View connect-by-vs-with-recursive-oracle.sql
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-- Copyright Data Geekery GmbH | |
-- | |
-- Licensed under the Apache License, Version 2.0 (the "License"); | |
-- you may not use this file except in compliance with the License. | |
-- You may obtain a copy of the License at | |
-- | |
-- http://www.apache.org/licenses/LICENSE-2.0 | |
-- | |
-- Unless required by applicable law or agreed to in writing, software | |
-- distributed under the License is distributed on an "AS IS" BASIS, |
View postgis-mandelbrot.sql
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with recursive | |
dims (r1, r2, i1, i2, s, it, p) as (values (-2::float, 1::float, -1.5::float, 1.5::float, 0.01::float, 100, 256.0::float)), | |
sprites (s) as (values (st_makepolygon(st_geomfromtext('linestring (0 0, 0 1, 1 1, 1 0, 0 0)')))), | |
n1 (r, i) as (select r, i from dims, generate_series((r1 / s)::int, (r2 / s)::int) r, generate_series((i1 / s)::int, (i2 / s)::int) i), | |
n2 (r, i) as (select r::float * s::float, i::float * s::float from dims, n1), | |
l (cr, ci, zr, zi, g, it, p) as ( | |
select r, i, 0::float, 0::float, 0, it, p from n2, dims | |
union all | |
select cr, ci, zr*zr - zi*zi + cr, 2 * zr * zi + ci, g + 1, it, p from l where g < it and zr*zr + zi*zi < p | |
), |
View git.log
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lukas@DESKTOP-F2SE3C1 MINGW64 ~/test | |
$ ll | |
total 1 | |
-rw-r--r-- 1 lukas 197609 12 Sep 14 19:50 test.txt | |
lukas@DESKTOP-F2SE3C1 MINGW64 ~/test | |
$ cat test.txt | |
a | |
b | |
c |
View postgresql-flat-vs-nested-rows.sql
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-- Copyright Data Geekery GmbH | |
-- | |
-- Licensed under the Apache License, Version 2.0 (the "License"); | |
-- you may not use this file except in compliance with the License. | |
-- You may obtain a copy of the License at | |
-- | |
-- http://www.apache.org/licenses/LICENSE-2.0 | |
-- | |
-- Unless required by applicable law or agreed to in writing, software | |
-- distributed under the License is distributed on an "AS IS" BASIS, |
View PublisherVerificationJUnit.java
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/* | |
* Copyright Data Geekery GmbH | |
* | |
* Licensed under the Apache License, Version 2.0 (the "License"); | |
* you may not use this file except in compliance with the License. | |
* You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, software |
View JDBCSpeedTest.java
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package org.jooq.testscripts; | |
import java.sql.Connection; | |
import java.sql.PreparedStatement; | |
import java.sql.Statement; | |
import org.jooq.SQLDialect; | |
import org.jooq.test.setup.DatabaseSetup; | |
import org.jooq.test.setup.DatabaseSetup.Config; | |
import org.jooq.tools.StopWatch; |
View SimplifyThis.java
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List<MappedTable> mappedTables1() { | |
if (mappedTables == null) { | |
mappedTables = T_BOOK | |
.getSchema() | |
.getTables() | |
.stream() | |
.map(t -> { | |
Table<?> l = lookupTable(t.getName()); | |
return l == null ? null : new MappedTable().withInput(t.getName()).withOutput(l.getName()); | |
}) |
View TwoMains.java
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public class TwoMains { | |
public static void main(String[] args) { | |
System.out.println("main"); | |
mаin(args); | |
} | |
public static void mаin(String[] args) { | |
System.out.println("other mаin"); | |
} | |
} |
View ListSurprise.java
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import java.util.ArrayList; | |
import java.util.Collections; | |
import java.util.Iterator; | |
import java.util.List; | |
public class ListSurprise { | |
public static void mаin(String[] args) { | |
System.setSecurityManager(new SecurityManager()); | |
List<Integer> numbers = new ArrayList<>(); | |
Collections.addAll(numbers, 3, 1, 4, 1, 5, 5, 9); |
View gist:1bc2ea085a36d275b7e2df3f1ab1ce17
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import java.io.ByteArrayOutputStream; | |
import java.io.PrintStream; | |
import java.lang.reflect.Field; | |
import java.lang.reflect.Modifier; | |
import java.util.ArrayList; | |
import java.util.Collections; | |
import java.util.Iterator; | |
import java.util.List; | |
import sun.misc.Unsafe; |
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