diff options
Diffstat (limited to 'src/include/access/nbtree.h')
| -rw-r--r-- | src/include/access/nbtree.h | 50 |
1 files changed, 25 insertions, 25 deletions
diff --git a/src/include/access/nbtree.h b/src/include/access/nbtree.h index 1a8b16d45e2..f2817590c41 100644 --- a/src/include/access/nbtree.h +++ b/src/include/access/nbtree.h @@ -36,9 +36,9 @@ typedef uint16 BTCycleId; * and status. If the page is deleted, we replace the level with the * next-transaction-ID value indicating when it is safe to reclaim the page. * - * We also store a "vacuum cycle ID". When a page is split while VACUUM is + * We also store a "vacuum cycle ID". When a page is split while VACUUM is * processing the index, a nonzero value associated with the VACUUM run is - * stored into both halves of the split page. (If VACUUM is not running, + * stored into both halves of the split page. (If VACUUM is not running, * both pages receive zero cycleids.) This allows VACUUM to detect whether * a page was split since it started, with a small probability of false match * if the page was last split some exact multiple of MAX_BT_CYCLE_ID VACUUMs @@ -73,10 +73,10 @@ typedef BTPageOpaqueData *BTPageOpaque; #define BTP_HALF_DEAD (1 << 4) /* empty, but still in tree */ #define BTP_SPLIT_END (1 << 5) /* rightmost page of split group */ #define BTP_HAS_GARBAGE (1 << 6) /* page has LP_DEAD tuples */ -#define BTP_INCOMPLETE_SPLIT (1 << 7) /* right sibling's downlink is missing */ +#define BTP_INCOMPLETE_SPLIT (1 << 7) /* right sibling's downlink is missing */ /* - * The max allowed value of a cycle ID is a bit less than 64K. This is + * The max allowed value of a cycle ID is a bit less than 64K. This is * for convenience of pg_filedump and similar utilities: we want to use * the last 2 bytes of special space as an index type indicator, and * restricting cycle ID lets btree use that space for vacuum cycle IDs @@ -218,9 +218,9 @@ typedef struct BTMetaPageData #define XLOG_BTREE_SPLIT_R_ROOT 0x60 /* as above, new item on right */ #define XLOG_BTREE_DELETE 0x70 /* delete leaf index tuples for a page */ #define XLOG_BTREE_UNLINK_PAGE 0x80 /* delete a half-dead page */ -#define XLOG_BTREE_UNLINK_PAGE_META 0x90 /* same, and update metapage */ +#define XLOG_BTREE_UNLINK_PAGE_META 0x90 /* same, and update metapage */ #define XLOG_BTREE_NEWROOT 0xA0 /* new root page */ -#define XLOG_BTREE_MARK_PAGE_HALFDEAD 0xB0 /* mark a leaf as half-dead */ +#define XLOG_BTREE_MARK_PAGE_HALFDEAD 0xB0 /* mark a leaf as half-dead */ #define XLOG_BTREE_VACUUM 0xC0 /* delete entries on a page during * vacuum */ #define XLOG_BTREE_REUSE_PAGE 0xD0 /* old page is about to be reused from @@ -273,9 +273,9 @@ typedef struct xl_btree_insert * Note: the four XLOG_BTREE_SPLIT xl_info codes all use this data record. * The _L and _R variants indicate whether the inserted tuple went into the * left or right split page (and thus, whether newitemoff and the new item - * are stored or not). The _ROOT variants indicate that we are splitting + * are stored or not). The _ROOT variants indicate that we are splitting * the root page, and thus that a newroot record rather than an insert or - * split record should follow. Note that a split record never carries a + * split record should follow. Note that a split record never carries a * metapage update --- we'll do that in the parent-level update. */ typedef struct xl_btree_split @@ -295,11 +295,11 @@ typedef struct xl_btree_split * * If level > 0, an IndexTuple representing the HIKEY of the left page * follows. We don't need this on leaf pages, because it's the same as - * the leftmost key in the new right page. Also, it's suppressed if + * the leftmost key in the new right page. Also, it's suppressed if * XLogInsert chooses to store the left page's whole page image. * - * If level > 0, BlockNumber of the page whose incomplete-split flag - * this insertion clears. (not aligned) + * If level > 0, BlockNumber of the page whose incomplete-split flag this + * insertion clears. (not aligned) * * Last are the right page's tuples in the form used by _bt_restore_page. */ @@ -387,7 +387,7 @@ typedef struct xl_btree_mark_page_halfdead BlockNumber topparent; /* topmost internal page in the branch */ } xl_btree_mark_page_halfdead; -#define SizeOfBtreeMarkPageHalfDead (offsetof(xl_btree_mark_page_halfdead, topparent) + sizeof(BlockNumber)) +#define SizeOfBtreeMarkPageHalfDead (offsetof(xl_btree_mark_page_halfdead, topparent) + sizeof(BlockNumber)) /* * This is what we need to know about deletion of a btree page. Note we do @@ -396,19 +396,19 @@ typedef struct xl_btree_mark_page_halfdead */ typedef struct xl_btree_unlink_page { - RelFileNode node; + RelFileNode node; BlockNumber deadblk; /* target block being deleted */ BlockNumber leftsib; /* target block's left sibling, if any */ BlockNumber rightsib; /* target block's right sibling */ /* - * Information needed to recreate the leaf page, when target is an internal - * page. + * Information needed to recreate the leaf page, when target is an + * internal page. */ - BlockNumber leafblk; - BlockNumber leafleftsib; - BlockNumber leafrightsib; - BlockNumber topparent; /* next child down in the branch */ + BlockNumber leafblk; + BlockNumber leafleftsib; + BlockNumber leafrightsib; + BlockNumber topparent; /* next child down in the branch */ TransactionId btpo_xact; /* value of btpo.xact for use in recovery */ /* xl_btree_metadata FOLLOWS IF XLOG_BTREE_UNLINK_PAGE_META */ @@ -446,12 +446,12 @@ typedef struct xl_btree_newroot /* * When a new operator class is declared, we require that the user * supply us with an amproc procedure (BTORDER_PROC) for determining - * whether, for two keys a and b, a < b, a = b, or a > b. This routine + * whether, for two keys a and b, a < b, a = b, or a > b. This routine * must return < 0, 0, > 0, respectively, in these three cases. (It must * not return INT_MIN, since we may negate the result before using it.) * * To facilitate accelerated sorting, an operator class may choose to - * offer a second procedure (BTSORTSUPPORT_PROC). For full details, see + * offer a second procedure (BTSORTSUPPORT_PROC). For full details, see * src/include/utils/sortsupport.h. */ @@ -490,7 +490,7 @@ typedef BTStackData *BTStack; * BTScanOpaqueData is the btree-private state needed for an indexscan. * This consists of preprocessed scan keys (see _bt_preprocess_keys() for * details of the preprocessing), information about the current location - * of the scan, and information about the marked location, if any. (We use + * of the scan, and information about the marked location, if any. (We use * BTScanPosData to represent the data needed for each of current and marked * locations.) In addition we can remember some known-killed index entries * that must be marked before we can move off the current page. @@ -498,9 +498,9 @@ typedef BTStackData *BTStack; * Index scans work a page at a time: we pin and read-lock the page, identify * all the matching items on the page and save them in BTScanPosData, then * release the read-lock while returning the items to the caller for - * processing. This approach minimizes lock/unlock traffic. Note that we + * processing. This approach minimizes lock/unlock traffic. Note that we * keep the pin on the index page until the caller is done with all the items - * (this is needed for VACUUM synchronization, see nbtree/README). When we + * (this is needed for VACUUM synchronization, see nbtree/README). When we * are ready to step to the next page, if the caller has told us any of the * items were killed, we re-lock the page to mark them killed, then unlock. * Finally we drop the pin and step to the next page in the appropriate @@ -612,7 +612,7 @@ typedef BTScanOpaqueData *BTScanOpaque; /* * We use some private sk_flags bits in preprocessed scan keys. We're allowed - * to use bits 16-31 (see skey.h). The uppermost bits are copied from the + * to use bits 16-31 (see skey.h). The uppermost bits are copied from the * index's indoption[] array entry for the index attribute. */ #define SK_BT_REQFWD 0x00010000 /* required to continue forward scan */ |