On 23 Feb 2018, at 6:28pm, Brian Curley <bpcur...@gmail.com> wrote: > If there's pragmas like table_info available...can these be made available > for parsing, or used as virtual tables for selection, etc?
In current versions of SQLite, you can use the results of PRAGMAs as if they are tables. See the "PRAGMA functions" section of <https://sqlite.org/pragma.html> For example, information about the columns in an index can be read using the index_info pragma as follows: sqlite> CREATE TABLE members (name TEXT COLLATE NOCASE, phone TEXT COLLATE NOCASE, weekrank INTEGER, yearrank INTEGER); sqlite> CREATE INDEX m_ry ON members (yearrank, weekrank); sqlite> .headers ON sqlite> .mode column sqlite> PRAGMA index_info(m_ry); seqno cid name ---------- ---------- ---------- 0 3 yearrank 1 2 weekrank The same content can be read using a SELECT command: sqlite> SELECT * FROM pragma_index_info('m_ry'); seqno cid name ---------- ---------- ---------- 0 3 yearrank 1 2 weekrank And, as with any other SELECT, you can modify the way the results are returned in the SELECT command ... sqlite> SELECT * FROM pragma_index_info('m_ry') ORDER BY cid;; seqno cid name ---------- ---------- ---------- 1 2 weekrank 0 3 yearrank Simon. _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
