xuzifu666 commented on code in PR #4453:
URL: https://github.com/apache/calcite/pull/4453#discussion_r2181686747
##########
core/src/main/java/org/apache/calcite/util/RelToSqlConverterUtil.java:
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@@ -328,4 +337,95 @@ public static void unparseBoolLiteralToCondition(SqlWriter
writer, boolean value
writer.literal(value ? "1" : "0");
writer.endList(frame);
}
+
+ /**
+ * Transformation Map type from MAP<VARCHAR,VARCHAR> to
Map(VARCHAR,VARCHAR).
+ */
+ public static SqlDataTypeSpec getCastSpecClickHouseSqlMapType(SqlDialect
dialect,
+ RelDataType type, SqlParserPos pos) {
+ MapSqlType mapSqlType = (MapSqlType) type;
+ SqlDataTypeSpec keySpec = (SqlDataTypeSpec)
dialect.getCastSpec(mapSqlType.getKeyType());
+ SqlDataTypeSpec valueSpec =
+ (SqlDataTypeSpec) dialect.getCastSpec(mapSqlType.getValueType());
+ SqlDataTypeSpec nonNullKeySpec =
+ requireNonNull(keySpec, "keySpec");
+ SqlDataTypeSpec nonNullValueSpec =
+ requireNonNull(valueSpec, "valueSpec");
+ SqlMapTypeNameSpec sqlMapTypeNameSpec =
+ new ClickHouseSqlMapTypeNameSpec(nonNullKeySpec, nonNullValueSpec,
pos);
+ return new SqlDataTypeSpec(sqlMapTypeNameSpec,
+ SqlParserPos.ZERO);
+ }
+
+ /**
+ * Transformation Map type from VARCHAR ARRAY to Array(VARCHAR).
Review Comment:
done.
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