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Add the ability to create indexes 'concurrently', that is, without

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blocking concurrent writes to the table.  Greg Stark, with a little help
from Tom Lane.
This commit is contained in:
Tom Lane
2006-08-25 04:06:58 +00:00
parent 8f91e2b607
commit e093dcdd28
34 changed files with 1025 additions and 138 deletions
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43
src/backend/utils/adt/tid.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/tid.c,v 1.54 2006/07/21 20:51:32 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/tid.c,v 1.55 2006/08/25 04:06:53 tgl Exp $
*
* NOTES
* input routine largely stolen from boxin().
@ -158,36 +158,13 @@ tidsend(PG_FUNCTION_ARGS)
* PUBLIC ROUTINES *
*****************************************************************************/
static int32
tid_cmp_internal(ItemPointer arg1, ItemPointer arg2)
{
/*
* Don't use ItemPointerGetBlockNumber or ItemPointerGetOffsetNumber here,
* because they assert ip_posid != 0 which might not be true for a
* user-supplied TID.
*/
BlockNumber b1 = BlockIdGetBlockNumber(&(arg1->ip_blkid));
BlockNumber b2 = BlockIdGetBlockNumber(&(arg2->ip_blkid));
if (b1 < b2)
return -1;
else if (b1 > b2)
return 1;
else if (arg1->ip_posid < arg2->ip_posid)
return -1;
else if (arg1->ip_posid > arg2->ip_posid)
return 1;
else
return 0;
}
Datum
tideq(PG_FUNCTION_ARGS)
{
ItemPointer arg1 = PG_GETARG_ITEMPOINTER(0);
ItemPointer arg2 = PG_GETARG_ITEMPOINTER(1);
PG_RETURN_BOOL(tid_cmp_internal(arg1,arg2) == 0);
PG_RETURN_BOOL(ItemPointerCompare(arg1,arg2) == 0);
}
Datum
@ -196,7 +173,7 @@ tidne(PG_FUNCTION_ARGS)
ItemPointer arg1 = PG_GETARG_ITEMPOINTER(0);
ItemPointer arg2 = PG_GETARG_ITEMPOINTER(1);
PG_RETURN_BOOL(tid_cmp_internal(arg1,arg2) != 0);
PG_RETURN_BOOL(ItemPointerCompare(arg1,arg2) != 0);
}
Datum
@ -205,7 +182,7 @@ tidlt(PG_FUNCTION_ARGS)
ItemPointer arg1 = PG_GETARG_ITEMPOINTER(0);
ItemPointer arg2 = PG_GETARG_ITEMPOINTER(1);
PG_RETURN_BOOL(tid_cmp_internal(arg1,arg2) < 0);
PG_RETURN_BOOL(ItemPointerCompare(arg1,arg2) < 0);
}
Datum
@ -214,7 +191,7 @@ tidle(PG_FUNCTION_ARGS)
ItemPointer arg1 = PG_GETARG_ITEMPOINTER(0);
ItemPointer arg2 = PG_GETARG_ITEMPOINTER(1);
PG_RETURN_BOOL(tid_cmp_internal(arg1,arg2) <= 0);
PG_RETURN_BOOL(ItemPointerCompare(arg1,arg2) <= 0);
}
Datum
@ -223,7 +200,7 @@ tidgt(PG_FUNCTION_ARGS)
ItemPointer arg1 = PG_GETARG_ITEMPOINTER(0);
ItemPointer arg2 = PG_GETARG_ITEMPOINTER(1);
PG_RETURN_BOOL(tid_cmp_internal(arg1,arg2) > 0);
PG_RETURN_BOOL(ItemPointerCompare(arg1,arg2) > 0);
}
Datum
@ -232,7 +209,7 @@ tidge(PG_FUNCTION_ARGS)
ItemPointer arg1 = PG_GETARG_ITEMPOINTER(0);
ItemPointer arg2 = PG_GETARG_ITEMPOINTER(1);
PG_RETURN_BOOL(tid_cmp_internal(arg1,arg2) >= 0);
PG_RETURN_BOOL(ItemPointerCompare(arg1,arg2) >= 0);
}
Datum
@ -241,7 +218,7 @@ bttidcmp(PG_FUNCTION_ARGS)
ItemPointer arg1 = PG_GETARG_ITEMPOINTER(0);
ItemPointer arg2 = PG_GETARG_ITEMPOINTER(1);
PG_RETURN_INT32(tid_cmp_internal(arg1, arg2));
PG_RETURN_INT32(ItemPointerCompare(arg1, arg2));
}
Datum
@ -250,7 +227,7 @@ tidlarger(PG_FUNCTION_ARGS)
ItemPointer arg1 = PG_GETARG_ITEMPOINTER(0);
ItemPointer arg2 = PG_GETARG_ITEMPOINTER(1);
PG_RETURN_ITEMPOINTER(tid_cmp_internal(arg1,arg2) >= 0 ? arg1 : arg2);
PG_RETURN_ITEMPOINTER(ItemPointerCompare(arg1,arg2) >= 0 ? arg1 : arg2);
}
Datum
@ -259,7 +236,7 @@ tidsmaller(PG_FUNCTION_ARGS)
ItemPointer arg1 = PG_GETARG_ITEMPOINTER(0);
ItemPointer arg2 = PG_GETARG_ITEMPOINTER(1);
PG_RETURN_ITEMPOINTER(tid_cmp_internal(arg1,arg2) <= 0 ? arg1 : arg2);
PG_RETURN_ITEMPOINTER(ItemPointerCompare(arg1,arg2) <= 0 ? arg1 : arg2);
}