Commit 1a9fae81 authored by unknown's avatar unknown
Browse files

Better comments in KEY_PART_INFO struct

parent 6297d1ab

sql/structs.h

+7 −1
Original line number Diff line number Diff line
@@ -70,7 +70,13 @@ typedef struct st_key_part_info { /* Info about a key part */ 
  Field *field;

  uint	offset;				/* offset in record (from 0) */

  uint	null_offset;			/* Offset to null_bit in record */

  uint16 length;			/* Length of key_part */

  uint16 length;                        /* Length of keypart value in bytes */

  /* 

    Number of bytes required to store the keypart value. This may be

    different from the "length" field as it also counts

     - possible NULL-flag byte (see HA_KEY_NULL_LENGTH)

     - possible HA_KEY_BLOB_LENGTH bytes needed to store actual value length.

  */

  uint16 store_length;

  uint16 key_type;

  uint16 fieldnr;			/* Fieldnum in UNIREG */