InnoDB: Fix bug #13315, index columns having a maximum length of 767.

innobase/data/data0data.c:
  Adapt to DICT_MAX_COL_PREFIX_LEN rename.
innobase/dict/dict0dict.c:
  Adapt to DICT_MAX_COL_PREFIX_LEN rename.
innobase/include/dict0mem.h:
  Rename DICT_MAX_COL_PREFIX_LEN to DICT_MAX_INDEX_COL_LEN.
innobase/include/row0mysql.h:
  Add field_lengths parameter to row_create_index_for_mysql.
innobase/rem/rem0rec.c:
  Adapt to DICT_MAX_COL_PREFIX_LEN rename.
innobase/row/row0mysql.c:
  Add field_lengths parameter to row_create_index_for_mysql and use it to
  check for too long index columns.
mysql-test/r/innodb.result:
  New tests.
mysql-test/t/innodb.test:
  New tests.
sql/ha_innodb.cc:
  Create temporary field_lengths buffer and pass it to
  row_create_index_for_mysql.

innobase/data/data0data.c

@@ -561,12 +561,12 @@ dtuple_convert_big_rec(
 		}
 	
 		/* We do not store externally fields which are smaller than
-		DICT_MAX_COL_PREFIX_LEN */
+		DICT_MAX_INDEX_COL_LEN */
 
-		ut_a(DICT_MAX_COL_PREFIX_LEN > REC_1BYTE_OFFS_LIMIT);
+		ut_a(DICT_MAX_INDEX_COL_LEN > REC_1BYTE_OFFS_LIMIT);
 
 		if (longest < BTR_EXTERN_FIELD_REF_SIZE + 10
-						+ DICT_MAX_COL_PREFIX_LEN) {
+						+ DICT_MAX_INDEX_COL_LEN) {
 			/* Cannot shorten more */
 
 			mem_heap_free(heap);
@@ -588,10 +588,10 @@ dtuple_convert_big_rec(
 		dfield = dtuple_get_nth_field(entry, longest_i);
 		vector->fields[n_fields].field_no = longest_i;
 
-		ut_a(dfield->len > DICT_MAX_COL_PREFIX_LEN);
+		ut_a(dfield->len > DICT_MAX_INDEX_COL_LEN);
 		
 		vector->fields[n_fields].len = dfield->len
-						- DICT_MAX_COL_PREFIX_LEN;
+						- DICT_MAX_INDEX_COL_LEN;
 
 		vector->fields[n_fields].data = mem_heap_alloc(heap,
 						vector->fields[n_fields].len);

innobase/dict/dict0dict.c

@@ -1625,7 +1625,7 @@ dict_index_add_col(
 	variable-length fields, so that the extern flag can be embedded in
 	the length word. */
 
-	if (field->fixed_len > DICT_MAX_COL_PREFIX_LEN) {
+	if (field->fixed_len > DICT_MAX_INDEX_COL_LEN) {
 		field->fixed_len = 0;
 	}
 

innobase/include/dict0mem.h

@@ -152,12 +152,12 @@ struct dict_col_struct{
 				in some of the functions below */
 };
 
-/* DICT_MAX_COL_PREFIX_LEN is measured in bytes. Starting from 4.1.6, we
-set max col prefix len to < 3 * 256, so that one can create a column prefix
-index on 255 characters of a TEXT field also in the UTF-8 charset. In that
-charset, a character may take at most 3 bytes. */
+/* DICT_MAX_INDEX_COL_LEN is measured in bytes and is the max index column
+length + 1. Starting from 4.1.6, we set it to < 3 * 256, so that one can
+create a column prefix index on 255 characters of a TEXT field also in the
+UTF-8 charset. In that charset, a character may take at most 3 bytes. */
 
-#define DICT_MAX_COL_PREFIX_LEN	768
+#define DICT_MAX_INDEX_COL_LEN		768
 
 /* Data structure for a field in an index */
 struct dict_field_struct{
@@ -169,12 +169,12 @@ struct dict_field_struct{
 					prefix in bytes in a MySQL index of
 					type, e.g., INDEX (textcol(25));
 					must be smaller than
-					DICT_MAX_COL_PREFIX_LEN; NOTE that
+					DICT_MAX_INDEX_COL_LEN; NOTE that
 					in the UTF-8 charset, MySQL sets this
 					to 3 * the prefix len in UTF-8 chars */
 	ulint		fixed_len;	/* 0 or the fixed length of the
 					column if smaller than
-					DICT_MAX_COL_PREFIX_LEN */
+					DICT_MAX_INDEX_COL_LEN */
 	ulint		fixed_offs;	/* offset to the field, or
 					ULINT_UNDEFINED if it is not fixed
 					within the record (due to preceding

innobase/include/row0mysql.h

@@ -335,8 +335,14 @@ int
 row_create_index_for_mysql(
 /*=======================*/
 					/* out: error number or DB_SUCCESS */
-	dict_index_t*	index,		/* in: index defintion */
-	trx_t*		trx);		/* in: transaction handle */
+	dict_index_t*	index,		/* in: index definition */
+	trx_t*		trx,		/* in: transaction handle */
+	const ulint*	field_lengths); /* in: if not NULL, must contain
+					dict_index_get_n_fields(index)
+					actual field lengths for the
+					index columns, which are
+					then checked for not being too
+					large. */
 /*************************************************************************
 Scans a table create SQL string and adds to the data dictionary
 the foreign key constraints declared in the string. This function

innobase/rem/rem0rec.c

@@ -621,7 +621,7 @@ rec_set_nth_field_extern_bit_new(
 		if (field->fixed_len) {
 			/* fixed-length fields cannot be external
 			(Fixed-length fields longer than
-			DICT_MAX_COL_PREFIX_LEN will be treated as
+			DICT_MAX_INDEX_COL_LEN will be treated as
 			variable-length ones in dict_index_add_col().) */
 			ut_ad(i != ith);
 			continue;

innobase/row/row0mysql.c

@@ -1973,13 +1973,20 @@ row_create_index_for_mysql(
 /*=======================*/
 					/* out: error number or DB_SUCCESS */
 	dict_index_t*	index,		/* in: index definition */
-	trx_t*		trx)		/* in: transaction handle */
+	trx_t*		trx,		/* in: transaction handle */
+	const ulint*	field_lengths)	/* in: if not NULL, must contain
+					dict_index_get_n_fields(index)
+					actual field lengths for the
+					index columns, which are
+					then checked for not being too
+					large. */
 {
 	ind_node_t*	node;
 	mem_heap_t*	heap;
 	que_thr_t*	thr;
 	ulint		err;
 	ulint		i, j;
+	ulint		len;
 	
 #ifdef UNIV_SYNC_DEBUG
 	ut_ad(rw_lock_own(&dict_operation_lock, RW_LOCK_EX));
@@ -2018,10 +2025,16 @@ row_create_index_for_mysql(
 			}
 		}
 		
-		/* Check also that prefix_len < DICT_MAX_COL_PREFIX_LEN */
+		/* Check also that prefix_len and actual length
+		< DICT_MAX_INDEX_COL_LEN */
+
+		len = dict_index_get_nth_field(index, i)->prefix_len;
+
+		if (field_lengths) {
+			len = ut_max(len, field_lengths[i]);
+		}
 		
-		if (dict_index_get_nth_field(index, i)->prefix_len
-						>= DICT_MAX_COL_PREFIX_LEN) {
+		if (len >= DICT_MAX_INDEX_COL_LEN) {
 			err = DB_TOO_BIG_RECORD;
 
 			goto error_handling;

mysql-test/r/innodb.result

@@ -2559,3 +2559,37 @@ FOREIGN KEY (b) REFERENCES test.t1(id)
 ) ENGINE=InnoDB;
 Got one of the listed errors
 DROP TABLE t1;
+create table t1 (col1 varchar(2000), index (col1(767)))
+character set = latin1 engine = innodb;
+create table t2 (col1 char(255), index (col1))
+character set = latin1 engine = innodb;
+create table t3 (col1 binary(255), index (col1))
+character set = latin1 engine = innodb;
+create table t4 (col1 varchar(767), index (col1))
+character set = latin1 engine = innodb;
+create table t5 (col1 varchar(767) primary key)
+character set = latin1 engine = innodb;
+create table t6 (col1 varbinary(767) primary key)
+character set = latin1 engine = innodb;
+create table t7 (col1 text, index(col1(767)))
+character set = latin1 engine = innodb;
+create table t8 (col1 blob, index(col1(767)))
+character set = latin1 engine = innodb;
+create table t9 (col1 varchar(512), col2 varchar(512), index(col1, col2))
+character set = latin1 engine = innodb;
+drop table t1, t2, t3, t4, t5, t6, t7, t8, t9;
+create table t1 (col1 varchar(768), index (col1))
+character set = latin1 engine = innodb;
+ERROR HY000: Can't create table './test/t1.frm' (errno: 139)
+create table t2 (col1 varchar(768) primary key)
+character set = latin1 engine = innodb;
+ERROR HY000: Can't create table './test/t2.frm' (errno: 139)
+create table t3 (col1 varbinary(768) primary key)
+character set = latin1 engine = innodb;
+ERROR HY000: Can't create table './test/t3.frm' (errno: 139)
+create table t4 (col1 text, index(col1(768)))
+character set = latin1 engine = innodb;
+ERROR HY000: Can't create table './test/t4.frm' (errno: 139)
+create table t5 (col1 blob, index(col1(768)))
+character set = latin1 engine = innodb;
+ERROR HY000: Can't create table './test/t5.frm' (errno: 139)

mysql-test/t/innodb.test

@@ -1482,3 +1482,49 @@ CREATE TEMPORARY TABLE t2
  FOREIGN KEY (b) REFERENCES test.t1(id)
 ) ENGINE=InnoDB;
 DROP TABLE t1;
+
+#
+# Test that index column max sizes are checked (bug #13315)
+#
+
+# prefix index
+create table t1 (col1 varchar(2000), index (col1(767)))
+ character set = latin1 engine = innodb;
+
+# normal indexes
+create table t2 (col1 char(255), index (col1))
+ character set = latin1 engine = innodb;
+create table t3 (col1 binary(255), index (col1))
+ character set = latin1 engine = innodb;
+create table t4 (col1 varchar(767), index (col1))
+ character set = latin1 engine = innodb;
+create table t5 (col1 varchar(767) primary key)
+ character set = latin1 engine = innodb;
+create table t6 (col1 varbinary(767) primary key)
+ character set = latin1 engine = innodb;
+create table t7 (col1 text, index(col1(767)))
+ character set = latin1 engine = innodb;
+create table t8 (col1 blob, index(col1(767)))
+ character set = latin1 engine = innodb;
+
+# multi-column indexes are allowed to be longer
+create table t9 (col1 varchar(512), col2 varchar(512), index(col1, col2))
+ character set = latin1 engine = innodb;
+
+drop table t1, t2, t3, t4, t5, t6, t7, t8, t9;
+
+--error 1005
+create table t1 (col1 varchar(768), index (col1))
+ character set = latin1 engine = innodb;
+--error 1005
+create table t2 (col1 varchar(768) primary key)
+ character set = latin1 engine = innodb;
+--error 1005
+create table t3 (col1 varbinary(768) primary key)
+ character set = latin1 engine = innodb;
+--error 1005
+create table t4 (col1 text, index(col1(768)))
+ character set = latin1 engine = innodb;
+--error 1005
+create table t5 (col1 blob, index(col1(768)))
+ character set = latin1 engine = innodb;

sql/ha_innodb.cc

@@ -4492,6 +4492,7 @@ create_index(
 	ulint		is_unsigned;
   	ulint		i;
   	ulint		j;
+	ulint*		field_lengths;
 	
   	DBUG_ENTER("create_index");
 
@@ -4514,6 +4515,10 @@ create_index(
 
 	index = dict_mem_index_create((char*) table_name, key->name, 0,
 						ind_type, n_fields);
+
+	field_lengths = (ulint*) my_malloc(sizeof(ulint) * n_fields,
+		MYF(MY_FAE));
+	
 	for (i = 0; i < n_fields; i++) {
 		key_part = key->key_part + i;
 
@@ -4568,6 +4573,8 @@ create_index(
 		        prefix_len = 0;
 		}
 
+		field_lengths[i] = key_part->length;
+
 		/* We assume all fields should be sorted in ascending
 		order, hence the '0': */
 
@@ -4576,10 +4583,12 @@ create_index(
 				0, prefix_len);
 	}
 
-	error = row_create_index_for_mysql(index, trx);
+	error = row_create_index_for_mysql(index, trx, field_lengths);
 
 	error = convert_error_code_to_mysql(error, NULL);
 
+	my_free((gptr) field_lengths, MYF(0));
+	
 	DBUG_RETURN(error);
 }
 
@@ -4602,7 +4611,7 @@ create_clustered_index_when_no_primary(
 	index = dict_mem_index_create((char*) table_name,
 				      (char*) "GEN_CLUST_INDEX",
 				      0, DICT_CLUSTERED, 0);
-	error = row_create_index_for_mysql(index, trx);
+	error = row_create_index_for_mysql(index, trx, NULL);
 
 	error = convert_error_code_to_mysql(error, NULL);