Java Code Examples for org.apache.calcite.sql.SqlLiteral#getValue()
The following examples show how to use
org.apache.calcite.sql.SqlLiteral#getValue() .
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Example 1
| Source File: ExplainHandler.java From Bats with Apache License 2.0 | 6 votes |
|
@Override
public SqlNode rewrite(SqlNode sqlNode) throws RelConversionException, ForemanSetupException {
SqlExplain node = unwrap(sqlNode, SqlExplain.class);
SqlLiteral op = node.operand(2);
SqlExplain.Depth depth = (SqlExplain.Depth) op.getValue();
if (node.getDetailLevel() != null) {
level = node.getDetailLevel();
}
switch (depth) {
case LOGICAL:
mode = ResultMode.LOGICAL;
break;
case PHYSICAL:
mode = ResultMode.PHYSICAL;
break;
default:
throw new UnsupportedOperationException("Unknown depth " + depth);
}
return node.operand(0);
}
Example 2
| Source File: MssqlSqlDialect.java From Bats with Apache License 2.0 | 5 votes |
|
/**
* Unparses datetime floor for Microsoft SQL Server.
* There is no TRUNC function, so simulate this using calls to CONVERT.
*
* @param writer Writer
* @param call Call
*/
private void unparseFloor(SqlWriter writer, SqlCall call) {
SqlLiteral node = call.operand(1);
TimeUnitRange unit = (TimeUnitRange) node.getValue();
switch (unit) {
case YEAR:
unparseFloorWithUnit(writer, call, 4, "-01-01");
break;
case MONTH:
unparseFloorWithUnit(writer, call, 7, "-01");
break;
case WEEK:
writer.print("CONVERT(DATETIME, CONVERT(VARCHAR(10), "
+ "DATEADD(day, - (6 + DATEPART(weekday, ");
call.operand(0).unparse(writer, 0, 0);
writer.print(")) % 7, ");
call.operand(0).unparse(writer, 0, 0);
writer.print("), 126))");
break;
case DAY:
unparseFloorWithUnit(writer, call, 10, "");
break;
case HOUR:
unparseFloorWithUnit(writer, call, 13, ":00:00");
break;
case MINUTE:
unparseFloorWithUnit(writer, call, 16, ":00");
break;
case SECOND:
unparseFloorWithUnit(writer, call, 19, ":00");
break;
default:
throw new IllegalArgumentException("MSSQL does not support FLOOR for time unit: "
+ unit);
}
}
Example 3
| Source File: SetOptionHandler.java From Bats with Apache License 2.0 | 5 votes |
|
private static Object sqlLiteralToObject(final SqlLiteral literal) {
final Object object = literal.getValue();
final SqlTypeName typeName = literal.getTypeName();
switch (typeName) {
case DECIMAL: {
final BigDecimal bigDecimal = (BigDecimal) object;
if (bigDecimal.scale() == 0) {
return bigDecimal.longValue();
} else {
return bigDecimal.doubleValue();
}
}
case DOUBLE:
case FLOAT:
return ((BigDecimal) object).doubleValue();
case SMALLINT:
case TINYINT:
case BIGINT:
case INTEGER:
return ((BigDecimal) object).longValue();
case VARBINARY:
case VARCHAR:
case CHAR:
return ((NlsString) object).getValue().toString();
case BOOLEAN:
return object;
default:
throw UserException.validationError()
.message("Drill doesn't support assigning literals of type %s in SET statements.", typeName)
.build(logger);
}
}
Example 4
| Source File: SqlValidatorImpl.java From Flink-CEPplus with Apache License 2.0 | 5 votes |
|
private void validateLiteralAsDouble(SqlLiteral literal) {
BigDecimal bd = (BigDecimal) literal.getValue();
double d = bd.doubleValue();
if (Double.isInfinite(d) || Double.isNaN(d)) {
// overflow
throw newValidationError(literal,
RESOURCE.numberLiteralOutOfRange(Util.toScientificNotation(bd)));
}
// REVIEW jvs 4-Aug-2004: what about underflow?
}
Example 5
| Source File: SqlValidatorImpl.java From flink with Apache License 2.0 | 5 votes |
|
private void validateLiteralAsDouble(SqlLiteral literal) {
BigDecimal bd = (BigDecimal) literal.getValue();
double d = bd.doubleValue();
if (Double.isInfinite(d) || Double.isNaN(d)) {
// overflow
throw newValidationError(literal,
RESOURCE.numberLiteralOutOfRange(Util.toScientificNotation(bd)));
}
// REVIEW jvs 4-Aug-2004: what about underflow?
}
Example 6
| Source File: AlterTableSetOptionHandler.java From dremio-oss with Apache License 2.0 | 5 votes |
|
private static AttributeValue createAttributeValue(final SqlLiteral literal) {
final Object object = literal.getValue();
final SqlTypeName typeName = literal.getTypeName();
switch (typeName) {
case DOUBLE:
case FLOAT:
return AttributeValue.of(((BigDecimal) object).doubleValue());
case SMALLINT:
case TINYINT:
case BIGINT:
case INTEGER:
return AttributeValue.of(((BigDecimal) object).longValue());
case VARBINARY:
case VARCHAR:
case CHAR:
return AttributeValue.of(((NlsString) object).getValue());
case BOOLEAN:
return AttributeValue.of((Boolean) object);
default:
throw UserException.validationError()
.message("Dremio doesn't support assigning literals of type %s in SET statements.", typeName)
.buildSilently();
}
}
Example 7
| Source File: SetOptionHandler.java From dremio-oss with Apache License 2.0 | 5 votes |
|
private static OptionValue createOptionValue(final String name, final OptionValue.OptionType type,
final SqlLiteral literal) {
final Object object = literal.getValue();
final SqlTypeName typeName = literal.getTypeName();
switch (typeName) {
case DECIMAL: {
final BigDecimal bigDecimal = (BigDecimal) object;
if (bigDecimal.scale() == 0) {
return OptionValue.createLong(type, name, bigDecimal.longValue());
} else {
return OptionValue.createDouble(type, name, bigDecimal.doubleValue());
}
}
case DOUBLE:
case FLOAT:
return OptionValue.createDouble(type, name, ((BigDecimal) object).doubleValue());
case SMALLINT:
case TINYINT:
case BIGINT:
case INTEGER:
return OptionValue.createLong(type, name, ((BigDecimal) object).longValue());
case VARBINARY:
case VARCHAR:
case CHAR:
return OptionValue.createString(type, name, ((NlsString) object).getValue());
case BOOLEAN:
return OptionValue.createBoolean(type, name, (Boolean) object);
default:
throw UserException.validationError()
.message("Dremio doesn't support assigning literals of type %s in SET statements.", typeName)
.build(logger);
}
}
Example 8
| Source File: MssqlSqlDialect.java From calcite with Apache License 2.0 | 5 votes |
|
/**
* Unparses datetime floor for Microsoft SQL Server.
* There is no TRUNC function, so simulate this using calls to CONVERT.
*
* @param writer Writer
* @param call Call
*/
private void unparseFloor(SqlWriter writer, SqlCall call) {
SqlLiteral node = call.operand(1);
TimeUnitRange unit = (TimeUnitRange) node.getValue();
switch (unit) {
case YEAR:
unparseFloorWithUnit(writer, call, 4, "-01-01");
break;
case MONTH:
unparseFloorWithUnit(writer, call, 7, "-01");
break;
case WEEK:
writer.print("CONVERT(DATETIME, CONVERT(VARCHAR(10), "
+ "DATEADD(day, - (6 + DATEPART(weekday, ");
call.operand(0).unparse(writer, 0, 0);
writer.print(")) % 7, ");
call.operand(0).unparse(writer, 0, 0);
writer.print("), 126))");
break;
case DAY:
unparseFloorWithUnit(writer, call, 10, "");
break;
case HOUR:
unparseFloorWithUnit(writer, call, 13, ":00:00");
break;
case MINUTE:
unparseFloorWithUnit(writer, call, 16, ":00");
break;
case SECOND:
unparseFloorWithUnit(writer, call, 19, ":00");
break;
default:
throw new IllegalArgumentException("MSSQL does not support FLOOR for time unit: "
+ unit);
}
}
Example 9
| Source File: ClickHouseSqlDialect.java From calcite with Apache License 2.0 | 5 votes |
|
/**
* Unparses datetime floor for ClickHouse.
*
* @param writer Writer
* @param call Call
*/
private void unparseFloor(SqlWriter writer, SqlCall call) {
final SqlLiteral timeUnitNode = call.operand(1);
TimeUnitRange unit = (TimeUnitRange) timeUnitNode.getValue();
String funName;
switch (unit) {
case YEAR:
funName = "toStartOfYear";
break;
case MONTH:
funName = "toStartOfMonth";
break;
case WEEK:
funName = "toMonday";
break;
case DAY:
funName = "toDate";
break;
case HOUR:
funName = "toStartOfHour";
break;
case MINUTE:
funName = "toStartOfMinute";
break;
default:
throw new RuntimeException("ClickHouse does not support FLOOR for time unit: "
+ unit);
}
writer.print(funName);
SqlWriter.Frame frame = writer.startList("(", ")");
call.operand(0).unparse(writer, 0, 0);
writer.endList(frame);
}
Example 10
| Source File: SqlNodeToRexConverterImpl.java From Bats with Apache License 2.0 | 4 votes |
|
public RexNode convertLiteral(
SqlRexContext cx,
SqlLiteral literal) {
RexBuilder rexBuilder = cx.getRexBuilder();
RelDataTypeFactory typeFactory = cx.getTypeFactory();
SqlValidator validator = cx.getValidator();
if (literal.getValue() == null) {
// Since there is no eq. RexLiteral of SqlLiteral.Unknown we
// treat it as a cast(null as boolean)
RelDataType type;
if (literal.getTypeName() == SqlTypeName.BOOLEAN) {
type = typeFactory.createSqlType(SqlTypeName.BOOLEAN);
type = typeFactory.createTypeWithNullability(type, true);
} else {
type = validator.getValidatedNodeType(literal);
}
return rexBuilder.makeCast(
type,
rexBuilder.constantNull());
}
BitString bitString;
SqlIntervalLiteral.IntervalValue intervalValue;
long l;
switch (literal.getTypeName()) {
case DECIMAL:
// exact number
BigDecimal bd = literal.getValueAs(BigDecimal.class);
return rexBuilder.makeExactLiteral(
bd,
literal.createSqlType(typeFactory));
case DOUBLE:
// approximate type
// TODO: preserve fixed-point precision and large integers
return rexBuilder.makeApproxLiteral(literal.getValueAs(BigDecimal.class));
case CHAR:
return rexBuilder.makeCharLiteral(literal.getValueAs(NlsString.class));
case BOOLEAN:
return rexBuilder.makeLiteral(literal.getValueAs(Boolean.class));
case BINARY:
bitString = literal.getValueAs(BitString.class);
Preconditions.checkArgument((bitString.getBitCount() % 8) == 0,
"incomplete octet");
// An even number of hexits (e.g. X'ABCD') makes whole number
// of bytes.
ByteString byteString = new ByteString(bitString.getAsByteArray());
return rexBuilder.makeBinaryLiteral(byteString);
case SYMBOL:
return rexBuilder.makeFlag(literal.getValueAs(Enum.class));
case TIMESTAMP:
return rexBuilder.makeTimestampLiteral(
literal.getValueAs(TimestampString.class),
((SqlTimestampLiteral) literal).getPrec());
case TIME:
return rexBuilder.makeTimeLiteral(
literal.getValueAs(TimeString.class),
((SqlTimeLiteral) literal).getPrec());
case DATE:
return rexBuilder.makeDateLiteral(literal.getValueAs(DateString.class));
case INTERVAL_YEAR:
case INTERVAL_YEAR_MONTH:
case INTERVAL_MONTH:
case INTERVAL_DAY:
case INTERVAL_DAY_HOUR:
case INTERVAL_DAY_MINUTE:
case INTERVAL_DAY_SECOND:
case INTERVAL_HOUR:
case INTERVAL_HOUR_MINUTE:
case INTERVAL_HOUR_SECOND:
case INTERVAL_MINUTE:
case INTERVAL_MINUTE_SECOND:
case INTERVAL_SECOND:
SqlIntervalQualifier sqlIntervalQualifier =
literal.getValueAs(SqlIntervalLiteral.IntervalValue.class)
.getIntervalQualifier();
return rexBuilder.makeIntervalLiteral(
literal.getValueAs(BigDecimal.class),
sqlIntervalQualifier);
default:
throw Util.unexpected(literal.getTypeName());
}
}
Example 11
| Source File: SqlLiteralChainOperator.java From Bats with Apache License 2.0 | 4 votes |
|
public void unparse(
SqlWriter writer,
SqlCall call,
int leftPrec,
int rightPrec) {
final SqlWriter.Frame frame = writer.startList("", "");
SqlCollation collation = null;
for (Ord<SqlNode> operand : Ord.zip(call.getOperandList())) {
SqlLiteral rand = (SqlLiteral) operand.e;
if (operand.i > 0) {
// SQL:2003 says there must be a newline between string
// fragments.
writer.newlineAndIndent();
}
if (rand instanceof SqlCharStringLiteral) {
NlsString nls = ((SqlCharStringLiteral) rand).getNlsString();
if (operand.i == 0) {
collation = nls.getCollation();
// print with prefix
writer.literal(nls.asSql(true, false));
} else {
// print without prefix
writer.literal(nls.asSql(false, false));
}
} else if (operand.i == 0) {
// print with prefix
rand.unparse(writer, leftPrec, rightPrec);
} else {
// print without prefix
if (rand.getTypeName() == SqlTypeName.BINARY) {
BitString bs = (BitString) rand.getValue();
writer.literal("'" + bs.toHexString() + "'");
} else {
writer.literal("'" + rand.toValue() + "'");
}
}
}
if (collation != null) {
collation.unparse(writer, 0, 0);
}
writer.endList(frame);
}
Example 12
| Source File: SqlValidatorImpl.java From Flink-CEPplus with Apache License 2.0 | 4 votes |
|
public void validateLiteral(SqlLiteral literal) {
switch (literal.getTypeName()) {
case DECIMAL:
// Decimal and long have the same precision (as 64-bit integers), so
// the unscaled value of a decimal must fit into a long.
// REVIEW jvs 4-Aug-2004: This should probably be calling over to
// the available calculator implementations to see what they
// support. For now use ESP instead.
//
// jhyde 2006/12/21: I think the limits should be baked into the
// type system, not dependent on the calculator implementation.
BigDecimal bd = (BigDecimal) literal.getValue();
BigInteger unscaled = bd.unscaledValue();
long longValue = unscaled.longValue();
if (!BigInteger.valueOf(longValue).equals(unscaled)) {
// overflow
throw newValidationError(literal,
RESOURCE.numberLiteralOutOfRange(bd.toString()));
}
break;
case DOUBLE:
validateLiteralAsDouble(literal);
break;
case BINARY:
final BitString bitString = (BitString) literal.getValue();
if ((bitString.getBitCount() % 8) != 0) {
throw newValidationError(literal, RESOURCE.binaryLiteralOdd());
}
break;
case DATE:
case TIME:
case TIMESTAMP:
Calendar calendar = literal.getValueAs(Calendar.class);
final int year = calendar.get(Calendar.YEAR);
final int era = calendar.get(Calendar.ERA);
if (year < 1 || era == GregorianCalendar.BC || year > 9999) {
throw newValidationError(literal,
RESOURCE.dateLiteralOutOfRange(literal.toString()));
}
break;
case INTERVAL_YEAR:
case INTERVAL_YEAR_MONTH:
case INTERVAL_MONTH:
case INTERVAL_DAY:
case INTERVAL_DAY_HOUR:
case INTERVAL_DAY_MINUTE:
case INTERVAL_DAY_SECOND:
case INTERVAL_HOUR:
case INTERVAL_HOUR_MINUTE:
case INTERVAL_HOUR_SECOND:
case INTERVAL_MINUTE:
case INTERVAL_MINUTE_SECOND:
case INTERVAL_SECOND:
if (literal instanceof SqlIntervalLiteral) {
SqlIntervalLiteral.IntervalValue interval =
(SqlIntervalLiteral.IntervalValue)
literal.getValue();
SqlIntervalQualifier intervalQualifier =
interval.getIntervalQualifier();
// ensure qualifier is good before attempting to validate literal
validateIntervalQualifier(intervalQualifier);
String intervalStr = interval.getIntervalLiteral();
// throws CalciteContextException if string is invalid
int[] values = intervalQualifier.evaluateIntervalLiteral(intervalStr,
literal.getParserPosition(), typeFactory.getTypeSystem());
Util.discard(values);
}
break;
default:
// default is to do nothing
}
}
Example 13
| Source File: SqlValidatorImpl.java From flink with Apache License 2.0 | 4 votes |
|
public void validateLiteral(SqlLiteral literal) {
switch (literal.getTypeName()) {
case DECIMAL:
// Decimal and long have the same precision (as 64-bit integers), so
// the unscaled value of a decimal must fit into a long.
// REVIEW jvs 4-Aug-2004: This should probably be calling over to
// the available calculator implementations to see what they
// support. For now use ESP instead.
//
// jhyde 2006/12/21: I think the limits should be baked into the
// type system, not dependent on the calculator implementation.
BigDecimal bd = (BigDecimal) literal.getValue();
BigInteger unscaled = bd.unscaledValue();
long longValue = unscaled.longValue();
if (!BigInteger.valueOf(longValue).equals(unscaled)) {
// overflow
throw newValidationError(literal,
RESOURCE.numberLiteralOutOfRange(bd.toString()));
}
break;
case DOUBLE:
validateLiteralAsDouble(literal);
break;
case BINARY:
final BitString bitString = (BitString) literal.getValue();
if ((bitString.getBitCount() % 8) != 0) {
throw newValidationError(literal, RESOURCE.binaryLiteralOdd());
}
break;
case DATE:
case TIME:
case TIMESTAMP:
Calendar calendar = literal.getValueAs(Calendar.class);
final int year = calendar.get(Calendar.YEAR);
final int era = calendar.get(Calendar.ERA);
if (year < 1 || era == GregorianCalendar.BC || year > 9999) {
throw newValidationError(literal,
RESOURCE.dateLiteralOutOfRange(literal.toString()));
}
break;
case INTERVAL_YEAR:
case INTERVAL_YEAR_MONTH:
case INTERVAL_MONTH:
case INTERVAL_DAY:
case INTERVAL_DAY_HOUR:
case INTERVAL_DAY_MINUTE:
case INTERVAL_DAY_SECOND:
case INTERVAL_HOUR:
case INTERVAL_HOUR_MINUTE:
case INTERVAL_HOUR_SECOND:
case INTERVAL_MINUTE:
case INTERVAL_MINUTE_SECOND:
case INTERVAL_SECOND:
if (literal instanceof SqlIntervalLiteral) {
SqlIntervalLiteral.IntervalValue interval =
(SqlIntervalLiteral.IntervalValue)
literal.getValue();
SqlIntervalQualifier intervalQualifier =
interval.getIntervalQualifier();
// ensure qualifier is good before attempting to validate literal
validateIntervalQualifier(intervalQualifier);
String intervalStr = interval.getIntervalLiteral();
// throws CalciteContextException if string is invalid
int[] values = intervalQualifier.evaluateIntervalLiteral(intervalStr,
literal.getParserPosition(), typeFactory.getTypeSystem());
Util.discard(values);
}
break;
default:
// default is to do nothing
}
}
Example 14
| Source File: ExplainHandler.java From dremio-oss with Apache License 2.0 | 4 votes |
|
@Override
public List<Explain> toResult(String sql, SqlNode sqlNode) throws Exception {
try {
final SqlExplain node = SqlNodeUtil.unwrap(sqlNode, SqlExplain.class);
final SqlLiteral op = node.operand(2);
final SqlExplain.Depth depth = (SqlExplain.Depth) op.getValue();
final ResultMode mode;
SqlExplainLevel level = SqlExplainLevel.ALL_ATTRIBUTES;
if (node.getDetailLevel() != null) {
level = node.getDetailLevel();
}
switch (depth) {
case LOGICAL:
mode = ResultMode.LOGICAL;
break;
case PHYSICAL:
mode = ResultMode.PHYSICAL;
break;
default:
throw new UnsupportedOperationException("Unknown depth " + depth);
}
final SqlNode innerNode = node.operand(0);
// try(DisabledBlock block = toggle.openDisabledBlock()){
Rel drel;
final ConvertedRelNode convertedRelNode = PrelTransformer.validateAndConvert(config, innerNode);
final RelDataType validatedRowType = convertedRelNode.getValidatedRowType();
final RelNode queryRelNode = convertedRelNode.getConvertedNode();
PrelTransformer.log("Calcite", queryRelNode, logger, null);
drel = PrelTransformer.convertToDrel(config, queryRelNode, validatedRowType);
if (mode == ResultMode.LOGICAL) {
return Collections.singletonList(new Explain(RelOptUtil.toString(drel, level)));
}
final Pair<Prel, String> convertToPrel = PrelTransformer.convertToPrel(config, drel);
final String text = convertToPrel.getValue();
return Collections.singletonList(new Explain(text));
// }
} catch (Exception ex){
throw SqlExceptionHelper.coerceException(logger, sql, ex, true);
}
}
Example 15
| Source File: SqlNodeToRexConverterImpl.java From calcite with Apache License 2.0 | 4 votes |
|
public RexNode convertLiteral(
SqlRexContext cx,
SqlLiteral literal) {
RexBuilder rexBuilder = cx.getRexBuilder();
RelDataTypeFactory typeFactory = cx.getTypeFactory();
SqlValidator validator = cx.getValidator();
if (literal.getValue() == null) {
// Since there is no eq. RexLiteral of SqlLiteral.Unknown we
// treat it as a cast(null as boolean)
RelDataType type;
if (literal.getTypeName() == SqlTypeName.BOOLEAN) {
type = typeFactory.createSqlType(SqlTypeName.BOOLEAN);
type = typeFactory.createTypeWithNullability(type, true);
} else {
type = validator.getValidatedNodeType(literal);
}
return rexBuilder.makeNullLiteral(type);
}
BitString bitString;
SqlIntervalLiteral.IntervalValue intervalValue;
long l;
switch (literal.getTypeName()) {
case DECIMAL:
// exact number
BigDecimal bd = literal.getValueAs(BigDecimal.class);
return rexBuilder.makeExactLiteral(
bd,
literal.createSqlType(typeFactory));
case DOUBLE:
// approximate type
// TODO: preserve fixed-point precision and large integers
return rexBuilder.makeApproxLiteral(literal.getValueAs(BigDecimal.class));
case CHAR:
return rexBuilder.makeCharLiteral(literal.getValueAs(NlsString.class));
case BOOLEAN:
return rexBuilder.makeLiteral(literal.getValueAs(Boolean.class));
case BINARY:
bitString = literal.getValueAs(BitString.class);
Preconditions.checkArgument((bitString.getBitCount() % 8) == 0,
"incomplete octet");
// An even number of hexits (e.g. X'ABCD') makes whole number
// of bytes.
ByteString byteString = new ByteString(bitString.getAsByteArray());
return rexBuilder.makeBinaryLiteral(byteString);
case SYMBOL:
return rexBuilder.makeFlag(literal.getValueAs(Enum.class));
case TIMESTAMP:
return rexBuilder.makeTimestampLiteral(
literal.getValueAs(TimestampString.class),
((SqlTimestampLiteral) literal).getPrec());
case TIME:
return rexBuilder.makeTimeLiteral(
literal.getValueAs(TimeString.class),
((SqlTimeLiteral) literal).getPrec());
case DATE:
return rexBuilder.makeDateLiteral(literal.getValueAs(DateString.class));
case INTERVAL_YEAR:
case INTERVAL_YEAR_MONTH:
case INTERVAL_MONTH:
case INTERVAL_DAY:
case INTERVAL_DAY_HOUR:
case INTERVAL_DAY_MINUTE:
case INTERVAL_DAY_SECOND:
case INTERVAL_HOUR:
case INTERVAL_HOUR_MINUTE:
case INTERVAL_HOUR_SECOND:
case INTERVAL_MINUTE:
case INTERVAL_MINUTE_SECOND:
case INTERVAL_SECOND:
SqlIntervalQualifier sqlIntervalQualifier =
literal.getValueAs(SqlIntervalLiteral.IntervalValue.class)
.getIntervalQualifier();
return rexBuilder.makeIntervalLiteral(
literal.getValueAs(BigDecimal.class),
sqlIntervalQualifier);
default:
throw Util.unexpected(literal.getTypeName());
}
}
Example 16
| Source File: SqlLiteralChainOperator.java From calcite with Apache License 2.0 | 4 votes |
|
public void unparse(
SqlWriter writer,
SqlCall call,
int leftPrec,
int rightPrec) {
final SqlWriter.Frame frame = writer.startList("", "");
SqlCollation collation = null;
for (Ord<SqlNode> operand : Ord.zip(call.getOperandList())) {
SqlLiteral rand = (SqlLiteral) operand.e;
if (operand.i > 0) {
// SQL:2003 says there must be a newline between string
// fragments.
writer.newlineAndIndent();
}
if (rand instanceof SqlCharStringLiteral) {
NlsString nls = ((SqlCharStringLiteral) rand).getNlsString();
if (operand.i == 0) {
collation = nls.getCollation();
// print with prefix
writer.literal(nls.asSql(true, false, writer.getDialect()));
} else {
// print without prefix
writer.literal(nls.asSql(false, false, writer.getDialect()));
}
} else if (operand.i == 0) {
// print with prefix
rand.unparse(writer, leftPrec, rightPrec);
} else {
// print without prefix
if (rand.getTypeName() == SqlTypeName.BINARY) {
BitString bs = (BitString) rand.getValue();
writer.literal("'" + bs.toHexString() + "'");
} else {
writer.literal("'" + rand.toValue() + "'");
}
}
}
if (collation != null) {
collation.unparse(writer);
}
writer.endList(frame);
}
