Hi Sri,
I think altering data type of a column is supported only if it is a COLUMN store table.
I tried the following
schema sreehariv;
table "TIME_TEST";
column table "TIME_TEST_COL" ("CRTIME" DATE);
table "TIME_TEST_ROW" ("CRTIME" DATE);
INSERT into "TIME_TEST_COL" values(CURRENT_DATE);
INSERT into "TIME_TEST_ROW" values(CURRENT_DATE);
ALTER TABLE "TIME_TEST_ROW" ALTER ("CRTIME" TIMESTAMP);
ALTER TABLE "TIME_TEST_COL" ALTER ("CRTIME" TIMESTAMP);Where, the row store table could not be altered .
Sreehari