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Rename jsonb_hash_ops to jsonb_path_ops.

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There's no longer much pressure to switch the default GIN opclass for
jsonb, but there was still some unhappiness with the name "jsonb_hash_ops",
since hashing is no longer a distinguishing property of that opclass,
and anyway it seems like a relatively minor detail.  At the suggestion of
Heikki Linnakangas, we'll use "jsonb_path_ops" instead; that captures the
important characteristic that each index entry depends on the entire path
from the document root to the indexed value.

Also add a user-facing explanation of the implementation properties of
these two opclasses.
This commit is contained in:
Tom Lane
2014-05-11 12:06:04 -04:00
parent e136271a94
commit 12e611d43e
12 changed files with 78 additions and 44 deletions
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12
src/include/utils/jsonb.h
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@ -332,18 +332,18 @@ extern Datum jsonb_eq(PG_FUNCTION_ARGS);
extern Datum jsonb_cmp(PG_FUNCTION_ARGS);
extern Datum jsonb_hash(PG_FUNCTION_ARGS);
/* GIN support functions */
/* GIN support functions for jsonb_ops */
extern Datum gin_compare_jsonb(PG_FUNCTION_ARGS);
extern Datum gin_extract_jsonb(PG_FUNCTION_ARGS);
extern Datum gin_extract_jsonb_query(PG_FUNCTION_ARGS);
extern Datum gin_consistent_jsonb(PG_FUNCTION_ARGS);
extern Datum gin_triconsistent_jsonb(PG_FUNCTION_ARGS);
/* GIN hash opclass functions */
extern Datum gin_extract_jsonb_hash(PG_FUNCTION_ARGS);
extern Datum gin_extract_jsonb_query_hash(PG_FUNCTION_ARGS);
extern Datum gin_consistent_jsonb_hash(PG_FUNCTION_ARGS);
extern Datum gin_triconsistent_jsonb_hash(PG_FUNCTION_ARGS);
/* GIN support functions for jsonb_path_ops */
extern Datum gin_extract_jsonb_path(PG_FUNCTION_ARGS);
extern Datum gin_extract_jsonb_query_path(PG_FUNCTION_ARGS);
extern Datum gin_consistent_jsonb_path(PG_FUNCTION_ARGS);
extern Datum gin_triconsistent_jsonb_path(PG_FUNCTION_ARGS);
/* Support functions */
extern int compareJsonbContainers(JsonbContainer *a, JsonbContainer *b);