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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2011-10-16 15:39:24 -0400 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2011-10-16 15:39:24 -0400 |
| commit | 9e8da0f75731aaa7605cf4656c21ea09e84d2eb1 (patch) | |
| tree | 1776d3f5e68d5ab997851fcfcc3cc684a64e2058 /src/include/access/nbtree.h | |
| parent | 0898d71f66ed884af726556ac9ffc8081dddc757 (diff) | |
| download | postgresql-9e8da0f75731aaa7605cf4656c21ea09e84d2eb1.tar.gz | |
Teach btree to handle ScalarArrayOpExpr quals natively.
This allows "indexedcol op ANY(ARRAY[...])" conditions to be used in plain
indexscans, and particularly in index-only scans.
Diffstat (limited to 'src/include/access/nbtree.h')
| -rw-r--r-- | src/include/access/nbtree.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/include/access/nbtree.h b/src/include/access/nbtree.h index 199fc94026..347d9423ba 100644 --- a/src/include/access/nbtree.h +++ b/src/include/access/nbtree.h @@ -525,6 +525,15 @@ typedef BTScanPosData *BTScanPos; #define BTScanPosIsValid(scanpos) BufferIsValid((scanpos).buf) +/* We need one of these for each equality-type SK_SEARCHARRAY scan key */ +typedef struct BTArrayKeyInfo +{ + int scan_key; /* index of associated key in arrayKeyData */ + int cur_elem; /* index of current element in elem_values */ + int num_elems; /* number of elems in current array value */ + Datum *elem_values; /* array of num_elems Datums */ +} BTArrayKeyInfo; + typedef struct BTScanOpaqueData { /* these fields are set by _bt_preprocess_keys(): */ @@ -532,6 +541,13 @@ typedef struct BTScanOpaqueData int numberOfKeys; /* number of preprocessed scan keys */ ScanKey keyData; /* array of preprocessed scan keys */ + /* workspace for SK_SEARCHARRAY support */ + ScanKey arrayKeyData; /* modified copy of scan->keyData */ + int numArrayKeys; /* number of equality-type array keys (-1 if + * there are any unsatisfiable array keys) */ + BTArrayKeyInfo *arrayKeys; /* info about each equality-type array key */ + MemoryContext arrayContext; /* scan-lifespan context for array data */ + /* info about killed items if any (killedItems is NULL if never used) */ int *killedItems; /* currPos.items indexes of killed items */ int numKilled; /* number of currently stored items */ @@ -639,6 +655,9 @@ extern ScanKey _bt_mkscankey(Relation rel, IndexTuple itup); extern ScanKey _bt_mkscankey_nodata(Relation rel); extern void _bt_freeskey(ScanKey skey); extern void _bt_freestack(BTStack stack); +extern void _bt_preprocess_array_keys(IndexScanDesc scan); +extern void _bt_start_array_keys(IndexScanDesc scan, ScanDirection dir); +extern bool _bt_advance_array_keys(IndexScanDesc scan, ScanDirection dir); extern void _bt_preprocess_keys(IndexScanDesc scan); extern IndexTuple _bt_checkkeys(IndexScanDesc scan, Page page, OffsetNumber offnum, |