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| def generateLookupFunction(
config: TableConfig,
typeFactory: FlinkTypeFactory,
inputType: LogicalType,
returnType: LogicalType,
tableReturnTypeInfo: TypeInformation[_],
lookupKeyInOrder: Array[Int],
allLookupFields: Map[Int, LookupKey],
lookupFunction: TableFunction[_],
enableObjectReuse: Boolean)
: GeneratedFunction[FlatMapFunction[RowData, RowData]] = {
val ctx = CodeGeneratorContext(config)
val batchJoinEnabled = config.getConfiguration.getBoolean(
"temporal.table.exec.mini-batch.enabled", false)
val logicalType = RowType.of(DataTypes.RAW(TypeInformation.of(new TypeHint[MiniBatchJoinType] {})).getLogicalType)
val (prepareCode, parameters, nullInParameters) = if (batchJoinEnabled) {
prepareParameters(
ctx,
typeFactory,
logicalType,
lookupKeyInOrder,
allLookupFields,
tableReturnTypeInfo.isInstanceOf[RowTypeInfo],
enableObjectReuse)
} else {
prepareParameters(
ctx,
typeFactory,
inputType,
lookupKeyInOrder,
allLookupFields,
tableReturnTypeInfo.isInstanceOf[RowTypeInfo],
enableObjectReuse)
}
val lookupFunctionTerm = ctx.addReusableFunction(lookupFunction)
val setCollectorCode = tableReturnTypeInfo match {
case rt: RowTypeInfo =>
val converterCollector = new RowToRowDataCollector(rt)
val term = ctx.addReusableObject(converterCollector, "collector")
s"""
|$term.setCollector($DEFAULT_COLLECTOR_TERM);
|$lookupFunctionTerm.setCollector($term);
""".stripMargin
case _ =>
s"$lookupFunctionTerm.setCollector($DEFAULT_COLLECTOR_TERM);"
}
val elseCode = if (batchJoinEnabled) {
s"""$lookupFunctionTerm.batchEval($parameters);"""
} else {
s"""$lookupFunctionTerm.eval($parameters);"""
}
val body =
s"""
|$prepareCode
|$setCollectorCode
|if ($nullInParameters) {
| return;
|} else {
| $elseCode
| }
""".stripMargin
if (batchJoinEnabled) {
FunctionCodeGenerator.generateFunction(
ctx,
"LookupFunction",
classOf[FlatMapFunction[RowData, RowData]],
body,
returnType,
logicalType)
} else {
FunctionCodeGenerator.generateFunction(
ctx,
"LookupFunction",
classOf[FlatMapFunction[RowData, RowData]],
body,
returnType,
inputType)
}
}
private def prepareParameters(
ctx: CodeGeneratorContext,
typeFactory: FlinkTypeFactory,
inputType: LogicalType,
lookupKeyInOrder: Array[Int],
allLookupFields: Map[Int, LookupKey],
isExternalArgs: Boolean,
fieldCopy: Boolean): (String, String, String) = {
val batchJoinEnabled = ctx.tableConfig.getConfiguration.getBoolean(
"temporal.table.exec.mini-batch.enabled", false)
val inputFieldExprs = if (batchJoinEnabled) {
val expression = generateInputAccess(
ctx,
inputType,
DEFAULT_INPUT1_TERM,
0,
nullableInput = false,
fieldCopy)
Array(expression)
} else {
for (i <- lookupKeyInOrder) yield {
allLookupFields.get(i) match {
case Some(ConstantLookupKey(dataType, literal)) =>
generateLiteral(ctx, dataType, literal.getValue3)
case Some(FieldRefLookupKey(index)) =>
generateInputAccess(
ctx,
inputType,
DEFAULT_INPUT1_TERM,
index,
nullableInput = false,
fieldCopy)
case None =>
throw new CodeGenException("This should never happen!")
}
}
}
val codeAndArg = inputFieldExprs
.map { e =>
val dataType = fromLogicalTypeToDataType(e.resultType)
val bType = if (isExternalArgs) {
typeTerm(dataType.getConversionClass)
} else {
boxedTypeTermForType(e.resultType)
}
val assign = if (isExternalArgs) {
CodeGenUtils.genToExternalConverter(ctx, dataType, e.resultTerm)
} else {
e.resultTerm
}
val newTerm = newName("arg")
val code =
s"""
|$bType $newTerm = null;
|if (!${e.nullTerm}) {
| $newTerm = $assign;
|}
""".stripMargin
(code, newTerm, e.nullTerm)
}
(
codeAndArg.map(_._1).mkString("\n"),
codeAndArg.map(_._2).mkString(", "),
codeAndArg.map(_._3).mkString("|| "))
}
|
