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Still to be done: fix docs and fix regression failures under auto_explain.
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This patch also removes buffer-usage statistics from the track_counts
output, since this (or the global server statistics) is deemed to be a better
interface to this information.
Itagaki Takahiro, reviewed by Euler Taveira de Oliveira.
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Without these functions, anyone outside of explain.c can't actually use
ExplainPrintPlan, because the ExplainState won't be initialized properly.
The user-visible result of this was a crash when using auto_explain with
the JSON output format.
Report by Euler Taveira de Oliveira. Analysis by Tom Lane. Patch by me.
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Takahiro Itagaki.
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There are probably still some adjustments to be made in the details
of the output, but this gets the basic structure in place.
Robert Haas
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The original syntax made it difficult to add options without making them
into reserved words. This change parenthesizes the options to avoid that
problem, and makes provision for an explicit (and perhaps non-Boolean)
value for each option. The original syntax is still supported, but only
for the two original options ANALYZE and VERBOSE.
As a test case, add a COSTS option that can suppress the planner cost
estimates. This may be useful for including EXPLAIN output in the regression
tests, which are otherwise unable to cope with cross-platform variations in
cost estimates.
Robert Haas
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provided by Andrew.
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get listed in custom_variable_classes.
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and change auto_explain's custom GUC variables to be named auto_explain.xxx
not just explain.xxx. Per discussion in connection with the
pg_stat_statements patch, it seems like a good idea to have the convention
that custom variable classes are named the same as their defining module.
Committing separately since this should happen regardless of what happens
with pg_stat_statements itself.
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slow-running queries.
Takahiro Itagaki
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