From b327405212e1ff14524d454b97f9dd7aa02505ab Mon Sep 17 00:00:00 2001 From: KaranSinghG Date: Sat, 20 Jun 2026 10:44:24 +0530 Subject: [PATCH 1/7] Initialize spring boot --- .gitattributes | 2 + .gitignore | 33 ++ .mvn/wrapper/maven-wrapper.properties | 3 + mvnw | 295 ++++++++++++++++++ mvnw.cmd | 189 +++++++++++ pom.xml | 63 ++++ .../SqlOptimizationApplication.java | 13 + src/main/resources/application.yaml | 3 + .../SqlOptimizationApplicationTests.java | 13 + 9 files changed, 614 insertions(+) create mode 100644 .gitattributes create mode 100644 .gitignore create mode 100644 .mvn/wrapper/maven-wrapper.properties create mode 100644 mvnw create mode 100644 mvnw.cmd create mode 100644 pom.xml create mode 100644 src/main/java/com/demo/sqlOptimization/SqlOptimizationApplication.java create mode 100644 src/main/resources/application.yaml create mode 100644 src/test/java/com/demo/sqlOptimization/SqlOptimizationApplicationTests.java diff --git a/.gitattributes b/.gitattributes new file mode 100644 index 0000000..3b41682 --- /dev/null +++ b/.gitattributes @@ -0,0 +1,2 @@ +/mvnw text eol=lf +*.cmd text eol=crlf diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..667aaef --- /dev/null +++ b/.gitignore @@ -0,0 +1,33 @@ +HELP.md +target/ +.mvn/wrapper/maven-wrapper.jar +!**/src/main/**/target/ +!**/src/test/**/target/ + +### STS ### +.apt_generated +.classpath +.factorypath +.project +.settings +.springBeans +.sts4-cache + +### IntelliJ IDEA ### +.idea +*.iws +*.iml +*.ipr + +### NetBeans ### +/nbproject/private/ +/nbbuild/ +/dist/ +/nbdist/ +/.nb-gradle/ +build/ +!**/src/main/**/build/ +!**/src/test/**/build/ + +### VS Code ### +.vscode/ diff --git a/.mvn/wrapper/maven-wrapper.properties b/.mvn/wrapper/maven-wrapper.properties new file mode 100644 index 0000000..216df05 --- /dev/null +++ b/.mvn/wrapper/maven-wrapper.properties @@ -0,0 +1,3 @@ +wrapperVersion=3.3.4 +distributionType=only-script +distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.16/apache-maven-3.9.16-bin.zip diff --git a/mvnw b/mvnw new file mode 100644 index 0000000..bd8896b --- /dev/null +++ b/mvnw @@ -0,0 +1,295 @@ +#!/bin/sh +# ---------------------------------------------------------------------------- +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you 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, WITHOUT WARRANTIES OR CONDITIONS OF ANY +# KIND, either express or implied. See the License for the +# specific language governing permissions and limitations +# under the License. +# ---------------------------------------------------------------------------- + +# ---------------------------------------------------------------------------- +# Apache Maven Wrapper startup batch script, version 3.3.4 +# +# Optional ENV vars +# ----------------- +# JAVA_HOME - location of a JDK home dir, required when download maven via java source +# MVNW_REPOURL - repo url base for downloading maven distribution +# MVNW_USERNAME/MVNW_PASSWORD - user and password for downloading maven +# MVNW_VERBOSE - true: enable verbose log; debug: trace the mvnw script; others: silence the output +# ---------------------------------------------------------------------------- + +set -euf +[ "${MVNW_VERBOSE-}" != debug ] || set -x + +# OS specific support. +native_path() { printf %s\\n "$1"; } +case "$(uname)" in +CYGWIN* | MINGW*) + [ -z "${JAVA_HOME-}" ] || JAVA_HOME="$(cygpath --unix "$JAVA_HOME")" + native_path() { cygpath --path --windows "$1"; } + ;; +esac + +# set JAVACMD and JAVACCMD +set_java_home() { + # For Cygwin and MinGW, ensure paths are in Unix format before anything is touched + if [ -n "${JAVA_HOME-}" ]; then + if [ -x "$JAVA_HOME/jre/sh/java" ]; then + # IBM's JDK on AIX uses strange locations for the executables + JAVACMD="$JAVA_HOME/jre/sh/java" + JAVACCMD="$JAVA_HOME/jre/sh/javac" + else + JAVACMD="$JAVA_HOME/bin/java" + JAVACCMD="$JAVA_HOME/bin/javac" + + if [ ! -x "$JAVACMD" ] || [ ! -x "$JAVACCMD" ]; then + echo "The JAVA_HOME environment variable is not defined correctly, so mvnw cannot run." >&2 + echo "JAVA_HOME is set to \"$JAVA_HOME\", but \"\$JAVA_HOME/bin/java\" or \"\$JAVA_HOME/bin/javac\" does not exist." >&2 + return 1 + fi + fi + else + JAVACMD="$( + 'set' +e + 'unset' -f command 2>/dev/null + 'command' -v java + )" || : + JAVACCMD="$( + 'set' +e + 'unset' -f command 2>/dev/null + 'command' -v javac + )" || : + + if [ ! -x "${JAVACMD-}" ] || [ ! -x "${JAVACCMD-}" ]; then + echo "The java/javac command does not exist in PATH nor is JAVA_HOME set, so mvnw cannot run." >&2 + return 1 + fi + fi +} + +# hash string like Java String::hashCode +hash_string() { + str="${1:-}" h=0 + while [ -n "$str" ]; do + char="${str%"${str#?}"}" + h=$(((h * 31 + $(LC_CTYPE=C printf %d "'$char")) % 4294967296)) + str="${str#?}" + done + printf %x\\n $h +} + +verbose() { :; } +[ "${MVNW_VERBOSE-}" != true ] || verbose() { printf %s\\n "${1-}"; } + +die() { + printf %s\\n "$1" >&2 + exit 1 +} + +trim() { + # MWRAPPER-139: + # Trims trailing and leading whitespace, carriage returns, tabs, and linefeeds. + # Needed for removing poorly interpreted newline sequences when running in more + # exotic environments such as mingw bash on Windows. + printf "%s" "${1}" | tr -d '[:space:]' +} + +scriptDir="$(dirname "$0")" +scriptName="$(basename "$0")" + +# parse distributionUrl and optional distributionSha256Sum, requires .mvn/wrapper/maven-wrapper.properties +while IFS="=" read -r key value; do + case "${key-}" in + distributionUrl) distributionUrl=$(trim "${value-}") ;; + distributionSha256Sum) distributionSha256Sum=$(trim "${value-}") ;; + esac +done <"$scriptDir/.mvn/wrapper/maven-wrapper.properties" +[ -n "${distributionUrl-}" ] || die "cannot read distributionUrl property in $scriptDir/.mvn/wrapper/maven-wrapper.properties" + +case "${distributionUrl##*/}" in +maven-mvnd-*bin.*) + MVN_CMD=mvnd.sh _MVNW_REPO_PATTERN=/maven/mvnd/ + case "${PROCESSOR_ARCHITECTURE-}${PROCESSOR_ARCHITEW6432-}:$(uname -a)" in + *AMD64:CYGWIN* | *AMD64:MINGW*) distributionPlatform=windows-amd64 ;; + :Darwin*x86_64) distributionPlatform=darwin-amd64 ;; + :Darwin*arm64) distributionPlatform=darwin-aarch64 ;; + :Linux*x86_64*) distributionPlatform=linux-amd64 ;; + *) + echo "Cannot detect native platform for mvnd on $(uname)-$(uname -m), use pure java version" >&2 + distributionPlatform=linux-amd64 + ;; + esac + distributionUrl="${distributionUrl%-bin.*}-$distributionPlatform.zip" + ;; +maven-mvnd-*) MVN_CMD=mvnd.sh _MVNW_REPO_PATTERN=/maven/mvnd/ ;; +*) MVN_CMD="mvn${scriptName#mvnw}" _MVNW_REPO_PATTERN=/org/apache/maven/ ;; +esac + +# apply MVNW_REPOURL and calculate MAVEN_HOME +# maven home pattern: ~/.m2/wrapper/dists/{apache-maven-,maven-mvnd--}/ +[ -z "${MVNW_REPOURL-}" ] || distributionUrl="$MVNW_REPOURL$_MVNW_REPO_PATTERN${distributionUrl#*"$_MVNW_REPO_PATTERN"}" +distributionUrlName="${distributionUrl##*/}" +distributionUrlNameMain="${distributionUrlName%.*}" +distributionUrlNameMain="${distributionUrlNameMain%-bin}" +MAVEN_USER_HOME="${MAVEN_USER_HOME:-${HOME}/.m2}" +MAVEN_HOME="${MAVEN_USER_HOME}/wrapper/dists/${distributionUrlNameMain-}/$(hash_string "$distributionUrl")" + +exec_maven() { + unset MVNW_VERBOSE MVNW_USERNAME MVNW_PASSWORD MVNW_REPOURL || : + exec "$MAVEN_HOME/bin/$MVN_CMD" "$@" || die "cannot exec $MAVEN_HOME/bin/$MVN_CMD" +} + +if [ -d "$MAVEN_HOME" ]; then + verbose "found existing MAVEN_HOME at $MAVEN_HOME" + exec_maven "$@" +fi + +case "${distributionUrl-}" in +*?-bin.zip | *?maven-mvnd-?*-?*.zip) ;; +*) die "distributionUrl is not valid, must match *-bin.zip or maven-mvnd-*.zip, but found '${distributionUrl-}'" ;; +esac + +# prepare tmp dir +if TMP_DOWNLOAD_DIR="$(mktemp -d)" && [ -d "$TMP_DOWNLOAD_DIR" ]; then + clean() { rm -rf -- "$TMP_DOWNLOAD_DIR"; } + trap clean HUP INT TERM EXIT +else + die "cannot create temp dir" +fi + +mkdir -p -- "${MAVEN_HOME%/*}" + +# Download and Install Apache Maven +verbose "Couldn't find MAVEN_HOME, downloading and installing it ..." +verbose "Downloading from: $distributionUrl" +verbose "Downloading to: $TMP_DOWNLOAD_DIR/$distributionUrlName" + +# select .zip or .tar.gz +if ! command -v unzip >/dev/null; then + distributionUrl="${distributionUrl%.zip}.tar.gz" + distributionUrlName="${distributionUrl##*/}" +fi + +# verbose opt +__MVNW_QUIET_WGET=--quiet __MVNW_QUIET_CURL=--silent __MVNW_QUIET_UNZIP=-q __MVNW_QUIET_TAR='' +[ "${MVNW_VERBOSE-}" != true ] || __MVNW_QUIET_WGET='' __MVNW_QUIET_CURL='' __MVNW_QUIET_UNZIP='' __MVNW_QUIET_TAR=v + +# normalize http auth +case "${MVNW_PASSWORD:+has-password}" in +'') MVNW_USERNAME='' MVNW_PASSWORD='' ;; +has-password) [ -n "${MVNW_USERNAME-}" ] || MVNW_USERNAME='' MVNW_PASSWORD='' ;; +esac + +if [ -z "${MVNW_USERNAME-}" ] && command -v wget >/dev/null; then + verbose "Found wget ... using wget" + wget ${__MVNW_QUIET_WGET:+"$__MVNW_QUIET_WGET"} "$distributionUrl" -O "$TMP_DOWNLOAD_DIR/$distributionUrlName" || die "wget: Failed to fetch $distributionUrl" +elif [ -z "${MVNW_USERNAME-}" ] && command -v curl >/dev/null; then + verbose "Found curl ... using curl" + curl ${__MVNW_QUIET_CURL:+"$__MVNW_QUIET_CURL"} -f -L -o "$TMP_DOWNLOAD_DIR/$distributionUrlName" "$distributionUrl" || die "curl: Failed to fetch $distributionUrl" +elif set_java_home; then + verbose "Falling back to use Java to download" + javaSource="$TMP_DOWNLOAD_DIR/Downloader.java" + targetZip="$TMP_DOWNLOAD_DIR/$distributionUrlName" + cat >"$javaSource" <<-END + public class Downloader extends java.net.Authenticator + { + protected java.net.PasswordAuthentication getPasswordAuthentication() + { + return new java.net.PasswordAuthentication( System.getenv( "MVNW_USERNAME" ), System.getenv( "MVNW_PASSWORD" ).toCharArray() ); + } + public static void main( String[] args ) throws Exception + { + setDefault( new Downloader() ); + java.nio.file.Files.copy( java.net.URI.create( args[0] ).toURL().openStream(), java.nio.file.Paths.get( args[1] ).toAbsolutePath().normalize() ); + } + } + END + # For Cygwin/MinGW, switch paths to Windows format before running javac and java + verbose " - Compiling Downloader.java ..." + "$(native_path "$JAVACCMD")" "$(native_path "$javaSource")" || die "Failed to compile Downloader.java" + verbose " - Running Downloader.java ..." + "$(native_path "$JAVACMD")" -cp "$(native_path "$TMP_DOWNLOAD_DIR")" Downloader "$distributionUrl" "$(native_path "$targetZip")" +fi + +# If specified, validate the SHA-256 sum of the Maven distribution zip file +if [ -n "${distributionSha256Sum-}" ]; then + distributionSha256Result=false + if [ "$MVN_CMD" = mvnd.sh ]; then + echo "Checksum validation is not supported for maven-mvnd." >&2 + echo "Please disable validation by removing 'distributionSha256Sum' from your maven-wrapper.properties." >&2 + exit 1 + elif command -v sha256sum >/dev/null; then + if echo "$distributionSha256Sum $TMP_DOWNLOAD_DIR/$distributionUrlName" | sha256sum -c - >/dev/null 2>&1; then + distributionSha256Result=true + fi + elif command -v shasum >/dev/null; then + if echo "$distributionSha256Sum $TMP_DOWNLOAD_DIR/$distributionUrlName" | shasum -a 256 -c >/dev/null 2>&1; then + distributionSha256Result=true + fi + else + echo "Checksum validation was requested but neither 'sha256sum' or 'shasum' are available." >&2 + echo "Please install either command, or disable validation by removing 'distributionSha256Sum' from your maven-wrapper.properties." >&2 + exit 1 + fi + if [ $distributionSha256Result = false ]; then + echo "Error: Failed to validate Maven distribution SHA-256, your Maven distribution might be compromised." >&2 + echo "If you updated your Maven version, you need to update the specified distributionSha256Sum property." >&2 + exit 1 + fi +fi + +# unzip and move +if command -v unzip >/dev/null; then + unzip ${__MVNW_QUIET_UNZIP:+"$__MVNW_QUIET_UNZIP"} "$TMP_DOWNLOAD_DIR/$distributionUrlName" -d "$TMP_DOWNLOAD_DIR" || die "failed to unzip" +else + tar xzf${__MVNW_QUIET_TAR:+"$__MVNW_QUIET_TAR"} "$TMP_DOWNLOAD_DIR/$distributionUrlName" -C "$TMP_DOWNLOAD_DIR" || die "failed to untar" +fi + +# Find the actual extracted directory name (handles snapshots where filename != directory name) +actualDistributionDir="" + +# First try the expected directory name (for regular distributions) +if [ -d "$TMP_DOWNLOAD_DIR/$distributionUrlNameMain" ]; then + if [ -f "$TMP_DOWNLOAD_DIR/$distributionUrlNameMain/bin/$MVN_CMD" ]; then + actualDistributionDir="$distributionUrlNameMain" + fi +fi + +# If not found, search for any directory with the Maven executable (for snapshots) +if [ -z "$actualDistributionDir" ]; then + # enable globbing to iterate over items + set +f + for dir in "$TMP_DOWNLOAD_DIR"/*; do + if [ -d "$dir" ]; then + if [ -f "$dir/bin/$MVN_CMD" ]; then + actualDistributionDir="$(basename "$dir")" + break + fi + fi + done + set -f +fi + +if [ -z "$actualDistributionDir" ]; then + verbose "Contents of $TMP_DOWNLOAD_DIR:" + verbose "$(ls -la "$TMP_DOWNLOAD_DIR")" + die "Could not find Maven distribution directory in extracted archive" +fi + +verbose "Found extracted Maven distribution directory: $actualDistributionDir" +printf %s\\n "$distributionUrl" >"$TMP_DOWNLOAD_DIR/$actualDistributionDir/mvnw.url" +mv -- "$TMP_DOWNLOAD_DIR/$actualDistributionDir" "$MAVEN_HOME" || [ -d "$MAVEN_HOME" ] || die "fail to move MAVEN_HOME" + +clean || : +exec_maven "$@" diff --git a/mvnw.cmd b/mvnw.cmd new file mode 100644 index 0000000..92450f9 --- /dev/null +++ b/mvnw.cmd @@ -0,0 +1,189 @@ +<# : batch portion +@REM ---------------------------------------------------------------------------- +@REM Licensed to the Apache Software Foundation (ASF) under one +@REM or more contributor license agreements. See the NOTICE file +@REM distributed with this work for additional information +@REM regarding copyright ownership. The ASF licenses this file +@REM to you under the Apache License, Version 2.0 (the +@REM "License"); you may not use this file except in compliance +@REM with the License. You may obtain a copy of the License at +@REM +@REM http://www.apache.org/licenses/LICENSE-2.0 +@REM +@REM Unless required by applicable law or agreed to in writing, +@REM software distributed under the License is distributed on an +@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +@REM KIND, either express or implied. See the License for the +@REM specific language governing permissions and limitations +@REM under the License. +@REM ---------------------------------------------------------------------------- + +@REM ---------------------------------------------------------------------------- +@REM Apache Maven Wrapper startup batch script, version 3.3.4 +@REM +@REM Optional ENV vars +@REM MVNW_REPOURL - repo url base for downloading maven distribution +@REM MVNW_USERNAME/MVNW_PASSWORD - user and password for downloading maven +@REM MVNW_VERBOSE - true: enable verbose log; others: silence the output +@REM ---------------------------------------------------------------------------- + +@IF "%__MVNW_ARG0_NAME__%"=="" (SET __MVNW_ARG0_NAME__=%~nx0) +@SET __MVNW_CMD__= +@SET __MVNW_ERROR__= +@SET __MVNW_PSMODULEP_SAVE=%PSModulePath% +@SET PSModulePath= +@FOR /F "usebackq tokens=1* delims==" %%A IN (`powershell -noprofile "& {$scriptDir='%~dp0'; $script='%__MVNW_ARG0_NAME__%'; icm -ScriptBlock ([Scriptblock]::Create((Get-Content -Raw '%~f0'))) -NoNewScope}"`) DO @( + IF "%%A"=="MVN_CMD" (set __MVNW_CMD__=%%B) ELSE IF "%%B"=="" (echo %%A) ELSE (echo %%A=%%B) +) +@SET PSModulePath=%__MVNW_PSMODULEP_SAVE% +@SET __MVNW_PSMODULEP_SAVE= +@SET __MVNW_ARG0_NAME__= +@SET MVNW_USERNAME= +@SET MVNW_PASSWORD= +@IF NOT "%__MVNW_CMD__%"=="" ("%__MVNW_CMD__%" %*) +@echo Cannot start maven from wrapper >&2 && exit /b 1 +@GOTO :EOF +: end batch / begin powershell #> + +$ErrorActionPreference = "Stop" +if ($env:MVNW_VERBOSE -eq "true") { + $VerbosePreference = "Continue" +} + +# calculate distributionUrl, requires .mvn/wrapper/maven-wrapper.properties +$distributionUrl = (Get-Content -Raw "$scriptDir/.mvn/wrapper/maven-wrapper.properties" | ConvertFrom-StringData).distributionUrl +if (!$distributionUrl) { + Write-Error "cannot read distributionUrl property in $scriptDir/.mvn/wrapper/maven-wrapper.properties" +} + +switch -wildcard -casesensitive ( $($distributionUrl -replace '^.*/','') ) { + "maven-mvnd-*" { + $USE_MVND = $true + $distributionUrl = $distributionUrl -replace '-bin\.[^.]*$',"-windows-amd64.zip" + $MVN_CMD = "mvnd.cmd" + break + } + default { + $USE_MVND = $false + $MVN_CMD = $script -replace '^mvnw','mvn' + break + } +} + +# apply MVNW_REPOURL and calculate MAVEN_HOME +# maven home pattern: ~/.m2/wrapper/dists/{apache-maven-,maven-mvnd--}/ +if ($env:MVNW_REPOURL) { + $MVNW_REPO_PATTERN = if ($USE_MVND -eq $False) { "/org/apache/maven/" } else { "/maven/mvnd/" } + $distributionUrl = "$env:MVNW_REPOURL$MVNW_REPO_PATTERN$($distributionUrl -replace "^.*$MVNW_REPO_PATTERN",'')" +} +$distributionUrlName = $distributionUrl -replace '^.*/','' +$distributionUrlNameMain = $distributionUrlName -replace '\.[^.]*$','' -replace '-bin$','' + +$MAVEN_M2_PATH = "$HOME/.m2" +if ($env:MAVEN_USER_HOME) { + $MAVEN_M2_PATH = "$env:MAVEN_USER_HOME" +} + +if (-not (Test-Path -Path $MAVEN_M2_PATH)) { + New-Item -Path $MAVEN_M2_PATH -ItemType Directory | Out-Null +} + +$MAVEN_WRAPPER_DISTS = $null +if ((Get-Item $MAVEN_M2_PATH).Target[0] -eq $null) { + $MAVEN_WRAPPER_DISTS = "$MAVEN_M2_PATH/wrapper/dists" +} else { + $MAVEN_WRAPPER_DISTS = (Get-Item $MAVEN_M2_PATH).Target[0] + "/wrapper/dists" +} + +$MAVEN_HOME_PARENT = "$MAVEN_WRAPPER_DISTS/$distributionUrlNameMain" +$MAVEN_HOME_NAME = ([System.Security.Cryptography.SHA256]::Create().ComputeHash([byte[]][char[]]$distributionUrl) | ForEach-Object {$_.ToString("x2")}) -join '' +$MAVEN_HOME = "$MAVEN_HOME_PARENT/$MAVEN_HOME_NAME" + +if (Test-Path -Path "$MAVEN_HOME" -PathType Container) { + Write-Verbose "found existing MAVEN_HOME at $MAVEN_HOME" + Write-Output "MVN_CMD=$MAVEN_HOME/bin/$MVN_CMD" + exit $? +} + +if (! $distributionUrlNameMain -or ($distributionUrlName -eq $distributionUrlNameMain)) { + Write-Error "distributionUrl is not valid, must end with *-bin.zip, but found $distributionUrl" +} + +# prepare tmp dir +$TMP_DOWNLOAD_DIR_HOLDER = New-TemporaryFile +$TMP_DOWNLOAD_DIR = New-Item -Itemtype Directory -Path "$TMP_DOWNLOAD_DIR_HOLDER.dir" +$TMP_DOWNLOAD_DIR_HOLDER.Delete() | Out-Null +trap { + if ($TMP_DOWNLOAD_DIR.Exists) { + try { Remove-Item $TMP_DOWNLOAD_DIR -Recurse -Force | Out-Null } + catch { Write-Warning "Cannot remove $TMP_DOWNLOAD_DIR" } + } +} + +New-Item -Itemtype Directory -Path "$MAVEN_HOME_PARENT" -Force | Out-Null + +# Download and Install Apache Maven +Write-Verbose "Couldn't find MAVEN_HOME, downloading and installing it ..." +Write-Verbose "Downloading from: $distributionUrl" +Write-Verbose "Downloading to: $TMP_DOWNLOAD_DIR/$distributionUrlName" + +$webclient = New-Object System.Net.WebClient +if ($env:MVNW_USERNAME -and $env:MVNW_PASSWORD) { + $webclient.Credentials = New-Object System.Net.NetworkCredential($env:MVNW_USERNAME, $env:MVNW_PASSWORD) +} +[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12 +$webclient.DownloadFile($distributionUrl, "$TMP_DOWNLOAD_DIR/$distributionUrlName") | Out-Null + +# If specified, validate the SHA-256 sum of the Maven distribution zip file +$distributionSha256Sum = (Get-Content -Raw "$scriptDir/.mvn/wrapper/maven-wrapper.properties" | ConvertFrom-StringData).distributionSha256Sum +if ($distributionSha256Sum) { + if ($USE_MVND) { + Write-Error "Checksum validation is not supported for maven-mvnd. `nPlease disable validation by removing 'distributionSha256Sum' from your maven-wrapper.properties." + } + Import-Module $PSHOME\Modules\Microsoft.PowerShell.Utility -Function Get-FileHash + if ((Get-FileHash "$TMP_DOWNLOAD_DIR/$distributionUrlName" -Algorithm SHA256).Hash.ToLower() -ne $distributionSha256Sum) { + Write-Error "Error: Failed to validate Maven distribution SHA-256, your Maven distribution might be compromised. If you updated your Maven version, you need to update the specified distributionSha256Sum property." + } +} + +# unzip and move +Expand-Archive "$TMP_DOWNLOAD_DIR/$distributionUrlName" -DestinationPath "$TMP_DOWNLOAD_DIR" | Out-Null + +# Find the actual extracted directory name (handles snapshots where filename != directory name) +$actualDistributionDir = "" + +# First try the expected directory name (for regular distributions) +$expectedPath = Join-Path "$TMP_DOWNLOAD_DIR" "$distributionUrlNameMain" +$expectedMvnPath = Join-Path "$expectedPath" "bin/$MVN_CMD" +if ((Test-Path -Path $expectedPath -PathType Container) -and (Test-Path -Path $expectedMvnPath -PathType Leaf)) { + $actualDistributionDir = $distributionUrlNameMain +} + +# If not found, search for any directory with the Maven executable (for snapshots) +if (!$actualDistributionDir) { + Get-ChildItem -Path "$TMP_DOWNLOAD_DIR" -Directory | ForEach-Object { + $testPath = Join-Path $_.FullName "bin/$MVN_CMD" + if (Test-Path -Path $testPath -PathType Leaf) { + $actualDistributionDir = $_.Name + } + } +} + +if (!$actualDistributionDir) { + Write-Error "Could not find Maven distribution directory in extracted archive" +} + +Write-Verbose "Found extracted Maven distribution directory: $actualDistributionDir" +Rename-Item -Path "$TMP_DOWNLOAD_DIR/$actualDistributionDir" -NewName $MAVEN_HOME_NAME | Out-Null +try { + Move-Item -Path "$TMP_DOWNLOAD_DIR/$MAVEN_HOME_NAME" -Destination $MAVEN_HOME_PARENT | Out-Null +} catch { + if (! (Test-Path -Path "$MAVEN_HOME" -PathType Container)) { + Write-Error "fail to move MAVEN_HOME" + } +} finally { + try { Remove-Item $TMP_DOWNLOAD_DIR -Recurse -Force | Out-Null } + catch { Write-Warning "Cannot remove $TMP_DOWNLOAD_DIR" } +} + +Write-Output "MVN_CMD=$MAVEN_HOME/bin/$MVN_CMD" diff --git a/pom.xml b/pom.xml new file mode 100644 index 0000000..a805fc6 --- /dev/null +++ b/pom.xml @@ -0,0 +1,63 @@ + + + 4.0.0 + + org.springframework.boot + spring-boot-starter-parent + 4.1.0 + + + com.demo + sqlOptimization + 0.0.1-SNAPSHOT + + + + + + + + + + + + + + + + + 21 + + + + org.springframework.boot + spring-boot-h2console + + + org.springframework.boot + spring-boot-starter + + + + com.h2database + h2 + runtime + + + org.springframework.boot + spring-boot-starter-test + test + + + + + + + org.springframework.boot + spring-boot-maven-plugin + + + + + diff --git a/src/main/java/com/demo/sqlOptimization/SqlOptimizationApplication.java b/src/main/java/com/demo/sqlOptimization/SqlOptimizationApplication.java new file mode 100644 index 0000000..f77c299 --- /dev/null +++ b/src/main/java/com/demo/sqlOptimization/SqlOptimizationApplication.java @@ -0,0 +1,13 @@ +package com.demo.sqlOptimization; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; + +@SpringBootApplication +public class SqlOptimizationApplication { + + public static void main(String[] args) { + SpringApplication.run(SqlOptimizationApplication.class, args); + } + +} diff --git a/src/main/resources/application.yaml b/src/main/resources/application.yaml new file mode 100644 index 0000000..f5f11bd --- /dev/null +++ b/src/main/resources/application.yaml @@ -0,0 +1,3 @@ +spring: + application: + name: sqlOptimization diff --git a/src/test/java/com/demo/sqlOptimization/SqlOptimizationApplicationTests.java b/src/test/java/com/demo/sqlOptimization/SqlOptimizationApplicationTests.java new file mode 100644 index 0000000..831fcc0 --- /dev/null +++ b/src/test/java/com/demo/sqlOptimization/SqlOptimizationApplicationTests.java @@ -0,0 +1,13 @@ +package com.demo.sqlOptimization; + +import org.junit.jupiter.api.Test; +import org.springframework.boot.test.context.SpringBootTest; + +@SpringBootTest +class SqlOptimizationApplicationTests { + + @Test + void contextLoads() { + } + +} From 9501d5c5319f97dc633b5aabbf2f9e1ff6a592c4 Mon Sep 17 00:00:00 2001 From: KaranSinghG Date: Sat, 20 Jun 2026 11:04:50 +0530 Subject: [PATCH 2/7] Create entities --- .gitignore | 25 ----------- pom.xml | 8 ++++ .../sqlOptimization/entities/Customer.java | 37 ++++++++++++++++ .../demo/sqlOptimization/entities/Order.java | 44 +++++++++++++++++++ 4 files changed, 89 insertions(+), 25 deletions(-) create mode 100644 src/main/java/com/demo/sqlOptimization/entities/Customer.java create mode 100644 src/main/java/com/demo/sqlOptimization/entities/Order.java diff --git a/.gitignore b/.gitignore index 667aaef..bf2ff19 100644 --- a/.gitignore +++ b/.gitignore @@ -4,30 +4,5 @@ target/ !**/src/main/**/target/ !**/src/test/**/target/ -### STS ### -.apt_generated -.classpath -.factorypath -.project -.settings -.springBeans -.sts4-cache - -### IntelliJ IDEA ### -.idea -*.iws -*.iml -*.ipr - -### NetBeans ### -/nbproject/private/ -/nbbuild/ -/dist/ -/nbdist/ -/.nb-gradle/ -build/ -!**/src/main/**/build/ -!**/src/test/**/build/ - ### VS Code ### .vscode/ diff --git a/pom.xml b/pom.xml index a805fc6..0050621 100644 --- a/pom.xml +++ b/pom.xml @@ -38,6 +38,14 @@ org.springframework.boot spring-boot-starter + + org.springframework.boot + spring-boot-starter-web + + + org.springframework.boot + spring-boot-starter-data-jpa + com.h2database diff --git a/src/main/java/com/demo/sqlOptimization/entities/Customer.java b/src/main/java/com/demo/sqlOptimization/entities/Customer.java new file mode 100644 index 0000000..e79f449 --- /dev/null +++ b/src/main/java/com/demo/sqlOptimization/entities/Customer.java @@ -0,0 +1,37 @@ +package com.demo.sqlOptimization.entities; + +import java.util.List; + +import jakarta.persistence.Column; +import jakarta.persistence.Entity; +import jakarta.persistence.Id; +import jakarta.persistence.OneToMany; +import jakarta.persistence.Table; + +@Entity +@Table(name = "customers") +public class Customer { + + @Id + Long id; + @Column(name = "name", nullable = false) + String name; + @OneToMany(mappedBy = "customer_id") + List orders; + + public Customer() { + } + + public Customer(Long id, String name) { + this.id = id; + this.name = name; + } + + public Long getId() { + return id; + } + + public String getName() { + return name; + } +} diff --git a/src/main/java/com/demo/sqlOptimization/entities/Order.java b/src/main/java/com/demo/sqlOptimization/entities/Order.java new file mode 100644 index 0000000..a035eb2 --- /dev/null +++ b/src/main/java/com/demo/sqlOptimization/entities/Order.java @@ -0,0 +1,44 @@ +package com.demo.sqlOptimization.entities; + +import jakarta.persistence.Column; +import jakarta.persistence.Entity; +import jakarta.persistence.GeneratedValue; +import jakarta.persistence.GenerationType; +import jakarta.persistence.Id; +import jakarta.persistence.ManyToOne; +import jakarta.persistence.Table; + +@Entity +@Table(name = "orders") +public class Order { + + @Id + @GeneratedValue(strategy = GenerationType.IDENTITY) + Long id; + @Column(name = "description", nullable = false) + String description; + @ManyToOne + @Column(name = "customer_id", nullable = false) + Long customerId; + + public Order() { + } + + public Order(String description, Long customerId) { + this.description = description; + this.customerId = customerId; + } + + public Long getId() { + return id; + } + + public String getDescription() { + return description; + } + + public Long getCustomerId() { + return customerId; + } + +} From 2d086ebc819d3418a493fd54cef99703e07168ee Mon Sep 17 00:00:00 2001 From: KaranSinghG Date: Sat, 20 Jun 2026 11:20:26 +0530 Subject: [PATCH 3/7] Refactor Customer and Order entities for proper relationship mapping; add OrderRepository for fetching orders with customers --- .../demo/sqlOptimization/entities/Customer.java | 2 +- .../com/demo/sqlOptimization/entities/Order.java | 13 +++++++------ .../repository/OrderRepository.java | 14 ++++++++++++++ 3 files changed, 22 insertions(+), 7 deletions(-) create mode 100644 src/main/java/com/demo/sqlOptimization/repository/OrderRepository.java diff --git a/src/main/java/com/demo/sqlOptimization/entities/Customer.java b/src/main/java/com/demo/sqlOptimization/entities/Customer.java index e79f449..a845096 100644 --- a/src/main/java/com/demo/sqlOptimization/entities/Customer.java +++ b/src/main/java/com/demo/sqlOptimization/entities/Customer.java @@ -16,7 +16,7 @@ public class Customer { Long id; @Column(name = "name", nullable = false) String name; - @OneToMany(mappedBy = "customer_id") + @OneToMany(mappedBy = "customer") List orders; public Customer() { diff --git a/src/main/java/com/demo/sqlOptimization/entities/Order.java b/src/main/java/com/demo/sqlOptimization/entities/Order.java index a035eb2..5767227 100644 --- a/src/main/java/com/demo/sqlOptimization/entities/Order.java +++ b/src/main/java/com/demo/sqlOptimization/entities/Order.java @@ -5,6 +5,7 @@ import jakarta.persistence.GeneratedValue; import jakarta.persistence.GenerationType; import jakarta.persistence.Id; +import jakarta.persistence.JoinColumn; import jakarta.persistence.ManyToOne; import jakarta.persistence.Table; @@ -18,15 +19,15 @@ public class Order { @Column(name = "description", nullable = false) String description; @ManyToOne - @Column(name = "customer_id", nullable = false) - Long customerId; + @JoinColumn(name = "customer_id", nullable = false) + Customer customer; public Order() { } - public Order(String description, Long customerId) { + public Order(String description, Customer customer) { this.description = description; - this.customerId = customerId; + this.customer = customer; } public Long getId() { @@ -37,8 +38,8 @@ public String getDescription() { return description; } - public Long getCustomerId() { - return customerId; + public Customer getCustomer() { + return customer; } } diff --git a/src/main/java/com/demo/sqlOptimization/repository/OrderRepository.java b/src/main/java/com/demo/sqlOptimization/repository/OrderRepository.java new file mode 100644 index 0000000..a017097 --- /dev/null +++ b/src/main/java/com/demo/sqlOptimization/repository/OrderRepository.java @@ -0,0 +1,14 @@ +package com.demo.sqlOptimization.repository; + +import java.util.List; + +import org.springframework.data.jpa.repository.JpaRepository; +import org.springframework.data.jpa.repository.Query; + +import com.demo.sqlOptimization.entities.Order; + +public interface OrderRepository extends JpaRepository { + + @Query("SELECT o FROM Order o JOIN FETCH o.customer") + List findAllWithCustomer(); +} From f61486a70b8ed698827aea0e5776e6d7484a1113 Mon Sep 17 00:00:00 2001 From: KaranSinghG Date: Sat, 20 Jun 2026 11:28:08 +0530 Subject: [PATCH 4/7] Add OrderController to handle order-related requests and fetch orders with customers --- .../controller/OrderController.java | 33 +++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 src/main/java/com/demo/sqlOptimization/controller/OrderController.java diff --git a/src/main/java/com/demo/sqlOptimization/controller/OrderController.java b/src/main/java/com/demo/sqlOptimization/controller/OrderController.java new file mode 100644 index 0000000..efec021 --- /dev/null +++ b/src/main/java/com/demo/sqlOptimization/controller/OrderController.java @@ -0,0 +1,33 @@ +package com.demo.sqlOptimization.controller; + +import org.springframework.web.bind.annotation.RequestMapping; +import org.springframework.web.bind.annotation.RestController; + +import com.demo.sqlOptimization.entities.Order; +import com.demo.sqlOptimization.repository.OrderRepository; + +import java.util.List; + +import org.springframework.web.bind.annotation.GetMapping; + + +@RestController +@RequestMapping("/orders") +public class OrderController { + + private OrderRepository orderRepository; + + public OrderController(OrderRepository orderRepository) { + this.orderRepository = orderRepository; + } + + @GetMapping("/test") + public String test() { + return "Working"; + } + + @GetMapping("/all") + public List getAllOrders() { + return orderRepository.findAllWithCustomer(); + } +} From 56c8b3036edabe4efd6596543b33713bd738072b Mon Sep 17 00:00:00 2001 From: KaranSinghG Date: Sat, 20 Jun 2026 11:34:17 +0530 Subject: [PATCH 5/7] query change to keep it basic --- src/main/java/com/demo/sqlOptimization/entities/Customer.java | 4 ++++ .../com/demo/sqlOptimization/repository/OrderRepository.java | 2 +- 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/src/main/java/com/demo/sqlOptimization/entities/Customer.java b/src/main/java/com/demo/sqlOptimization/entities/Customer.java index a845096..e4cc77e 100644 --- a/src/main/java/com/demo/sqlOptimization/entities/Customer.java +++ b/src/main/java/com/demo/sqlOptimization/entities/Customer.java @@ -34,4 +34,8 @@ public Long getId() { public String getName() { return name; } + + public List getOrders() { + return orders; + } } diff --git a/src/main/java/com/demo/sqlOptimization/repository/OrderRepository.java b/src/main/java/com/demo/sqlOptimization/repository/OrderRepository.java index a017097..6b5d59a 100644 --- a/src/main/java/com/demo/sqlOptimization/repository/OrderRepository.java +++ b/src/main/java/com/demo/sqlOptimization/repository/OrderRepository.java @@ -9,6 +9,6 @@ public interface OrderRepository extends JpaRepository { - @Query("SELECT o FROM Order o JOIN FETCH o.customer") + @Query("SELECT o FROM Order o JOIN o.customer") List findAllWithCustomer(); } From 726c3434fe177194eba25f380ac4d63d5bbfe75e Mon Sep 17 00:00:00 2001 From: KaranSinghG Date: Sat, 20 Jun 2026 13:05:37 +0530 Subject: [PATCH 6/7] Enhance database structure and performance: - Update README with performance baselines for small and large datasets - Refactor OrderController to log query execution time - Modify Customer entity to include ID generation strategy - Remove unnecessary query method from OrderRepository - Add SeedDataCreator for populating initial data - Create CustomerRepository for customer data management --- README.md | 12 ++++-- .../demo/sqlOptimization/SeedDataCreator.java | 43 +++++++++++++++++++ .../controller/OrderController.java | 6 ++- .../sqlOptimization/entities/Customer.java | 6 ++- .../demo/sqlOptimization/entities/Order.java | 3 ++ .../repository/CustomerRepository.java | 9 ++++ .../repository/OrderRepository.java | 5 --- 7 files changed, 73 insertions(+), 11 deletions(-) create mode 100644 src/main/java/com/demo/sqlOptimization/SeedDataCreator.java create mode 100644 src/main/java/com/demo/sqlOptimization/repository/CustomerRepository.java diff --git a/README.md b/README.md index 1c39fd1..ad06766 100644 --- a/README.md +++ b/README.md @@ -3,8 +3,14 @@ A practical deep-dive into identifying and resolving database bottlenecks, specifically the N+1 query problem and missing indexes in Spring Data JPA. -## 📊 Performance Baseline (Unoptimized) +## 📊 Performance Baseline (Unoptimized-Data-small) - **Data Volume:** 1,000 Customers, 20,000 Orders -- **Endpoint:** `/api/customers/report` +- **Endpoint:** `/api/orders/all` - **Total DB Queries Executed:** 1,001 -- **Average Response Time:** +- **Average Response Time:** 83 ms (10 calls) + +## 📊 Performance Baseline (Unoptimized-Data-large) +- **Data Volume:** 10,000 Customers, 2000,000 Orders +- **Endpoint:** `/api/orders/all` +- **Total DB Queries Executed:** 1,001 +- **Average Response Time:** 7.06 s (10 calls) diff --git a/src/main/java/com/demo/sqlOptimization/SeedDataCreator.java b/src/main/java/com/demo/sqlOptimization/SeedDataCreator.java new file mode 100644 index 0000000..1ef0bbd --- /dev/null +++ b/src/main/java/com/demo/sqlOptimization/SeedDataCreator.java @@ -0,0 +1,43 @@ +package com.demo.sqlOptimization; + +import org.springframework.boot.CommandLineRunner; +import org.springframework.stereotype.Component; + +import com.demo.sqlOptimization.entities.Customer; +import com.demo.sqlOptimization.entities.Order; +import com.demo.sqlOptimization.repository.CustomerRepository; +import com.demo.sqlOptimization.repository.OrderRepository; + + +import jakarta.transaction.Transactional; + +@Component +public class SeedDataCreator implements CommandLineRunner { + + private final CustomerRepository customerRepository; + private final OrderRepository orderRepository; + + public SeedDataCreator(CustomerRepository customerRepository, OrderRepository orderRepository) { + this.customerRepository = customerRepository; + this.orderRepository = orderRepository; + } + + @Override + @Transactional + public void run(String... args) throws Exception { + if(customerRepository.count()>0) { + return; + } + for (int i = 1; i <= 1000; i++) { + Customer customer = new Customer("Customer " + i); + customerRepository.save(customer); + for (int j = 1; j <= 20; j++) { + Order order = new Order("Order " + j + " for Customer " + i, customer); + orderRepository.save(order); + } + System.out.println("Created customer " + i); + } + + } + +} diff --git a/src/main/java/com/demo/sqlOptimization/controller/OrderController.java b/src/main/java/com/demo/sqlOptimization/controller/OrderController.java index efec021..eb22403 100644 --- a/src/main/java/com/demo/sqlOptimization/controller/OrderController.java +++ b/src/main/java/com/demo/sqlOptimization/controller/OrderController.java @@ -28,6 +28,10 @@ public String test() { @GetMapping("/all") public List getAllOrders() { - return orderRepository.findAllWithCustomer(); + Long t1 = System.currentTimeMillis(); + List orders = orderRepository.findAll(); + Long t2 = System.currentTimeMillis(); + System.out.println("Time taken by findAll(): " + (t2 - t1) + " ms"); + return orders; } } diff --git a/src/main/java/com/demo/sqlOptimization/entities/Customer.java b/src/main/java/com/demo/sqlOptimization/entities/Customer.java index e4cc77e..2e67dd3 100644 --- a/src/main/java/com/demo/sqlOptimization/entities/Customer.java +++ b/src/main/java/com/demo/sqlOptimization/entities/Customer.java @@ -4,6 +4,8 @@ import jakarta.persistence.Column; import jakarta.persistence.Entity; +import jakarta.persistence.GeneratedValue; +import jakarta.persistence.GenerationType; import jakarta.persistence.Id; import jakarta.persistence.OneToMany; import jakarta.persistence.Table; @@ -13,6 +15,7 @@ public class Customer { @Id + @GeneratedValue(strategy = GenerationType.IDENTITY) Long id; @Column(name = "name", nullable = false) String name; @@ -22,8 +25,7 @@ public class Customer { public Customer() { } - public Customer(Long id, String name) { - this.id = id; + public Customer(String name) { this.name = name; } diff --git a/src/main/java/com/demo/sqlOptimization/entities/Order.java b/src/main/java/com/demo/sqlOptimization/entities/Order.java index 5767227..a001177 100644 --- a/src/main/java/com/demo/sqlOptimization/entities/Order.java +++ b/src/main/java/com/demo/sqlOptimization/entities/Order.java @@ -1,5 +1,7 @@ package com.demo.sqlOptimization.entities; +import com.fasterxml.jackson.annotation.JsonIgnoreProperties; + import jakarta.persistence.Column; import jakarta.persistence.Entity; import jakarta.persistence.GeneratedValue; @@ -20,6 +22,7 @@ public class Order { String description; @ManyToOne @JoinColumn(name = "customer_id", nullable = false) + @JsonIgnoreProperties("orders") Customer customer; public Order() { diff --git a/src/main/java/com/demo/sqlOptimization/repository/CustomerRepository.java b/src/main/java/com/demo/sqlOptimization/repository/CustomerRepository.java new file mode 100644 index 0000000..0978f87 --- /dev/null +++ b/src/main/java/com/demo/sqlOptimization/repository/CustomerRepository.java @@ -0,0 +1,9 @@ +package com.demo.sqlOptimization.repository; + +import org.springframework.data.jpa.repository.JpaRepository; + +import com.demo.sqlOptimization.entities.Customer; + +public interface CustomerRepository extends JpaRepository { + +} diff --git a/src/main/java/com/demo/sqlOptimization/repository/OrderRepository.java b/src/main/java/com/demo/sqlOptimization/repository/OrderRepository.java index 6b5d59a..05e8805 100644 --- a/src/main/java/com/demo/sqlOptimization/repository/OrderRepository.java +++ b/src/main/java/com/demo/sqlOptimization/repository/OrderRepository.java @@ -1,14 +1,9 @@ package com.demo.sqlOptimization.repository; -import java.util.List; - import org.springframework.data.jpa.repository.JpaRepository; -import org.springframework.data.jpa.repository.Query; import com.demo.sqlOptimization.entities.Order; public interface OrderRepository extends JpaRepository { - @Query("SELECT o FROM Order o JOIN o.customer") - List findAllWithCustomer(); } From 00058239b05e83e321fe4ecb561e3cb4f9c836b3 Mon Sep 17 00:00:00 2001 From: KaranSinghG Date: Sat, 20 Jun 2026 13:09:26 +0530 Subject: [PATCH 7/7] Fix formatting and correct data volume in performance baseline section of README --- README.md | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/README.md b/README.md index ad06766..bc30173 100644 --- a/README.md +++ b/README.md @@ -3,14 +3,14 @@ A practical deep-dive into identifying and resolving database bottlenecks, specifically the N+1 query problem and missing indexes in Spring Data JPA. -## 📊 Performance Baseline (Unoptimized-Data-small) +## Performance Baseline (Unoptimized-Data-small) - **Data Volume:** 1,000 Customers, 20,000 Orders - **Endpoint:** `/api/orders/all` - **Total DB Queries Executed:** 1,001 - **Average Response Time:** 83 ms (10 calls) -## 📊 Performance Baseline (Unoptimized-Data-large) -- **Data Volume:** 10,000 Customers, 2000,000 Orders +## Performance Baseline (Unoptimized-Data-large) +- **Data Volume:** 10,000 Customers, 2,000,000 Orders - **Endpoint:** `/api/orders/all` - **Total DB Queries Executed:** 1,001 - **Average Response Time:** 7.06 s (10 calls)