postgres

Commit Graph

Author	SHA1	Message	Date
Tom Lane	b310b6e31c	Revise collation derivation method and expression-tree representation. All expression nodes now have an explicit output-collation field, unless they are known to only return a noncollatable data type (such as boolean or record). Also, nodes that can invoke collation-aware functions store a separate field that is the collation value to pass to the function. This avoids confusion that arises when a function has collatable inputs and noncollatable output type, or vice versa. Also, replace the parser's on-the-fly collation assignment method with a post-pass over the completed expression tree. This allows us to use a more complex (and hopefully more nearly spec-compliant) assignment rule without paying for it in extra storage in every expression node. Fix assorted bugs in the planner's handling of collations by making collation one of the defining properties of an EquivalenceClass and by converting CollateExprs into discardable RelabelType nodes during expression preprocessing.	15 years ago
Magnus Hagander	9f2e211386	Remove cvs keywords from all files.	16 years ago
Tom Lane	fb5d05805b	Implement parser hooks for processing ColumnRef and ParamRef nodes, as per my recent proposal. As proof of concept, remove knowledge of Params from the core parser, arranging for them to be handled entirely by parser hook functions. It turns out we need an additional hook for that --- I had forgotten about the code that handles inferring a parameter's type from context. This is a preliminary step towards letting plpgsql handle its variables through parser hooks. Additional work remains to be done to expose the facility through SPI, but I think this is all the changes needed in the core parser.	16 years ago
Bruce Momjian	91509e6a87	Small wording improvements for source code READMEs.	18 years ago
Bruce Momjian	4d048b7b8b	Revert README cleanups.	18 years ago
Bruce Momjian	8cb3ad9f52	Revert sentence removal from nickname in FAQ.	18 years ago
Bruce Momjian	fca9fff41b	More README src cleanups.	18 years ago
Bruce Momjian	4e228447aa	Make source code READMEs more consistent. Add CVS tags to all README files.	18 years ago
Tom Lane	46379d6e60	Separate parse-analysis for utility commands out of parser/analyze.c (which now deals only in optimizable statements), and put that code into a new file parser/parse_utilcmd.c. This helps clarify and enforce the design rule that utility statements shouldn't be processed during the regular parse analysis phase; all interpretation of their meaning should happen after they are given to ProcessUtility to execute. (We need this because we don't retain any locks for a utility statement that's in a plan cache, nor have any way to detect that it's stale.) We are also able to simplify the API for parse_analyze() and related routines, because they will now always return exactly one Query structure. In passing, fix bug #3403 concerning trying to add a serial column to an existing temp table (this is largely Heikki's work, but we needed all that restructuring to make it safe).	19 years ago
Bruce Momjian	9cad9febb1	cleanup	28 years ago
Bruce Momjian	7f31669bea	Add Var.varlevelup to code. More parser cleanup.	28 years ago
Bruce Momjian	db00632e0f	Cleaups of comments.	29 years ago
Bruce Momjian	bac80c218e	Add README for parser directory	29 years ago

13 Commits (2fcedad3cac54ec01034f3e225dd7915e59ff8ff)