| /******************************************************************************* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| ******************************************************************************/ |
| package org.apache.drill.exec.planner.logical; |
| |
| import com.google.common.base.Function; |
| import com.google.common.collect.ImmutableList; |
| import io.netty.buffer.DrillBuf; |
| import org.apache.drill.common.exceptions.UserException; |
| import org.apache.drill.common.expression.ErrorCollectorImpl; |
| import org.apache.drill.common.expression.ExpressionStringBuilder; |
| import org.apache.drill.common.expression.LogicalExpression; |
| import org.apache.drill.common.types.TypeProtos; |
| import org.apache.drill.exec.expr.ExpressionTreeMaterializer; |
| import org.apache.drill.exec.expr.TypeHelper; |
| import org.apache.drill.exec.expr.fn.FunctionImplementationRegistry; |
| import org.apache.drill.exec.expr.fn.impl.DateUtility; |
| import org.apache.drill.exec.expr.fn.impl.StringFunctionHelpers; |
| import org.apache.drill.exec.expr.fn.interpreter.InterpreterEvaluator; |
| import org.apache.drill.exec.expr.holders.BigIntHolder; |
| import org.apache.drill.exec.expr.holders.BitHolder; |
| import org.apache.drill.exec.expr.holders.DateHolder; |
| import org.apache.drill.exec.expr.holders.Decimal18Holder; |
| import org.apache.drill.exec.expr.holders.Decimal28SparseHolder; |
| import org.apache.drill.exec.expr.holders.Decimal38SparseHolder; |
| import org.apache.drill.exec.expr.holders.Decimal9Holder; |
| import org.apache.drill.exec.expr.holders.Float4Holder; |
| import org.apache.drill.exec.expr.holders.Float8Holder; |
| import org.apache.drill.exec.expr.holders.IntHolder; |
| import org.apache.drill.exec.expr.holders.IntervalDayHolder; |
| import org.apache.drill.exec.expr.holders.IntervalYearHolder; |
| import org.apache.drill.exec.expr.holders.NullableBigIntHolder; |
| import org.apache.drill.exec.expr.holders.NullableBitHolder; |
| import org.apache.drill.exec.expr.holders.NullableDateHolder; |
| import org.apache.drill.exec.expr.holders.NullableDecimal18Holder; |
| import org.apache.drill.exec.expr.holders.NullableDecimal28SparseHolder; |
| import org.apache.drill.exec.expr.holders.NullableDecimal38SparseHolder; |
| import org.apache.drill.exec.expr.holders.NullableDecimal9Holder; |
| import org.apache.drill.exec.expr.holders.NullableFloat4Holder; |
| import org.apache.drill.exec.expr.holders.NullableFloat8Holder; |
| import org.apache.drill.exec.expr.holders.NullableIntHolder; |
| import org.apache.drill.exec.expr.holders.NullableIntervalDayHolder; |
| import org.apache.drill.exec.expr.holders.NullableIntervalYearHolder; |
| import org.apache.drill.exec.expr.holders.NullableTimeHolder; |
| import org.apache.drill.exec.expr.holders.NullableTimeStampHolder; |
| import org.apache.drill.exec.expr.holders.NullableVarCharHolder; |
| import org.apache.drill.exec.expr.holders.TimeHolder; |
| import org.apache.drill.exec.expr.holders.TimeStampHolder; |
| import org.apache.drill.exec.expr.holders.ValueHolder; |
| import org.apache.drill.exec.expr.holders.VarCharHolder; |
| import org.apache.drill.exec.ops.UdfUtilities; |
| import org.apache.calcite.plan.RelOptPlanner; |
| import org.apache.calcite.rel.type.RelDataTypeFactory; |
| import org.apache.calcite.rex.RexBuilder; |
| import org.apache.calcite.rex.RexNode; |
| import org.apache.calcite.sql.type.SqlTypeName; |
| import org.apache.drill.exec.planner.physical.PlannerSettings; |
| import org.apache.drill.exec.planner.sql.TypeInferenceUtils; |
| import org.joda.time.DateTime; |
| import org.joda.time.DateTimeZone; |
| |
| import java.math.BigDecimal; |
| import java.math.BigInteger; |
| import java.util.Calendar; |
| import java.util.List; |
| |
| public class DrillConstExecutor implements RelOptPlanner.Executor { |
| private static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(DrillConstExecutor.class); |
| |
| private final PlannerSettings plannerSettings; |
| |
| // This is a list of all types that cannot be folded at planning time for various reasons, most of the types are |
| // currently not supported at all. The reasons for the others can be found in the evaluation code in the reduce method |
| public static final List<Object> NON_REDUCIBLE_TYPES = ImmutableList.builder().add( |
| // cannot represent this as a literal according to calcite |
| TypeProtos.MinorType.INTERVAL, |
| |
| // TODO - map and list are used in Drill but currently not expressible as literals, these can however be |
| // outputs of functions that take literals as inputs (such as a convert_fromJSON with a literal string |
| // as input), so we need to identify functions with these return types as non-foldable until we have a |
| // literal representation for them |
| TypeProtos.MinorType.MAP, TypeProtos.MinorType.LIST, |
| |
| // TODO - DRILL-2551 - Varbinary is used in execution, but it is missing a literal definition |
| // in the logical expression representation and subsequently is not supported in |
| // RexToDrill and the logical expression visitors |
| TypeProtos.MinorType.VARBINARY, |
| |
| TypeProtos.MinorType.TIMESTAMPTZ, TypeProtos.MinorType.TIMETZ, TypeProtos.MinorType.LATE, |
| TypeProtos.MinorType.TINYINT, TypeProtos.MinorType.SMALLINT, TypeProtos.MinorType.GENERIC_OBJECT, TypeProtos.MinorType.NULL, |
| TypeProtos.MinorType.DECIMAL28DENSE, TypeProtos.MinorType.DECIMAL38DENSE, TypeProtos.MinorType.MONEY, |
| TypeProtos.MinorType.FIXEDBINARY, TypeProtos.MinorType.FIXEDCHAR, TypeProtos.MinorType.FIXED16CHAR, |
| TypeProtos.MinorType.VAR16CHAR, TypeProtos.MinorType.UINT1, TypeProtos.MinorType.UINT2, TypeProtos.MinorType.UINT4, |
| TypeProtos.MinorType.UINT8) |
| .build(); |
| |
| FunctionImplementationRegistry funcImplReg; |
| UdfUtilities udfUtilities; |
| |
| public DrillConstExecutor(FunctionImplementationRegistry funcImplReg, UdfUtilities udfUtilities, PlannerSettings plannerSettings) { |
| this.funcImplReg = funcImplReg; |
| this.udfUtilities = udfUtilities; |
| this.plannerSettings = plannerSettings; |
| } |
| |
| @Override |
| public void reduce(final RexBuilder rexBuilder, List<RexNode> constExps, final List<RexNode> reducedValues) { |
| for (final RexNode newCall : constExps) { |
| LogicalExpression logEx = DrillOptiq.toDrill(new DrillParseContext(plannerSettings), null /* input rel */, newCall); |
| |
| ErrorCollectorImpl errors = new ErrorCollectorImpl(); |
| final LogicalExpression materializedExpr = ExpressionTreeMaterializer.materialize(logEx, null, errors, funcImplReg); |
| if (errors.getErrorCount() != 0) { |
| String message = String.format( |
| "Failure while materializing expression in constant expression evaluator [%s]. Errors: %s", |
| newCall.toString(), errors.toString()); |
| throw UserException.planError() |
| .message(message) |
| .build(logger); |
| } |
| |
| if (NON_REDUCIBLE_TYPES.contains(materializedExpr.getMajorType().getMinorType())) { |
| logger.debug("Constant expression not folded due to return type {}, complete expression: {}", |
| materializedExpr.getMajorType(), |
| ExpressionStringBuilder.toString(materializedExpr)); |
| reducedValues.add(newCall); |
| continue; |
| } |
| |
| ValueHolder output = InterpreterEvaluator.evaluateConstantExpr(udfUtilities, materializedExpr); |
| final RelDataTypeFactory typeFactory = rexBuilder.getTypeFactory(); |
| |
| if (materializedExpr.getMajorType().getMode() == TypeProtos.DataMode.OPTIONAL && TypeHelper.isNull(output)) { |
| SqlTypeName sqlTypeName = TypeInferenceUtils.getCalciteTypeFromDrillType(materializedExpr.getMajorType().getMinorType()); |
| if (sqlTypeName == null) { |
| String message = String.format("Error reducing constant expression, unsupported type: %s.", |
| materializedExpr.getMajorType().getMinorType()); |
| throw UserException.unsupportedError() |
| .message(message) |
| .build(logger); |
| } |
| reducedValues.add(rexBuilder.makeNullLiteral(sqlTypeName)); |
| continue; |
| } |
| |
| Function<ValueHolder, RexNode> literator = new Function<ValueHolder, RexNode>() { |
| @Override |
| public RexNode apply(ValueHolder output) { |
| switch(materializedExpr.getMajorType().getMinorType()) { |
| case INT: { |
| int value = (materializedExpr.getMajorType().getMode() == TypeProtos.DataMode.OPTIONAL) ? |
| ((NullableIntHolder) output).value : ((IntHolder) output).value; |
| return rexBuilder.makeLiteral(new BigDecimal(value), |
| TypeInferenceUtils.createCalciteTypeWithNullability(typeFactory, SqlTypeName.INTEGER, newCall.getType().isNullable()), false); |
| } |
| case BIGINT: { |
| long value = (materializedExpr.getMajorType().getMode() == TypeProtos.DataMode.OPTIONAL) ? |
| ((NullableBigIntHolder) output).value : ((BigIntHolder) output).value; |
| return rexBuilder.makeLiteral(new BigDecimal(value), |
| TypeInferenceUtils.createCalciteTypeWithNullability(typeFactory, SqlTypeName.BIGINT, newCall.getType().isNullable()), false); |
| } |
| case FLOAT4: { |
| float value = (materializedExpr.getMajorType().getMode() == TypeProtos.DataMode.OPTIONAL) ? |
| ((NullableFloat4Holder) output).value : ((Float4Holder) output).value; |
| return rexBuilder.makeLiteral(new BigDecimal(value), |
| TypeInferenceUtils.createCalciteTypeWithNullability(typeFactory, SqlTypeName.FLOAT, newCall.getType().isNullable()), false); |
| } |
| case FLOAT8: { |
| double value = (materializedExpr.getMajorType().getMode() == TypeProtos.DataMode.OPTIONAL) ? |
| ((NullableFloat8Holder) output).value : ((Float8Holder) output).value; |
| return rexBuilder.makeLiteral(new BigDecimal(value), |
| TypeInferenceUtils.createCalciteTypeWithNullability(typeFactory, SqlTypeName.DOUBLE, newCall.getType().isNullable()), false); |
| } |
| case VARCHAR: { |
| String value = (materializedExpr.getMajorType().getMode() == TypeProtos.DataMode.OPTIONAL) ? |
| StringFunctionHelpers.getStringFromVarCharHolder((NullableVarCharHolder)output) : |
| StringFunctionHelpers.getStringFromVarCharHolder((VarCharHolder)output); |
| return rexBuilder.makeLiteral(value, |
| TypeInferenceUtils.createCalciteTypeWithNullability(typeFactory, SqlTypeName.VARCHAR, newCall.getType().isNullable()), false); |
| } |
| case BIT: { |
| boolean value = (materializedExpr.getMajorType().getMode() == TypeProtos.DataMode.OPTIONAL) ? |
| ((NullableBitHolder) output).value == 1 : ((BitHolder) output).value == 1; |
| return rexBuilder.makeLiteral(value, |
| TypeInferenceUtils.createCalciteTypeWithNullability(typeFactory, SqlTypeName.BOOLEAN, newCall.getType().isNullable()), false); |
| } |
| case DATE: { |
| Calendar value = (materializedExpr.getMajorType().getMode() == TypeProtos.DataMode.OPTIONAL) ? |
| new DateTime(((NullableDateHolder) output).value, DateTimeZone.UTC).toCalendar(null) : |
| new DateTime(((DateHolder) output).value, DateTimeZone.UTC).toCalendar(null); |
| return rexBuilder.makeLiteral(value, |
| TypeInferenceUtils.createCalciteTypeWithNullability(typeFactory, SqlTypeName.DATE, newCall.getType().isNullable()), false); |
| } |
| case DECIMAL9: { |
| long value; |
| int scale; |
| if (materializedExpr.getMajorType().getMode() == TypeProtos.DataMode.OPTIONAL) { |
| NullableDecimal9Holder decimal9Out = (NullableDecimal9Holder)output; |
| value = decimal9Out.value; |
| scale = decimal9Out.scale; |
| } else { |
| Decimal9Holder decimal9Out = (Decimal9Holder)output; |
| value = decimal9Out.value; |
| scale = decimal9Out.scale; |
| } |
| return rexBuilder.makeLiteral( |
| new BigDecimal(BigInteger.valueOf(value), scale), |
| TypeInferenceUtils.createCalciteTypeWithNullability(typeFactory, SqlTypeName.DECIMAL, newCall.getType().isNullable()), |
| false); |
| } |
| case DECIMAL18: { |
| long value; |
| int scale; |
| if (materializedExpr.getMajorType().getMode() == TypeProtos.DataMode.OPTIONAL) { |
| NullableDecimal18Holder decimal18Out = (NullableDecimal18Holder)output; |
| value = decimal18Out.value; |
| scale = decimal18Out.scale; |
| } else { |
| Decimal18Holder decimal18Out = (Decimal18Holder)output; |
| value = decimal18Out.value; |
| scale = decimal18Out.scale; |
| } |
| return rexBuilder.makeLiteral( |
| new BigDecimal(BigInteger.valueOf(value), scale), |
| TypeInferenceUtils.createCalciteTypeWithNullability(typeFactory, SqlTypeName.DECIMAL, newCall.getType().isNullable()), |
| false); |
| } |
| case DECIMAL28SPARSE: { |
| DrillBuf buffer; |
| int start; |
| int scale; |
| if (materializedExpr.getMajorType().getMode() == TypeProtos.DataMode.OPTIONAL) { |
| NullableDecimal28SparseHolder decimal28Out = (NullableDecimal28SparseHolder)output; |
| buffer = decimal28Out.buffer; |
| start = decimal28Out.start; |
| scale = decimal28Out.scale; |
| } else { |
| Decimal28SparseHolder decimal28Out = (Decimal28SparseHolder)output; |
| buffer = decimal28Out.buffer; |
| start = decimal28Out.start; |
| scale = decimal28Out.scale; |
| } |
| return rexBuilder.makeLiteral( |
| org.apache.drill.exec.util.DecimalUtility.getBigDecimalFromSparse(buffer, start * 20, 5, scale), |
| TypeInferenceUtils.createCalciteTypeWithNullability(typeFactory, SqlTypeName.DECIMAL, newCall.getType().isNullable()), false); |
| } |
| case DECIMAL38SPARSE: { |
| DrillBuf buffer; |
| int start; |
| int scale; |
| if (materializedExpr.getMajorType().getMode() == TypeProtos.DataMode.OPTIONAL) { |
| NullableDecimal38SparseHolder decimal38Out = (NullableDecimal38SparseHolder)output; |
| buffer = decimal38Out.buffer; |
| start = decimal38Out.start; |
| scale = decimal38Out.scale; |
| } else { |
| Decimal38SparseHolder decimal38Out = (Decimal38SparseHolder)output; |
| buffer = decimal38Out.buffer; |
| start = decimal38Out.start; |
| scale = decimal38Out.scale; |
| } |
| return rexBuilder.makeLiteral(org.apache.drill.exec.util.DecimalUtility.getBigDecimalFromSparse(buffer, start * 24, 6, scale), |
| TypeInferenceUtils.createCalciteTypeWithNullability(typeFactory, SqlTypeName.DECIMAL, newCall.getType().isNullable()), |
| false); |
| } |
| case TIME: { |
| Calendar value = (materializedExpr.getMajorType().getMode() == TypeProtos.DataMode.OPTIONAL) ? |
| new DateTime(((NullableTimeHolder) output).value, DateTimeZone.UTC).toCalendar(null) : |
| new DateTime(((TimeHolder) output).value, DateTimeZone.UTC).toCalendar(null); |
| return rexBuilder.makeLiteral(value, |
| TypeInferenceUtils.createCalciteTypeWithNullability(typeFactory, SqlTypeName.TIME, newCall.getType().isNullable()), false); |
| } |
| case TIMESTAMP: { |
| Calendar value = (materializedExpr.getMajorType().getMode() == TypeProtos.DataMode.OPTIONAL) ? |
| new DateTime(((NullableTimeStampHolder) output).value, DateTimeZone.UTC).toCalendar(null) : |
| new DateTime(((TimeStampHolder) output).value, DateTimeZone.UTC).toCalendar(null); |
| return rexBuilder.makeLiteral(value, |
| TypeInferenceUtils.createCalciteTypeWithNullability(typeFactory, SqlTypeName.TIMESTAMP, newCall.getType().isNullable()), false); |
| } |
| case INTERVALYEAR: { |
| BigDecimal value = (materializedExpr.getMajorType().getMode() == TypeProtos.DataMode.OPTIONAL) ? |
| new BigDecimal(((NullableIntervalYearHolder) output).value) : |
| new BigDecimal(((IntervalYearHolder) output).value); |
| return rexBuilder.makeLiteral(value, |
| TypeInferenceUtils.createCalciteTypeWithNullability(typeFactory, SqlTypeName.INTERVAL_YEAR_MONTH, newCall.getType().isNullable()), false); |
| } |
| case INTERVALDAY: { |
| int days; |
| int milliseconds; |
| if (materializedExpr.getMajorType().getMode() == TypeProtos.DataMode.OPTIONAL) { |
| NullableIntervalDayHolder intervalDayOut = (NullableIntervalDayHolder) output; |
| days = intervalDayOut.days; |
| milliseconds = intervalDayOut.milliseconds; |
| } else { |
| IntervalDayHolder intervalDayOut = (IntervalDayHolder) output; |
| days = intervalDayOut.days; |
| milliseconds = intervalDayOut.milliseconds; |
| } |
| return rexBuilder.makeLiteral( |
| new BigDecimal(days * DateUtility.daysToStandardMillis + milliseconds), |
| TypeInferenceUtils.createCalciteTypeWithNullability(typeFactory, SqlTypeName.INTERVAL_DAY_TIME, newCall.getType().isNullable()), |
| false); |
| } |
| // The list of known unsupported types is used to trigger this behavior of re-using the input expression |
| // before the expression is even attempted to be evaluated, this is just here as a last precaution a |
| // as new types may be added in the future. |
| default: |
| logger.debug("Constant expression not folded due to return type {}, complete expression: {}", |
| materializedExpr.getMajorType(), |
| ExpressionStringBuilder.toString(materializedExpr)); |
| return newCall; |
| } |
| } |
| }; |
| |
| reducedValues.add(literator.apply(output)); |
| } |
| } |
| } |
| |
| |
