danny0405 commented on a change in pull request #10096:
[FLINK-14623][table-api] Add computed column information into TableSc…
URL: https://github.com/apache/flink/pull/10096#discussion_r343011180
##########
File path:
flink-table/flink-table-common/src/main/java/org/apache/flink/table/api/TableSchema.java
##########
@@ -209,18 +173,48 @@ public int getFieldCount() {
* @param fieldIndex the index of the field
*/
public Optional<String> getFieldName(int fieldIndex) {
- if (fieldIndex < 0 || fieldIndex >= fieldNames.length) {
+ if (fieldIndex < 0 || fieldIndex >= columns.size()) {
+ return Optional.empty();
+ }
+ return Optional.of(this.columns.get(fieldIndex).getName());
+ }
+
+ /**
+ * Returns the {@link TableColumn} instance for the given field index.
+ *
+ * @param fieldIndex the index of the field
+ */
+ public Optional<TableColumn> getTableColumn(int fieldIndex) {
+ if (fieldIndex < 0 || fieldIndex >= columns.size()) {
return Optional.empty();
}
- return Optional.of(fieldNames[fieldIndex]);
+ return Optional.of(this.columns.get(fieldIndex));
+ }
+
+ /**
+ * Returns the {@link TableColumn} instance for the given field name.
+ *
+ * @param fieldName the name of the field
+ */
+ public Optional<TableColumn> getTableColumn(String fieldName) {
+ return this.columns.stream()
+ .filter(column -> column.getName().equals(fieldName))
+ .findFirst();
+ }
+
+ /**
+ * Returns all the {@link TableColumn}s for this table schema.
+ */
+ public TableColumn[] getTableColumns() {
+ return this.columns.toArray(new TableColumn[0]);
}
/**
* Converts a table schema into a (nested) data type describing a
{@link DataTypes#ROW(Field...)}.
Review comment:
Sure, thanks.
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