* Don't generate ssh keys for gpadmin if already present

* Let rest of the logic flow if the private key is present.

* docs - add distribution and skew topic, address random dist skew

* clarify single tuple assigned to first segment

If interconnect_context cannot be allocated in
SetupTCPInterconnect, TeardownTCPInterconnect
would suffer from SIGSEGV. This PR fixes it.

Do not update rx_buffer_pool.maxCount when tear down
connection if conn->pkt_q is failed to be assigned a
valid address in set up connection.

to definite the reusing external table by themselves instead of
searching in gpload, which may have bad performance if there are
too many external tables.

Author: David Sharp <dsharp@pivotal.io>
Author: Amil Khanzada <akhanzada@pivotal.io>
(cherry picked from commit 952090a6)

In addition to commit b8d7a7e9, `oom_dumpusage` test query needs to be
updated to hit OOM limit.

The existing memory accounting test for OOM was not able to exceed the
OOM bound due to the plan generated by ORCA v2.53.11. Prior to that the
it would hit the OOM limit.  This commit updates the
test query to exceed OOM with the latest version of ORCA and also bump
the version to 2.53.11.
Signed-off-by: NAbhijit Subramanya <asubramanya@pivotal.io>
(cherry picked from commit addc1c44)

Author: Karen Huddleston <khuddleston@pivotal.io>

Author: Karen Huddleston <khuddleston@pivotal.io>

-updated XFS mount options
-updated GPDB/ipv4_local_port_range information
-added example for setting blockdev.

PR for 5X_STABLE
Will be ported to MAIN

Signed-off-by: NJesse Zhang <sbjesse@gmail.com>
Signed-off-by: NMelanie Plageman <mplageman@pivotal.io>

When build remap info for fields of type described by given
tupledesc, set tupledesc in remapper only when remapping
is required.

This patch removes codegen wholesale from Greenplum.

In addition to reverting the commits involving codegen, we also removed
miscellaneous references to the feature and GUC.

The following commits from 5.0.0 were reverted (topologically ordered):

f38c9064 Support avg aggregate function in codegen
87dcae4c Capture and print error messages from llvm::verifyFunction
65137540 libgpcodegen assert() overrides use GPDB Assert()
81d378b4 GenerateExecVariableList calls regular slot_getattr when the code generation of the latter fails
05a28211 Update Google Test source path used by codegen
22a35fcc Call ereport when code generating float operators
79517271 Support overflow checks for doubles.
b5373a1e Fix codegen unittest link problem
7a1a98c9 Print filename and lineno in codegened CreateElog
58eda293 Fix wrong virtual tuple check in codegened slot_getattr
bc6faa08 Set llvm_isNull_ptr to false when the result of codegened expression evaluation is not null
8bbbd63f Enhance codegened advance_aggregates with support for null attributes
e1fd6072 Abort code generation of expression evaluation trees with unsupported ExprState types
509460ee Support null attributes in codegen expression evaluation framework
739d978d Move enrollment of codegened ExecVariableList to ExecInitNode
c05528d1 Fix CHECK_SYMBOL_DEFINED macro in CMakeLists.txt
12cfd7bd Support offset calculation when there is null in the tuple and codegen is enabled
40a2631e Use slot_getattr wrapper function for regular version.(#1194)
613e9fbb Revert "Fix codegen issue by moving slot_getattr to heaptuple.c similar to"
ee03f799 Fix cpplint error on advance aggregate
2a65b0aa Fix slot function nullptr issue in expr eval.
3107fc0e Fix for !(expr1 & expr2) and hasnull logic in slot_getatrr codegen.
c940c7f6 Fix codegen issue by moving slot_getattr to heaptuple.c similar to Postgres.
c8125736 Introduce guc to enable/disable all generator.
a4f39507 Ensure that codegen unittests pass with GCC 6.2.0 (#1177)
682d0b28 Allow overriding assert() functionality in libgpcodegen in DEBUG mode
3209258a Organize codegen source files and unit tests
d2ba88a9 Fix codegen unittests using DatumCastGenerator
020b71a5 Generate code for COUNT aggregate function
0eeec886 Fixing codegen related bugs in InitializeSupportedFunction
41055352 Rewrite PGGenericFuncGenerator to support variable number of types
e5318b6b Add AdvanceAggregatesCodegenEnroll mock function
87521715 Codegen advance_aggregates for SUM transition function
2043d95b Use string messages in codegened slot_getattr fallback block
f160fa5a Add new GUC to control Codegen Optimization level.
697ffc1a Fix cpplint errors
c5e3aed4 Support Virtual Tuples and Memtuples in SlotGetAttrCodegen
5996aaa7 Keep a reference to the CodegenManager in code generators
6833b3c2 Remove unused header and just include what you use in codegen
ab1eda87 Allow setting codegen guc to ON only if code generation is supported by the build
dcd40712 Use PGFuncGeneratorInfo to codegen pg functions
83869d1c Replace dynamic_cast with dyn_cast for llvm objects
23007017 Decide what to generate for ExecEvalExpr based on PlanState
387d8ce8 Add EXPLAIN CODEGEN to print generated IR to the client
c4a9bd27 Introduce Datum to cpp cast, cpp type to Datum cast  and normal cast.(#944)
66158dfd Record external function names for useful debugging
adab9120 Support variable length attributes in SlotGetAttrCodegen.
335e09aa Proclaim that the codegen'ed version of generated functions are called in debug build
50fd9140 Fix cpplint errors
88a04412 Use ExprTreeGeneratorInfo for expression tree generation.
3b4af3bb Split code generation of ExecVariableList from slot_getattr
8cd9ed9f Support <= operator for date/timestamp data types and some minor refactors.
e4dccf46 Implement InlineFunction to force inline at call site
71170942 Mock postmaster.o for codegen_framework_unittest.t
09f00581 Codegen expressions that contain plus, minus and mul operators on float8 data types
d7fb2f6d Fix codegen unittests on Linux and various compiler warnings while building codegen.
45f2aa96 Fix test and update coding style This closes #874
1b26fbfc Enrolled targetlist for scan and aggregate
ebd1d014 Enhance codegen framework to support arbitrary expr tree
ec626ce6 Generate and enroll naive ExecEvalExpr in Scan's quals
1186001e Revert "Create naive code-generated version of ExecQual"
6f928a65 Replace RegisterExternalFunction with GetOrRegisterExternalFunction using an unordered_map in codegen_utils
6ae0085b Move ElogWrapper to GpCodegenUtils.
d3f80b45 Add verifyfunction for generated llvm function.
7bcf094a Fix codegen compiler error with 8.3 merge
aae0ad3d Create naive code-generated version of ExecQual
dce266ad Minor code quality fixes in src/backend/codegen
d281f340 Support null attributes in code generated ExecVariableList
82fd418e Address a number of cpplint errors in codegen_utils_unittest.cc
887aa48d Add check for CodegenUtils::GetType for bool arrays
bb9b92c6 Enhance Base Codegen to do clean up when generation fails
b9ef5e3f Fix build error for Annotated types
a5cfefd9 Add support for array types in codegen_utils.
2b883384 Fix static_assert call
7b75d9ea This commit  generates code for code path: ExecVariableList > slot_getattr > _slot_getsomeattrs > slot_deform_tuple. This code path is executed during scan in simple select queries that do not have a where clause (e.g., select bar from foo;).
6d0a06e8 Fix CodeGen typos and CodeGeneratorManagerCreate function signature in gpcodegen_mock.c
4916a606 Add support for registering vararg external functions with codegen utils.
ae4a7754 Integrate codegen framework and make simple external call to slot deform tuple. This closes #649
ee5fb851 Renaming code_generator to codegen_utils and CodeGenerator to CodegenUtils. This closes #648
88e9baba Adding GPDB code generation utils
Signed-off-by: NSambitesh Dash <sdash@pivotal.io>
Signed-off-by: NJesse Zhang <sbjesse@gmail.com>
Signed-off-by: NMelanie Plageman <mplageman@pivotal.io>

-gpexpand - Add link to AdminGuide, Expanding a Greenplum System
-pljava_vmoptions - change set classification to reload from restart

* docs: gpbackup new options -include-table -exclude-table

-Add new options
-Update AdminGuide

PR for 5X_STABLE
Will be ported to MAIN

* docs: gpbackup - fix typos

PR for 5X_STABLE
Will be ported to MAIN

* docs: plcontainer logging and attribute updates.

-attribute names have changed for logging, and network
-the GUC log_min_messages controls the log level
-add note information about controlling container lifetime

PR for 5X_STABLE
Will be ported to MAIN

* docs: update for pl/container logging

* docs: plcontainer - udpates based on review comments.

* docs - plcontainer - review updates from dev. tracker stories

Add limitations
  -pl/container not supported when GPDB is run in Docker
  -multi-dimensional array not supported

Add ID max length 63 bytes
Clarify terminology
Update example output
Fix edits and typos

* docs: plcontainer - fix runtime-add example

* docs: pl/container does not support PL/R multi-dim. arrays

* docs: plcontainer - In Docker Images section, remove references to Pivotal.

To avoid being confused by a user-created function called "sum".

Fixes github issue #4185.

Author: Karen Huddleston <khuddleston@pivotal.io>
Author: Chris Hajas <chajas@pivotal.io>

Some of our OS container images have been updated to have conan 1.0.0.
This new version changes the conan install command a bit.

This commit brings in ORCA changes that ensure that a Materialize node is not
added under a Filter when its child contains outer references.  Otherwise, the
subplan is not rescanned (because it is under a Material), producing wrong
results. A rescan is necessary for it evaluates the subplan for each of the
outer referenced values.

For example:

```
SELECT * FROM A,B WHERE EXISTS (
  SELECT * FROM E WHERE E.j = A.j and B.i NOT IN (
    SELECT E.i FROM E WHERE E.i != 10));
```

For the above query ORCA produces a plan with two nested subplans:

```
Result
  Filter: (SubPlan 2)
  ->  Gather Motion 3:1
        ->  Nested Loop
              Join Filter: true
              ->  Broadcast Motion 3:3
                    ->  Table Scan on a
              ->  Table Scan on b
  SubPlan 2
    ->  Result
          Filter: public.c.j = $0
          ->  Materialize
                ->  Result
                      Filter: (SubPlan 1)
                      ->  Materialize
                            ->  Gather Motion 3:1
                                  ->  Table Scan on c
                      SubPlan 1
                        ->  Materialize
                              ->  Gather Motion 3:1
                                    ->  Table Scan on c
                                          Filter: i <> 10
```

The Materialize node (on top of Filter with Subplan 1) has cdb_strict = true.
The cdb_strict semantics dictate that when the Materialize is rescanned,
instead of destroying its tuplestore, it resets the accessor pointer to the
beginning and the subtree is NOT rescanned.
So the entries from the first scan are returned for all future calls; i.e. the
results depend on the first row output by the cross join. This causes wrong and
non-deterministic results.

Also, this commit reinstates this test in qp_correlated_query.sql. It also
fixes another wrong result caused by the same issue. Note that the changes in
rangefuncs_optimizer.out are because ORCA now no longer falls back for those
queries. Instead it produces a plan which is executed on master (instead of the
segments as was done by planner) which changes the error messages.

Also bump ORCA version to 2.53.8.
Signed-off-by: NEkta Khanna <ekhanna@pivotal.io>

We are now using regexp instead of versioned_file for the madlib_gppkg
resource so that we don't have to change the yml files after each
release.

Closes #4243 

* Have a separate docker file for gpadmin user

* Add indent package for centos6

Author: Sambitesh Dash <sdash@pivotal.io>
Author: Abhijit Subramanya <asubramanya@pivotal.io>