On Wed, Jan 26, 2022 at 1:13 PM Julien Rouhaud <rjuju123@xxxxxxxxx> wrote: > > > > Why is this (ignoring the Index) and what could be done? > > [...] > > create INDEX d01ort on d01buch(d01ort) ;/* D01ORT */ > > That index can't be used with a LIKE that has a trailing wildcard. Really? That seems to contradict the doc, i.e. default index type is B-Tree, which definitely supports trailing wildcard LIKE-predicates, as explicitly stated in said doc: https://www.postgresql.org/docs/14/indexes-types.html#INDEXES-TYPES-BTREE So what makes you say that? --DD PS: That also contradicts the small demo I made earlier up-thread: ``` ddevienne=> \d+ pg_class Indexes: "pg_class_oid_index" UNIQUE, btree (oid) "pg_class_relname_nsp_index" UNIQUE, btree (relname, relnamespace) <<<<<<<<< "pg_class_tblspc_relfilenode_index" btree (reltablespace, relfilenode) ``` Whether the index is UNIQUE or not does not matter in this case.
