diff options
Diffstat (limited to 'src/include/access/amapi.h')
| -rw-r--r-- | src/include/access/amapi.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/include/access/amapi.h b/src/include/access/amapi.h index 4325faa460b..85b4766016f 100644 --- a/src/include/access/amapi.h +++ b/src/include/access/amapi.h @@ -54,6 +54,42 @@ typedef enum IndexAMProperty AMPROP_CAN_INCLUDE } IndexAMProperty; +/* + * We use lists of this struct type to keep track of both operators and + * support functions while building or adding to an opclass or opfamily. + * amadjustmembers functions receive lists of these structs, and are allowed + * to alter their "ref" fields. + * + * The "ref" fields define how the pg_amop or pg_amproc entry should depend + * on the associated objects (that is, which dependency type to use, and + * which opclass or opfamily it should depend on). + * + * If ref_is_hard is true, the entry will have a NORMAL dependency on the + * operator or support func, and an INTERNAL dependency on the opclass or + * opfamily. This forces the opclass or opfamily to be dropped if the + * operator or support func is dropped, and requires the CASCADE option + * to do so. Nor will ALTER OPERATOR FAMILY DROP be allowed. This is + * the right behavior for objects that are essential to an opclass. + * + * If ref_is_hard is false, the entry will have an AUTO dependency on the + * operator or support func, and also an AUTO dependency on the opclass or + * opfamily. This allows ALTER OPERATOR FAMILY DROP, and causes that to + * happen automatically if the operator or support func is dropped. This + * is the right behavior for inessential ("loose") objects. + */ +typedef struct OpFamilyMember +{ + bool is_func; /* is this an operator, or support func? */ + Oid object; /* operator or support func's OID */ + int number; /* strategy or support func number */ + Oid lefttype; /* lefttype */ + Oid righttype; /* righttype */ + Oid sortfamily; /* ordering operator's sort opfamily, or 0 */ + bool ref_is_hard; /* hard or soft dependency? */ + bool ref_is_family; /* is dependency on opclass or opfamily? */ + Oid refobjid; /* OID of opclass or opfamily */ +} OpFamilyMember; + /* * Callback function signatures --- see indexam.sgml for more info. @@ -114,6 +150,12 @@ typedef char *(*ambuildphasename_function) (int64 phasenum); /* validate definition of an opclass for this AM */ typedef bool (*amvalidate_function) (Oid opclassoid); +/* validate operators and support functions to be added to an opclass/family */ +typedef void (*amadjustmembers_function) (Oid opfamilyoid, + Oid opclassoid, + List *operators, + List *functions); + /* prepare for index scan */ typedef IndexScanDesc (*ambeginscan_function) (Relation indexRelation, int nkeys, @@ -224,6 +266,7 @@ typedef struct IndexAmRoutine amproperty_function amproperty; /* can be NULL */ ambuildphasename_function ambuildphasename; /* can be NULL */ amvalidate_function amvalidate; + amadjustmembers_function amadjustmembers; /* can be NULL */ ambeginscan_function ambeginscan; amrescan_function amrescan; amgettuple_function amgettuple; /* can be NULL */ |