postgres

History

Tom Lane 65c5fcd353 Restructure index access method API to hide most of it at the C level. This patch reduces pg_am to just two columns, a name and a handler function. All the data formerly obtained from pg_am is now provided in a C struct returned by the handler function. This is similar to the designs we've adopted for FDWs and tablesample methods. There are multiple advantages. For one, the index AM's support functions are now simple C functions, making them faster to call and much less error-prone, since the C compiler can now check function signatures. For another, this will make it far more practical to define index access methods in installable extensions. A disadvantage is that SQL-level code can no longer see attributes of index AMs; in particular, some of the crosschecks in the opr_sanity regression test are no longer possible from SQL. We've addressed that by adding a facility for the index AM to perform such checks instead. (Much more could be done in that line, but for now we're content if the amvalidate functions more or less replace what opr_sanity used to do.) We might also want to expose some sort of reporting functionality, but this patch doesn't do that. Alexander Korotkov, reviewed by Petr Jelínek, and rather heavily editorialized on by me.		10 years ago
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Makefile	Extract restriction OR clauses whether or not they are indexable.	12 years ago
clauses.c	Update copyright for 2016	10 years ago
joininfo.c	Update copyright for 2016	10 years ago
orclauses.c	Update copyright for 2016	10 years ago
pathnode.c	Update copyright for 2016	10 years ago
placeholder.c	Update copyright for 2016	10 years ago
plancat.c	Restructure index access method API to hide most of it at the C level.	10 years ago
predtest.c	Update copyright for 2016	10 years ago
relnode.c	Update copyright for 2016	10 years ago
restrictinfo.c	Update copyright for 2016	10 years ago
tlist.c	Update copyright for 2016	10 years ago
var.c	Update copyright for 2016	10 years ago