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Overview
Comment: | Preliminary documentation for the enhancements to index_info and index_xinfo to support viewing the on-disk representation of WITHOUT ROWID tables. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA3-256: |
296e23a4b8d6decb27b1f9fb29c0d205 |
User & Date: | drh 2019-07-17 13:02:07.572 |
Context
2019-07-26
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20:22 | Update the checklist.tcl script to align with the latest code on the website. (check-in: ef7dae4ce8 user: drh tags: trunk) | |
2019-07-17
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13:02 | Preliminary documentation for the enhancements to index_info and index_xinfo to support viewing the on-disk representation of WITHOUT ROWID tables. (check-in: 296e23a4b8 user: drh tags: trunk) | |
2019-07-15
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19:25 | Update syntax diagrams to show the FILTER clause on aggregate functions. Start a change log for version 3.30.0. (check-in: ba9800704d user: drh tags: trunk) | |
Changes
Changes to pages/changes.in.
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19 20 21 22 23 24 25 26 27 28 29 30 31 32 | set aChng($nChng) [list $date $desc $options] set xrefChng($date) $nChng incr nChng } chng {2019-10-00 (3.30.0)} { <li> Add support for the [FILTER clause on aggregate functions]. } chng {2019-07-10 (3.29.0)} { <li> Added the [SQLITE_DBCONFIG_DQS_DML] and [SQLITE_DBCONFIG_DQS_DDL] actions to [sqlite3_db_config()] for activating and deactivating the [double-quoted string literal] misfeature. Both default to "on" for legacy compatibility, but developers are encouraged to turn them | > > > | 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | set aChng($nChng) [list $date $desc $options] set xrefChng($date) $nChng incr nChng } chng {2019-10-00 (3.30.0)} { <li> Add support for the [FILTER clause on aggregate functions]. <li> The [index_info] and [index_xinfo] pragmas are enhanced to provide information about the on-disk representation of [WITHOUT ROWID] tables. } chng {2019-07-10 (3.29.0)} { <li> Added the [SQLITE_DBCONFIG_DQS_DML] and [SQLITE_DBCONFIG_DQS_DDL] actions to [sqlite3_db_config()] for activating and deactivating the [double-quoted string literal] misfeature. Both default to "on" for legacy compatibility, but developers are encouraged to turn them |
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Changes to pages/pragma.in.
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1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 | <p>Output columns from the index_info pragma are as follows: <ol> <li>^(The rank of the column within the index. (0 means left-most.))^ <li>^The rank of the column within the table being indexed. <li>^The name of the column being indexed. </ol> } Pragma index_xinfo { <p>^(<b>PRAGMA DB.index_xinfo(</b><i>index-name</i><b>);</b></p> <p>This pragma returns information about every column in an index.)^ ^(Unlike this [index_info pragma], this pragma returns information about every column in the index, not just the key columns.)^ | > > > > > > > | 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 | <p>Output columns from the index_info pragma are as follows: <ol> <li>^(The rank of the column within the index. (0 means left-most.))^ <li>^The rank of the column within the table being indexed. <li>^The name of the column being indexed. </ol> <p>If there is no index named <i>index-name</i> but there is a [WITHOUT ROWID] table name <i>index_name</i>, then (as of SQLite [version 3.30.0] on [dateof:3.30.0]) this pragma returns the PRIMARY KEY columns of the WITHOUT ROWID table as they are used in the records of the underlying b-tree, which is to say with duplicate columns removed. } Pragma index_xinfo { <p>^(<b>PRAGMA DB.index_xinfo(</b><i>index-name</i><b>);</b></p> <p>This pragma returns information about every column in an index.)^ ^(Unlike this [index_info pragma], this pragma returns information about every column in the index, not just the key columns.)^ |
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1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 | <li>^1 if the index-column is sorted in reverse (DESC) order by the index and 0 otherwise. <li>^The name for the [collating sequence] used to compare values in the index-column. <li>^1 if the index-column is a key column and 0 if the index-column is an auxiliary column. </ol> } Pragma index_list { <p>^(<b>PRAGMA DB.index_list(</b><i>table-name</i><b>);</b></p> <p>This pragma returns one row for each index associated with the given table.)^ <p>Output columns from the index_list pragma are as follows: | > > > > > > > | 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 | <li>^1 if the index-column is sorted in reverse (DESC) order by the index and 0 otherwise. <li>^The name for the [collating sequence] used to compare values in the index-column. <li>^1 if the index-column is a key column and 0 if the index-column is an auxiliary column. </ol> <p>If there is no index named <i>index-name</i> but there is a [WITHOUT ROWID] table name <i>index_name</i>, then (as of SQLite [version 3.30.0] on [dateof:3.30.0]) this pragma returns the columns of the WITHOUT ROWID table as they are used in the records of the underlying b-tree, which is to say with de-duplicated PRIMARY KEY columns first followed by data columns. } Pragma index_list { <p>^(<b>PRAGMA DB.index_list(</b><i>table-name</i><b>);</b></p> <p>This pragma returns one row for each index associated with the given table.)^ <p>Output columns from the index_list pragma are as follows: |
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