Fix the issue the column name is not right (babelfish-for-postgresql#…

…2844)

Column name is wrong when the column is followed with a direct '--'
comment, this commit fix the issue by correctly set the column_start
pointer during the identifier search.

Task: BABEL-5139
Signed-off-by: Zhibai Song <[email protected]>

contrib/babelfishpg_tsql/src/hooks.c

@@ -2009,7 +2009,11 @@ pre_transform_target_entry(ResTarget *res, ParseState *pstate,
 					 * for the last_dot position
 					 */
 					if (*colname_start == '-' && *(colname_start+1) == '-')
+					{
+						last_dot++;
+						colname_start = last_dot;
 						break;
+					}
 					if(open_square_bracket == 0 && *colname_start == '"')
 					{
 						double_quotes++;