Java Code Examples for org.apache.calcite.rex.RexBuilder#makeCast()
The following examples show how to use
org.apache.calcite.rex.RexBuilder#makeCast() .
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Example 1
| Source File: ClassRowTypeCache.java From mat-calcite-plugin with Apache License 2.0 | 6 votes |
|
@Override
public RexNode apply(RexBuilderContext context) {
RelOptCluster cluster = context.getCluster();
RelDataTypeFactory typeFactory = cluster.getTypeFactory();
final SqlFunction UDF =
new SqlUserDefinedFunction(
new SqlIdentifier("RESOLVE_SIMPLE", SqlParserPos.ZERO),
ReturnTypes.explicit(typeFactory.createJavaType(Object.class)),
null,
OperandTypes.ANY_ANY,
ImmutableList.of(typeFactory.createTypeWithNullability(typeFactory.createJavaType(IObject.class), false),
typeFactory.createJavaType(int.class)),
ScalarFunctionImpl.create(IObjectMethods.class, "resolveSimpleValue"));
RexBuilder b = context.getBuilder();
RexNode rexNode = b.makeCall(UDF, context.getIObject(), b.makeLiteral(name));
return b.makeCast(dataType, rexNode);
}
Example 2
| Source File: StandardConvertletTable.java From Bats with Apache License 2.0 | 5 votes |
|
/**
* Casts a RexNode value to the validated type of a SqlCall. If the value
* was already of the validated type, then the value is returned without an
* additional cast.
*/
public static RexNode castToValidatedType(SqlNode node, RexNode e,
SqlValidator validator, RexBuilder rexBuilder) {
final RelDataType type = validator.getValidatedNodeType(node);
if (e.getType() == type) {
return e;
}
return rexBuilder.makeCast(type, e);
}
Example 3
| Source File: StandardConvertletTable.java From calcite with Apache License 2.0 | 5 votes |
|
/**
* Casts a RexNode value to the validated type of a SqlCall. If the value
* was already of the validated type, then the value is returned without an
* additional cast.
*/
public static RexNode castToValidatedType(SqlNode node, RexNode e,
SqlValidator validator, RexBuilder rexBuilder) {
final RelDataType type = validator.getValidatedNodeType(node);
if (e.getType() == type) {
return e;
}
return rexBuilder.makeCast(type, e);
}
Example 4
| Source File: AggregateReduceFunctionsRule.java From Bats with Apache License 2.0 | 4 votes |
|
private RexNode reduceAvg(
Aggregate oldAggRel,
AggregateCall oldCall,
List<AggregateCall> newCalls,
Map<AggregateCall, RexNode> aggCallMapping,
List<RexNode> inputExprs) {
final int nGroups = oldAggRel.getGroupCount();
final RexBuilder rexBuilder = oldAggRel.getCluster().getRexBuilder();
final int iAvgInput = oldCall.getArgList().get(0);
final RelDataType avgInputType =
getFieldType(
oldAggRel.getInput(),
iAvgInput);
final AggregateCall sumCall =
AggregateCall.create(SqlStdOperatorTable.SUM,
oldCall.isDistinct(),
oldCall.isApproximate(),
oldCall.getArgList(),
oldCall.filterArg,
oldCall.collation,
oldAggRel.getGroupCount(),
oldAggRel.getInput(),
null,
null);
final AggregateCall countCall =
AggregateCall.create(SqlStdOperatorTable.COUNT,
oldCall.isDistinct(),
oldCall.isApproximate(),
oldCall.getArgList(),
oldCall.filterArg,
oldCall.collation,
oldAggRel.getGroupCount(),
oldAggRel.getInput(),
null,
null);
// NOTE: these references are with respect to the output
// of newAggRel
RexNode numeratorRef =
rexBuilder.addAggCall(sumCall,
nGroups,
oldAggRel.indicator,
newCalls,
aggCallMapping,
ImmutableList.of(avgInputType));
final RexNode denominatorRef =
rexBuilder.addAggCall(countCall,
nGroups,
oldAggRel.indicator,
newCalls,
aggCallMapping,
ImmutableList.of(avgInputType));
final RelDataTypeFactory typeFactory = oldAggRel.getCluster().getTypeFactory();
final RelDataType avgType = typeFactory.createTypeWithNullability(
oldCall.getType(), numeratorRef.getType().isNullable());
numeratorRef = rexBuilder.ensureType(avgType, numeratorRef, true);
final RexNode divideRef =
rexBuilder.makeCall(SqlStdOperatorTable.DIVIDE, numeratorRef, denominatorRef);
return rexBuilder.makeCast(oldCall.getType(), divideRef);
}
Example 5
| Source File: AggregateReduceFunctionsRule.java From Bats with Apache License 2.0 | 4 votes |
|
private RexNode reduceRegrSzz(
Aggregate oldAggRel,
AggregateCall oldCall,
List<AggregateCall> newCalls,
Map<AggregateCall, RexNode> aggCallMapping,
List<RexNode> inputExprs,
int xIndex,
int yIndex,
int nullFilterIndex) {
// regr_sxx(x, y) ==>
// sum(y * y, x) - sum(y, x) * sum(y, x) / regr_count(x, y)
//
final RelOptCluster cluster = oldAggRel.getCluster();
final RexBuilder rexBuilder = cluster.getRexBuilder();
final RelDataTypeFactory typeFactory = cluster.getTypeFactory();
final RelDataType argXType = getFieldType(oldAggRel.getInput(), xIndex);
final RelDataType argYType =
xIndex == yIndex ? argXType : getFieldType(oldAggRel.getInput(), yIndex);
final RelDataType nullFilterIndexType =
nullFilterIndex == yIndex ? argYType : getFieldType(oldAggRel.getInput(), yIndex);
final RelDataType oldCallType =
typeFactory.createTypeWithNullability(oldCall.getType(),
argXType.isNullable() || argYType.isNullable() || nullFilterIndexType.isNullable());
final RexNode argX =
rexBuilder.ensureType(oldCallType, inputExprs.get(xIndex), true);
final RexNode argY =
rexBuilder.ensureType(oldCallType, inputExprs.get(yIndex), true);
final RexNode argNullFilter =
rexBuilder.ensureType(oldCallType, inputExprs.get(nullFilterIndex), true);
final RexNode argXArgY = rexBuilder.makeCall(SqlStdOperatorTable.MULTIPLY, argX, argY);
final int argSquaredOrdinal = lookupOrAdd(inputExprs, argXArgY);
final RexNode argXAndYNotNullFilter = rexBuilder.makeCall(SqlStdOperatorTable.AND,
rexBuilder.makeCall(SqlStdOperatorTable.AND,
rexBuilder.makeCall(SqlStdOperatorTable.IS_NOT_NULL, argX),
rexBuilder.makeCall(SqlStdOperatorTable.IS_NOT_NULL, argY)),
rexBuilder.makeCall(SqlStdOperatorTable.IS_NOT_NULL, argNullFilter));
final int argXAndYNotNullFilterOrdinal = lookupOrAdd(inputExprs, argXAndYNotNullFilter);
final RexNode sumXY = getSumAggregatedRexNodeWithBinding(
oldAggRel, oldCall, newCalls, aggCallMapping, argXArgY.getType(),
argSquaredOrdinal, argXAndYNotNullFilterOrdinal);
final RexNode sumXYCast = rexBuilder.ensureType(oldCallType, sumXY, true);
final RexNode sumX = getSumAggregatedRexNode(oldAggRel, oldCall,
newCalls, aggCallMapping, rexBuilder, xIndex, argXAndYNotNullFilterOrdinal);
final RexNode sumY = xIndex == yIndex
? sumX
: getSumAggregatedRexNode(oldAggRel, oldCall, newCalls,
aggCallMapping, rexBuilder, yIndex, argXAndYNotNullFilterOrdinal);
final RexNode sumXSumY = rexBuilder.makeCall(SqlStdOperatorTable.MULTIPLY, sumX, sumY);
final RexNode countArg = getRegrCountRexNode(oldAggRel, oldCall, newCalls, aggCallMapping,
ImmutableIntList.of(xIndex), ImmutableList.of(argXType), argXAndYNotNullFilterOrdinal);
RexLiteral zero = rexBuilder.makeExactLiteral(BigDecimal.ZERO);
RexNode nul = rexBuilder.constantNull();
final RexNode avgSumXSumY = rexBuilder.makeCall(SqlStdOperatorTable.CASE,
rexBuilder.makeCall(SqlStdOperatorTable.EQUALS, countArg, zero), nul,
rexBuilder.makeCall(SqlStdOperatorTable.DIVIDE, sumXSumY, countArg));
final RexNode avgSumXSumYCast = rexBuilder.ensureType(oldCallType, avgSumXSumY, true);
final RexNode result =
rexBuilder.makeCall(SqlStdOperatorTable.MINUS, sumXYCast, avgSumXSumYCast);
return rexBuilder.makeCast(oldCall.getType(), result);
}
Example 6
| Source File: SqlNodeToRexConverterImpl.java From Bats with Apache License 2.0 | 4 votes |
|
public RexNode convertLiteral(
SqlRexContext cx,
SqlLiteral literal) {
RexBuilder rexBuilder = cx.getRexBuilder();
RelDataTypeFactory typeFactory = cx.getTypeFactory();
SqlValidator validator = cx.getValidator();
if (literal.getValue() == null) {
// Since there is no eq. RexLiteral of SqlLiteral.Unknown we
// treat it as a cast(null as boolean)
RelDataType type;
if (literal.getTypeName() == SqlTypeName.BOOLEAN) {
type = typeFactory.createSqlType(SqlTypeName.BOOLEAN);
type = typeFactory.createTypeWithNullability(type, true);
} else {
type = validator.getValidatedNodeType(literal);
}
return rexBuilder.makeCast(
type,
rexBuilder.constantNull());
}
BitString bitString;
SqlIntervalLiteral.IntervalValue intervalValue;
long l;
switch (literal.getTypeName()) {
case DECIMAL:
// exact number
BigDecimal bd = literal.getValueAs(BigDecimal.class);
return rexBuilder.makeExactLiteral(
bd,
literal.createSqlType(typeFactory));
case DOUBLE:
// approximate type
// TODO: preserve fixed-point precision and large integers
return rexBuilder.makeApproxLiteral(literal.getValueAs(BigDecimal.class));
case CHAR:
return rexBuilder.makeCharLiteral(literal.getValueAs(NlsString.class));
case BOOLEAN:
return rexBuilder.makeLiteral(literal.getValueAs(Boolean.class));
case BINARY:
bitString = literal.getValueAs(BitString.class);
Preconditions.checkArgument((bitString.getBitCount() % 8) == 0,
"incomplete octet");
// An even number of hexits (e.g. X'ABCD') makes whole number
// of bytes.
ByteString byteString = new ByteString(bitString.getAsByteArray());
return rexBuilder.makeBinaryLiteral(byteString);
case SYMBOL:
return rexBuilder.makeFlag(literal.getValueAs(Enum.class));
case TIMESTAMP:
return rexBuilder.makeTimestampLiteral(
literal.getValueAs(TimestampString.class),
((SqlTimestampLiteral) literal).getPrec());
case TIME:
return rexBuilder.makeTimeLiteral(
literal.getValueAs(TimeString.class),
((SqlTimeLiteral) literal).getPrec());
case DATE:
return rexBuilder.makeDateLiteral(literal.getValueAs(DateString.class));
case INTERVAL_YEAR:
case INTERVAL_YEAR_MONTH:
case INTERVAL_MONTH:
case INTERVAL_DAY:
case INTERVAL_DAY_HOUR:
case INTERVAL_DAY_MINUTE:
case INTERVAL_DAY_SECOND:
case INTERVAL_HOUR:
case INTERVAL_HOUR_MINUTE:
case INTERVAL_HOUR_SECOND:
case INTERVAL_MINUTE:
case INTERVAL_MINUTE_SECOND:
case INTERVAL_SECOND:
SqlIntervalQualifier sqlIntervalQualifier =
literal.getValueAs(SqlIntervalLiteral.IntervalValue.class)
.getIntervalQualifier();
return rexBuilder.makeIntervalLiteral(
literal.getValueAs(BigDecimal.class),
sqlIntervalQualifier);
default:
throw Util.unexpected(literal.getTypeName());
}
}
Example 7
| Source File: StandardConvertletTable.java From Bats with Apache License 2.0 | 4 votes |
|
public RexNode convertCall(SqlRexContext cx, SqlCall call) {
// TIMESTAMPDIFF(unit, t1, t2)
// => (t2 - t1) UNIT
final RexBuilder rexBuilder = cx.getRexBuilder();
final SqlLiteral unitLiteral = call.operand(0);
TimeUnit unit = unitLiteral.symbolValue(TimeUnit.class);
BigDecimal multiplier = BigDecimal.ONE;
BigDecimal divider = BigDecimal.ONE;
SqlTypeName sqlTypeName = unit == TimeUnit.NANOSECOND
? SqlTypeName.BIGINT
: SqlTypeName.INTEGER;
switch (unit) {
case MICROSECOND:
case MILLISECOND:
case NANOSECOND:
case WEEK:
multiplier = BigDecimal.valueOf(DateTimeUtils.MILLIS_PER_SECOND);
divider = unit.multiplier;
unit = TimeUnit.SECOND;
break;
case QUARTER:
divider = unit.multiplier;
unit = TimeUnit.MONTH;
break;
}
final SqlIntervalQualifier qualifier =
new SqlIntervalQualifier(unit, null, SqlParserPos.ZERO);
final RexNode op2 = cx.convertExpression(call.operand(2));
final RexNode op1 = cx.convertExpression(call.operand(1));
final RelDataType intervalType =
cx.getTypeFactory().createTypeWithNullability(
cx.getTypeFactory().createSqlIntervalType(qualifier),
op1.getType().isNullable() || op2.getType().isNullable());
final RexCall rexCall = (RexCall) rexBuilder.makeCall(
intervalType, SqlStdOperatorTable.MINUS_DATE,
ImmutableList.of(op2, op1));
final RelDataType intType =
cx.getTypeFactory().createTypeWithNullability(
cx.getTypeFactory().createSqlType(sqlTypeName),
SqlTypeUtil.containsNullable(rexCall.getType()));
RexNode e = rexBuilder.makeCast(intType, rexCall);
return rexBuilder.multiplyDivide(e, multiplier, divider);
}
Example 8
| Source File: DrillReduceAggregatesRule.java From Bats with Apache License 2.0 | 4 votes |
|
private RexNode reduceAvg(
Aggregate oldAggRel,
AggregateCall oldCall,
List<AggregateCall> newCalls,
Map<AggregateCall, RexNode> aggCallMapping) {
final PlannerSettings plannerSettings = (PlannerSettings) oldAggRel.getCluster().getPlanner().getContext();
final boolean isInferenceEnabled = plannerSettings.isTypeInferenceEnabled();
final int nGroups = oldAggRel.getGroupCount();
RelDataTypeFactory typeFactory =
oldAggRel.getCluster().getTypeFactory();
RexBuilder rexBuilder = oldAggRel.getCluster().getRexBuilder();
int iAvgInput = oldCall.getArgList().get(0);
RelDataType avgInputType =
getFieldType(
oldAggRel.getInput(),
iAvgInput);
RelDataType sumType =
TypeInferenceUtils.getDrillSqlReturnTypeInference(SqlKind.SUM.name(),
ImmutableList.of())
.inferReturnType(oldCall.createBinding(oldAggRel));
sumType =
typeFactory.createTypeWithNullability(
sumType,
sumType.isNullable() || nGroups == 0);
SqlAggFunction sumAgg =
new DrillCalciteSqlAggFunctionWrapper(new SqlSumEmptyIsZeroAggFunction(), sumType);
AggregateCall sumCall = AggregateCall.create(sumAgg, oldCall.isDistinct(),
oldCall.isApproximate(), oldCall.getArgList(), -1, sumType, null);
final SqlCountAggFunction countAgg = (SqlCountAggFunction) SqlStdOperatorTable.COUNT;
final RelDataType countType = countAgg.getReturnType(typeFactory);
AggregateCall countCall = AggregateCall.create(countAgg, oldCall.isDistinct(),
oldCall.isApproximate(), oldCall.getArgList(), -1, countType, null);
RexNode tmpsumRef =
rexBuilder.addAggCall(
sumCall,
nGroups,
oldAggRel.indicator,
newCalls,
aggCallMapping,
ImmutableList.of(avgInputType));
RexNode tmpcountRef =
rexBuilder.addAggCall(
countCall,
nGroups,
oldAggRel.indicator,
newCalls,
aggCallMapping,
ImmutableList.of(avgInputType));
RexNode n = rexBuilder.makeCall(SqlStdOperatorTable.CASE,
rexBuilder.makeCall(SqlStdOperatorTable.EQUALS,
tmpcountRef, rexBuilder.makeExactLiteral(BigDecimal.ZERO)),
rexBuilder.constantNull(),
tmpsumRef);
// NOTE: these references are with respect to the output
// of newAggRel
/*
RexNode numeratorRef =
rexBuilder.makeCall(CastHighOp,
rexBuilder.addAggCall(
sumCall,
nGroups,
newCalls,
aggCallMapping,
ImmutableList.of(avgInputType))
);
*/
RexNode numeratorRef = rexBuilder.makeCall(CastHighOp, n);
RexNode denominatorRef =
rexBuilder.addAggCall(
countCall,
nGroups,
oldAggRel.indicator,
newCalls,
aggCallMapping,
ImmutableList.of(avgInputType));
if (isInferenceEnabled) {
return rexBuilder.makeCall(
new DrillSqlOperator(
"divide",
2,
true,
oldCall.getType(), false),
numeratorRef,
denominatorRef);
} else {
final RexNode divideRef =
rexBuilder.makeCall(
SqlStdOperatorTable.DIVIDE,
numeratorRef,
denominatorRef);
return rexBuilder.makeCast(
typeFactory.createSqlType(SqlTypeName.ANY), divideRef);
}
}
Example 9
| Source File: AggregateReduceFunctionsRule.java From calcite with Apache License 2.0 | 4 votes |
|
private RexNode reduceAvg(
Aggregate oldAggRel,
AggregateCall oldCall,
List<AggregateCall> newCalls,
Map<AggregateCall, RexNode> aggCallMapping,
List<RexNode> inputExprs) {
final int nGroups = oldAggRel.getGroupCount();
final RexBuilder rexBuilder = oldAggRel.getCluster().getRexBuilder();
final int iAvgInput = oldCall.getArgList().get(0);
final RelDataType avgInputType =
getFieldType(
oldAggRel.getInput(),
iAvgInput);
final AggregateCall sumCall =
AggregateCall.create(SqlStdOperatorTable.SUM,
oldCall.isDistinct(),
oldCall.isApproximate(),
oldCall.ignoreNulls(),
oldCall.getArgList(),
oldCall.filterArg,
oldCall.collation,
oldAggRel.getGroupCount(),
oldAggRel.getInput(),
null,
null);
final AggregateCall countCall =
AggregateCall.create(SqlStdOperatorTable.COUNT,
oldCall.isDistinct(),
oldCall.isApproximate(),
oldCall.ignoreNulls(),
oldCall.getArgList(),
oldCall.filterArg,
oldCall.collation,
oldAggRel.getGroupCount(),
oldAggRel.getInput(),
null,
null);
// NOTE: these references are with respect to the output
// of newAggRel
RexNode numeratorRef =
rexBuilder.addAggCall(sumCall,
nGroups,
newCalls,
aggCallMapping,
ImmutableList.of(avgInputType));
final RexNode denominatorRef =
rexBuilder.addAggCall(countCall,
nGroups,
newCalls,
aggCallMapping,
ImmutableList.of(avgInputType));
final RelDataTypeFactory typeFactory = oldAggRel.getCluster().getTypeFactory();
final RelDataType avgType = typeFactory.createTypeWithNullability(
oldCall.getType(), numeratorRef.getType().isNullable());
numeratorRef = rexBuilder.ensureType(avgType, numeratorRef, true);
final RexNode divideRef =
rexBuilder.makeCall(SqlStdOperatorTable.DIVIDE, numeratorRef, denominatorRef);
return rexBuilder.makeCast(oldCall.getType(), divideRef);
}
Example 10
| Source File: AggregateReduceFunctionsRule.java From calcite with Apache License 2.0 | 4 votes |
|
private RexNode reduceRegrSzz(
Aggregate oldAggRel,
AggregateCall oldCall,
List<AggregateCall> newCalls,
Map<AggregateCall, RexNode> aggCallMapping,
List<RexNode> inputExprs,
int xIndex,
int yIndex,
int nullFilterIndex) {
// regr_sxx(x, y) ==>
// sum(y * y, x) - sum(y, x) * sum(y, x) / regr_count(x, y)
//
final RelOptCluster cluster = oldAggRel.getCluster();
final RexBuilder rexBuilder = cluster.getRexBuilder();
final RelDataTypeFactory typeFactory = cluster.getTypeFactory();
final RelDataType argXType = getFieldType(oldAggRel.getInput(), xIndex);
final RelDataType argYType =
xIndex == yIndex ? argXType : getFieldType(oldAggRel.getInput(), yIndex);
final RelDataType nullFilterIndexType =
nullFilterIndex == yIndex ? argYType : getFieldType(oldAggRel.getInput(), yIndex);
final RelDataType oldCallType =
typeFactory.createTypeWithNullability(oldCall.getType(),
argXType.isNullable() || argYType.isNullable() || nullFilterIndexType.isNullable());
final RexNode argX =
rexBuilder.ensureType(oldCallType, inputExprs.get(xIndex), true);
final RexNode argY =
rexBuilder.ensureType(oldCallType, inputExprs.get(yIndex), true);
final RexNode argNullFilter =
rexBuilder.ensureType(oldCallType, inputExprs.get(nullFilterIndex), true);
final RexNode argXArgY = rexBuilder.makeCall(SqlStdOperatorTable.MULTIPLY, argX, argY);
final int argSquaredOrdinal = lookupOrAdd(inputExprs, argXArgY);
final RexNode argXAndYNotNullFilter = rexBuilder.makeCall(SqlStdOperatorTable.AND,
rexBuilder.makeCall(SqlStdOperatorTable.AND,
rexBuilder.makeCall(SqlStdOperatorTable.IS_NOT_NULL, argX),
rexBuilder.makeCall(SqlStdOperatorTable.IS_NOT_NULL, argY)),
rexBuilder.makeCall(SqlStdOperatorTable.IS_NOT_NULL, argNullFilter));
final int argXAndYNotNullFilterOrdinal = lookupOrAdd(inputExprs, argXAndYNotNullFilter);
final RexNode sumXY = getSumAggregatedRexNodeWithBinding(
oldAggRel, oldCall, newCalls, aggCallMapping, argXArgY.getType(),
argSquaredOrdinal, argXAndYNotNullFilterOrdinal);
final RexNode sumXYCast = rexBuilder.ensureType(oldCallType, sumXY, true);
final RexNode sumX = getSumAggregatedRexNode(oldAggRel, oldCall,
newCalls, aggCallMapping, rexBuilder, xIndex, argXAndYNotNullFilterOrdinal);
final RexNode sumY = xIndex == yIndex
? sumX
: getSumAggregatedRexNode(oldAggRel, oldCall, newCalls,
aggCallMapping, rexBuilder, yIndex, argXAndYNotNullFilterOrdinal);
final RexNode sumXSumY = rexBuilder.makeCall(SqlStdOperatorTable.MULTIPLY, sumX, sumY);
final RexNode countArg = getRegrCountRexNode(oldAggRel, oldCall, newCalls, aggCallMapping,
ImmutableIntList.of(xIndex), ImmutableList.of(argXType), argXAndYNotNullFilterOrdinal);
RexLiteral zero = rexBuilder.makeExactLiteral(BigDecimal.ZERO);
RexNode nul = rexBuilder.makeNullLiteral(zero.getType());
final RexNode avgSumXSumY = rexBuilder.makeCall(SqlStdOperatorTable.CASE,
rexBuilder.makeCall(SqlStdOperatorTable.EQUALS, countArg, zero), nul,
rexBuilder.makeCall(SqlStdOperatorTable.DIVIDE, sumXSumY, countArg));
final RexNode avgSumXSumYCast = rexBuilder.ensureType(oldCallType, avgSumXSumY, true);
final RexNode result =
rexBuilder.makeCall(SqlStdOperatorTable.MINUS, sumXYCast, avgSumXSumYCast);
return rexBuilder.makeCast(oldCall.getType(), result);
}
Example 11
| Source File: StandardConvertletTable.java From calcite with Apache License 2.0 | 4 votes |
|
public RexNode convertCall(SqlRexContext cx, SqlCall call) {
// TIMESTAMPDIFF(unit, t1, t2)
// => (t2 - t1) UNIT
final RexBuilder rexBuilder = cx.getRexBuilder();
final SqlLiteral unitLiteral = call.operand(0);
TimeUnit unit = unitLiteral.symbolValue(TimeUnit.class);
BigDecimal multiplier = BigDecimal.ONE;
BigDecimal divider = BigDecimal.ONE;
SqlTypeName sqlTypeName = unit == TimeUnit.NANOSECOND
? SqlTypeName.BIGINT
: SqlTypeName.INTEGER;
switch (unit) {
case MICROSECOND:
case MILLISECOND:
case NANOSECOND:
case WEEK:
multiplier = BigDecimal.valueOf(DateTimeUtils.MILLIS_PER_SECOND);
divider = unit.multiplier;
unit = TimeUnit.SECOND;
break;
case QUARTER:
divider = unit.multiplier;
unit = TimeUnit.MONTH;
break;
}
final SqlIntervalQualifier qualifier =
new SqlIntervalQualifier(unit, null, SqlParserPos.ZERO);
final RexNode op2 = cx.convertExpression(call.operand(2));
final RexNode op1 = cx.convertExpression(call.operand(1));
final RelDataType intervalType =
cx.getTypeFactory().createTypeWithNullability(
cx.getTypeFactory().createSqlIntervalType(qualifier),
op1.getType().isNullable() || op2.getType().isNullable());
final RexCall rexCall = (RexCall) rexBuilder.makeCall(
intervalType, SqlStdOperatorTable.MINUS_DATE,
ImmutableList.of(op2, op1));
final RelDataType intType =
cx.getTypeFactory().createTypeWithNullability(
cx.getTypeFactory().createSqlType(sqlTypeName),
SqlTypeUtil.containsNullable(rexCall.getType()));
RexNode e = rexBuilder.makeCast(intType, rexCall);
return rexBuilder.multiplyDivide(e, multiplier, divider);
}
