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io.questdb.griffin.engine.functions.conditional.CoalesceFunctionFactory Maven / Gradle / Ivy
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* Copyright (c) 2014-2019 Appsicle
* Copyright (c) 2019-2020 QuestDB
*
* Licensed 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,
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package io.questdb.griffin.engine.functions.conditional;
import io.questdb.cairo.CairoConfiguration;
import io.questdb.cairo.ColumnType;
import io.questdb.cairo.sql.Function;
import io.questdb.cairo.sql.Record;
import io.questdb.griffin.FunctionFactory;
import io.questdb.griffin.SqlException;
import io.questdb.griffin.SqlExecutionContext;
import io.questdb.griffin.engine.functions.*;
import io.questdb.std.Long256;
import io.questdb.std.Long256Impl;
import io.questdb.std.Numbers;
import io.questdb.std.ObjList;
import io.questdb.std.str.CharSink;
public class CoalesceFunctionFactory implements FunctionFactory {
@Override
public String getSignature() {
return "coalesce(V)";
}
@Override
public Function newInstance(ObjList args, int position, CairoConfiguration configuration, SqlExecutionContext sqlExecutionContext) throws SqlException {
if (args.size() < 2) {
throw SqlException.$(position, "coalesce can be used with 2 or more arguments");
}
if (args.size() > 2) {
// copy, args collection will be reused by sql parser
args = new ObjList<>(args);
}
// Similar to CASE function.
// compute return type in this loop
final int argsSize = args.size();
int returnType = -1;
for (int i = 0; i < argsSize; i++) {
returnType = CaseCommon.getCommonType(returnType, args.getQuick(i).getType(), args.getQuick(i).getPosition());
}
switch (returnType) {
case ColumnType.DOUBLE:
return argsSize == 2 ? new TwoDoubleCoalesceFunction(position, args) : new DoubleCoalesceFunction(position, args, argsSize);
case ColumnType.DATE:
return argsSize == 2 ? new TwoDateCoalesceFunction(position, args) : new DateCoalesceFunction(position, args, argsSize);
case ColumnType.TIMESTAMP:
return argsSize == 2 ? new TwoTimestampCoalesceFunction(position, args) : new TimestampCoalesceFunction(position, args);
case ColumnType.LONG:
return argsSize == 2 ? new TwoLongCoalesceFunction(position, args) : new LongCoalesceFunction(position, args, argsSize);
case ColumnType.LONG256:
return argsSize == 2 ? new TwoLong256CoalesceFunction(position, args) : new Long256CoalesceFunction(position, args);
case ColumnType.INT:
return argsSize == 2 ? new TwoIntCoalesceFunction(position, args) : new IntCoalesceFunction(position, args, argsSize);
case ColumnType.FLOAT:
return argsSize == 2 ? new TwoFloatCoalesceFunction(position, args) : new FloatCoalesceFunction(position, args, argsSize);
case ColumnType.STRING:
case ColumnType.SYMBOL:
if (argsSize == 2) {
int type0 = args.getQuick(0).getType();
if (type0 != args.getQuick(1).getType()) {
return new TwoSymStrCoalesceFunction(position, args);
} else if (type0 == ColumnType.SYMBOL) {
return new TwoSymCoalesceFunction(position, args);
} else {
return new TwoStrCoalesceFunction(position, args);
}
}
return new SymStrCoalesceFunction(position, args, argsSize);
case ColumnType.BOOLEAN:
case ColumnType.SHORT:
case ColumnType.BYTE:
case ColumnType.CHAR:
// Null on these data types not supported
return args.getQuick(0);
default:
throw SqlException.$(position, "coalesce cannot be used with ")
.put(ColumnType.nameOf(returnType))
.put(" data type");
}
}
private static boolean isNotNull(Long256 value) {
return value != null &&
value != Long256Impl.NULL_LONG256 && (value.getLong0() != Numbers.LONG_NaN ||
value.getLong1() != Numbers.LONG_NaN ||
value.getLong2() != Numbers.LONG_NaN ||
value.getLong3() != Numbers.LONG_NaN);
}
private static class TwoDoubleCoalesceFunction extends DoubleFunction implements BinaryFunction {
private final Function args0;
private final Function args1;
public TwoDoubleCoalesceFunction(int position, ObjList args) {
super(position);
assert args.size() == 2;
this.args0 = args.getQuick(0);
this.args1 = args.getQuick(1);
}
@Override
public double getDouble(Record rec) {
double value = args0.getDouble(rec);
if (value == value) {
return value;
}
return args1.getDouble(rec);
}
@Override
public Function getLeft() {
return args0;
}
@Override
public Function getRight() {
return args1;
}
}
private static class DoubleCoalesceFunction extends DoubleFunction implements MultiArgFunction {
private final ObjList args;
private final int size;
public DoubleCoalesceFunction(int position, ObjList args, int size) {
super(position);
this.args = args;
this.size = size;
}
@Override
public ObjList getArgs() {
return args;
}
@Override
public double getDouble(Record rec) {
for (int i = 0; i < size; i++) {
double value = args.getQuick(i).getDouble(rec);
if (value == value) {
return value;
}
}
return Double.NaN;
}
}
private static class TwoFloatCoalesceFunction extends FloatFunction implements BinaryFunction {
private final Function args0;
private final Function args1;
public TwoFloatCoalesceFunction(int position, ObjList args) {
super(position);
assert args.size() == 2;
this.args0 = args.getQuick(0);
this.args1 = args.getQuick(1);
}
@Override
public float getFloat(Record rec) {
float value = args0.getFloat(rec);
if (value == value) {
return value;
}
return args1.getFloat(rec);
}
@Override
public Function getLeft() {
return args0;
}
@Override
public Function getRight() {
return args1;
}
}
private static class FloatCoalesceFunction extends FloatFunction implements MultiArgFunction {
private final ObjList args;
private final int size;
public FloatCoalesceFunction(int position, ObjList args, int size) {
super(position);
this.args = args;
this.size = size;
}
@Override
public ObjList getArgs() {
return args;
}
@Override
public float getFloat(Record rec) {
for (int i = 0; i < size; i++) {
float value = args.getQuick(i).getFloat(rec);
if (value == value) {
return value;
}
}
return Float.NaN;
}
}
private static class TwoDateCoalesceFunction extends DateFunction implements BinaryFunction {
private final Function args0;
private final Function args1;
public TwoDateCoalesceFunction(int position, ObjList args) {
super(position);
assert args.size() == 2;
this.args0 = args.getQuick(0);
this.args1 = args.getQuick(1);
}
@Override
public long getDate(Record rec) {
long value = args0.getDate(rec);
if (value != Numbers.LONG_NaN) {
return value;
}
return args1.getDate(rec);
}
@Override
public Function getLeft() {
return args0;
}
@Override
public Function getRight() {
return args1;
}
}
private static class DateCoalesceFunction extends DateFunction implements MultiArgFunction {
private final ObjList args;
private final int size;
public DateCoalesceFunction(int position, ObjList args, int size) {
super(position);
this.args = args;
this.size = size;
}
@Override
public ObjList getArgs() {
return args;
}
@Override
public long getDate(Record rec) {
for (int i = 0; i < size; i++) {
long value = args.getQuick(i).getDate(rec);
if (value != Numbers.LONG_NaN) {
return value;
}
}
return Numbers.LONG_NaN;
}
}
private static class TwoTimestampCoalesceFunction extends TimestampFunction implements BinaryFunction {
private final Function args0;
private final Function args1;
public TwoTimestampCoalesceFunction(int position, ObjList args) {
super(position);
assert args.size() == 2;
this.args0 = args.getQuick(0);
this.args1 = args.getQuick(1);
}
@Override
public Function getLeft() {
return args0;
}
@Override
public Function getRight() {
return args1;
}
@Override
public long getTimestamp(Record rec) {
long value = args0.getTimestamp(rec);
if (value != Numbers.LONG_NaN) {
return value;
}
return args1.getTimestamp(rec);
}
}
private static class TimestampCoalesceFunction extends TimestampFunction implements MultiArgFunction {
private final ObjList args;
private final int size;
public TimestampCoalesceFunction(int position, ObjList args) {
super(position);
this.args = args;
this.size = args.size();
}
@Override
public ObjList getArgs() {
return args;
}
@Override
public long getTimestamp(Record rec) {
for (int i = 0; i < size; i++) {
long value = args.getQuick(i).getTimestamp(rec);
if (value != Numbers.LONG_NaN) {
return value;
}
}
return Numbers.LONG_NaN;
}
}
public static class TwoLongCoalesceFunction extends LongFunction implements BinaryFunction {
private final Function args0;
private final Function args1;
public TwoLongCoalesceFunction(int position, ObjList args) {
super(position);
assert args.size() == 2;
this.args0 = args.getQuick(0);
this.args1 = args.getQuick(1);
}
@Override
public Function getLeft() {
return args0;
}
@Override
public Function getRight() {
return args1;
}
@Override
public long getLong(Record rec) {
long value = args0.getLong(rec);
if (value != Numbers.LONG_NaN) {
return value;
}
return args1.getLong(rec);
}
}
public static class LongCoalesceFunction extends LongFunction implements MultiArgFunction {
private final ObjList args;
private final int size;
public LongCoalesceFunction(int position, ObjList args, int size) {
super(position);
this.args = args;
this.size = size;
}
@Override
public ObjList getArgs() {
return args;
}
@Override
public long getLong(Record rec) {
long value;
for (int i = 0; i < size; i++) {
value = args.getQuick(i).getLong(rec);
if (value != Numbers.LONG_NaN) {
return value;
}
}
return Numbers.LONG_NaN;
}
}
private static class TwoLong256CoalesceFunction extends Long256Function implements BinaryFunction {
private final Function args1;
private final Function args0;
public TwoLong256CoalesceFunction(int position, ObjList args) {
super(position);
assert args.size() == 2;
this.args0 = args.getQuick(0);
this.args1 = args.getQuick(1);
}
@Override
public Function getLeft() {
return args0;
}
@Override
public Function getRight() {
return args1;
}
@Override
public void getLong256(Record rec, CharSink sink) {
Long256 value = args0.getLong256A(rec);
if (isNotNull(value)) {
Numbers.appendLong256(value.getLong0(), value.getLong1(), value.getLong2(), value.getLong3(), sink);
} else {
value = args1.getLong256A(rec);
Numbers.appendLong256(value.getLong0(), value.getLong1(), value.getLong2(), value.getLong3(), sink);
}
}
@Override
public Long256 getLong256A(Record rec) {
Long256 value = args0.getLong256A(rec);
if (isNotNull(value)) {
return value;
}
return args1.getLong256A(rec);
}
@Override
public Long256 getLong256B(Record rec) {
Long256 value = args0.getLong256B(rec);
if (isNotNull(value)) {
return value;
}
return args1.getLong256B(rec);
}
}
private static class Long256CoalesceFunction extends Long256Function implements MultiArgFunction {
private final ObjList args;
private final int size;
public Long256CoalesceFunction(int position, ObjList args) {
super(position);
this.args = args;
this.size = args.size();
}
@Override
public ObjList getArgs() {
return args;
}
@Override
public void getLong256(Record rec, CharSink sink) {
for (int i = 0; i < size; i++) {
Long256 value = args.getQuick(i).getLong256A(rec);
if (isNotNull(value)) {
Numbers.appendLong256(value.getLong0(), value.getLong1(), value.getLong2(), value.getLong3(), sink);
return;
}
}
}
@Override
public Long256 getLong256A(Record rec) {
Long256 value = Long256Impl.NULL_LONG256;
for (int i = 0; i < size; i++) {
value = args.getQuick(i).getLong256A(rec);
if (isNotNull(value)) {
return value;
}
}
return value;
}
@Override
public Long256 getLong256B(Record rec) {
Long256 value = Long256Impl.NULL_LONG256;
for (int i = 0; i < size; i++) {
value = args.getQuick(i).getLong256B(rec);
if (isNotNull(value)) {
return value;
}
}
return value;
}
}
private static class TwoIntCoalesceFunction extends IntFunction implements BinaryFunction {
private final Function args0;
private final Function args1;
public TwoIntCoalesceFunction(int position, ObjList args) {
super(position);
assert args.size() == 2;
this.args0 = args.getQuick(0);
this.args1 = args.getQuick(1);
}
@Override
public int getInt(Record rec) {
int value = args0.getInt(rec);
if (value != Numbers.INT_NaN) {
return value;
}
return args1.getInt(rec);
}
@Override
public Function getLeft() {
return args0;
}
@Override
public Function getRight() {
return args1;
}
}
private static class IntCoalesceFunction extends IntFunction implements MultiArgFunction {
private final ObjList args;
private final int size;
public IntCoalesceFunction(int position, ObjList args, int size) {
super(position);
this.args = args;
this.size = size;
}
@Override
public ObjList getArgs() {
return args;
}
@Override
public int getInt(Record rec) {
for (int i = 0; i < size; i++) {
int value = args.getQuick(i).getInt(rec);
if (value != Numbers.INT_NaN) {
return value;
}
}
return Numbers.INT_NaN;
}
}
private static class TwoSymStrCoalesceFunction extends StrFunction implements BinaryFunction {
private final Function args0;
private final Function args1;
private final boolean args0IsSymbol;
private final boolean arg1IsSymbol;
@Override
public Function getLeft() {
return args0;
}
@Override
public Function getRight() {
return args1;
}
public TwoSymStrCoalesceFunction(int position, ObjList args) {
super(position);
assert args.size() == 2;
this.args0 = args.getQuick(0);
this.args1 = args.getQuick(1);
this.args0IsSymbol = args0.getType() == ColumnType.SYMBOL;
this.arg1IsSymbol = args1.getType() == ColumnType.SYMBOL;
}
@Override
public CharSequence getStr(Record rec) {
CharSequence value = args0IsSymbol ? args0.getSymbol(rec) : args0.getStr(rec);
if (value != null) {
return value;
}
return arg1IsSymbol ? args1.getSymbol(rec) : args1.getStr(rec);
}
@Override
public CharSequence getStrB(Record rec) {
CharSequence value = args0IsSymbol ? args0.getSymbolB(rec) : args0.getStrB(rec);
if (value != null) {
return value;
}
return arg1IsSymbol ? args1.getSymbolB(rec) : args1.getStrB(rec);
}
}
private static class TwoSymCoalesceFunction extends StrFunction implements BinaryFunction {
private final Function args0;
private final Function args1;
@Override
public Function getLeft() {
return args0;
}
@Override
public Function getRight() {
return args1;
}
public TwoSymCoalesceFunction(int position, ObjList args) {
super(position);
assert args.size() == 2;
this.args0 = args.getQuick(0);
this.args1 = args.getQuick(1);
}
@Override
public CharSequence getStr(Record rec) {
CharSequence value = args0.getSymbol(rec);
if (value != null) {
return value;
}
return args1.getSymbol(rec);
}
@Override
public CharSequence getStrB(Record rec) {
CharSequence value = args0.getSymbolB(rec);
if (value != null) {
return value;
}
return args1.getSymbolB(rec);
}
}
private static class TwoStrCoalesceFunction extends StrFunction implements BinaryFunction {
private final Function args0;
private final Function args1;
@Override
public Function getLeft() {
return args0;
}
@Override
public Function getRight() {
return args1;
}
public TwoStrCoalesceFunction(int position, ObjList args) {
super(position);
assert args.size() == 2;
this.args0 = args.getQuick(0);
this.args1 = args.getQuick(1);
}
@Override
public CharSequence getStr(Record rec) {
CharSequence value = args0.getStr(rec);
if (value != null) {
return value;
}
return args1.getStr(rec);
}
@Override
public CharSequence getStrB(Record rec) {
CharSequence value = args0.getStrB(rec);
if (value != null) {
return value;
}
return args1.getStrB(rec);
}
}
private static class SymStrCoalesceFunction extends StrFunction implements MultiArgFunction {
private final ObjList args;
private final int size;
public SymStrCoalesceFunction(int position, ObjList args, int size) {
super(position);
this.args = args;
this.size = size;
}
@Override
public ObjList getArgs() {
return args;
}
@Override
public CharSequence getStr(Record rec) {
for (int i = 0; i < size; i++) {
Function arg = args.getQuick(i);
CharSequence value = (arg.getType() == ColumnType.SYMBOL) ? arg.getSymbol(rec) : arg.getStr(rec);
if (value != null) {
return value;
}
}
return null;
}
@Override
public CharSequence getStrB(Record rec) {
for (int i = 0; i < size; i++) {
Function arg = args.getQuick(i);
CharSequence value = (arg.getType() == ColumnType.SYMBOL) ? arg.getSymbolB(rec) : arg.getStrB(rec);
if (value != null) {
return value;
}
}
return null;
}
}
}
