stevenzwu commented on code in PR #9606:
URL: https://github.com/apache/iceberg/pull/9606#discussion_r1507990720
##########
flink/v1.18/flink/src/main/java/org/apache/iceberg/flink/FlinkSchemaUtil.java:
##########
@@ -68,6 +72,33 @@ public static Schema convert(TableSchema schema) {
return freshIdentifierFieldIds(iSchema, schema);
}
+ /** Convert the flink table schema to apache iceberg schema with column
comment. */
+ public static Schema convert(ResolvedCatalogTable catalogTable) {
+ List<Column> tableColumns = catalogTable.getResolvedSchema().getColumns();
+ // copy from org.apache.flink.table.api.Schema#toRowDataType
+ DataTypes.Field[] fields =
+ tableColumns.stream()
+ .map(
+ column -> {
+ if (column.getComment().isPresent()) {
+ return DataTypes.FIELD(
+ column.getName(), column.getDataType(),
column.getComment().get());
+ } else {
+ return DataTypes.FIELD(column.getName(),
column.getDataType());
+ }
+ })
+ .toArray(DataTypes.Field[]::new);
+
+ LogicalType schemaType = DataTypes.ROW(fields).notNull().getLogicalType();
+ Preconditions.checkArgument(
+ schemaType instanceof RowType, "Schema logical type should be
RowType.");
+
+ RowType root = (RowType) schemaType;
+ Type converted = root.accept(new FlinkTypeToType(root));
+ Schema iSchema = new Schema(converted.asStructType().fields());
Review Comment:
nit: use `icebergSchema` more readability than saving a few chars
##########
flink/v1.18/flink/src/main/java/org/apache/iceberg/flink/FlinkSchemaUtil.java:
##########
@@ -68,6 +72,33 @@ public static Schema convert(TableSchema schema) {
return freshIdentifierFieldIds(iSchema, schema);
}
+ /** Convert the flink table schema to apache iceberg schema with column
comment. */
+ public static Schema convert(ResolvedCatalogTable catalogTable) {
+ List<Column> tableColumns = catalogTable.getResolvedSchema().getColumns();
+ // copy from org.apache.flink.table.api.Schema#toRowDataType
Review Comment:
can we use `ResolvedSchema#toSourceRowDataType()` ?
##########
flink/v1.18/flink/src/main/java/org/apache/iceberg/flink/FlinkSchemaUtil.java:
##########
@@ -68,6 +72,33 @@ public static Schema convert(TableSchema schema) {
return freshIdentifierFieldIds(iSchema, schema);
}
+ /** Convert the flink table schema to apache iceberg schema with column
comment. */
+ public static Schema convert(ResolvedCatalogTable catalogTable) {
Review Comment:
this API is weird in the sense that it converts a flink table to an Iceberg
schema. it probably should be
```
public static Schema convert(ResolvedSchema flinkSchema)
```
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