static void compileJavaProcedure(
VoltCompiler compiler,
HSQLInterface hsql,
DatabaseEstimates estimates,
Catalog catalog,
Database db,
ProcedureDescriptor procedureDescriptor,
InMemoryJarfile jarOutput)
throws VoltCompiler.VoltCompilerException {
final String className = procedureDescriptor.m_className;
final Language lang = procedureDescriptor.m_language;
// Load the class given the class name
Class<?> procClass = procedureDescriptor.m_class;
// get the short name of the class (no package)
String shortName = deriveShortProcedureName(className);
// add an entry to the catalog
final Procedure procedure = db.getProcedures().add(shortName);
for (String groupName : procedureDescriptor.m_authGroups) {
final Group group = db.getGroups().get(groupName);
if (group == null) {
throw compiler
.new VoltCompilerException(
"Procedure "
+ className
+ " allows access by a role "
+ groupName
+ " that does not exist");
}
final GroupRef groupRef = procedure.getAuthgroups().add(groupName);
groupRef.setGroup(group);
}
procedure.setClassname(className);
// sysprocs don't use the procedure compiler
procedure.setSystemproc(false);
procedure.setDefaultproc(procedureDescriptor.m_builtInStmt);
procedure.setHasjava(true);
procedure.setLanguage(lang.name());
ProcedureAnnotation pa = (ProcedureAnnotation) procedure.getAnnotation();
if (pa == null) {
pa = new ProcedureAnnotation();
procedure.setAnnotation(pa);
}
if (procedureDescriptor.m_scriptImpl != null) {
// This is a Groovy or other Java derived procedure and we need to add an annotation with
// the script to the Procedure element in the Catalog
pa.scriptImpl = procedureDescriptor.m_scriptImpl;
}
// get the annotation
// first try to get one that has been passed from the compiler
ProcInfoData info = compiler.getProcInfoOverride(shortName);
// check if partition info was set in ddl
ProcInfoData ddlInfo = null;
if (procedureDescriptor.m_partitionString != null
&& !procedureDescriptor.m_partitionString.trim().isEmpty()) {
ddlInfo = new ProcInfoData();
ddlInfo.partitionInfo = procedureDescriptor.m_partitionString;
ddlInfo.singlePartition = true;
}
// then check for the usual one in the class itself
// and create a ProcInfo.Data instance for it
if (info == null) {
info = new ProcInfoData();
ProcInfo annotationInfo = procClass.getAnnotation(ProcInfo.class);
// error out if partition info is present in both ddl and annotation
if (annotationInfo != null) {
if (ddlInfo != null) {
String msg = "Procedure: " + shortName + " has partition properties defined both in ";
msg += "class \"" + className + "\" and in the schema defintion file(s)";
throw compiler.new VoltCompilerException(msg);
}
// Prevent AutoGenerated DDL from including PARTITION PROCEDURE for this procedure.
pa.classAnnotated = true;
info.partitionInfo = annotationInfo.partitionInfo();
info.singlePartition = annotationInfo.singlePartition();
} else if (ddlInfo != null) {
info = ddlInfo;
}
} else {
pa.classAnnotated = true;
}
assert (info != null);
// make sure multi-partition implies no partitoning info
if (info.singlePartition == false) {
if ((info.partitionInfo != null) && (info.partitionInfo.length() > 0)) {
String msg = "Procedure: " + shortName + " is annotated as multi-partition";
msg += " but partitionInfo has non-empty value: \"" + info.partitionInfo + "\"";
throw compiler.new VoltCompilerException(msg);
}
}
// track if there are any writer statements and/or sequential scans and/or an overlooked common
// partitioning parameter
boolean procHasWriteStmts = false;
boolean procHasSeqScans = false;
// procWantsCommonPartitioning == true but commonPartitionExpression == null signifies a proc
// for which the planner was requested to attempt to find an SP plan, but that was not possible
// -- it had a replicated write or it had one or more partitioned reads that were not all
// filtered by the same partition key value -- so it was planned as an MP proc.
boolean procWantsCommonPartitioning = true;
AbstractExpression commonPartitionExpression = null;
String exampleSPstatement = null;
Object exampleSPvalue = null;
// iterate through the fields and get valid sql statements
Map<String, Object> fields = lang.accept(procedureIntrospector(compiler), procClass);
// determine if proc is read or read-write by checking if the proc contains any write sql stmts
boolean readWrite = false;
for (Object field : fields.values()) {
if (!(field instanceof SQLStmt)) continue;
SQLStmt stmt = (SQLStmt) field;
QueryType qtype = QueryType.getFromSQL(stmt.getText());
if (!qtype.isReadOnly()) {
readWrite = true;
break;
}
}
// default to FASTER determinism mode, which may favor non-deterministic plans
// but if it's a read-write proc, use a SAFER planning mode wrt determinism.
final DeterminismMode detMode = readWrite ? DeterminismMode.SAFER : DeterminismMode.FASTER;
for (Entry<String, Object> entry : fields.entrySet()) {
if (!(entry.getValue() instanceof SQLStmt)) continue;
String stmtName = entry.getKey();
SQLStmt stmt = (SQLStmt) entry.getValue();
// add the statement to the catalog
Statement catalogStmt = procedure.getStatements().add(stmtName);
// compile the statement
StatementPartitioning partitioning =
info.singlePartition ? StatementPartitioning.forceSP() : StatementPartitioning.forceMP();
boolean cacheHit =
StatementCompiler.compileFromSqlTextAndUpdateCatalog(
compiler,
hsql,
catalog,
db,
estimates,
catalogStmt,
stmt.getText(),
stmt.getJoinOrder(),
detMode,
partitioning);
// if this was a cache hit or specified single, don't worry about figuring out more
// partitioning
if (partitioning.wasSpecifiedAsSingle() || cacheHit) {
procWantsCommonPartitioning = false; // Don't try to infer what's already been asserted.
// The planner does not currently attempt to second-guess a plan declared as
// single-partition, maybe some day.
// In theory, the PartitioningForStatement would confirm the use of (only) a parameter as a
// partition key --
// or if the partition key was determined to be some other constant (expression?) it might
// display an informational
// message that the passed parameter is assumed to be equal to the hard-coded partition key
// constant (expression).
// Validate any inferred statement partitioning given the statement's possible usage, until
// a contradiction is found.
} else if (procWantsCommonPartitioning) {
// Only consider statements that are capable of running SP with a partitioning parameter
// that does not seem to
// conflict with the partitioning of prior statements.
if (partitioning.getCountOfIndependentlyPartitionedTables() == 1) {
AbstractExpression statementPartitionExpression =
partitioning.singlePartitioningExpressionForReport();
if (statementPartitionExpression != null) {
if (commonPartitionExpression == null) {
commonPartitionExpression = statementPartitionExpression;
exampleSPstatement = stmt.getText();
exampleSPvalue = partitioning.getInferredPartitioningValue();
} else if (commonPartitionExpression.equals(statementPartitionExpression)
|| (statementPartitionExpression instanceof ParameterValueExpression
&& commonPartitionExpression instanceof ParameterValueExpression)) {
// Any constant used for partitioning would have to be the same for all statements,
// but
// any statement parameter used for partitioning MIGHT come from the same proc
// parameter as
// any other statement's parameter used for partitioning.
} else {
procWantsCommonPartitioning =
false; // appears to be different partitioning for different statements
}
} else {
// There is a statement with a partitioned table whose partitioning column is
// not equality filtered with a constant or param. Abandon all hope.
procWantsCommonPartitioning = false;
}
// Usually, replicated-only statements in a mix with others have no effect on the MP/SP
// decision
} else if (partitioning.getCountOfPartitionedTables() == 0) {
// but SP is strictly forbidden for DML, to maintain the consistency of the replicated
// data.
if (partitioning.getIsReplicatedTableDML()) {
procWantsCommonPartitioning = false;
}
} else {
// There is a statement with a partitioned table whose partitioning column is
// not equality filtered with a constant or param. Abandon all hope.
procWantsCommonPartitioning = false;
}
}
// if a single stmt is not read only, then the proc is not read only
if (catalogStmt.getReadonly() == false) {
procHasWriteStmts = true;
}
if (catalogStmt.getSeqscancount() > 0) {
procHasSeqScans = true;
}
}
// MIGHT the planner have uncovered an overlooked opportunity to run all statements SP?
if (procWantsCommonPartitioning && (commonPartitionExpression != null)) {
String msg = null;
if (commonPartitionExpression instanceof ParameterValueExpression) {
msg =
"This procedure might benefit from an @ProcInfo annotation designating parameter "
+ ((ParameterValueExpression) commonPartitionExpression).getParameterIndex()
+ " of statement '"
+ exampleSPstatement
+ "'";
} else {
String valueDescription = null;
if (exampleSPvalue == null) {
// Statements partitioned on a runtime constant. This is likely to be cryptic, but
// hopefully gets the idea across.
valueDescription = "of " + commonPartitionExpression.explain("");
} else {
valueDescription =
exampleSPvalue.toString(); // A simple constant value COULD have been a parameter.
}
msg =
"This procedure might benefit from an @ProcInfo annotation referencing an added parameter passed the value "
+ valueDescription;
}
compiler.addInfo(msg);
}
// set the read onlyness of a proc
procedure.setReadonly(procHasWriteStmts == false);
procedure.setHasseqscans(procHasSeqScans);
for (Statement catalogStmt : procedure.getStatements()) {
if (catalogStmt.getIscontentdeterministic() == false) {
String potentialErrMsg =
"Procedure "
+ shortName
+ " has a statement with a non-deterministic result - statement: \""
+ catalogStmt.getSqltext()
+ "\" , reason: "
+ catalogStmt.getNondeterminismdetail();
// throw compiler.new VoltCompilerException(potentialErrMsg);
compiler.addWarn(potentialErrMsg);
} else if (catalogStmt.getIsorderdeterministic() == false) {
String warnMsg;
if (procHasWriteStmts) {
String rwPotentialErrMsg =
"Procedure "
+ shortName
+ " is RW and has a statement whose result has a non-deterministic ordering - statement: \""
+ catalogStmt.getSqltext()
+ "\", reason: "
+ catalogStmt.getNondeterminismdetail();
// throw compiler.new VoltCompilerException(rwPotentialErrMsg);
warnMsg = rwPotentialErrMsg;
} else {
warnMsg =
"Procedure "
+ shortName
+ " has a statement with a non-deterministic result - statement: \""
+ catalogStmt.getSqltext()
+ "\", reason: "
+ catalogStmt.getNondeterminismdetail();
}
compiler.addWarn(warnMsg);
}
}
// set procedure parameter types
CatalogMap<ProcParameter> params = procedure.getParameters();
Class<?>[] paramTypes = lang.accept(procedureEntryPointParametersTypeExtractor, fields);
for (int i = 0; i < paramTypes.length; i++) {
Class<?> cls = paramTypes[i];
ProcParameter param = params.add(String.valueOf(i));
param.setIndex(i);
// handle the case where the param is an array
if (cls.isArray()) {
param.setIsarray(true);
cls = cls.getComponentType();
} else param.setIsarray(false);
// boxed types are not supported parameters at this time
if ((cls == Long.class)
|| (cls == Integer.class)
|| (cls == Short.class)
|| (cls == Byte.class)
|| (cls == Double.class)
|| (cls == Character.class)
|| (cls == Boolean.class)) {
String msg = "Procedure: " + shortName + " has a parameter with a boxed type: ";
msg += cls.getSimpleName();
msg +=
". Replace this parameter with the corresponding primitive type and the procedure may compile.";
throw compiler.new VoltCompilerException(msg);
} else if ((cls == Float.class) || (cls == float.class)) {
String msg = "Procedure: " + shortName + " has a parameter with type: ";
msg += cls.getSimpleName();
msg += ". Replace this parameter type with double and the procedure may compile.";
throw compiler.new VoltCompilerException(msg);
}
VoltType type;
try {
type = VoltType.typeFromClass(cls);
} catch (VoltTypeException e) {
// handle the case where the type is invalid
String msg = "Procedure: " + shortName + " has a parameter with invalid type: ";
msg += cls.getSimpleName();
throw compiler.new VoltCompilerException(msg);
} catch (RuntimeException e) {
String msg =
"Procedure: " + shortName + " unexpectedly failed a check on a parameter of type: ";
msg += cls.getSimpleName();
msg += " with error: ";
msg += e.toString();
throw compiler.new VoltCompilerException(msg);
}
param.setType(type.getValue());
}
// parse the procinfo
procedure.setSinglepartition(info.singlePartition);
if (info.singlePartition) {
parsePartitionInfo(compiler, db, procedure, info.partitionInfo);
if (procedure.getPartitionparameter() >= paramTypes.length) {
String msg =
"PartitionInfo parameter not a valid parameter for procedure: "
+ procedure.getClassname();
throw compiler.new VoltCompilerException(msg);
}
// check the type of partition parameter meets our high standards
Class<?> partitionType = paramTypes[procedure.getPartitionparameter()];
Class<?>[] validPartitionClzzes = {
Long.class, Integer.class, Short.class, Byte.class,
long.class, int.class, short.class, byte.class,
String.class, byte[].class
};
boolean found = false;
for (Class<?> candidate : validPartitionClzzes) {
if (partitionType == candidate) found = true;
}
if (!found) {
String msg =
"PartitionInfo parameter must be a String or Number for procedure: "
+ procedure.getClassname();
throw compiler.new VoltCompilerException(msg);
}
VoltType columnType = VoltType.get((byte) procedure.getPartitioncolumn().getType());
VoltType paramType = VoltType.typeFromClass(partitionType);
if (!columnType.canExactlyRepresentAnyValueOf(paramType)) {
String msg =
"Type mismatch between partition column and partition parameter for procedure "
+ procedure.getClassname()
+ " may cause overflow or loss of precision.\nPartition column is type "
+ columnType
+ " and partition parameter is type "
+ paramType;
throw compiler.new VoltCompilerException(msg);
} else if (!paramType.canExactlyRepresentAnyValueOf(columnType)) {
String msg =
"Type mismatch between partition column and partition parameter for procedure "
+ procedure.getClassname()
+ " does not allow the full range of partition key values.\nPartition column is type "
+ columnType
+ " and partition parameter is type "
+ paramType;
compiler.addWarn(msg);
}
}
// put the compiled code for this procedure into the jarfile
// need to find the outermost ancestor class for the procedure in the event
// that it's actually an inner (or inner inner...) class.
// addClassToJar recursively adds all the children, which should include this
// class
Class<?> ancestor = procClass;
while (ancestor.getEnclosingClass() != null) {
ancestor = ancestor.getEnclosingClass();
}
compiler.addClassToJar(jarOutput, ancestor);
}
void addInfo(final String msg) {
addInfo(msg, NO_LINE_NUMBER);
}