168 Commits (a7f107df2b700c859e4d9ad2ca66b07a465d6223)

Author	SHA1	Message	Date
Jan Wieck	397e9b32a3	Some changes to prepare for LONG attributes. ... Jan	26 years ago
Tom Lane	c8c3e07e58	Clean up possible memory leakage in nodeSubplan	26 years ago
Tom Lane	f68e11f373	Implement subselects in target lists. Also, relax requirement that ... subselects can only appear on the righthand side of a binary operator. That's still true for quantified predicates like x = ANY (SELECT ...), but a subselect that delivers a single result can now appear anywhere in an expression. This is implemented by changing EXPR_SUBLINK sublinks to represent just the (SELECT ...) expression, without any 'left hand side' or combining operator --- so they're now more like EXISTS_SUBLINK. To handle the case of '(x, y, z) = (SELECT ...)', I added a new sublink type MULTIEXPR_SUBLINK, which acts just like EXPR_SUBLINK used to. But the grammar will only generate one for a multiple-left-hand-side row expression.	26 years ago
Tom Lane	ac61a04a71	Fix ExecSubPlan to handle nulls per the SQL spec --- it didn't combine ... nulls with non-nulls using proper three-valued boolean logic. Also clean up ExecQual to make it clearer that ExecQual *does* follow the SQL spec for boolean nulls. See '[BUGS] (null) != (null)' thread around 10/26/99 for more detail.	26 years ago
Tom Lane	e812458b27	Several changes here, not very related but touching some of the same files. ... * Buffer refcount cleanup (per my "progress report" to pghackers, 9/22). * Add links to backend PROC structs to sinval's array of per-backend info, and use these links for routines that need to check the state of all backends (rather than the slow, complicated search of the ShmemIndex hashtable that was used before). Add databaseOID to PROC structs. * Use this to implement an interlock that prevents DESTROY DATABASE of a database containing running backends. (It's a little tricky to prevent a concurrently-starting backend from getting in there, since the new backend is not able to lock anything at the time it tries to look up its database in pg_database. My solution is to recheck that the DB is OK at the end of InitPostgres. It may not be a 100% solution, but it's a lot better than no interlock at all...) * In ALTER TABLE RENAME, flush buffers for the relation before doing the rename of the physical files, to ensure we don't get failures later from mdblindwrt(). * Update TRUNCATE patch so that it actually compiles against current sources :-(. You should do "make clean all" after pulling these changes.	26 years ago
Tom Lane	42af56e1ea	Revise implementation of SubLinks so that there is a consistent, ... documented intepretation of the lefthand and oper fields. Fix a number of obscure problems while at it --- for example, the old code failed if the parser decided to insert a type-coercion function just below the operator of a SubLink. CAUTION: this will break stored rules that contain subplans. You may need to initdb.	26 years ago
Bruce Momjian	a71802e12e	Final cleanup.	27 years ago
Bruce Momjian	2e6b1e63a3	Remove unused #includes in *.c files.	27 years ago
Bruce Momjian	07842084fe	pgindent run over code.	27 years ago
Tom Lane	a58843b49a	Fix problems seen when result of a subselect was used in an ... expression context (ie, not at the top level of a WHERE clause). Examples like this one work now: SELECT name, value FROM t1 as touter WHERE (value/(SELECT AVG(value) FROM t1 WHERE name = touter.name)) > 0.75;	27 years ago
Bruce Momjian	6724a50787	Change my-function-name-- to my_function_name, and optimizer renames.	27 years ago
Vadim B. Mikheev	072be47202	Initialize es_snapshot.	27 years ago
Bruce Momjian	fa1a8d6a97	OK, folks, here is the pgindent output.	27 years ago
Bruce Momjian	af74855a60	Renaming cleanup, no pgindent yet.	27 years ago
Vadim B. Mikheev	1a6de0760d	Check SELECT permissions in subqueries.	28 years ago
Bruce Momjian	a32450a585	pgindent run before 6.3 release, with Thomas' requested changes.	28 years ago
Vadim B. Mikheev	ed875a4132	Fix for InitPlan-s: have to copy subselect' result tuple.	28 years ago
Vadim B. Mikheev	1a105cefbd	Support for subselects. ... ExecReScan for nodeAgg, nodeHash, nodeHashjoin, nodeNestloop and nodeResult. Fixed ExecReScan for nodeMaterial. Get rid of #ifdef INDEXSCAN_PATCH. Get rid of ExecMarkPos and ExecRestrPos in nodeNestloop.	28 years ago