/**
* Given "INTEGER", returns BasicSqlType(INTEGER). Given "VARCHAR(10)", returns
* BasicSqlType(VARCHAR, 10). Given "NUMERIC(10, 2)", returns BasicSqlType(NUMERIC, 10, 2).
*/
private RelDataType parseTypeString(RelDataTypeFactory typeFactory, String typeString) {
int precision = -1;
int scale = -1;
int open = typeString.indexOf("(");
if (open >= 0) {
int close = typeString.indexOf(")", open);
if (close >= 0) {
String rest = typeString.substring(open + 1, close);
typeString = typeString.substring(0, open);
int comma = rest.indexOf(",");
if (comma >= 0) {
precision = Integer.parseInt(rest.substring(0, comma));
scale = Integer.parseInt(rest.substring(comma));
} else {
precision = Integer.parseInt(rest);
}
}
}
try {
final SqlTypeName typeName = SqlTypeName.valueOf(typeString);
return typeName.allowsPrecScale(true, true)
? typeFactory.createSqlType(typeName, precision, scale)
: typeName.allowsPrecScale(true, false)
? typeFactory.createSqlType(typeName, precision)
: typeFactory.createSqlType(typeName);
} catch (IllegalArgumentException e) {
return typeFactory.createSqlType(SqlTypeName.ANY);
}
}
private RelDataType sqlType(
RelDataTypeFactory typeFactory, int dataType, int precision, int scale, String typeString) {
SqlTypeName sqlTypeName = SqlTypeName.getNameForJdbcType(dataType);
switch (sqlTypeName) {
case ARRAY:
RelDataType component = null;
if (typeString != null && typeString.endsWith(" ARRAY")) {
// E.g. hsqldb gives "INTEGER ARRAY", so we deduce the component type
// "INTEGER".
final String remaining = typeString.substring(0, typeString.length() - " ARRAY".length());
component = parseTypeString(typeFactory, remaining);
}
if (component == null) {
component = typeFactory.createSqlType(SqlTypeName.ANY);
}
return typeFactory.createArrayType(component, -1);
}
if (precision >= 0 && scale >= 0 && sqlTypeName.allowsPrecScale(true, true)) {
return typeFactory.createSqlType(sqlTypeName, precision, scale);
} else if (precision >= 0 && sqlTypeName.allowsPrecNoScale()) {
return typeFactory.createSqlType(sqlTypeName, precision);
} else {
assert sqlTypeName.allowsNoPrecNoScale();
return typeFactory.createSqlType(sqlTypeName);
}
}
public RelDataType inferReturnType(SqlOperatorBinding opBinding) {
assert opBinding.getOperandCount() == 1;
final RelDataType multisetType = opBinding.getOperandType(0);
RelDataType componentType = multisetType.getComponentType();
assert componentType != null : "expected a multiset type: " + multisetType;
final RelDataTypeFactory typeFactory = opBinding.getTypeFactory();
final RelDataType type =
typeFactory.builder().add(SqlUtil.deriveAliasFromOrdinal(0), componentType).build();
return typeFactory.createMultisetType(type, -1);
}
public Boolean areColumnsUnique(ProjectRelBase rel, BitSet columns, boolean ignoreNulls) {
// ProjectRel maps a set of rows to a different set;
// Without knowledge of the mapping function(whether it
// preserves uniqueness), it is only safe to derive uniqueness
// info from the child of a project when the mapping is f(a) => a.
//
// Also need to map the input column set to the corresponding child
// references
List<RexNode> projExprs = rel.getProjects();
BitSet childColumns = new BitSet();
for (int bit : BitSets.toIter(columns)) {
RexNode projExpr = projExprs.get(bit);
if (projExpr instanceof RexInputRef) {
childColumns.set(((RexInputRef) projExpr).getIndex());
} else if (projExpr instanceof RexCall && ignoreNulls) {
// If the expression is a cast such that the types are the same
// except for the nullability, then if we're ignoring nulls,
// it doesn't matter whether the underlying column reference
// is nullable. Check that the types are the same by making a
// nullable copy of both types and then comparing them.
RexCall call = (RexCall) projExpr;
if (call.getOperator() != SqlStdOperatorTable.CAST) {
continue;
}
RexNode castOperand = call.getOperands().get(0);
if (!(castOperand instanceof RexInputRef)) {
continue;
}
RelDataTypeFactory typeFactory = rel.getCluster().getTypeFactory();
RelDataType castType = typeFactory.createTypeWithNullability(projExpr.getType(), true);
RelDataType origType = typeFactory.createTypeWithNullability(castOperand.getType(), true);
if (castType.equals(origType)) {
childColumns.set(((RexInputRef) castOperand).getIndex());
}
} else {
// If the expression will not influence uniqueness of the
// projection, then skip it.
continue;
}
}
// If no columns can affect uniqueness, then return unknown
if (childColumns.cardinality() == 0) {
return null;
}
return RelMetadataQuery.areColumnsUnique(rel.getChild(), childColumns, ignoreNulls);
}
RelProtoDataType getRelDataType(
DatabaseMetaData metaData, String catalogName, String schemaName, String tableName)
throws SQLException {
final ResultSet resultSet = metaData.getColumns(catalogName, schemaName, tableName, null);
// Temporary type factory, just for the duration of this method. Allowable
// because we're creating a proto-type, not a type; before being used, the
// proto-type will be copied into a real type factory.
final RelDataTypeFactory typeFactory = new SqlTypeFactoryImpl();
final RelDataTypeFactory.FieldInfoBuilder fieldInfo = typeFactory.builder();
while (resultSet.next()) {
final String columnName = resultSet.getString(4);
final int dataType = resultSet.getInt(5);
final String typeString = resultSet.getString(6);
final int size = resultSet.getInt(7);
final int scale = resultSet.getInt(9);
RelDataType sqlType = sqlType(typeFactory, dataType, size, scale, typeString);
boolean nullable = resultSet.getBoolean(11);
fieldInfo.add(columnName, sqlType).nullable(nullable);
}
resultSet.close();
return RelDataTypeImpl.proto(fieldInfo.build());
}
private void reduceCasts(RexCall outerCast) {
RexNode[] operands = outerCast.getOperands();
if (operands.length != 1) {
return;
}
RelDataType outerCastType = outerCast.getType();
RelDataType operandType = operands[0].getType();
if (operandType.equals(outerCastType)) {
removableCasts.add(outerCast);
return;
}
// See if the reduction
// CAST((CAST x AS type) AS type NOT NULL)
// -> CAST(x AS type NOT NULL)
// applies. TODO jvs 15-Dec-2008: consider
// similar cases for precision changes.
if (!(operands[0] instanceof RexCall)) {
return;
}
RexCall innerCast = (RexCall) operands[0];
if (innerCast.getOperator() != SqlStdOperatorTable.castFunc) {
return;
}
if (innerCast.getOperands().length != 1) {
return;
}
RelDataTypeFactory typeFactory = preparingStmt.getFarragoTypeFactory();
RelDataType outerTypeNullable = typeFactory.createTypeWithNullability(outerCastType, true);
RelDataType innerTypeNullable = typeFactory.createTypeWithNullability(operandType, true);
if (outerTypeNullable != innerTypeNullable) {
return;
}
if (operandType.isNullable()) {
removableCasts.add(innerCast);
}
}
public static RelDataType createTypeFromProjection(
RelDataType type,
List<String> columnNameList,
RelDataTypeFactory typeFactory,
boolean caseSensitive) {
// If the names in columnNameList and type have case-sensitive differences,
// the resulting type will use those from type. These are presumably more
// canonical.
final List<RelDataTypeField> fields = new ArrayList<RelDataTypeField>(columnNameList.size());
for (String name : columnNameList) {
RelDataTypeField field = type.getField(name, caseSensitive);
fields.add(type.getFieldList().get(field.getIndex()));
}
return typeFactory.createStructType(fields);
}
/**
* Creates a record type with specified field names.
*
* <p>The array of field names may be null, or any of the names within it can be null. We
* recommend using explicit names where possible, because it makes it much easier to figure out
* the intent of fields when looking at planner output.
*
* @param typeFactory Type factory
* @param exprs Expressions
* @param names Field names, may be null, or elements may be null
* @return Record type
*/
public static RelDataType createStructType(
RelDataTypeFactory typeFactory, final RexNode[] exprs, final String[] names) {
return typeFactory.createStructType(
new RelDataTypeFactory.FieldInfo() {
public int getFieldCount() {
return exprs.length;
}
public String getFieldName(int index) {
if (names == null) {
return "$f" + index;
}
final String name = names[index];
if (name == null) {
return "$f" + index;
}
return name;
}
public RelDataType getFieldType(int index) {
return exprs[index].getType();
}
});
}
/** Initializes this catalog reader. */
protected void init() {
final RelDataType intType = typeFactory.createSqlType(SqlTypeName.INTEGER);
final RelDataType varchar10Type = typeFactory.createSqlType(SqlTypeName.VARCHAR, 10);
final RelDataType varchar20Type = typeFactory.createSqlType(SqlTypeName.VARCHAR, 20);
final RelDataType timestampType = typeFactory.createSqlType(SqlTypeName.TIMESTAMP);
final RelDataType booleanType = typeFactory.createSqlType(SqlTypeName.BOOLEAN);
final RelDataType rectilinearCoordType =
typeFactory.createStructType(new RelDataType[] {intType, intType}, new String[] {"X", "Y"});
// TODO jvs 12-Feb-2005: register this canonical instance with type
// factory
addressType =
new ObjectSqlType(
SqlTypeName.STRUCTURED,
new SqlIdentifier("ADDRESS", SqlParserPos.ZERO),
false,
Arrays.asList(
new RelDataTypeFieldImpl("STREET", 0, varchar20Type),
new RelDataTypeFieldImpl("CITY", 1, varchar20Type),
new RelDataTypeFieldImpl("ZIP", 1, intType),
new RelDataTypeFieldImpl("STATE", 1, varchar20Type)),
RelDataTypeComparability.None);
// Register "SALES" schema.
MockSchema salesSchema = new MockSchema("SALES");
registerSchema(salesSchema);
// Register "EMP" table.
MockTable empTable = new MockTable(this, salesSchema, "EMP");
empTable.addColumn("EMPNO", intType);
empTable.addColumn("ENAME", varchar20Type);
empTable.addColumn("JOB", varchar10Type);
empTable.addColumn("MGR", intType);
empTable.addColumn("HIREDATE", timestampType);
empTable.addColumn("SAL", intType);
empTable.addColumn("COMM", intType);
empTable.addColumn("DEPTNO", intType);
empTable.addColumn("SLACKER", booleanType);
registerTable(empTable);
// Register "DEPT" table.
MockTable deptTable = new MockTable(this, salesSchema, "DEPT");
deptTable.addColumn("DEPTNO", intType);
deptTable.addColumn("NAME", varchar10Type);
registerTable(deptTable);
// Register "BONUS" table.
MockTable bonusTable = new MockTable(this, salesSchema, "BONUS");
bonusTable.addColumn("ENAME", varchar20Type);
bonusTable.addColumn("JOB", varchar10Type);
bonusTable.addColumn("SAL", intType);
bonusTable.addColumn("COMM", intType);
registerTable(bonusTable);
// Register "SALGRADE" table.
MockTable salgradeTable = new MockTable(this, salesSchema, "SALGRADE");
salgradeTable.addColumn("GRADE", intType);
salgradeTable.addColumn("LOSAL", intType);
salgradeTable.addColumn("HISAL", intType);
registerTable(salgradeTable);
// Register "EMP_ADDRESS" table
MockTable contactAddressTable = new MockTable(this, salesSchema, "EMP_ADDRESS");
contactAddressTable.addColumn("EMPNO", intType);
contactAddressTable.addColumn("HOME_ADDRESS", addressType);
contactAddressTable.addColumn("MAILING_ADDRESS", addressType);
registerTable(contactAddressTable);
// Register "CUSTOMER" schema.
MockSchema customerSchema = new MockSchema("CUSTOMER");
registerSchema(customerSchema);
// Register "CONTACT" table.
MockTable contactTable = new MockTable(this, customerSchema, "CONTACT");
contactTable.addColumn("CONTACTNO", intType);
contactTable.addColumn("FNAME", varchar10Type);
contactTable.addColumn("LNAME", varchar10Type);
contactTable.addColumn("EMAIL", varchar20Type);
contactTable.addColumn("COORD", rectilinearCoordType);
registerTable(contactTable);
// Register "ACCOUNT" table.
MockTable accountTable = new MockTable(this, customerSchema, "ACCOUNT");
accountTable.addColumn("ACCTNO", intType);
accountTable.addColumn("TYPE", varchar20Type);
accountTable.addColumn("BALANCE", intType);
registerTable(accountTable);
}
public void onRegister(RelDataTypeFactory typeFactory) {
rowType = typeFactory.createStructType(columnList);
collationList = deduceMonotonicity(this);
}
public RelDataType inferReturnType(SqlOperatorBinding opBinding) {
RelDataTypeFactory typeFactory = opBinding.getTypeFactory();
RelDataType type1 = opBinding.getOperandType(0);
RelDataType type2 = opBinding.getOperandType(1);
return typeFactory.createDecimalQuotient(type1, type2);
}
private RelDataType deriveType(
SqlValidator validator,
SqlValidatorScope scope,
SqlCall call,
boolean convertRowArgToColumnList) {
final SqlNode[] operands = call.operands;
RelDataType[] argTypes = new RelDataType[operands.length];
// Scope for operands. Usually the same as 'scope'.
final SqlValidatorScope operandScope = scope.getOperandScope(call);
// Indicate to the validator that we're validating a new function call
validator.pushFunctionCall();
try {
boolean containsRowArg = false;
for (int i = 0; i < operands.length; ++i) {
RelDataType nodeType;
// for row arguments that should be converted to ColumnList
// types, set the nodeType to a ColumnList type but defer
// validating the arguments of the row constructor until we know
// for sure that the row argument maps to a ColumnList type
if (operands[i].getKind() == SqlKind.ROW && convertRowArgToColumnList) {
containsRowArg = true;
RelDataTypeFactory typeFactory = validator.getTypeFactory();
nodeType = typeFactory.createSqlType(SqlTypeName.COLUMN_LIST);
} else {
nodeType = validator.deriveType(operandScope, operands[i]);
}
validator.setValidatedNodeType(operands[i], nodeType);
argTypes[i] = nodeType;
}
SqlFunction function =
SqlUtil.lookupRoutine(
validator.getOperatorTable(), getNameAsId(), argTypes, getFunctionType());
// if we have a match on function name and parameter count, but
// couldn't find a function with a COLUMN_LIST type, retry, but
// this time, don't convert the row argument to a COLUMN_LIST type;
// if we did find a match, go back and revalidate the row operands
// (corresponding to column references), now that we can set the
// scope to that of the source cursor referenced by that ColumnList
// type
if (containsRowArg) {
if ((function == null)
&& SqlUtil.matchRoutinesByParameterCount(
validator.getOperatorTable(), getNameAsId(), argTypes, getFunctionType())) {
// remove the already validated node types corresponding to
// row arguments before revalidating
for (SqlNode operand : operands) {
if (operand.getKind() == SqlKind.ROW) {
validator.removeValidatedNodeType(operand);
}
}
return deriveType(validator, scope, call, false);
} else if (function != null) {
validator.validateColumnListParams(function, argTypes, operands);
}
}
if (getFunctionType() == SqlFunctionCategory.UserDefinedConstructor) {
return validator.deriveConstructorType(scope, call, this, function, argTypes);
}
if (function == null) {
validator.handleUnresolvedFunction(call, this, argTypes);
}
// REVIEW jvs 25-Mar-2005: This is, in a sense, expanding
// identifiers, but we ignore shouldExpandIdentifiers()
// because otherwise later validation code will
// choke on the unresolved function.
call.setOperator(function);
return function.validateOperands(validator, operandScope, call);
} finally {
validator.popFunctionCall();
}
}