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Content of MON$EXPLAINED_PLAN in MON$STATEMENTS is truncated if exceeds the 32KB limit [CORE4708] #5016

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firebird-issue-importer opened this issue Mar 14, 2015 · 11 comments

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@firebird-issue-importer

Submitted by: @livius2

I read that to get unlimited text of explained plan i should look into
TMP$STATEMENTS

but i got limited text in MON$EXPLAINED_PLAN in MON$STATEMENTS for some big
query
it end after 14 808 bytes as
"Select Expression
-"
nothing more

Commits: 3b04931 FirebirdSQL/fbt-repository@04e7897

====== Test Details ======

Test query has explained plan with length ~47 Kb (checked on WI-V3.0.0.32253).
Instead of checking explained plan text it is enough only to ensure that its
LENGTH is more than 32K and that text is not cuted off, i.e. it should end with
phrase: Table "MON$STATEMENTS" Full Scan
Another sample of query that has long plan see in core_5061.fbt

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firebird-issue-importer commented Mar 14, 2015

Modified by: @livius2

Version: 3.0 Beta 2 [ 10586 ]

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firebird-issue-importer commented Mar 14, 2015

Modified by: @dyemanov

assignee: Dmitry Yemanov [ dimitr ]

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firebird-issue-importer commented Mar 16, 2015

Commented by: @livius2

To test this you can run query from CORE4710
but i see that this is not only 14808 bytes limit but sometimes smaller value

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firebird-issue-importer commented Jul 5, 2015

Modified by: @dyemanov

Fix Version: 3.0 RC 1 [ 10584 ]

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firebird-issue-importer commented Oct 19, 2015

Modified by: @dyemanov

Fix Version: 3.0 RC 1 [ 10584 ] =>

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firebird-issue-importer commented Oct 27, 2015

Modified by: @dyemanov

Fix Version: 3.0.0 [ 10048 ]

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firebird-issue-importer commented Dec 29, 2015

Modified by: @dyemanov

summary: content of MON$EXPLAINED_PLAN in MON$STATEMENTS is limited to 14 808 bytes => Content of MON$EXPLAINED_PLAN in MON$STATEMENTS is truncated if exceeds the 32KB limit

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firebird-issue-importer commented Dec 29, 2015

Modified by: @dyemanov

status: Open [ 1 ] => Resolved [ 5 ]

resolution: Fixed [ 1 ]

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firebird-issue-importer commented Dec 30, 2015

Modified by: @pavel-zotov

status: Resolved [ 5 ] => Resolved [ 5 ]

QA Status: Done successfully

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firebird-issue-importer commented Jan 5, 2016

Modified by: @pavel-zotov

status: Resolved [ 5 ] => Resolved [ 5 ]

Test Details: Test query has explained plan with length ~47 Kb (checked on WI-V3.0.0.32253).
Instead of checking explained plan text it is enough only to ensure that its
LENGTH is more than 32K and that text is not cuted off, i.e. it should end with
phrase: Table "MON$STATEMENTS" Full Scan
Another sample of query that has long plan see in core_5061.fbt

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firebird-issue-importer commented Jan 5, 2016

Modified by: @pavel-zotov

status: Resolved [ 5 ] => Closed [ 6 ]

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