelOptUtil method isProjectFlatten.

@SuppressWarnings("deprecation")
public static boolean isProjectFlatten(RelNode project) {
    assert project instanceof Project : "Rel is NOT an instance of project!";
    for (RexNode rex : project.getChildExps()) {
        if (rex instanceof RexCall) {
            RexCall function = (RexCall) rex;
            String functionName = function.getOperator().getName();
            if (functionName.equalsIgnoreCase("flatten")) {
                return true;
            }
        }
    }
    return false;
}

Example 29 with Project

use of org.apache.calcite.rel.core.Project in project drill by apache.

the class DrillMergeProjectRule method matches.

@Override
public boolean matches(RelOptRuleCall call) {
    Project topProject = call.rel(0);
    Project bottomProject = call.rel(1);
    // We have a complex output type do not fire the merge project rule
    if (checkComplexOutput(topProject) || checkComplexOutput(bottomProject)) {
        return false;
    }
    return true;
}

Example 30 with Project

use of org.apache.calcite.rel.core.Project in project drill by apache.

the class DrillProjectRule method onMatch.

@Override
public void onMatch(RelOptRuleCall call) {
    final Project project = call.rel(0);
    final RelNode input = project.getInput();
    final RelTraitSet traits = project.getTraitSet().plus(DrillRel.DRILL_LOGICAL);
    final RelNode convertedInput = convert(input, input.getTraitSet().plus(DrillRel.DRILL_LOGICAL).simplify());
    call.transformTo(new DrillProjectRel(project.getCluster(), traits, convertedInput, project.getProjects(), project.getRowType()));
}