diff options
Diffstat (limited to 'src/backend/parser')
| -rw-r--r-- | src/backend/parser/analyze.c | 48 |
1 files changed, 47 insertions, 1 deletions
diff --git a/src/backend/parser/analyze.c b/src/backend/parser/analyze.c index e1be8a89467..226f7c76339 100644 --- a/src/backend/parser/analyze.c +++ b/src/backend/parser/analyze.c @@ -6,7 +6,7 @@ * Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/backend/parser/analyze.c,v 1.353.2.1 2007/06/20 18:21:08 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/parser/analyze.c,v 1.353.2.2 2008/12/13 02:00:52 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -432,6 +432,52 @@ transformStmt(ParseState *pstate, Node *parseTree, return result; } +/* + * analyze_requires_snapshot + * Returns true if a snapshot must be set before doing parse analysis + * on the given raw parse tree. + * + * Classification here should match transformStmt(). + */ +bool +analyze_requires_snapshot(Node *parseTree) +{ + bool result; + + switch (nodeTag(parseTree)) + { + /* + * Optimizable statements + */ + case T_InsertStmt: + case T_DeleteStmt: + case T_UpdateStmt: + case T_SelectStmt: + result = true; + break; + + /* + * Special cases + */ + case T_DeclareCursorStmt: + /* yes, because it's analyzed just like SELECT */ + result = true; + break; + + case T_ExplainStmt: + /* yes, because it's analyzed just like SELECT */ + result = true; + break; + + default: + /* other utility statements don't have any active parse analysis */ + result = false; + break; + } + + return result; +} + static Query * transformViewStmt(ParseState *pstate, ViewStmt *stmt, List **extras_before, List **extras_after) |