/**
* @see TypeCompiler#resolveArithmeticOperation
* @exception StandardException Thrown on error
*/
public DataTypeDescriptor resolveArithmeticOperation(
DataTypeDescriptor leftType, DataTypeDescriptor rightType, String operator)
throws StandardException {
throw StandardException.newException(
SQLState.LANG_BINARY_OPERATOR_NOT_SUPPORTED,
operator,
leftType.getTypeId().getSQLTypeName(),
rightType.getTypeId().getSQLTypeName());
}
/**
* Get the precision of the operation involving two of the same types. Only meaningful for
* decimals, which override this.
*
* @param operator a string representing the operator, null means no operator, just a type merge
* @param leftType the left type
* @param rightType the left type
* @return the resultant precision
*/
private int getPrecision(
String operator, DataTypeDescriptor leftType, DataTypeDescriptor rightType) {
// Only meaningful for decimal
if (getStoredFormatIdFromTypeId() != StoredFormatIds.DECIMAL_TYPE_ID) {
return leftType.getPrecision();
}
long lscale = (long) leftType.getScale();
long rscale = (long) rightType.getScale();
long lprec = (long) leftType.getPrecision();
long rprec = (long) rightType.getPrecision();
long val;
/*
** Null means datatype merge. Take the maximum
** left of decimal digits plus the scale.
*/
if (operator == null) {
val = this.getScale(operator, leftType, rightType) + Math.max(lprec - lscale, rprec - rscale);
} else if (operator.equals(TypeCompiler.TIMES_OP)) {
val = lprec + rprec;
} else if (operator.equals(TypeCompiler.SUM_OP)) {
val = lprec - lscale + rprec - rscale + this.getScale(operator, leftType, rightType);
} else if (operator.equals(TypeCompiler.DIVIDE_OP)) {
val =
Math.min(
NumberDataValue.MAX_DECIMAL_PRECISION_SCALE,
this.getScale(operator, leftType, rightType) + lprec - lscale + rprec);
}
/*
** AVG, -, +
*/
else {
/*
** Take max scale and max left of decimal
** plus one.
*/
val =
this.getScale(operator, leftType, rightType)
+ Math.max(lprec - lscale, rprec - rscale)
+ 1;
if (val > Limits.DB2_MAX_DECIMAL_PRECISION_SCALE)
// then, like DB2, just set it to the max possible.
val = Limits.DB2_MAX_DECIMAL_PRECISION_SCALE;
}
if (val > Integer.MAX_VALUE) {
val = Integer.MAX_VALUE;
}
val = Math.min(NumberDataValue.MAX_DECIMAL_PRECISION_SCALE, val);
return (int) val;
}
/** @see TypeCompiler#getCastToCharWidth */
public int getCastToCharWidth(DataTypeDescriptor dts) {
int formatId = getStoredFormatIdFromTypeId();
switch (formatId) {
case StoredFormatIds.DECIMAL_TYPE_ID:
// Need to have space for '-' and decimal point.
return dts.getPrecision() + 2;
case StoredFormatIds.DOUBLE_TYPE_ID:
return TypeCompiler.DOUBLE_MAXWIDTH_AS_CHAR;
case StoredFormatIds.INT_TYPE_ID:
return TypeCompiler.INT_MAXWIDTH_AS_CHAR;
case StoredFormatIds.LONGINT_TYPE_ID:
return TypeCompiler.LONGINT_MAXWIDTH_AS_CHAR;
case StoredFormatIds.REAL_TYPE_ID:
return TypeCompiler.REAL_MAXWIDTH_AS_CHAR;
case StoredFormatIds.SMALLINT_TYPE_ID:
return TypeCompiler.SMALLINT_MAXWIDTH_AS_CHAR;
case StoredFormatIds.TINYINT_TYPE_ID:
return TypeCompiler.TINYINT_MAXWIDTH_AS_CHAR;
default:
if (SanityManager.DEBUG) {
SanityManager.THROWASSERT("unexpected formatId in getCastToCharWidth() - " + formatId);
}
return 0;
}
}
/**
* Get the scale of the operation involving two of the same types. Since we don't really have a
* good way to pass the resultant scale and precision around at execution time, we will model that
* BigDecimal does by default. This is good in most cases, though we would probably like to use
* something more sophisticated for division.
*
* @param operator a string representing the operator, null means no operator, just a type merge
* @param leftType the left type
* @param rightType the left type
* @return the resultant precision
*/
private int getScale(String operator, DataTypeDescriptor leftType, DataTypeDescriptor rightType) {
// Only meaningful for decimal
if (getStoredFormatIdFromTypeId() != StoredFormatIds.DECIMAL_TYPE_ID) {
return leftType.getScale();
}
long val;
long lscale = (long) leftType.getScale();
long rscale = (long) rightType.getScale();
long lprec = (long) leftType.getPrecision();
long rprec = (long) rightType.getPrecision();
/*
** Retain greatest scale, take sum of left
** of decimal
*/
if (TypeCompiler.TIMES_OP.equals(operator)) {
val = lscale + rscale;
} else if (TypeCompiler.DIVIDE_OP.equals(operator)) {
/*
** Take max left scale + right precision - right scale + 1,
** or 4, whichever is biggest
*/
LanguageConnectionContext lcc =
(LanguageConnectionContext)
(ContextService.getContext(LanguageConnectionContext.CONTEXT_ID));
// Scale: 31 - left precision + left scale - right scale
val = Math.max(NumberDataValue.MAX_DECIMAL_PRECISION_SCALE - lprec + lscale - rscale, 0);
} else if (TypeCompiler.AVG_OP.equals(operator)) {
val = Math.max(Math.max(lscale, rscale), NumberDataValue.MIN_DECIMAL_DIVIDE_SCALE);
}
/*
** SUM, -, + all take max(lscale,rscale)
*/
else {
val = Math.max(lscale, rscale);
}
if (val > Integer.MAX_VALUE) {
val = Integer.MAX_VALUE;
}
val = Math.min(NumberDataValue.MAX_DECIMAL_PRECISION_SCALE, val);
return (int) val;
}
/**
* Bind this expression. This means binding the sub-expressions, as well as figuring out what the
* return type is for this expression.
*
* @param fromList The FROM list for the query this expression is in, for binding columns.
* @param subqueryList The subquery list being built as we find SubqueryNodes
* @param aggregateVector The aggregate vector being built as we find AggregateNodes
* @return The new top of the expression tree.
* @exception StandardException Thrown on error
*/
public ValueNode bindExpression(
FromList fromList, SubqueryList subqueryList, List aggregateVector) throws StandardException {
// method invocations are not allowed in ADD TABLE clauses.
// And neither are field references.
javaNode.checkReliability(this);
/* Bind the expression under us */
javaNode = javaNode.bindExpression(fromList, subqueryList, aggregateVector);
if (javaNode instanceof StaticMethodCallNode) {
AggregateNode agg = ((StaticMethodCallNode) javaNode).getResolvedAggregate();
if (agg != null) {
return agg.bindExpression(fromList, subqueryList, aggregateVector);
}
}
DataTypeDescriptor dts = javaNode.getDataType();
if (dts == null) {
throw StandardException.newException(
SQLState.LANG_NO_CORRESPONDING_S_Q_L_TYPE, javaNode.getJavaTypeName());
}
TypeDescriptor catalogType = dts.getCatalogType();
if (catalogType.isRowMultiSet() || (catalogType.getTypeName().equals("java.sql.ResultSet"))) {
throw StandardException.newException(SQLState.LANG_TABLE_FUNCTION_NOT_ALLOWED);
}
setType(dts);
// For functions returning string types we should set the collation to match the
// java method's schema DERBY-2972. This is propogated from
// RoutineAliasInfo to javaNode.
if (dts.getTypeId().isStringTypeId()) {
this.setCollationInfo(
javaNode.getCollationType(), StringDataValue.COLLATION_DERIVATION_IMPLICIT);
}
return this;
}
/**
* Create the Constant information that will drive the guts of Execution.
*
* @exception StandardException Thrown on failure
*/
public ConstantAction makeConstantAction() throws StandardException {
TableElementList coldefs = tableElementList;
// for each column, stuff system.column
ColumnInfo[] colInfos = new ColumnInfo[coldefs.countNumberOfColumns()];
int numConstraints = coldefs.genColumnInfos(colInfos);
/* If we've seen a constraint, then build a constraint list */
CreateConstraintConstantAction[] conActions = null;
SchemaDescriptor sd =
getSchemaDescriptor(tableType != TableDescriptor.GLOBAL_TEMPORARY_TABLE_TYPE, true);
if (numConstraints > 0) {
conActions = new CreateConstraintConstantAction[numConstraints];
coldefs.genConstraintActions(true, conActions, getRelativeName(), sd, getDataDictionary());
}
// if the any of columns are "long" and user has not specified a
// page size, set the pagesize to 32k.
// Also in case where the approximate sum of the column sizes is
// greater than the bump threshold , bump the pagesize to 32k
boolean table_has_long_column = false;
int approxLength = 0;
for (int i = 0; i < colInfos.length; i++) {
DataTypeDescriptor dts = colInfos[i].dataType;
if (dts.getTypeId().isLongConcatableTypeId()) {
table_has_long_column = true;
break;
}
approxLength += dts.getTypeId().getApproximateLengthInBytes(dts);
}
if (table_has_long_column || (approxLength > Property.TBL_PAGE_SIZE_BUMP_THRESHOLD)) {
if (((properties == null) || (properties.get(Property.PAGE_SIZE_PARAMETER) == null))
&& (PropertyUtil.getServiceProperty(
getLanguageConnectionContext().getTransactionCompile(),
Property.PAGE_SIZE_PARAMETER)
== null)) {
// do not override the user's choice of page size, whether it
// is set for the whole database or just set on this statement.
if (properties == null) properties = new Properties();
properties.put(Property.PAGE_SIZE_PARAMETER, Property.PAGE_SIZE_DEFAULT_LONG);
}
}
return (getGenericConstantActionFactory()
.getCreateTableConstantAction(
sd.getSchemaName(),
getRelativeName(),
tableType,
colInfos,
conActions,
properties,
lockGranularity,
onCommitDeleteRows,
onRollbackDeleteRows));
}
/**
* Bind this CreateTableNode. This means doing any static error checking that can be done before
* actually creating the base table or declaring the global temporary table. For eg, verifying
* that the TableElementList does not contain any duplicate column names.
*
* @exception StandardException Thrown on error
*/
public void bindStatement() throws StandardException {
DataDictionary dataDictionary = getDataDictionary();
int numPrimaryKeys = 0;
int numCheckConstraints = 0;
int numReferenceConstraints = 0;
int numUniqueConstraints = 0;
int numGenerationClauses = 0;
SchemaDescriptor sd =
getSchemaDescriptor(tableType != TableDescriptor.GLOBAL_TEMPORARY_TABLE_TYPE, true);
if (queryExpression != null) {
FromList fromList =
(FromList)
getNodeFactory()
.getNode(
C_NodeTypes.FROM_LIST,
getNodeFactory().doJoinOrderOptimization(),
getContextManager());
CompilerContext cc = getCompilerContext();
ProviderList prevAPL = cc.getCurrentAuxiliaryProviderList();
ProviderList apl = new ProviderList();
try {
cc.setCurrentAuxiliaryProviderList(apl);
cc.pushCurrentPrivType(Authorizer.SELECT_PRIV);
/* Bind the tables in the queryExpression */
queryExpression = queryExpression.bindNonVTITables(dataDictionary, fromList);
queryExpression = queryExpression.bindVTITables(fromList);
/* Bind the expressions under the resultSet */
queryExpression.bindExpressions(fromList);
/* Bind the query expression */
queryExpression.bindResultColumns(fromList);
/* Reject any untyped nulls in the RCL */
/* e.g. CREATE TABLE t1 (x) AS VALUES NULL WITH NO DATA */
queryExpression.bindUntypedNullsToResultColumns(null);
} finally {
cc.popCurrentPrivType();
cc.setCurrentAuxiliaryProviderList(prevAPL);
}
/* If there is an RCL for the table definition then copy the
* names to the queryExpression's RCL after verifying that
* they both have the same size.
*/
ResultColumnList qeRCL = queryExpression.getResultColumns();
if (resultColumns != null) {
if (resultColumns.size() != qeRCL.visibleSize()) {
throw StandardException.newException(
SQLState.LANG_TABLE_DEFINITION_R_C_L_MISMATCH, getFullName());
}
qeRCL.copyResultColumnNames(resultColumns);
}
int schemaCollationType = sd.getCollationType();
/* Create table element list from columns in query expression */
tableElementList = new TableElementList();
for (int index = 0; index < qeRCL.size(); index++) {
ResultColumn rc = (ResultColumn) qeRCL.elementAt(index);
if (rc.isGenerated()) {
continue;
}
/* Raise error if column name is system generated. */
if (rc.isNameGenerated()) {
throw StandardException.newException(SQLState.LANG_TABLE_REQUIRES_COLUMN_NAMES);
}
DataTypeDescriptor dtd = rc.getExpression().getTypeServices();
if ((dtd != null) && !dtd.isUserCreatableType()) {
throw StandardException.newException(
SQLState.LANG_INVALID_COLUMN_TYPE_CREATE_TABLE,
dtd.getFullSQLTypeName(),
rc.getName());
}
// DERBY-2879 CREATE TABLE AS <subquery> does not maintain the
// collation for character types.
// eg for a territory based collation database
// create table t as select tablename from sys.systables with no data;
// Derby at this point does not support for a table's character
// columns to have a collation different from it's schema's
// collation. Which means that in a territory based database,
// the query above will cause table t's character columns to
// have collation of UCS_BASIC but the containing schema of t
// has collation of territory based. This is not supported and
// hence we will throw an exception below for the query above in
// a territory based database.
if (dtd.getTypeId().isStringTypeId() && dtd.getCollationType() != schemaCollationType) {
throw StandardException.newException(
SQLState.LANG_CAN_NOT_CREATE_TABLE,
dtd.getCollationName(),
DataTypeDescriptor.getCollationName(schemaCollationType));
}
ColumnDefinitionNode column =
(ColumnDefinitionNode)
getNodeFactory()
.getNode(
C_NodeTypes.COLUMN_DEFINITION_NODE,
rc.getName(),
null,
rc.getType(),
null,
getContextManager());
tableElementList.addTableElement(column);
}
} else {
// Set the collation type and collation derivation of all the
// character type columns. Their collation type will be same as the
// collation of the schema they belong to. Their collation
// derivation will be "implicit".
// Earlier we did this in makeConstantAction but that is little too
// late (DERBY-2955)
// eg
// CREATE TABLE STAFF9 (EMPNAME CHAR(20),
// CONSTRAINT STAFF9_EMPNAME CHECK (EMPNAME NOT LIKE 'T%'))
// For the query above, when run in a territory based db, we need
// to have the correct collation set in bind phase of create table
// so that when LIKE is handled in LikeEscapeOperatorNode, we have
// the correct collation set for EMPNAME otherwise it will throw an
// exception for 'T%' having collation of territory based and
// EMPNAME having the default collation of UCS_BASIC
tableElementList.setCollationTypesOnCharacterStringColumns(
getSchemaDescriptor(tableType != TableDescriptor.GLOBAL_TEMPORARY_TABLE_TYPE, true));
}
tableElementList.validate(this, dataDictionary, (TableDescriptor) null);
/* Only 1012 columns allowed per table */
if (tableElementList.countNumberOfColumns() > Limits.DB2_MAX_COLUMNS_IN_TABLE) {
throw StandardException.newException(
SQLState.LANG_TOO_MANY_COLUMNS_IN_TABLE_OR_VIEW,
String.valueOf(tableElementList.countNumberOfColumns()),
getRelativeName(),
String.valueOf(Limits.DB2_MAX_COLUMNS_IN_TABLE));
}
numPrimaryKeys = tableElementList.countConstraints(DataDictionary.PRIMARYKEY_CONSTRAINT);
/* Only 1 primary key allowed per table */
if (numPrimaryKeys > 1) {
throw StandardException.newException(
SQLState.LANG_TOO_MANY_PRIMARY_KEY_CONSTRAINTS, getRelativeName());
}
/* Check the validity of all check constraints */
numCheckConstraints = tableElementList.countConstraints(DataDictionary.CHECK_CONSTRAINT);
numReferenceConstraints =
tableElementList.countConstraints(DataDictionary.FOREIGNKEY_CONSTRAINT);
numUniqueConstraints = tableElementList.countConstraints(DataDictionary.UNIQUE_CONSTRAINT);
numGenerationClauses = tableElementList.countGenerationClauses();
// temp tables can't have primary key or check or foreign key or unique constraints defined on
// them
if ((tableType == TableDescriptor.GLOBAL_TEMPORARY_TABLE_TYPE)
&& (numPrimaryKeys > 0
|| numCheckConstraints > 0
|| numReferenceConstraints > 0
|| numUniqueConstraints > 0))
throw StandardException.newException(
SQLState.LANG_NOT_ALLOWED_FOR_DECLARED_GLOBAL_TEMP_TABLE);
// each of these constraints have a backing index in the back. We need to make sure that a table
// never has more
// more than 32767 indexes on it and that is why this check.
if ((numPrimaryKeys + numReferenceConstraints + numUniqueConstraints)
> Limits.DB2_MAX_INDEXES_ON_TABLE) {
throw StandardException.newException(
SQLState.LANG_TOO_MANY_INDEXES_ON_TABLE,
String.valueOf(numPrimaryKeys + numReferenceConstraints + numUniqueConstraints),
getRelativeName(),
String.valueOf(Limits.DB2_MAX_INDEXES_ON_TABLE));
}
if ((numCheckConstraints > 0) || (numGenerationClauses > 0) || (numReferenceConstraints > 0)) {
/* In order to check the validity of the check constraints and
* generation clauses
* we must goober up a FromList containing a single table,
* the table being created, with an RCL containing the
* new columns and their types. This will allow us to
* bind the constraint definition trees against that
* FromList. When doing this, we verify that there are
* no nodes which can return non-deterministic results.
*/
FromList fromList = makeFromList(null, tableElementList, true);
FormatableBitSet generatedColumns = new FormatableBitSet();
/* Now that we've finally goobered stuff up, bind and validate
* the check constraints and generation clauses.
*/
if (numGenerationClauses > 0) {
tableElementList.bindAndValidateGenerationClauses(sd, fromList, generatedColumns, null);
}
if (numCheckConstraints > 0) {
tableElementList.bindAndValidateCheckConstraints(fromList);
}
if (numReferenceConstraints > 0) {
tableElementList.validateForeignKeysOnGenerationClauses(fromList, generatedColumns);
}
}
if (numPrimaryKeys > 0) {
tableElementList.validatePrimaryKeyNullability();
}
}
/**
* @see TypeCompiler#resolveArithmeticOperation
* @exception StandardException Thrown on error
*/
public DataTypeDescriptor resolveArithmeticOperation(
DataTypeDescriptor leftType, DataTypeDescriptor rightType, String operator)
throws StandardException {
NumericTypeCompiler higherTC;
DataTypeDescriptor higherType;
boolean nullable;
int precision, scale, maximumWidth;
/*
** Check the right type to be sure it's a number. By convention,
** we call this method off the TypeId of the left operand, so if
** we get here, we know the left operand is a number.
*/
if (SanityManager.DEBUG)
SanityManager.ASSERT(
leftType.getTypeId().isNumericTypeId(),
"The left type is supposed to be a number because we're resolving an arithmetic operator");
TypeId leftTypeId = leftType.getTypeId();
TypeId rightTypeId = rightType.getTypeId();
boolean supported = true;
if (!(rightTypeId.isNumericTypeId())) {
supported = false;
}
if (TypeCompiler.MOD_OP.equals(operator)) {
switch (leftTypeId.getJDBCTypeId()) {
case java.sql.Types.TINYINT:
case java.sql.Types.SMALLINT:
case java.sql.Types.INTEGER:
case java.sql.Types.BIGINT:
break;
default:
supported = false;
break;
}
switch (rightTypeId.getJDBCTypeId()) {
case java.sql.Types.TINYINT:
case java.sql.Types.SMALLINT:
case java.sql.Types.INTEGER:
case java.sql.Types.BIGINT:
break;
default:
supported = false;
break;
}
}
if (!supported) {
throw StandardException.newException(
SQLState.LANG_BINARY_OPERATOR_NOT_SUPPORTED,
operator,
leftType.getTypeId().getSQLTypeName(),
rightType.getTypeId().getSQLTypeName());
}
/*
** Take left as the higher precedence if equal
*/
if (rightTypeId.typePrecedence() > leftTypeId.typePrecedence()) {
higherType = rightType;
higherTC = (NumericTypeCompiler) getTypeCompiler(rightTypeId);
} else {
higherType = leftType;
higherTC = (NumericTypeCompiler) getTypeCompiler(leftTypeId);
}
/* The calculation of precision and scale should be based upon
* the type with higher precedence, which is going to be the result
* type, this is also to be consistent with maximumWidth. Beetle 3906.
*/
precision = higherTC.getPrecision(operator, leftType, rightType);
scale = higherTC.getScale(operator, leftType, rightType);
if (higherType.getTypeId().isDecimalTypeId()) {
maximumWidth = (scale > 0) ? precision + 3 : precision + 1;
/*
** Be careful not to overflow
*/
if (maximumWidth < precision) {
maximumWidth = Integer.MAX_VALUE;
}
} else {
maximumWidth = higherType.getMaximumWidth();
}
/* The result is nullable if either side is nullable */
nullable = leftType.isNullable() || rightType.isNullable();
/*
** The higher type does not have the right nullability. Create a
** new DataTypeDescriptor that has the correct type and nullability.
**
** It's OK to call the implementation of the DataTypeDescriptorFactory
** here, because we're in the same package.
*/
return new DataTypeDescriptor(higherType.getTypeId(), precision, scale, nullable, maximumWidth);
}