davidradl commented on code in PR #27222:
URL: https://github.com/apache/flink/pull/27222#discussion_r2513568045
##########
flink-table/flink-sql-parser/src/main/java/org/apache/flink/sql/parser/ddl/SqlCreateMaterializedTable.java:
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@@ -150,20 +170,33 @@ public SqlNode getAsQuery() {
return asQuery;
}
+ /** Returns the column constraints plus the table constraints. */
+ public List<SqlTableConstraint> getFullConstraints() {
+ return SqlConstraintValidator.getFullConstraints(tableConstraints,
columnList);
+ }
+
+ @Override
+ public void validate() throws SqlValidateException {
+ if (!isSchemaWithColumnsIdentifiersOnly()) {
+
SqlConstraintValidator.validateAndChangeColumnNullability(tableConstraints,
columnList);
+ }
+ }
+
+ public boolean isSchemaWithColumnsIdentifiersOnly() {
+ // CREATE MATERIALIZED TABLE supports passing only column identifiers
in the column list. If
+ // the first column in the list is an identifier, then we assume the
rest of the
+ // columns are identifiers as well.
+ return !getColumnList().isEmpty() && getColumnList().get(0) instanceof
SqlIdentifier;
+ }
+
@Override
public void unparse(SqlWriter writer, int leftPrec, int rightPrec) {
writer.keyword("CREATE MATERIALIZED TABLE");
tableName.unparse(writer, leftPrec, rightPrec);
- if (tableConstraint != null) {
- writer.newlineAndIndent();
+ if (!columnList.isEmpty() || !tableConstraints.isEmpty() || watermark
!= null) {
Review Comment:
I am curious - can we have a watermark when there are no columns?
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