MCOL-2000 Process charset definitions in the ALTER TABLE .. ADD COLUMN
MCOL-2000 Yet another fixes for column charsets
* make respect for column (including table/db/server default) charsets
for the TEXT(n) fields
* round TEXT(n) column length up to the next default length of TEXT-like
subtypes, 255 (TINYTEXT), 65535 (TEXT) and so on up to 2100000000
(LONGTEXT)
* TEXT and BLOB now have separate identifiers internally
* TEXT columns are identified as such in system catalog
* cpimport only requires hex input for BLOB, not TEXT
This patch allows the following syntax to change the current
autoincrement value for the table:
ALTER TABLE table_name COMMENT='autoincrement=value';
Where "value" is the new integer to be used.