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For example, oprleft is zero for a prefix operator.", "/versions/11/tables/0/rows/0/purpose": "search", "/versions/11/tables/0/rows/1/purpose": "search", "/versions/11/tables/0/rows/2/purpose": "search", "/versions/11/tables/0/columns/0/label": "Index AM", "/versions/11/tables/0/columns/1/label": "Family", "/versions/11/tables/0/columns/2/label": "Strategy", "/versions/11/tables/0/columns/3/label": "Purpose", "/versions/11/tables/0/columns/4/label": "Ordering family"}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "755c1d99374f582bfae7bb5cf36d49bbda1fd7539112c1108ba6aa4204001098"}, "comparison_data": {"operator": {"kind": "b", "symbol": "=", "negator": "<>(reltime,reltime)", "function": "reltimeeq(reltime,reltime)", "hash_join": "t", "left_type": "reltime", "commutator": "=(reltime,reltime)", "merge_join": "t", "right_type": "reltime", "result_type": "bool"}, "memberships": [{"family": "reltime_minmax_ops", "method": "brin", "purpose": "search", "operator": "=(reltime,reltime)", "strategy": "3", "left_type": "reltime", "right_type": "reltime", "sort_family": ""}, {"family": "reltime_ops", "method": "btree", "purpose": "search", "operator": "=(reltime,reltime)", "strategy": "3", "left_type": "reltime", "right_type": "reltime", "sort_family": ""}, {"family": "reltime_ops", "method": "hash", "purpose": "search", "operator": "=(reltime,reltime)", "strategy": "1", "left_type": "reltime", "right_type": "reltime", "sort_family": ""}]}, "comparison_hash": "c4440f53ad6737a332fff99e4b18e7d2779796971755771a16fe714ec70d5784", "manual_semantics": "Source catalog description; no additional matching manual operator definition claimed"}}}, "snapshot": null, "comparison": {"left": "11", "right": "12", "status": "removed", "diff": "--- PostgreSQL 11\n+++ PostgreSQL 12\n@@ -1,46 +1 @@\n-{\n-  \"memberships\": [\n-    {\n-      \"family\": \"reltime_minmax_ops\",\n-      \"left_type\": \"reltime\",\n-      \"method\": \"brin\",\n-      \"operator\": \"=(reltime,reltime)\",\n-      \"purpose\": \"search\",\n-      \"right_type\": \"reltime\",\n-      \"sort_family\": \"\",\n-      \"strategy\": \"3\"\n-    },\n-    {\n-      \"family\": \"reltime_ops\",\n-      \"left_type\": \"reltime\",\n-      \"method\": \"btree\",\n-      \"operator\": \"=(reltime,reltime)\",\n-      \"purpose\": \"search\",\n-      \"right_type\": \"reltime\",\n-      \"sort_family\": \"\",\n-      \"strategy\": \"3\"\n-    },\n-    {\n-      \"family\": \"reltime_ops\",\n-      \"left_type\": \"reltime\",\n-      \"method\": \"hash\",\n-      \"operator\": \"=(reltime,reltime)\",\n-      \"purpose\": \"search\",\n-      \"right_type\": \"reltime\",\n-      \"sort_family\": \"\",\n-      \"strategy\": \"1\"\n-    }\n-  ],\n-  \"operator\": {\n-    \"commutator\": \"=(reltime,reltime)\",\n-    \"function\": \"reltimeeq(reltime,reltime)\",\n-    \"hash_join\": \"t\",\n-    \"kind\": \"b\",\n-    \"left_type\": \"reltime\",\n-    \"merge_join\": \"t\",\n-    \"negator\": \"<>(reltime,reltime)\",\n-    \"result_type\": \"bool\",\n-    \"right_type\": \"reltime\",\n-    \"symbol\": \"=\"\n-  }\n-}\n+\u8be5\u7248\u672a\u6536\u5f55"}}