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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>MySQL Simulator Pro</title>
<link rel="preconnect" href="https://fonts.googleapis.com">
<link href="https://fonts.googleapis.com/css2?family=Bebas+Neue&family=JetBrains+Mono:ital,wght@0,300;0,400;0,500;0,700;1,400&family=Nunito:wght@300;400;500;600;700&display=swap" rel="stylesheet">
<style>
:root {
--bg:#1a1f2e; --bg2:#222840; --bg3:#2a3150; --bg4:#323a5a;
--border:rgba(180,190,230,0.10); --border2:rgba(180,190,230,0.18);
--orange:#f97316; --orange2:#fb923c; --orng-dim:rgba(249,115,22,0.10); --orng-glow:rgba(249,115,22,0.30);
--cyan:#38bdf8; --cyan-dim:rgba(56,189,248,0.09);
--green:#4ade80; --green-dim:rgba(74,222,128,0.09);
--red:#f87171; --red-dim:rgba(248,113,113,0.09);
--yellow:#fde047; --yellow-dim:rgba(253,224,71,0.09);
--purple:#c084fc; --purple-dim:rgba(192,132,252,0.09);
--pink:#f472b6; --pink-dim:rgba(244,114,182,0.09);
--text:#dde4f0; --text2:#8896b3; --text3:#4a5478;
--disp:'Bebas Neue',sans-serif; --mono:'JetBrains Mono',monospace; --ui:'Nunito',sans-serif;
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box;}
html,body{height:100%;overflow:hidden;}
::-webkit-scrollbar{width:5px;height:5px;}
::-webkit-scrollbar-track{background:transparent;}
::-webkit-scrollbar-thumb{background:var(--bg4);border-radius:4px;}
::-webkit-scrollbar-thumb:hover{background:#3d4870;}
body{font-family:var(--ui);background:var(--bg);color:var(--text);display:flex;flex-direction:column;height:100vh;}
/* ── HEADER ── */
.app-header{height:54px;background:var(--bg2);border-bottom:1px solid var(--border);display:flex;align-items:center;padding:0 16px;gap:0;flex-shrink:0;user-select:none;box-shadow:0 1px 12px rgba(0,0,0,.25);}
.logo{display:flex;align-items:baseline;gap:8px;margin-right:20px;}
.logo-main{font-family:var(--disp);font-size:1.5rem;letter-spacing:.06em;color:var(--orange);line-height:1;text-shadow:0 0 20px var(--orng-glow);}
.logo-sub{font-family:var(--mono);font-size:.58rem;color:var(--text3);letter-spacing:.15em;text-transform:uppercase;}
.logo-pro{font-family:var(--mono);font-size:.55rem;font-weight:700;padding:2px 6px;background:linear-gradient(135deg,var(--orange),var(--purple));color:#fff;border-radius:3px;letter-spacing:.08em;}
.header-tabs{display:flex;gap:2px;height:100%;align-items:flex-end;}
.htab{height:38px;padding:0 14px;font-family:var(--mono);font-size:.7rem;font-weight:500;letter-spacing:.06em;color:var(--text3);background:transparent;border:none;border-bottom:2px solid transparent;cursor:pointer;transition:all .15s;display:flex;align-items:center;gap:6px;white-space:nowrap;}
.htab:hover{color:var(--text2);}
.htab.active{color:var(--orange);border-bottom-color:var(--orange);}
.htab-dot{width:6px;height:6px;border-radius:50%;flex-shrink:0;}
.htab-dot.create{background:var(--cyan);}
.htab-dot.alter{background:var(--purple);}
.htab-dot.select{background:var(--orange);}
.htab-dot.joins{background:var(--green);}
.header-right{margin-left:auto;display:flex;align-items:center;gap:8px;}
.hdr-badge{font-family:var(--mono);font-size:.58rem;letter-spacing:.12em;text-transform:uppercase;padding:3px 8px;border-radius:4px;border:1px solid var(--border2);color:var(--text3);}
.hdr-badge.connected{border-color:rgba(74,222,128,.35);color:var(--green);background:var(--green-dim);}
.hdr-badge.tx-active{border-color:rgba(253,224,71,.4);color:var(--yellow);background:var(--yellow-dim);animation:txpulse 1.5s infinite;}
.hdr-badge.tx-dirty{border-color:rgba(244,114,182,.4);color:var(--pink);background:var(--pink-dim);}
@keyframes txpulse{0%,100%{opacity:1;}50%{opacity:.6;}}
.hdr-user{display:flex;align-items:center;gap:5px;padding:3px 10px;border-radius:4px;border:1px solid var(--border2);background:var(--bg3);font-family:var(--mono);font-size:.6rem;color:var(--purple);cursor:pointer;transition:all .13s;}
.hdr-user:hover{border-color:var(--purple);}
.btn-hdr{display:flex;align-items:center;gap:5px;padding:5px 11px;background:var(--bg3);border:1px solid var(--border2);border-radius:5px;font-family:var(--mono);font-size:.62rem;font-weight:600;letter-spacing:.06em;cursor:pointer;transition:all .15s;white-space:nowrap;}
.btn-hdr.cyan{color:var(--cyan);} .btn-hdr.cyan:hover{border-color:var(--cyan);background:var(--cyan-dim);}
.btn-hdr.green{color:var(--green);} .btn-hdr.green:hover{border-color:var(--green);background:var(--green-dim);}
.btn-hdr.purple{color:var(--purple);} .btn-hdr.purple:hover{border-color:var(--purple);background:var(--purple-dim);}
/* ── WORKSPACE ── */
.workspace{flex:1;display:grid;grid-template-columns:272px 1fr;min-height:0;overflow:hidden;}
/* ── SIDEBAR ── */
.sidebar{background:var(--bg2);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden;min-height:0;}
.sidebar-tabs{display:flex;border-bottom:1px solid var(--border);flex-shrink:0;overflow-x:auto;}
.stab{flex:1;min-width:0;height:34px;font-family:var(--mono);font-size:.58rem;letter-spacing:.08em;text-transform:uppercase;color:var(--text3);background:transparent;border:none;border-bottom:2px solid transparent;cursor:pointer;transition:all .15s;white-space:nowrap;padding:0 6px;}
.stab:hover{color:var(--text2);}
.stab.active{color:var(--orange);border-bottom-color:var(--orange);background:var(--orng-dim);}
.sidebar-panel{display:none;flex-direction:column;flex:1;overflow:hidden;min-height:0;}
.sidebar-panel.active{display:flex;}
.schema-search{padding:8px 10px;border-bottom:1px solid var(--border);flex-shrink:0;}
.schema-search input{width:100%;background:var(--bg3);border:1px solid var(--border);border-radius:5px;padding:6px 10px;font-family:var(--mono);font-size:.72rem;color:var(--text);outline:none;transition:border-color .15s;}
.schema-search input:focus{border-color:var(--orange);}
.schema-search input::placeholder{color:var(--text3);}
.schema-list{overflow-y:auto;flex:1;padding:4px 0;}
.schema-table{cursor:pointer;border-bottom:1px solid var(--border);}
.schema-table-header{display:flex;align-items:center;gap:7px;padding:8px 12px;transition:background .12s;}
.schema-table-header:hover{background:var(--bg3);}
.schema-table-header.expanded{background:var(--orng-dim);}
.st-icon{font-size:.75rem;color:var(--orange);flex-shrink:0;}
.st-icon.csv-t{color:var(--cyan);}
.st-name{font-family:var(--mono);font-size:.74rem;font-weight:500;color:var(--text);flex:1;overflow:hidden;text-overflow:ellipsis;}
.st-count{font-family:var(--mono);font-size:.6rem;color:var(--text3);}
.st-arrow{font-size:.6rem;color:var(--text3);transition:transform .15s;}
.expanded .st-arrow{transform:rotate(90deg);color:var(--orange);}
.schema-cols{display:none;padding:2px 0 6px 28px;background:rgba(0,0,0,.15);}
.schema-cols.open{display:block;}
.schema-col{display:flex;align-items:center;gap:5px;padding:3px 8px;font-family:var(--mono);font-size:.66rem;color:var(--text2);}
.sc-badge{font-size:.5rem;font-weight:700;padding:1px 4px;border-radius:2px;flex-shrink:0;}
.sc-pk{background:var(--orng-dim);color:var(--orange);border:1px solid rgba(249,115,22,.3);}
.sc-fk{background:var(--cyan-dim);color:var(--cyan);border:1px solid rgba(56,189,248,.3);}
.sc-idx{background:var(--green-dim);color:var(--green);border:1px solid rgba(74,222,128,.3);}
.sc-type{color:var(--text3);margin-left:auto;font-size:.63rem;}
.preview-btn{display:block;width:calc(100% - 28px);margin:3px 14px 6px;padding:4px 8px;background:transparent;border:1px solid var(--border);border-radius:4px;font-family:var(--mono);font-size:.62rem;color:var(--text3);cursor:pointer;text-align:left;transition:all .12s;}
.preview-btn:hover{border-color:var(--cyan);color:var(--cyan);background:var(--cyan-dim);}
.csv-badge{font-family:var(--mono);font-size:.5rem;font-weight:700;padding:1px 4px;border-radius:2px;background:rgba(192,132,252,.12);color:var(--purple);border:1px solid rgba(192,132,252,.25);flex-shrink:0;}
/* ── INDEX PANEL ── */
.index-list{overflow-y:auto;flex:1;padding:8px 0;}
.index-group{margin-bottom:2px;}
.index-group-title{padding:8px 12px 4px;font-family:var(--mono);font-size:.58rem;letter-spacing:.14em;text-transform:uppercase;color:var(--text3);border-bottom:1px solid var(--border);}
.index-item{padding:8px 12px;border-bottom:1px solid var(--border);font-family:var(--mono);font-size:.7rem;color:var(--text2);}
.index-item-name{color:var(--green);font-weight:500;margin-bottom:3px;}
.index-item-meta{display:flex;gap:10px;font-size:.62rem;color:var(--text3);}
.index-empty{padding:24px 16px;font-family:var(--mono);font-size:.72rem;color:var(--text3);text-align:center;line-height:2;}
/* ── SECURITY PANEL ── */
.sec-panel{overflow-y:auto;flex:1;padding:0;}
.sec-section{border-bottom:1px solid var(--border);}
.sec-section-title{padding:8px 12px 6px;font-family:var(--mono);font-size:.58rem;letter-spacing:.14em;text-transform:uppercase;color:var(--text3);display:flex;align-items:center;justify-content:space-between;}
.sec-item{display:flex;align-items:center;gap:8px;padding:7px 12px;border-bottom:1px solid var(--border);transition:background .12s;}
.sec-item:hover{background:var(--bg3);}
.sec-item-icon{font-size:.85rem;}
.sec-item-name{font-family:var(--mono);font-size:.74rem;font-weight:500;color:var(--text);flex:1;}
.sec-item-role{font-family:var(--mono);font-size:.62rem;color:var(--purple);}
.sec-item-badge{font-family:var(--mono);font-size:.52rem;font-weight:700;padding:2px 6px;border-radius:3px;background:var(--green-dim);color:var(--green);border:1px solid rgba(74,222,128,.3);}
.sec-item-badge.admin{background:var(--orng-dim);color:var(--orange);border-color:rgba(249,115,22,.3);}
.sec-active-user{padding:10px 12px;background:var(--orng-dim);border-bottom:2px solid var(--orange);font-family:var(--mono);font-size:.72rem;}
.sau-label{color:var(--text3);font-size:.6rem;letter-spacing:.1em;text-transform:uppercase;margin-bottom:4px;}
.sau-name{color:var(--orange);font-weight:600;}
.sau-roles{color:var(--text3);font-size:.65rem;margin-top:3px;}
/* ── LESSONS PANEL ── */
.lessons-list{overflow-y:auto;flex:1;padding:6px 0;}
.lesson-group{margin-bottom:4px;}
.lesson-group-title{padding:7px 12px 3px;font-family:var(--mono);font-size:.58rem;letter-spacing:.14em;text-transform:uppercase;color:var(--text3);}
.lesson-item{display:flex;align-items:flex-start;gap:8px;padding:8px 12px;cursor:pointer;border-bottom:1px solid var(--border);transition:background .12s;}
.lesson-item:hover{background:var(--bg3);}
.li-dot{width:6px;height:6px;border-radius:50%;margin-top:5px;flex-shrink:0;}
.li-dot.create{background:var(--cyan);} .li-dot.alter{background:var(--purple);}
.li-dot.select{background:var(--orange);} .li-dot.joins{background:var(--green);}
.li-text{font-size:.77rem;color:var(--text2);line-height:1.4;}
.li-text strong{display:block;color:var(--text);font-weight:600;font-size:.78rem;margin-bottom:2px;}
/* ── RIGHT PANE ── */
.right-pane{display:grid;grid-template-rows:1fr 1fr;min-height:0;overflow:hidden;}
.editor-zone{display:flex;flex-direction:column;border-bottom:1px solid var(--border);min-height:0;overflow:hidden;}
.zone-header{height:38px;padding:0 14px;display:flex;align-items:center;gap:10px;border-bottom:1px solid var(--border);background:var(--bg2);flex-shrink:0;}
.zone-label{font-family:var(--mono);font-size:.62rem;letter-spacing:.14em;text-transform:uppercase;color:var(--text3);display:flex;align-items:center;gap:7px;}
.zone-label-dot{width:7px;height:7px;border-radius:50%;background:var(--orange);box-shadow:0 0 10px var(--orange);}
.zone-actions{display:flex;gap:6px;margin-left:auto;align-items:center;}
.btn-run{display:flex;align-items:center;gap:6px;padding:5px 16px;background:var(--orange);color:#0f0a00;border:none;border-radius:5px;font-family:var(--mono);font-size:.7rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;cursor:pointer;transition:all .15s;}
.btn-run:hover{background:var(--orange2);box-shadow:0 0 18px var(--orng-glow);}
.btn-sm{padding:4px 10px;background:transparent;border:1px solid var(--border2);border-radius:4px;font-family:var(--mono);font-size:.63rem;color:var(--text3);cursor:pointer;transition:all .13s;}
.btn-sm:hover{border-color:var(--text2);color:var(--text2);}
.btn-sm.active-mode{border-color:var(--yellow);color:var(--yellow);background:var(--yellow-dim);}
.editor-inner{flex:1;display:flex;overflow:hidden;position:relative;background:#131826;}
.line-nums{width:44px;padding:14px 0;background:var(--bg2);border-right:1px solid var(--border);overflow:hidden;flex-shrink:0;text-align:right;}
.line-num{height:21px;padding-right:10px;font-family:var(--mono);font-size:.72rem;color:var(--text3);line-height:21px;}
#editor{flex:1;padding:14px 16px;background:transparent;color:var(--text);font-family:var(--mono);font-size:.82rem;line-height:21px;border:none;outline:none;resize:none;caret-color:var(--orange);tab-size:2;}
#editor::placeholder{color:var(--text3);}
#editor::selection{background:rgba(249,115,22,.18);}
/* ── RESULTS ── */
.results-zone{display:flex;flex-direction:column;min-height:0;overflow:hidden;background:var(--bg);}
.results-tabs{height:36px;display:flex;align-items:flex-end;padding:0 14px;gap:1px;border-bottom:1px solid var(--border);background:var(--bg2);flex-shrink:0;overflow-x:auto;}
.rtab{height:28px;padding:0 12px;font-family:var(--mono);font-size:.63rem;letter-spacing:.06em;color:var(--text3);background:transparent;border:1px solid transparent;border-bottom:none;border-radius:4px 4px 0 0;cursor:pointer;transition:all .13s;white-space:nowrap;flex-shrink:0;}
.rtab:hover{color:var(--text2);}
.rtab.active{background:var(--bg);border-color:var(--border);color:var(--text);}
.rtab.has-data::after{content:'●';font-size:.4rem;margin-left:4px;color:var(--orange);vertical-align:middle;}
.results-meta{padding:5px 14px;display:flex;align-items:center;gap:14px;border-bottom:1px solid var(--border);background:var(--bg2);flex-shrink:0;}
.rm-item{font-family:var(--mono);font-size:.62rem;color:var(--text3);display:flex;align-items:center;gap:4px;}
.rm-val{color:var(--text2);font-weight:500;}
.rm-ok{color:var(--green);} .rm-err{color:var(--red);} .rm-muted{color:var(--text3);}
.results-content{flex:1;overflow:auto;}
.data-table{width:100%;border-collapse:collapse;font-family:var(--mono);font-size:.75rem;}
.data-table th{position:sticky;top:0;padding:9px 14px;background:var(--bg2);color:var(--cyan);font-weight:500;text-align:left;border-bottom:1px solid var(--border2);white-space:nowrap;z-index:2;}
.data-table td{padding:7px 14px;border-bottom:1px solid var(--border);color:var(--text);white-space:nowrap;max-width:260px;overflow:hidden;text-overflow:ellipsis;}
.data-table td.null-val{color:var(--text3);font-style:italic;}
.data-table td.num-val{color:var(--cyan);}
.data-table tr:hover td{background:rgba(255,255,255,.03);}
.data-table tr:nth-child(even) td{background:rgba(255,255,255,.012);}
.result-msg{padding:18px 20px;font-family:var(--mono);font-size:.79rem;line-height:1.9;}
.msg-ok{color:var(--green);} .msg-err{color:var(--red);} .msg-info{color:var(--cyan);}
.msg-warn{color:var(--yellow);} .msg-muted{color:var(--text3);}
.empty-results{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;gap:10px;color:var(--text3);}
.empty-icon{font-family:var(--disp);font-size:3rem;color:var(--bg4);letter-spacing:.1em;}
.empty-text{font-family:var(--mono);font-size:.75rem;text-align:center;line-height:1.7;}
/* ── EXPLAIN PLAN ── */
.explain-container{padding:16px;}
.explain-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;}
.explain-title{font-family:var(--disp);font-size:1.1rem;letter-spacing:.08em;color:var(--cyan);}
.explain-total{font-family:var(--mono);font-size:.72rem;color:var(--text3);}
.explain-total span{color:var(--yellow);font-weight:600;}
.explain-nodes{display:flex;flex-direction:column;gap:0;}
.explain-node{display:flex;gap:12px;padding:10px 14px;border:1px solid var(--border);border-radius:6px;margin-bottom:6px;position:relative;transition:all .15s;cursor:default;}
.explain-node:hover{border-color:var(--border2);background:rgba(255,255,255,.02);}
.explain-node.scan{border-left:3px solid var(--orange);}
.explain-node.index-scan{border-left:3px solid var(--green);}
.explain-node.join{border-left:3px solid var(--cyan);}
.explain-node.filter{border-left:3px solid var(--yellow);}
.explain-node.sort{border-left:3px solid var(--purple);}
.explain-node.limit{border-left:3px solid var(--pink);}
.explain-node.project{border-left:3px solid var(--text3);}
.explain-node.aggregate{border-left:3px solid var(--orange2);}
.en-step{width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-family:var(--mono);font-size:.7rem;font-weight:700;flex-shrink:0;margin-top:2px;}
.scan .en-step{background:var(--orng-dim);color:var(--orange);}
.index-scan .en-step{background:var(--green-dim);color:var(--green);}
.join .en-step{background:var(--cyan-dim);color:var(--cyan);}
.filter .en-step{background:var(--yellow-dim);color:var(--yellow);}
.sort .en-step{background:var(--purple-dim);color:var(--purple);}
.limit .en-step{background:var(--pink-dim);color:var(--pink);}
.project .en-step{background:rgba(74,86,120,.3);color:var(--text2);}
.aggregate .en-step{background:var(--orng-dim);color:var(--orange2);}
.en-body{flex:1;}
.en-type{font-family:var(--mono);font-size:.72rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;margin-bottom:4px;}
.scan .en-type{color:var(--orange);}
.index-scan .en-type{color:var(--green);}
.join .en-type{color:var(--cyan);}
.filter .en-type{color:var(--yellow);}
.sort .en-type{color:var(--purple);}
.limit .en-type{color:var(--pink);}
.project .en-type{color:var(--text2);}
.aggregate .en-type{color:var(--orange2);}
.en-detail{font-family:var(--mono);font-size:.68rem;color:var(--text2);line-height:1.7;}
.en-detail code{color:var(--cyan);background:var(--cyan-dim);padding:1px 5px;border-radius:3px;}
.en-meta{display:flex;flex-direction:column;align-items:flex-end;gap:4px;flex-shrink:0;}
.en-cost{font-family:var(--mono);font-size:.65rem;color:var(--text3);}
.en-rows{font-family:var(--mono);font-size:.65rem;color:var(--text2);}
.en-rows span{color:var(--cyan);}
.en-index-badge{font-family:var(--mono);font-size:.55rem;font-weight:700;padding:2px 6px;border-radius:3px;background:var(--green-dim);color:var(--green);border:1px solid rgba(74,222,128,.3);}
.explain-connector{width:2px;height:10px;background:var(--border2);margin:0 auto 0 27px;}
.explain-tip{margin-top:14px;padding:10px 14px;background:var(--bg3);border:1px solid var(--border);border-radius:6px;font-family:var(--mono);font-size:.68rem;color:var(--text2);line-height:1.7;}
.explain-tip strong{color:var(--orange);}
/* ── PERFORMANCE ── */
.perf-container{padding:16px;}
.perf-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;}
.perf-title{font-family:var(--disp);font-size:1.1rem;letter-spacing:.08em;color:var(--purple);}
.perf-controls{display:flex;gap:8px;align-items:center;}
.perf-input{background:var(--bg3);border:1px solid var(--border2);border-radius:4px;padding:4px 10px;font-family:var(--mono);font-size:.7rem;color:var(--text);width:70px;outline:none;transition:border-color .15s;text-align:center;}
.perf-input:focus{border-color:var(--purple);}
.btn-profile{padding:5px 14px;background:var(--purple-dim);border:1px solid rgba(192,132,252,.35);border-radius:4px;font-family:var(--mono);font-size:.68rem;color:var(--purple);cursor:pointer;transition:all .13s;}
.btn-profile:hover{background:rgba(192,132,252,.2);border-color:var(--purple);}
.perf-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:16px;}
.perf-stat{background:var(--bg2);border:1px solid var(--border);border-radius:6px;padding:12px 14px;text-align:center;}
.ps-val{font-family:var(--mono);font-size:1.3rem;font-weight:700;color:var(--purple);margin-bottom:3px;}
.ps-label{font-family:var(--mono);font-size:.6rem;color:var(--text3);letter-spacing:.1em;text-transform:uppercase;}
.perf-chart{background:var(--bg2);border:1px solid var(--border);border-radius:6px;padding:14px;margin-bottom:16px;}
.perf-chart-title{font-family:var(--mono);font-size:.62rem;color:var(--text3);letter-spacing:.1em;text-transform:uppercase;margin-bottom:10px;}
.perf-bars{display:flex;align-items:flex-end;gap:4px;height:80px;}
.perf-bar{flex:1;background:var(--purple-dim);border:1px solid rgba(192,132,252,.3);border-radius:3px 3px 0 0;transition:all .2s;position:relative;min-width:4px;}
.perf-bar:hover{background:rgba(192,132,252,.3);}
.perf-bar-tip{position:absolute;bottom:calc(100% + 4px);left:50%;transform:translateX(-50%);background:var(--bg4);border:1px solid var(--border2);border-radius:3px;padding:2px 5px;font-family:var(--mono);font-size:.55rem;color:var(--text);white-space:nowrap;display:none;}
.perf-bar:hover .perf-bar-tip{display:block;}
.perf-compare{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
.pc-pane{background:var(--bg2);border:1px solid var(--border);border-radius:6px;overflow:hidden;}
.pc-label{padding:8px 12px;border-bottom:1px solid var(--border);font-family:var(--mono);font-size:.62rem;letter-spacing:.1em;text-transform:uppercase;display:flex;align-items:center;justify-content:space-between;}
.pc-label.a{color:var(--cyan);}
.pc-label.b{color:var(--orange);}
.pc-textarea{width:100%;background:transparent;border:none;outline:none;padding:10px 12px;font-family:var(--mono);font-size:.72rem;color:var(--text);resize:none;height:80px;line-height:1.6;}
.pc-result{padding:8px 12px;border-top:1px solid var(--border);font-family:var(--mono);font-size:.7rem;}
.btn-compare{width:100%;padding:8px;background:var(--bg3);border:1px solid var(--border2);border-radius:4px;font-family:var(--mono);font-size:.7rem;color:var(--text2);cursor:pointer;margin-top:12px;transition:all .13s;}
.btn-compare:hover{border-color:var(--purple);color:var(--purple);}
/* ── HISTORY ── */
.history-list{padding:10px 14px;display:flex;flex-direction:column;gap:6px;}
.history-item{padding:8px 10px;background:var(--bg2);border:1px solid var(--border);border-radius:5px;cursor:pointer;transition:border-color .13s;}
.history-item:hover{border-color:var(--orange);}
.history-item-sql{font-family:var(--mono);font-size:.7rem;color:var(--text2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-bottom:3px;}
.history-item-meta{font-family:var(--mono);font-size:.6rem;color:var(--text3);display:flex;gap:10px;}
/* ── STATUS BAR ── */
.statusbar{height:24px;background:linear-gradient(90deg,var(--orange),var(--orange2));display:flex;align-items:center;padding:0 14px;gap:14px;flex-shrink:0;}
.sb{font-family:var(--mono);font-size:.57rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:#1a0a00;}
.sb-r{margin-left:auto;}
.sb-sep{opacity:.3;}
.sb-tx{background:rgba(0,0,0,.2);padding:1px 7px;border-radius:2px;font-style:normal;}
.sb-tx.active{color:var(--yellow);}
/* ── LESSON OVERLAY ── */
.lesson-detail{display:none;position:absolute;bottom:24px;left:272px;right:0;max-height:280px;background:var(--bg2);border-top:2px solid var(--orange);z-index:50;overflow-y:auto;padding:18px 22px;box-shadow:0 -12px 50px rgba(0,0,0,.5);}
.lesson-detail.open{display:block;}
.ld-close{position:absolute;top:10px;right:14px;background:none;border:none;color:var(--text3);cursor:pointer;font-size:1rem;transition:color .12s;}
.ld-close:hover{color:var(--text);}
.ld-title{font-family:var(--disp);font-size:1.1rem;letter-spacing:.08em;color:var(--orange);margin-bottom:8px;}
.ld-desc{font-size:.8rem;color:var(--text2);line-height:1.7;margin-bottom:12px;}
.ld-examples{display:flex;flex-direction:column;gap:6px;}
.ld-example{background:var(--bg3);border:1px solid var(--border);border-radius:5px;padding:9px 12px;cursor:pointer;transition:all .13s;display:flex;align-items:flex-start;gap:10px;}
.ld-example:hover{border-color:var(--orange);background:var(--orng-dim);}
.ld-example-label{font-family:var(--mono);font-size:.6rem;color:var(--orange);flex-shrink:0;margin-top:2px;min-width:64px;}
.ld-example-sql{font-family:var(--mono);font-size:.72rem;color:var(--text2);white-space:pre-wrap;line-height:1.6;}
/* ── MODALS ── */
.modal-backdrop{display:none;position:fixed;inset:0;background:rgba(0,0,0,.65);backdrop-filter:blur(4px);z-index:100;align-items:center;justify-content:center;}
.modal-backdrop.open{display:flex;}
.modal{background:var(--bg2);border:1px solid var(--border2);border-radius:10px;width:580px;max-width:96vw;max-height:92vh;box-shadow:0 20px 80px rgba(0,0,0,.6);overflow:hidden;display:flex;flex-direction:column;}
.modal.wide{width:760px;}
.modal-header{padding:16px 20px 12px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:10px;flex-shrink:0;}
.modal-title{font-family:var(--disp);font-size:1.1rem;letter-spacing:.08em;}
.modal-close{margin-left:auto;background:none;border:none;color:var(--text3);font-size:1rem;cursor:pointer;transition:color .12s;padding:2px 6px;}
.modal-close:hover{color:var(--text);}
.modal-body{padding:18px 20px;overflow-y:auto;flex:1;}
.modal-actions{display:flex;gap:8px;justify-content:flex-end;padding:12px 20px 16px;border-top:1px solid var(--border);flex-shrink:0;}
.modal-field{margin-bottom:12px;}
.modal-label{display:block;font-family:var(--mono);font-size:.62rem;letter-spacing:.1em;text-transform:uppercase;color:var(--text3);margin-bottom:5px;}
.modal-input{width:100%;background:var(--bg3);border:1px solid var(--border2);border-radius:5px;padding:7px 10px;font-family:var(--mono);font-size:.76rem;color:var(--text);outline:none;transition:border-color .15s;}
.modal-input:focus{border-color:var(--cyan);}
.modal-select{width:100%;background:var(--bg3);border:1px solid var(--border2);border-radius:5px;padding:7px 10px;font-family:var(--mono);font-size:.76rem;color:var(--text);outline:none;cursor:pointer;appearance:none;}
.modal-select:focus{border-color:var(--cyan);}
.btn-primary{padding:7px 20px;background:var(--cyan);color:#071320;border:none;border-radius:5px;font-family:var(--mono);font-size:.7rem;font-weight:700;letter-spacing:.06em;cursor:pointer;transition:all .15s;}
.btn-primary:hover{background:#7dd3fc;box-shadow:0 0 16px rgba(56,189,248,.25);}
.btn-primary:disabled{opacity:.4;cursor:not-allowed;}
.btn-primary.orange{background:var(--orange);color:#0f0a00;}
.btn-primary.orange:hover{background:var(--orange2);}
.btn-primary.purple{background:var(--purple);color:#0f0710;}
.btn-primary.purple:hover{background:#d8a5ff;}
.btn-primary.green{background:var(--green);color:#071a0e;}
.btn-primary.green:hover{background:#86efac;}
.btn-cancel{padding:7px 16px;background:transparent;border:1px solid var(--border2);border-radius:5px;font-family:var(--mono);font-size:.7rem;color:var(--text3);cursor:pointer;transition:all .13s;}
.btn-cancel:hover{border-color:var(--text2);color:var(--text2);}
/* ── SCHEMA BUILDER ── */
.sb-col-row{display:grid;grid-template-columns:1fr 100px 28px 28px 28px 26px;gap:6px;align-items:center;padding:7px 0;border-bottom:1px solid var(--border);}
.sb-col-row:last-child{border-bottom:none;}
.sb-col-input{background:var(--bg3);border:1px solid var(--border);border-radius:4px;padding:5px 8px;font-family:var(--mono);font-size:.72rem;color:var(--text);outline:none;transition:border-color .15s;}
.sb-col-input:focus{border-color:var(--cyan);}
.sb-col-check{display:flex;align-items:center;justify-content:center;}
.sb-col-check input[type=checkbox]{appearance:none;width:16px;height:16px;border:1px solid var(--border2);border-radius:3px;background:var(--bg3);cursor:pointer;position:relative;transition:all .13s;}
.sb-col-check input[type=checkbox]:checked{background:var(--orange);border-color:var(--orange);}
.sb-col-check input[type=checkbox]:checked::after{content:'✓';position:absolute;top:-1px;left:2px;font-size:.65rem;color:#000;}
.sb-col-check label{font-family:var(--mono);font-size:.55rem;color:var(--text3);margin-left:3px;cursor:pointer;}
.sb-col-del{background:none;border:none;color:var(--text3);cursor:pointer;font-size:.85rem;transition:color .13s;padding:2px;}
.sb-col-del:hover{color:var(--red);}
.sb-header-row{display:grid;grid-template-columns:1fr 100px 28px 28px 28px 26px;gap:6px;padding:4px 0 6px;font-family:var(--mono);font-size:.58rem;letter-spacing:.1em;text-transform:uppercase;color:var(--text3);}
.sb-preview{background:var(--bg3);border:1px solid var(--border);border-radius:5px;padding:10px 12px;font-family:var(--mono);font-size:.72rem;color:var(--text2);margin-top:14px;white-space:pre;overflow-x:auto;max-height:140px;}
.sb-add-btn{display:flex;align-items:center;gap:5px;padding:5px 12px;background:transparent;border:1px dashed var(--border2);border-radius:4px;font-family:var(--mono);font-size:.65rem;color:var(--text3);cursor:pointer;margin-top:8px;transition:all .13s;width:100%;}
.sb-add-btn:hover{border-color:var(--cyan);color:var(--cyan);}
/* ── DATA IMPORT MODAL ── */
.upload-drop-zone{border:2px dashed var(--border2);border-radius:8px;padding:28px 20px;text-align:center;cursor:pointer;transition:all .15s;margin-bottom:14px;position:relative;}
.upload-drop-zone:hover,.upload-drop-zone.drag-over{border-color:var(--cyan);background:var(--cyan-dim);}
.upload-drop-zone input[type=file]{position:absolute;inset:0;opacity:0;cursor:pointer;width:100%;height:100%;}
.udz-icon{font-size:1.8rem;margin-bottom:8px;}
.udz-title{font-family:var(--mono);font-size:.8rem;color:var(--text);margin-bottom:3px;}
.udz-sub{font-family:var(--mono);font-size:.66rem;color:var(--text3);}
.udz-sub span{color:var(--cyan);}
.modal-preview{background:var(--bg3);border:1px solid var(--border);border-radius:5px;padding:8px 10px;font-family:var(--mono);font-size:.68rem;color:var(--text2);max-height:100px;overflow-y:auto;margin-bottom:12px;display:none;}
.modal-preview.visible{display:block;}
.datasets-grid{display:grid;grid-template-columns:1fr 1fr;gap:7px;margin-bottom:14px;}
.dataset-card{background:var(--bg3);border:1px solid var(--border);border-radius:6px;padding:10px 12px;cursor:pointer;transition:all .15s;}
.dataset-card:hover{border-color:var(--green);background:var(--green-dim);}
.dataset-card.loaded{border-color:rgba(74,222,128,.35);background:rgba(74,222,128,.04);}
.dc-badge{display:inline-block;font-family:var(--mono);font-size:.52rem;font-weight:700;letter-spacing:.08em;padding:1px 5px;border-radius:3px;margin-bottom:4px;}
.dc-badge.ecom{background:rgba(249,115,22,.15);color:var(--orange);border:1px solid rgba(249,115,22,.25);}
.dc-badge.edu{background:rgba(56,189,248,.12);color:var(--cyan);border:1px solid rgba(56,189,248,.25);}
.dc-badge.fin{background:rgba(74,222,128,.12);color:var(--green);border:1px solid rgba(74,222,128,.25);}
.dc-badge.hr{background:rgba(192,132,252,.12);color:var(--purple);border:1px solid rgba(192,132,252,.25);}
.dc-name{font-family:var(--mono);font-size:.74rem;font-weight:600;color:var(--text);margin-bottom:2px;}
.dc-meta{font-family:var(--mono);font-size:.61rem;color:var(--text3);}
.modal-divider{display:flex;align-items:center;gap:10px;margin:14px 0;font-family:var(--mono);font-size:.6rem;color:var(--text3);letter-spacing:.1em;}
.modal-divider::before,.modal-divider::after{content:'';flex:1;height:1px;background:var(--border);}
/* ── SECURITY MODAL ── */
.perm-grid{display:grid;grid-template-columns:auto 1fr 1fr 1fr 1fr 1fr;gap:1px;background:var(--border);border-radius:5px;overflow:hidden;font-family:var(--mono);font-size:.68rem;}
.perm-cell{padding:7px 10px;background:var(--bg2);}
.perm-cell.header{background:var(--bg3);color:var(--text2);font-size:.6rem;letter-spacing:.1em;text-transform:uppercase;}
.perm-cell.perm-name{color:var(--text);font-weight:500;}
.perm-cell.perm-yes{color:var(--green);text-align:center;}
.perm-cell.perm-no{color:var(--text3);text-align:center;}
.perm-cell.perm-cond{color:var(--yellow);text-align:center;}
/* ── TOAST ── */
.toast{position:fixed;bottom:36px;right:16px;padding:9px 16px;border-radius:6px;font-family:var(--mono);font-size:.72rem;font-weight:700;z-index:999;box-shadow:0 4px 20px rgba(0,0,0,.4);transition:opacity .3s;pointer-events:none;}
.toast.success{background:var(--green);color:#071a0e;}
.toast.error{background:var(--red);color:#1a0606;}
.toast.info{background:var(--cyan);color:#071320;}
.toast.warn{background:var(--yellow);color:#1a1200;}
</style>
</head>
<body>
<!-- ── HEADER ── -->
<header class="app-header">
<div class="logo">
<div class="logo-main">MySQL</div>
<div class="logo-sub">Simulator</div>
<div class="logo-pro">PRO</div>
</div>
<div class="header-tabs">
<button class="htab active" onclick="loadLesson('create',this)"><span class="htab-dot create"></span>CREATE</button>
<button class="htab" onclick="loadLesson('alter',this)"><span class="htab-dot alter"></span>ALTER</button>
<button class="htab" onclick="loadLesson('select',this)"><span class="htab-dot select"></span>SELECT</button>
<button class="htab" onclick="loadLesson('joins',this)"><span class="htab-dot joins"></span>JOINS</button>
</div>
<div class="header-right">
<button class="btn-hdr cyan" onclick="openDataModal()">
<svg width="11" height="11" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5"><path d="M21 15v4a2 2 0 01-2 2H5a2 2 0 01-2-2v-4M7 10l5 5 5-5M12 15V3"/></svg>Import
</button>
<button class="btn-hdr green" onclick="exportDB()">
<svg width="11" height="11" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5"><path d="M21 15v4a2 2 0 01-2 2H5a2 2 0 01-2-2v-4M17 8l-5-5-5 5M12 3v12"/></svg>Export
</button>
<button class="btn-hdr purple" onclick="openSchemaBuilder()">
<svg width="11" height="11" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5"><rect x="3" y="3" width="7" height="7"/><rect x="14" y="3" width="7" height="7"/><rect x="14" y="14" width="7" height="7"/><rect x="3" y="14" width="7" height="7"/></svg>Build
</button>
<div class="hdr-user" onclick="openSecurityModal()" title="Current user — click to manage">
<span>👤</span><span id="currentUserLabel">root</span>
</div>
<div class="hdr-badge" id="txBadge" style="display:none">⚡ TX</div>
<div class="hdr-badge connected">● connected</div>
<div class="hdr-badge" id="dbBadge">learning_db</div>
</div>
</header>
<!-- ── WORKSPACE ── -->
<div class="workspace">
<!-- ── SIDEBAR ── -->
<div class="sidebar">
<div class="sidebar-tabs">
<button class="stab active" onclick="switchSideTab('schema',this)">Schema</button>
<button class="stab" onclick="switchSideTab('indexes',this)">Indexes</button>
<button class="stab" onclick="switchSideTab('security',this)">Security</button>
<button class="stab" onclick="switchSideTab('lessons',this)">Lessons</button>
</div>
<!-- SCHEMA -->
<div class="sidebar-panel active" id="panel-schema">
<div class="schema-search"><input type="text" id="schemaSearch" placeholder="Filter tables…" oninput="filterSchema(this.value)"></div>
<div class="schema-list" id="schemaList"></div>
</div>
<!-- INDEXES -->
<div class="sidebar-panel" id="panel-indexes">
<div class="index-list" id="indexList"></div>
</div>
<!-- SECURITY -->
<div class="sidebar-panel" id="panel-security">
<div class="sec-panel" id="secPanel"></div>
</div>
<!-- LESSONS -->
<div class="sidebar-panel" id="panel-lessons">
<div class="lessons-list" id="lessonsList"></div>
</div>
</div>
<!-- ── RIGHT PANE ── -->
<div class="right-pane" style="position:relative">
<!-- EDITOR -->
<div class="editor-zone">
<div class="zone-header">
<div class="zone-label"><span class="zone-label-dot"></span>SQL Editor</div>
<div class="zone-actions">
<button class="btn-sm" onclick="clearEditor()">Clear</button>
<button class="btn-sm" onclick="formatSQL()">Format</button>
<button class="btn-sm" id="explainModeBtn" onclick="toggleExplainMode()" title="Toggle EXPLAIN mode">Explain</button>
<button class="btn-run" onclick="runQuery()">
<svg width="9" height="11" viewBox="0 0 10 12" fill="currentColor"><polygon points="0,0 10,6 0,12"/></svg>
Run ⌃↵
</button>
</div>
</div>
<div class="editor-inner">
<div class="line-nums" id="lineNums"></div>
<textarea id="editor" spellcheck="false" autocomplete="off" placeholder="-- Write SQL here… -- Ctrl+Enter to run | Toggle EXPLAIN for execution plan"></textarea>
</div>
</div>
<!-- RESULTS -->
<div class="results-zone">
<div class="results-tabs">
<button class="rtab active" id="rtab-results" onclick="switchResultTab('results',this)">Results</button>
<button class="rtab" id="rtab-explain" onclick="switchResultTab('explain',this)">Explain Plan</button>
<button class="rtab" id="rtab-performance" onclick="switchResultTab('performance',this)">Performance</button>
<button class="rtab" id="rtab-messages" onclick="switchResultTab('messages',this)">Messages</button>
<button class="rtab" id="rtab-history" onclick="switchResultTab('history',this)">History</button>
</div>
<div class="results-meta">
<div class="rm-item">Status: <span class="rm-val rm-muted" id="statusTxt">ready</span></div>
<div class="rm-item">Rows: <span class="rm-val" id="rowsTxt">—</span></div>
<div class="rm-item">Time: <span class="rm-val" id="timeTxt">—</span></div>
<div class="rm-item" id="txStatus" style="display:none">TX: <span class="rm-val" id="txStatusTxt" style="color:var(--yellow)">active</span></div>
</div>
<div class="results-content" id="resultsContent">
<div class="empty-results">
<div class="empty-icon">SELECT</div>
<div class="empty-text">Run a query to see results<br><span style="color:var(--text3)">Ctrl+Enter · Toggle Explain for query plans</span></div>
</div>
</div>
</div>
<!-- LESSON DETAIL -->
<div class="lesson-detail" id="lessonDetail">
<button class="ld-close" onclick="closeLessonDetail()">✕</button>
<div class="ld-title" id="ldTitle"></div>
<div class="ld-desc" id="ldDesc"></div>
<div class="ld-examples" id="ldExamples"></div>
</div>
</div>
</div>
<!-- ── STATUS BAR ── -->
<div class="statusbar">
<div class="sb">MySQL Simulator Pro</div>
<div class="sb sb-sep">|</div>
<div class="sb" id="sbSection">CREATE & DROP</div>
<div class="sb sb-sep">|</div>
<div class="sb" id="sbTableCount">7 tables</div>
<div class="sb sb-sep">|</div>
<div class="sb" id="sbIndexCount">0 indexes</div>
<div class="sb sb-sep">|</div>
<div class="sb sb-tx" id="sbTx">NO TX</div>
<div class="sb sb-r" id="sbUser">user: root</div>
</div>
<!-- ══════════════════ MODALS ══════════════════ -->
<!-- DATA IMPORT -->
<div class="modal-backdrop" id="dataModal">
<div class="modal">
<div class="modal-header">
<svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="var(--cyan)" stroke-width="2.2"><path d="M21 15v4a2 2 0 01-2 2H5a2 2 0 01-2-2v-4M7 10l5 5 5-5M12 15V3"/></svg>
<div class="modal-title" style="color:var(--cyan)">Import Data</div>
<button class="modal-close" onclick="closeDataModal()">✕</button>
</div>
<div class="modal-body">
<div style="font-family:var(--mono);font-size:.6rem;letter-spacing:.1em;text-transform:uppercase;color:var(--text3);margin-bottom:8px;">Sample Datasets</div>
<div class="datasets-grid" id="datasetsGrid"></div>
<div class="modal-divider">or upload csv / json</div>
<div class="upload-drop-zone" id="dropZone">
<input type="file" id="csvFileInput" accept=".csv,.tsv,.txt,.json" onchange="handleFileSelect(event)">
<div class="udz-icon">📂</div>
<div class="udz-title">Drop file here</div>
<div class="udz-sub">.csv .tsv .txt · <span>or exported .json schema</span></div>
</div>
<div class="modal-field" id="tableNameField" style="display:none">
<label class="modal-label">Table Name</label>
<input class="modal-input" id="csvTableName" type="text" placeholder="MY_TABLE" oninput="this.value=this.value.toUpperCase().replace(/\s/g,'_')">
</div>
<div class="modal-preview" id="csvPreview"></div>
</div>
<div class="modal-actions">
<button class="btn-cancel" onclick="closeDataModal()">Cancel</button>
<button class="btn-primary" id="importBtn" onclick="importCSV()" disabled>Import</button>
</div>
</div>
</div>
<!-- SCHEMA BUILDER -->
<div class="modal-backdrop" id="schemaBuilderModal">
<div class="modal wide">
<div class="modal-header">
<svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="var(--purple)" stroke-width="2.2"><rect x="3" y="3" width="7" height="7"/><rect x="14" y="3" width="7" height="7"/><rect x="14" y="14" width="7" height="7"/><rect x="3" y="14" width="7" height="7"/></svg>
<div class="modal-title" style="color:var(--purple)">Schema Builder</div>
<button class="modal-close" onclick="closeSchemaBuilder()">✕</button>
</div>
<div class="modal-body">
<div class="modal-field">
<label class="modal-label">Table Name</label>
<input class="modal-input" id="sbTableName" type="text" placeholder="MY_TABLE" oninput="this.value=this.value.toUpperCase().replace(/\s/g,'_');updateSchemaPreview()">
</div>
<div class="modal-field">
<label class="modal-label">Columns</label>
<div class="sb-header-row">
<div>Name</div><div>Type</div>
<div style="text-align:center">PK</div>
<div style="text-align:center">NN</div>
<div style="text-align:center">UQ</div>
<div></div>
</div>
<div id="sbColList"></div>
<button class="sb-add-btn" onclick="addSchemaCol()">+ Add Column</button>
</div>
<label class="modal-label" style="margin-bottom:6px">Generated SQL</label>
<div class="sb-preview" id="sbPreview">-- Add columns above to preview SQL</div>
</div>
<div class="modal-actions">
<button class="btn-cancel" onclick="closeSchemaBuilder()">Cancel</button>
<button class="btn-primary purple" onclick="executeSchemaBuilder()">Create Table</button>
</div>
</div>
</div>
<!-- SECURITY MANAGER -->
<div class="modal-backdrop" id="securityModal">
<div class="modal wide">
<div class="modal-header">
<span style="font-size:1.1rem">🔐</span>
<div class="modal-title" style="color:var(--purple)">Security & RBAC</div>
<button class="modal-close" onclick="closeSecurityModal()">✕</button>
</div>
<div class="modal-body" id="securityModalBody"></div>
<div class="modal-actions">
<button class="btn-cancel" onclick="closeSecurityModal()">Close</button>
</div>
</div>
</div>
<script>
'use strict';
// ═══════════════════════════════════════════════════════════════════
// CORE STATE
// ═══════════════════════════════════════════════════════════════════
const DB = {}; // { TABLE: { cols, rows, isCSV } }
const INDEXES = {}; // { TABLE: [ {name, cols, unique} ] }
let queryHistory = [];
let msgLog = [];
let lastRes = null;
let activeResultTab = 'results';
let explainMode = false;
let lastExplainPlan = null;
let lastPerfData = null;
// ── TRANSACTIONS ──
let txActive = false;
let txSnapshot = null;
let txSavepoints = {};
let txLog = [];
// ── RBAC ──
const USERS = {
root: { password:'', roles:['admin'], isBuiltin:true },
analyst: { password:'analyst123', roles:['analyst'], isBuiltin:false },
viewer: { password:'view123', roles:['readonly'], isBuiltin:false }
};
const ROLES = {
admin: { grants:{ '*':['SELECT','INSERT','UPDATE','DELETE','CREATE','DROP','ALTER','INDEX'] } },
analyst: { grants:{ '*':['SELECT','INSERT','UPDATE'] } },
readonly: { grants:{ '*':['SELECT'] } }
};
let currentUser = 'root';
function hasPermission(op, table='*') {
const user = USERS[currentUser];
if (!user) return false;
for (const roleName of user.roles) {
const role = ROLES[roleName];
if (!role) continue;
const grants = role.grants[table] || role.grants['*'] || [];
if (grants.includes(op) || grants.includes('ALL')) return true;
}
return false;
}
function requirePermission(op, table='*') {
if (!hasPermission(op, table))
throw new Error(`Access denied for user '${currentUser}' — missing ${op} privilege on ${table}`);
}
// ─── Deep clone ───────────────────────────────────────────────────
function deepClone(obj) { return JSON.parse(JSON.stringify(obj)); }
// ─── Helpers ──────────────────────────────────────────────────────
function esc(s){ return String(s).replace(/&/g,'&').replace(/</g,'<').replace(/>/g,'>').replace(/"/g,'"'); }
function getTable(name){
const k=Object.keys(DB).find(k=>k.toUpperCase()===name.toUpperCase());
if(!k) throw new Error(`Table \`${name}\` doesn't exist`);
return DB[k];
}
function getTableName(name){
return Object.keys(DB).find(k=>k.toUpperCase()===name.toUpperCase());
}
function findKey(obj,col){
return Object.keys(obj).find(k=>k.toUpperCase()===col.toUpperCase())||null;
}
// ═══════════════════════════════════════════════════════════════════
// INIT DB
// ═══════════════════════════════════════════════════════════════════
function initDB(){
ct('COUNTRY',[{n:'ID',t:'INT',pk:1},{n:'CCODE',t:'CHAR(2)'},{n:'NAME',t:'VARCHAR(60)'}]);
ir('COUNTRY',[
{ID:1,CCODE:'US',NAME:'United States'},{ID:2,CCODE:'CA',NAME:'Canada'},
{ID:3,CCODE:'MX',NAME:'Mexico'},{ID:4,CCODE:'GB',NAME:'United Kingdom'},
{ID:5,CCODE:'FR',NAME:'France'},{ID:6,CCODE:'DE',NAME:'Germany'},{ID:7,CCODE:'JP',NAME:'Japan'}
]);
ct('CUSTOMERS',[
{n:'customer_id',t:'INT',pk:1},{n:'first_name',t:'VARCHAR(50)',nn:1},{n:'last_name',t:'VARCHAR(50)',nn:1},
{n:'email',t:'VARCHAR(100)',uq:1},{n:'country',t:'CHAR(2)',fk:'COUNTRY.CCODE'}
]);
ir('CUSTOMERS',[
{customer_id:1,first_name:'Alice',last_name:'Johnson',email:'alice@example.com',country:'US'},
{customer_id:2,first_name:'Bob',last_name:'Smith',email:'bob@example.com',country:'CA'},
{customer_id:3,first_name:'Carlos',last_name:'Rivera',email:'carlos@example.com',country:'MX'},
{customer_id:4,first_name:'Diana',last_name:'White',email:'diana@example.com',country:'GB'},
{customer_id:5,first_name:'Eva',last_name:'Müller',email:'eva@example.com',country:'DE'},
{customer_id:6,first_name:'Frank',last_name:'Brown',email:'frank@example.com',country:'US'},
{customer_id:7,first_name:'Grace',last_name:'Lee',email:'grace@example.com',country:'JP'},
{customer_id:8,first_name:'Hank',last_name:'Harris',email:'hank@example.com',country:'US'}
]);
ct('ORDERS',[
{n:'order_id',t:'INT',pk:1},{n:'customer_id',t:'INT',fk:'CUSTOMERS.customer_id'},
{n:'order_date',t:'DATE'},{n:'total_amount',t:'DECIMAL(10,2)'},{n:'status',t:'VARCHAR(20)'}
]);
ir('ORDERS',[
{order_id:101,customer_id:1,order_date:'2024-01-10',total_amount:249.99,status:'shipped'},
{order_id:102,customer_id:2,order_date:'2024-01-15',total_amount:89.50,status:'delivered'},
{order_id:103,customer_id:1,order_date:'2024-02-01',total_amount:425.00,status:'processing'},
{order_id:104,customer_id:4,order_date:'2024-02-14',total_amount:39.99,status:'delivered'},
{order_id:105,customer_id:6,order_date:'2024-02-20',total_amount:179.00,status:'shipped'},
{order_id:106,customer_id:3,order_date:'2024-03-05',total_amount:550.75,status:'delivered'},
{order_id:107,customer_id:8,order_date:'2024-03-10',total_amount:99.00,status:'processing'},
{order_id:108,customer_id:6,order_date:'2024-03-18',total_amount:310.00,status:'shipped'}
]);
ct('PRODUCTS',[
{n:'product_id',t:'INT',pk:1},{n:'product_name',t:'VARCHAR(100)',nn:1},
{n:'price',t:'DECIMAL(10,2)'},{n:'stock_qty',t:'INT'},{n:'category',t:'VARCHAR(50)'}
]);
ir('PRODUCTS',[
{product_id:1,product_name:'Laptop Pro 15"',price:1299.99,stock_qty:24,category:'Electronics'},
{product_id:2,product_name:'Wireless Mouse',price:29.99,stock_qty:150,category:'Electronics'},
{product_id:3,product_name:'Mechanical Keyboard',price:89.99,stock_qty:75,category:'Electronics'},
{product_id:4,product_name:'USB-C Hub',price:49.99,stock_qty:60,category:'Accessories'},
{product_id:5,product_name:'Monitor 27"',price:399.99,stock_qty:18,category:'Electronics'},
{product_id:6,product_name:'Desk Mat XL',price:39.99,stock_qty:90,category:'Accessories'},
{product_id:7,product_name:'Webcam HD',price:79.99,stock_qty:45,category:'Electronics'}
]);
ct('ORDER_ITEMS',[
{n:'item_id',t:'INT',pk:1},{n:'order_id',t:'INT',fk:'ORDERS.order_id'},
{n:'product_id',t:'INT',fk:'PRODUCTS.product_id'},{n:'quantity',t:'INT'},{n:'unit_price',t:'DECIMAL(10,2)'}
]);
ir('ORDER_ITEMS',[
{item_id:1,order_id:101,product_id:1,quantity:1,unit_price:1299.99},
{item_id:2,order_id:101,product_id:2,quantity:2,unit_price:29.99},
{item_id:3,order_id:102,product_id:3,quantity:1,unit_price:89.50},
{item_id:4,order_id:103,product_id:5,quantity:1,unit_price:399.99},
{item_id:5,order_id:104,product_id:6,quantity:1,unit_price:39.99},
{item_id:6,order_id:105,product_id:2,quantity:3,unit_price:29.99},
{item_id:7,order_id:106,product_id:4,quantity:2,unit_price:49.99},
{item_id:8,order_id:107,product_id:7,quantity:1,unit_price:79.99}
]);
ct('CHICAGO_SCHOOLS',[
{n:'school_id',t:'INT',pk:1},{n:'school_name',t:'VARCHAR(100)'},
{n:'community_area',t:'VARCHAR(60)'},{n:'safety_score',t:'INT'},{n:'graduation_rate_pct',t:'DECIMAL(5,1)'}
]);
ir('CHICAGO_SCHOOLS',[
{school_id:1,school_name:'Lincoln Elementary',community_area:'Lincoln Square',safety_score:78,graduation_rate_pct:89.2},
{school_id:2,school_name:'Hyde Park Academy',community_area:'Hyde Park',safety_score:65,graduation_rate_pct:72.4},
{school_id:3,school_name:'Westinghouse College',community_area:'East Garfield Park',safety_score:55,graduation_rate_pct:68.1},
{school_id:4,school_name:'Lane Tech HS',community_area:'Avondale',safety_score:88,graduation_rate_pct:94.3},
{school_id:5,school_name:'South Shore Int.',community_area:'South Shore',safety_score:48,graduation_rate_pct:61.0},
{school_id:6,school_name:'Northside College',community_area:'Edgewater',safety_score:82,graduation_rate_pct:91.7},
{school_id:7,school_name:'Dunbar HS',community_area:'Douglas',safety_score:52,graduation_rate_pct:65.5},
{school_id:8,school_name:'Walter Payton HS',community_area:'Near North Side',safety_score:94,graduation_rate_pct:97.1}
]);
ct('CHICAGO_SOCIOECONOMIC',[
{n:'community_area',t:'VARCHAR(60)'},{n:'area_number',t:'INT'},
{n:'pct_housing_crowd',t:'DECIMAL(5,2)'},{n:'per_capita_income',t:'INT'},{n:'pct_below_poverty',t:'DECIMAL(5,2)'}
]);
ir('CHICAGO_SOCIOECONOMIC',[
{community_area:'Lincoln Square',area_number:4,pct_housing_crowd:3.8,per_capita_income:35000,pct_below_poverty:12.1},
{community_area:'Hyde Park',area_number:41,pct_housing_crowd:3.1,per_capita_income:38500,pct_below_poverty:14.3},
{community_area:'East Garfield Park',area_number:27,pct_housing_crowd:9.2,per_capita_income:15200,pct_below_poverty:42.1},
{community_area:'Avondale',area_number:21,pct_housing_crowd:7.1,per_capita_income:22400,pct_below_poverty:28.7},
{community_area:'South Shore',area_number:43,pct_housing_crowd:8.8,per_capita_income:18900,pct_below_poverty:36.2},
{community_area:'Edgewater',area_number:77,pct_housing_crowd:4.2,per_capita_income:32100,pct_below_poverty:18.5},
{community_area:'Douglas',area_number:35,pct_housing_crowd:11.4,per_capita_income:14400,pct_below_poverty:46.3},
{community_area:'Near North Side',area_number:8,pct_housing_crowd:1.9,per_capita_income:72500,pct_below_poverty:7.4}
]);
}
function ct(name,cols,isCSV=false){
DB[name]={cols:cols.map(c=>({name:c.n,type:c.t,pk:!!c.pk,fk:c.fk||null,notnull:!!c.nn,unique:!!c.uq,csv:!!isCSV})),rows:[],isCSV};
if(!INDEXES[name]) INDEXES[name]=[];
}
function ir(name,rows){ getTable(name).rows.push(...rows.map(r=>({...r}))); }
// ═══════════════════════════════════════════════════════════════════
// SQL EXECUTOR
// ═══════════════════════════════════════════════════════════════════
function runQuery(){
const sql=document.getElementById('editor').value.trim();
if(!sql) return;
const statements=splitStatements(sql);
const t0=performance.now();
let lastResult=null;
for(const stmt of statements){
const s=stmt.trim();
if(!s) continue;
lastResult=executeStatement(s);
}
const elapsed=(performance.now()-t0).toFixed(2);
document.getElementById('timeTxt').textContent=elapsed+'ms';
queryHistory.unshift({sql:sql.substring(0,140),time:elapsed,ts:new Date().toLocaleTimeString(),ok:lastResult?.ok});
if(lastResult) showResult(lastResult,elapsed,sql);
}
function splitStatements(sql){
const stmts=[];let cur='',inStr=false,strChar='';
for(let i=0;i<sql.length;i++){
const c=sql[i];
if(inStr){cur+=c;if(c===strChar&&sql[i-1]!=='\\')inStr=false;}
else if(c==="'"||c==='"'){inStr=true;strChar=c;cur+=c;}
else if(c===';'){stmts.push(cur.trim());cur='';}
else cur+=c;
}
if(cur.trim())stmts.push(cur.trim());
return stmts;
}
function executeStatement(sql){
const su=sql.trim().replace(/\s+/g,' ');
const up=su.toUpperCase();
try {
// ── TRANSACTION ──
if(/^BEGIN(?:\s+WORK)?$/i.test(up)||/^START\s+TRANSACTION$/i.test(up)) return execBegin();
if(/^COMMIT(?:\s+WORK)?$/i.test(up)) return execCommit();
if(/^ROLLBACK(?:\s+WORK)?$/i.test(up)&&!/ROLLBACK\s+TO/i.test(up)) return execRollback();
if(/^SAVEPOINT\s+/i.test(up)) return execSavepoint(su);
if(/^ROLLBACK\s+TO(?:\s+SAVEPOINT)?\s+/i.test(up)) return execRollbackTo(su);
if(/^RELEASE\s+SAVEPOINT\s+/i.test(up)) return execReleaseSavepoint(su);
// ── RBAC ──
if(/^CREATE\s+USER\s+/i.test(up)) return execCreateUser(su);
if(/^CREATE\s+ROLE\s+/i.test(up)) return execCreateRole(su);
if(/^GRANT\s+/i.test(up)) return execGrant(su);
if(/^REVOKE\s+/i.test(up)) return execRevoke(su);
if(/^DROP\s+USER\s+/i.test(up)) return execDropUser(su);
if(/^DROP\s+ROLE\s+/i.test(up)) return execDropRole(su);
if(/^SET\s+ROLE\s+/i.test(up)) return execSetRole(su);
if(/^SHOW\s+USERS$/i.test(up)) return execShowUsers();
if(/^SHOW\s+ROLES$/i.test(up)) return execShowRoles();
if(/^SHOW\s+GRANTS(?:\s+FOR\s+)?/i.test(up)) return execShowGrants(su);
// ── INDEXES ──
if(/^CREATE\s+(?:UNIQUE\s+)?INDEX\s+/i.test(up)) return execCreateIndex(su);
if(/^DROP\s+INDEX\s+/i.test(up)) return execDropIndex(su);
if(/^SHOW\s+(?:INDEX|INDEXES|KEYS)\s+(?:FROM|IN)\s+/i.test(up)) return execShowIndexes(su);
// ── DDL/DML ──
if(/^SHOW\s+TABLES/i.test(up)) return execShowTables();
if(/^(?:DESC|DESCRIBE)\s+/i.test(up)) return execDescribe(su);
if(/^EXPLAIN\s+/i.test(up)){ const inner=su.replace(/^EXPLAIN\s+/i,''); const plan=buildExplainPlan(inner); return {type:'explain',plan,ok:true,msg:'Execution plan generated'}; }
if(/^SELECT\s/i.test(up)){ requirePermission('SELECT'); return execSelect(su); }
if(/^INSERT\s+INTO\s/i.test(up)){ requirePermission('INSERT'); return execInsert(su); }
if(/^UPDATE\s/i.test(up)){ requirePermission('UPDATE'); return execUpdate(su); }
if(/^DELETE\s+FROM\s/i.test(up)){ requirePermission('DELETE'); return execDelete(su); }
if(/^CREATE\s+TABLE\s/i.test(up)){ requirePermission('CREATE'); return execCreate(su); }
if(/^DROP\s+TABLE\s/i.test(up)){ requirePermission('DROP'); return execDrop(su); }
if(/^TRUNCATE\s/i.test(up)){ requirePermission('DELETE'); return execTruncate(su); }
if(/^ALTER\s+TABLE\s/i.test(up)){ requirePermission('ALTER'); return execAlter(su); }
if(/^ANALYZE\s+TABLE\s+/i.test(up)) return execAnalyze(su);
return analyzeError(su);
} catch(e){
return {type:'msg',msg:e.message,ok:false,hint:generateErrorHint(su,e.message)};
}
}
// ═══════════════════════════════════════════════════════════════════
// TRANSACTION COMMANDS
// ═══════════════════════════════════════════════════════════════════
function execBegin(){
if(txActive) return {type:'msg',msg:'Warning: There is already an active transaction. COMMIT or ROLLBACK first.',ok:false};
txSnapshot=deepClone({DB:DB,idxs:INDEXES});
txActive=true;txSavepoints={};txLog=[];
updateTxUI();
return {type:'msg',msg:'Transaction started (BEGIN). Changes will be held until COMMIT or ROLLBACK.',ok:true};
}
function execCommit(){
if(!txActive) return {type:'msg',msg:'No active transaction to commit.',ok:false};
txSnapshot=null;txActive=false;txSavepoints={};
const n=txLog.length;txLog=[];
updateTxUI();
return {type:'msg',msg:`Transaction committed. ${n} statement(s) permanently saved.`,ok:true};
}
function execRollback(){
if(!txActive) return {type:'msg',msg:'No active transaction to rollback.',ok:false};
// Restore DB
const snap=txSnapshot;
Object.keys(DB).forEach(k=>delete DB[k]);
Object.assign(DB,deepClone(snap.DB));
Object.keys(INDEXES).forEach(k=>delete INDEXES[k]);
Object.assign(INDEXES,deepClone(snap.idxs));
txSnapshot=null;txActive=false;txSavepoints={};
const n=txLog.length;txLog=[];
renderSchema();renderIndexPanel();updateTxUI();
return {type:'msg',msg:`Transaction rolled back. ${n} statement(s) undone.`,ok:true,warn:true};
}
function execSavepoint(sql){
if(!txActive) return {type:'msg',msg:'No active transaction. Use BEGIN first.',ok:false};
const m=sql.match(/^SAVEPOINT\s+(\w+)/i);
if(!m) throw new Error('Invalid SAVEPOINT syntax');
const name=m[1];
txSavepoints[name]={DB:deepClone(DB),idxs:deepClone(INDEXES),logLen:txLog.length};
return {type:'msg',msg:`Savepoint \`${name}\` created.`,ok:true};
}
function execRollbackTo(sql){
if(!txActive) return {type:'msg',msg:'No active transaction.',ok:false};
const m=sql.match(/^ROLLBACK\s+TO(?:\s+SAVEPOINT)?\s+(\w+)/i);
if(!m) throw new Error('Invalid ROLLBACK TO syntax');
const name=m[1];
const sp=txSavepoints[name];
if(!sp) throw new Error(`Savepoint \`${name}\` not found`);
Object.keys(DB).forEach(k=>delete DB[k]);
Object.assign(DB,deepClone(sp.DB));
Object.keys(INDEXES).forEach(k=>delete INDEXES[k]);
Object.assign(INDEXES,deepClone(sp.idxs));
txLog=txLog.slice(0,sp.logLen);
renderSchema();renderIndexPanel();
return {type:'msg',msg:`Rolled back to savepoint \`${name}\`.`,ok:true,warn:true};
}
function execReleaseSavepoint(sql){
const m=sql.match(/^RELEASE\s+SAVEPOINT\s+(\w+)/i);
if(!m) throw new Error('Invalid RELEASE SAVEPOINT syntax');
const name=m[1];
delete txSavepoints[name];
return {type:'msg',msg:`Savepoint \`${name}\` released.`,ok:true};
}
function updateTxUI(){
const badge=document.getElementById('txBadge');
const sbTx=document.getElementById('sbTx');
const txStatus=document.getElementById('txStatus');
if(txActive){
badge.style.display='';badge.className='hdr-badge tx-active';badge.textContent='⚡ TX';
sbTx.className='sb sb-tx active';sbTx.textContent='TX ACTIVE';
txStatus.style.display='';
} else {
badge.style.display='none';
sbTx.className='sb sb-tx';sbTx.textContent='NO TX';
txStatus.style.display='none';
}
}
// ═══════════════════════════════════════════════════════════════════
// RBAC COMMANDS
// ═══════════════════════════════════════════════════════════════════
function execCreateUser(sql){
requirePermission('CREATE');
const m=sql.match(/CREATE\s+USER\s+'?(\w+)'?(?:@\S+)?\s+IDENTIFIED\s+BY\s+'([^']*)'/i);
if(!m) throw new Error("Syntax: CREATE USER 'name' IDENTIFIED BY 'password'");
const [,name,pass]=m;
if(USERS[name]) throw new Error(`User '${name}' already exists`);
USERS[name]={password:pass,roles:[],isBuiltin:false};
renderSecPanel();
return {type:'msg',msg:`User '${name}' created. Use GRANT to assign roles/privileges.`,ok:true};
}
function execCreateRole(sql){
requirePermission('CREATE');
const m=sql.match(/CREATE\s+ROLE\s+'?(\w+)'?/i);
if(!m) throw new Error("Syntax: CREATE ROLE role_name");
const name=m[1];
if(ROLES[name]) throw new Error(`Role '${name}' already exists`);
ROLES[name]={grants:{}};
renderSecPanel();
return {type:'msg',msg:`Role '${name}' created. Use GRANT … TO '${name}' to add privileges.`,ok:true};
}
function execGrant(sql){
requirePermission('CREATE');
// GRANT role TO user
const roleM=sql.match(/GRANT\s+(\w+)\s+TO\s+'?(\w+)'?/i);
if(roleM&&!roleM[1].match(/^SELECT|INSERT|UPDATE|DELETE|ALL|CREATE|DROP|ALTER|INDEX$/i)){
const [,roleName,userName]=roleM;
if(!ROLES[roleName]) throw new Error(`Role '${roleName}' doesn't exist`);
if(!USERS[userName]) throw new Error(`User '${userName}' doesn't exist`);
if(!USERS[userName].roles.includes(roleName)) USERS[userName].roles.push(roleName);
renderSecPanel();
return {type:'msg',msg:`Role '${roleName}' granted to user '${userName}'.`,ok:true};
}
// GRANT privilege ON table TO role/user
const privM=sql.match(/GRANT\s+(.+?)\s+ON\s+(\w+|\*)\s+TO\s+'?(\w+)'?/i);
if(!privM) throw new Error("Syntax: GRANT priv ON table TO user/role or GRANT role TO user");
const [,privStr,tbl,target]=privM;
const privs=privStr.split(',').map(p=>p.trim().toUpperCase());
const tableKey=tbl==='*'?'*':tbl.toUpperCase();
if(ROLES[target]){
if(!ROLES[target].grants[tableKey]) ROLES[target].grants[tableKey]=[];
privs.forEach(p=>{ if(!ROLES[target].grants[tableKey].includes(p)) ROLES[target].grants[tableKey].push(p); });
renderSecPanel();
return {type:'msg',msg:`Granted ${privs.join(', ')} on ${tableKey} to role '${target}'.`,ok:true};
} else if(USERS[target]){
// Add temp role
const rname=`__user_${target}`;
if(!ROLES[rname]) ROLES[rname]={grants:{}};
if(!ROLES[rname].grants[tableKey]) ROLES[rname].grants[tableKey]=[];
privs.forEach(p=>{ if(!ROLES[rname].grants[tableKey].includes(p)) ROLES[rname].grants[tableKey].push(p); });
if(!USERS[target].roles.includes(rname)) USERS[target].roles.push(rname);
renderSecPanel();
return {type:'msg',msg:`Granted ${privs.join(', ')} on ${tableKey} to user '${target}'.`,ok:true};
}
throw new Error(`User or role '${target}' not found`);
}
function execRevoke(sql){
requirePermission('CREATE');
const m=sql.match(/REVOKE\s+(.+?)\s+ON\s+(\w+|\*)\s+FROM\s+'?(\w+)'?/i);
if(!m) throw new Error("Syntax: REVOKE priv ON table FROM user/role");
const [,privStr,tbl,target]=m;
const privs=privStr.split(',').map(p=>p.trim().toUpperCase());
const tableKey=tbl==='*'?'*':tbl.toUpperCase();
const role=ROLES[target];
if(role&&role.grants[tableKey]){
role.grants[tableKey]=role.grants[tableKey].filter(p=>!privs.includes(p));
renderSecPanel();
return {type:'msg',msg:`Revoked ${privs.join(', ')} on ${tableKey} from '${target}'.`,ok:true,warn:true};
}
return {type:'msg',msg:`No matching grants found for '${target}'.`,ok:false};
}