Naz Gassiep <[EMAIL PROTECTED]> writes: > As a result, when creating tables containing large blocks of text I wish > to index, I've been using HASH as an index method. Please can we state > in the manual that HASH index types are in a beta stage of development > or something similar, or perhaps remove the manual entry altogether > until HASH is at a point where it is usable in production.
Uh, the manual already does say Note: Testing has shown PostgreSQL's hash indexes to perform no better than B-tree indexes, and the index size and build time for hash indexes is much worse. Furthermore, hash index operations are not presently WAL-logged, so hash indexes might need to be rebuilt with REINDEX after a database crash. For these reasons, hash index use is presently discouraged. under 11.2 Index Types, as well as various derogatory remarks elsewhere. regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match