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https://issues.apache.org/jira/browse/PARQUET-1253?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16462219#comment-16462219
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ASF GitHub Bot commented on PARQUET-1253:
-----------------------------------------
gszadovszky commented on a change in pull request #463: PARQUET-1253: Support
for new logical type representation
URL: https://github.com/apache/parquet-mr/pull/463#discussion_r185746812
##########
File path:
parquet-column/src/main/java/org/apache/parquet/schema/LogicalTypeAnnotation.java
##########
@@ -77,63 +77,116 @@ static LogicalTypeAnnotation
fromOriginalType(OriginalType originalType, Decimal
}
switch (originalType) {
case UTF8:
- return StringLogicalTypeAnnotation.create();
+ return stringType();
case MAP:
- return MapLogicalTypeAnnotation.create();
+ return mapType();
case DECIMAL:
int scale = (decimalMetadata == null ? 0 : decimalMetadata.getScale());
int precision = (decimalMetadata == null ? 0 :
decimalMetadata.getPrecision());
- return DecimalLogicalTypeAnnotation.create(scale, precision);
+ return decimalType(scale, precision);
case LIST:
- return ListLogicalTypeAnnotation.create();
+ return listType();
case DATE:
- return DateLogicalTypeAnnotation.create();
+ return dateType();
case INTERVAL:
- return IntervalLogicalTypeAnnotation.create();
+ return intervalType();
case TIMESTAMP_MILLIS:
- return TimestampLogicalTypeAnnotation.create(true,
LogicalTypeAnnotation.TimeUnit.MILLIS);
+ return timestampType(true, LogicalTypeAnnotation.TimeUnit.MILLIS);
case TIMESTAMP_MICROS:
- return TimestampLogicalTypeAnnotation.create(true,
LogicalTypeAnnotation.TimeUnit.MICROS);
+ return timestampType(true, LogicalTypeAnnotation.TimeUnit.MICROS);
case TIME_MILLIS:
- return TimeLogicalTypeAnnotation.create(true,
LogicalTypeAnnotation.TimeUnit.MILLIS);
+ return timeType(true, LogicalTypeAnnotation.TimeUnit.MILLIS);
case TIME_MICROS:
- return TimeLogicalTypeAnnotation.create(true,
LogicalTypeAnnotation.TimeUnit.MICROS);
+ return timeType(true, LogicalTypeAnnotation.TimeUnit.MICROS);
case UINT_8:
- return IntLogicalTypeAnnotation.create(8, false);
+ return intType(8, false);
case UINT_16:
- return IntLogicalTypeAnnotation.create(16, false);
+ return intType(16, false);
case UINT_32:
- return IntLogicalTypeAnnotation.create(32, false);
+ return intType(32, false);
case UINT_64:
- return IntLogicalTypeAnnotation.create(64, false);
+ return intType(64, false);
case INT_8:
- return IntLogicalTypeAnnotation.create(8, true);
+ return intType(8, true);
case INT_16:
- return IntLogicalTypeAnnotation.create(16, true);
+ return intType(16, true);
case INT_32:
- return IntLogicalTypeAnnotation.create(32, true);
+ return intType(32, true);
case INT_64:
- return IntLogicalTypeAnnotation.create(64, true);
+ return intType(64, true);
case ENUM:
- return EnumLogicalTypeAnnotation.create();
+ return enumType();
case JSON:
- return JsonLogicalTypeAnnotation.create();
+ return jsonType();
case BSON:
- return BsonLogicalTypeAnnotation.create();
+ return bsonType();
case MAP_KEY_VALUE:
- return MapKeyValueTypeAnnotation.create();
+ return mapKeyValueType();
default:
throw new RuntimeException("Can't convert original type to logical
type, unknown original type " + originalType);
}
}
+
+ static StringLogicalTypeAnnotation stringType() {
+ return StringLogicalTypeAnnotation.INSTANCE;
+ }
+
+ static MapLogicalTypeAnnotation mapType() {
+ return MapLogicalTypeAnnotation.INSTANCE;
+ }
+
+ static ListLogicalTypeAnnotation listType() {
+ return ListLogicalTypeAnnotation.INSTANCE;
+ }
+
+ static EnumLogicalTypeAnnotation enumType() {
+ return EnumLogicalTypeAnnotation.INSTANCE;
+ }
+
+ static DecimalLogicalTypeAnnotation decimalType(final int scale, final int
precision) {
+ return new DecimalLogicalTypeAnnotation(scale, precision);
+ }
+
+ static DateLogicalTypeAnnotation dateType() {
+ return DateLogicalTypeAnnotation.INSTANCE;
+ }
+
+ static TimeLogicalTypeAnnotation timeType(final boolean isAdjustedToUTC,
final TimeUnit unit) {
+ return new TimeLogicalTypeAnnotation(isAdjustedToUTC, unit);
+ }
+
+ static TimestampLogicalTypeAnnotation timestampType(final boolean
isAdjustedToUTC, final TimeUnit unit) {
+ return new TimestampLogicalTypeAnnotation(isAdjustedToUTC, unit);
+ }
+
+ static IntLogicalTypeAnnotation intType(final int bitWidth, final boolean
isSigned) {
+ Preconditions.checkArgument(
+ bitWidth == 8 || bitWidth == 16 || bitWidth == 32 || bitWidth == 64,
+ "Invalid bit width for integer logical type, " + bitWidth + " is not
allowed, " +
+ "valid bit width values: 8, 16, 32, 64");
+ return new IntLogicalTypeAnnotation(bitWidth, isSigned);
+ }
+
+ static JsonLogicalTypeAnnotation jsonType() {
+ return JsonLogicalTypeAnnotation.INSTANCE;
+ }
+
+ static BsonLogicalTypeAnnotation bsonType() {
+ return BsonLogicalTypeAnnotation.INSTANCE;
+ }
+
+ static IntervalLogicalTypeAnnotation intervalType() {
Review comment:
Interval is not supported in LogicalType currently, so I would not expose it
yet. It is always possible to make a restricted access public but in the other
way it would break backward compatibility.
Abstract class sounds reasonable to me.
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> Support for new logical type representation
> -------------------------------------------
>
> Key: PARQUET-1253
> URL: https://issues.apache.org/jira/browse/PARQUET-1253
> Project: Parquet
> Issue Type: Improvement
> Components: parquet-mr
> Reporter: Nandor Kollar
> Assignee: Nandor Kollar
> Priority: Major
>
> Latest parquet-format
> [introduced|https://github.com/apache/parquet-format/commit/863875e0be3237c6aa4ed71733d54c91a51deabe#diff-0f9d1b5347959e15259da7ba8f4b6252]
> a new representation for logical types. As of now this is not yet supported
> in parquet-mr, thus there's no way to use parametrized UTC normalized
> timestamp data types. When reading and writing Parquet files, besides
> 'converted_type' parquet-mr should use the new 'logicalType' field in
> SchemaElement to tell the current logical type annotation. To maintain
> backward compatibility, the semantic of converted_type shouldn't change.
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