fix(sql): fixed PG ODBC driver compatibility problems

[bluestreak01]

Fixed #2026

• fixed few more PG metadata SQLs
• fixed double-free in join generator, in case there is exception
• fixed incorrect join optimisation, which lead to assertion errors
• improved PG SQL compatibility

PG can execute the following SQL, while without this PR we could not

select a.f, b.p from (tab1 a join tab2 b on id)

Notice that join is inside braces, which QuestDB was interpreting as sub-query and could not reference tables within by aliases a and b. Now SQL parser will remove bracket in this simplified case to rewrite the above SQL as:

select a.f, b.p from tab1 a join tab2 b on id

to allow aliases to be used.

All "real" sub-queries are not affected.

Also, fixed SQL execution from Excel:

[ideoma]

[PR Coverage check]

😍 pass : 320 / 331 (96.68%)

file detail

	path	covered line	new line	coverage
🔵	io/questdb/griffin/SqlCompiler.java	69	77	89.61%
🔵	io/questdb/griffin/engine/functions/array/IntArrayDereferenceHackFunctionFactory.java	9	10	90.00%
🔵	io/questdb/griffin/engine/functions/eq/EqBooleanCharFunctionFactory.java	11	12	91.67%
🔵	io/questdb/griffin/SqlParser.java	77	78	98.72%
🔵	io/questdb/griffin/engine/functions/catalogue/ShowTimeZoneFactory.java	1	1	100.00%
🔵	io/questdb/griffin/engine/functions/catalogue/ShowStandardConformingStringsCursorFactory.java	1	1	100.00%
🔵	io/questdb/griffin/engine/functions/catalogue/ShowTransactionIsolationLevelCursorFactory.java	1	1	100.00%
🔵	io/questdb/griffin/engine/functions/catalogue/AttrDefCatalogueFunctionFactory.java	1	1	100.00%
🔵	io/questdb/griffin/engine/functions/catalogue/AbstractClassCatalogueFunctionFactory.java	5	5	100.00%
🔵	io/questdb/griffin/engine/functions/catalogue/PgGetSIExprFunctionFactory.java	4	4	100.00%
🔵	io/questdb/griffin/engine/functions/catalogue/SingleValueRecordCursor.java	1	1	100.00%
🔵	io/questdb/griffin/model/QueryModel.java	69	69	100.00%
🔵	io/questdb/griffin/engine/functions/catalogue/PrefixedAttrDefCatalogueFunctionFactory.java	2	2	100.00%
🔵	io/questdb/griffin/engine/functions/catalogue/AttributeCatalogueFunctionFactory.java	2	2	100.00%
🔵	io/questdb/griffin/engine/functions/catalogue/ShowSearchPathCursorFactory.java	1	1	100.00%
🔵	io/questdb/griffin/engine/functions/catalogue/ShowMaxIdentifierLengthCursorFactory.java	10	10	100.00%
🔵	io/questdb/griffin/engine/functions/catalogue/PrefixedPgGetSIExprFunctionFactory.java	1	1	100.00%
🔵	io/questdb/griffin/SqlCodeGenerator.java	1	1	100.00%
🔵	io/questdb/griffin/SqlOptimiser.java	2	2	100.00%
🔵	io/questdb/griffin/SqlKeywords.java	48	48	100.00%
🔵	io/questdb/griffin/engine/functions/catalogue/IntValueRecord.java	4	4	100.00%

[bziobrowski]

👍