diff --git a/internal-packages/tsql/package.json b/internal-packages/tsql/package.json
index 5ebf1f130..7baf40726 100644
--- a/internal-packages/tsql/package.json
+++ b/internal-packages/tsql/package.json
@@ -6,8 +6,10 @@
   "types": "./src/index.ts",
   "type": "module",
   "dependencies": {
+    "@internal/clickhouse": "workspace:*",
     "@trigger.dev/core": "workspace:*",
-    "antlr4ts": "0.5.0-alpha.4"
+    "antlr4ts": "0.5.0-alpha.4",
+    "zod": "3.25.76"
   },
   "scripts": {
     "typecheck": "tsc --noEmit",
diff --git a/internal-packages/tsql/src/index.ts b/internal-packages/tsql/src/index.ts
index 6580918fb..bcb0476b3 100644
--- a/internal-packages/tsql/src/index.ts
+++ b/internal-packages/tsql/src/index.ts
@@ -1 +1,4 @@
 import { Logger } from "@trigger.dev/core/logger";
+
+export { TQuery } from "./query/TQuery.js";
+export type { TQueryOptions } from "./query/TQuery.js";
diff --git a/internal-packages/tsql/src/query/ClickHouseQueryVisitor.ts b/internal-packages/tsql/src/query/ClickHouseQueryVisitor.ts
new file mode 100644
index 000000000..d4749315b
--- /dev/null
+++ b/internal-packages/tsql/src/query/ClickHouseQueryVisitor.ts
@@ -0,0 +1,314 @@
+import { ParserRuleContext } from "antlr4ts/ParserRuleContext";
+import { ErrorNode } from "antlr4ts/tree/ErrorNode";
+import { ParseTree } from "antlr4ts/tree/ParseTree";
+import { TerminalNode } from "antlr4ts/tree/TerminalNode";
+import {
+  ArrayJoinClauseContext,
+  ColumnExprContext,
+  ColumnExprListContext,
+  FromClauseContext,
+  GroupByClauseContext,
+  HavingClauseContext,
+  JoinExprContext,
+  LimitAndOffsetClauseContext,
+  LimitByClauseContext,
+  OffsetOnlyClauseContext,
+  OrderByClauseContext,
+  PlaceholderContext,
+  PrewhereClauseContext,
+  SelectContext,
+  SelectSetStmtContext,
+  SelectStmtContext,
+  SelectStmtWithParensContext,
+  SettingsClauseContext,
+  TopClauseContext,
+  WhereClauseContext,
+  WindowClauseContext,
+  WithClauseContext,
+} from "../grammar/TSQLParser.js";
+import { TSQLParserVisitor } from "../grammar/TSQLParserVisitor.js";
+
+/**
+ * Visitor that converts TSQL AST to ClickHouse SQL
+ */
+export class ClickHouseQueryVisitor implements TSQLParserVisitor<string> {
+  visitSelect(ctx: SelectContext): string {
+    const selectSetStmt = ctx.selectSetStmt();
+    if (selectSetStmt) {
+      return this.visitSelectSetStmt(selectSetStmt);
+    }
+
+    const selectStmt = ctx.selectStmt();
+    if (selectStmt) {
+      return this.visitSelectStmt(selectStmt);
+    }
+
+    // Handle tSQLxTagElement if needed
+    return "";
+  }
+
+  visitSelectSetStmt(ctx: SelectSetStmtContext): string {
+    const selectStmtWithParens = ctx.selectStmtWithParens();
+    let query = this.visitSelectStmtWithParens(selectStmtWithParens);
+
+    // Handle subsequent select set clauses (UNION, EXCEPT, INTERSECT)
+    const subsequentClauses = ctx.subsequentSelectSetClause();
+    for (const clause of subsequentClauses) {
+      const op = clause.EXCEPT()
+        ? "EXCEPT"
+        : clause.UNION()
+        ? clause.ALL()
+          ? "UNION ALL"
+          : clause.DISTINCT()
+          ? "UNION DISTINCT"
+          : "UNION"
+        : clause.INTERSECT()
+        ? clause.DISTINCT()
+          ? "INTERSECT DISTINCT"
+          : "INTERSECT"
+        : "";
+
+      if (op) {
+        const nextSelect = clause.selectStmtWithParens();
+        query += ` ${op} ${this.visitSelectStmtWithParens(nextSelect)}`;
+      }
+    }
+
+    return query;
+  }
+
+  visitSelectStmtWithParens(ctx: SelectStmtWithParensContext): string {
+    const selectStmt = ctx.selectStmt();
+    if (selectStmt) {
+      return this.visitSelectStmt(selectStmt);
+    }
+
+    const selectSetStmt = ctx.selectSetStmt();
+    if (selectSetStmt) {
+      return `(${this.visitSelectSetStmt(selectSetStmt)})`;
+    }
+
+    // Handle placeholder if needed
+    const placeholder = ctx.placeholder();
+    if (placeholder) {
+      return this.visitPlaceholder(placeholder);
+    }
+
+    return this.getTextFromContext(ctx);
+  }
+
+  visitPlaceholder(ctx: PlaceholderContext): string {
+    return this.getTextFromContext(ctx);
+  }
+
+  visitSelectStmt(ctx: SelectStmtContext): string {
+    let parts: string[] = [];
+
+    // WITH clause
+    const withClause = ctx.withClause();
+    if (withClause) {
+      parts.push(this.visitWithClause(withClause));
+    }
+
+    // SELECT
+    parts.push("SELECT");
+
+    // DISTINCT
+    if (ctx.DISTINCT()) {
+      parts.push("DISTINCT");
+    }
+
+    // TOP clause
+    const topClause = ctx.topClause();
+    if (topClause) {
+      parts.push(this.visitTopClause(topClause));
+    }
+
+    // Column list
+    const columnExprList = ctx.columnExprList();
+    if (columnExprList) {
+      parts.push(this.visitColumnExprList(columnExprList));
+    }
+
+    // FROM clause
+    const fromClause = ctx.fromClause();
+    if (fromClause) {
+      parts.push(this.visitFromClause(fromClause));
+    }
+
+    // Array JOIN
+    const arrayJoinClause = ctx.arrayJoinClause();
+    if (arrayJoinClause) {
+      parts.push(this.visitArrayJoinClause(arrayJoinClause));
+    }
+
+    // PREWHERE
+    const prewhereClause = ctx.prewhereClause();
+    if (prewhereClause) {
+      parts.push(this.visitPrewhereClause(prewhereClause));
+    }
+
+    // WHERE
+    const whereClause = ctx.whereClause();
+    if (whereClause) {
+      parts.push(this.visitWhereClause(whereClause));
+    }
+
+    // GROUP BY
+    const groupByClause = ctx.groupByClause();
+    if (groupByClause) {
+      parts.push(this.visitGroupByClause(groupByClause));
+    }
+
+    // HAVING
+    const havingClause = ctx.havingClause();
+    if (havingClause) {
+      parts.push(this.visitHavingClause(havingClause));
+    }
+
+    // WINDOW
+    const windowClause = ctx.windowClause();
+    if (windowClause) {
+      parts.push(this.visitWindowClause(windowClause));
+    }
+
+    // ORDER BY
+    const orderByClause = ctx.orderByClause();
+    if (orderByClause) {
+      parts.push(this.visitOrderByClause(orderByClause));
+    }
+
+    // LIMIT BY
+    const limitByClause = ctx.limitByClause();
+    if (limitByClause) {
+      parts.push(this.visitLimitByClause(limitByClause));
+    }
+
+    // LIMIT / OFFSET
+    const limitAndOffsetClause = ctx.limitAndOffsetClause();
+    if (limitAndOffsetClause) {
+      parts.push(this.visitLimitAndOffsetClause(limitAndOffsetClause));
+    }
+
+    const offsetOnlyClause = ctx.offsetOnlyClause();
+    if (offsetOnlyClause) {
+      parts.push(this.visitOffsetOnlyClause(offsetOnlyClause));
+    }
+
+    // SETTINGS
+    const settingsClause = ctx.settingsClause();
+    if (settingsClause) {
+      parts.push(this.visitSettingsClause(settingsClause));
+    }
+
+    return parts.join(" ");
+  }
+
+  visitColumnExprList(ctx: ColumnExprListContext): string {
+    const exprs: string[] = [];
+    const columnExprs = ctx.columnExpr();
+    for (const expr of columnExprs) {
+      exprs.push(this.visitColumnExpr(expr));
+    }
+    return exprs.join(", ");
+  }
+
+  visitColumnExpr(ctx: ColumnExprContext): string {
+    // Use the text property which contains the original input text for this node
+    return this.getTextFromContext(ctx);
+  }
+
+  visitFromClause(ctx: FromClauseContext): string {
+    const joinExpr = ctx.joinExpr();
+    return `FROM ${this.visitJoinExpr(joinExpr)}`;
+  }
+
+  visitJoinExpr(ctx: JoinExprContext): string {
+    return this.getTextFromContext(ctx);
+  }
+
+  visitWhereClause(ctx: WhereClauseContext): string {
+    const columnExpr = ctx.columnExpr();
+    return `WHERE ${this.visitColumnExpr(columnExpr)}`;
+  }
+
+  visitGroupByClause(ctx: GroupByClauseContext): string {
+    return this.getTextFromContext(ctx);
+  }
+
+  visitHavingClause(ctx: HavingClauseContext): string {
+    return this.getTextFromContext(ctx);
+  }
+
+  visitOrderByClause(ctx: OrderByClauseContext): string {
+    return this.getTextFromContext(ctx);
+  }
+
+  visitLimitByClause(ctx: LimitByClauseContext): string {
+    return this.getTextFromContext(ctx);
+  }
+
+  visitLimitAndOffsetClause(ctx: LimitAndOffsetClauseContext): string {
+    return this.getTextFromContext(ctx);
+  }
+
+  visitOffsetOnlyClause(ctx: OffsetOnlyClauseContext): string {
+    return this.getTextFromContext(ctx);
+  }
+
+  visitSettingsClause(ctx: SettingsClauseContext): string {
+    return this.getTextFromContext(ctx);
+  }
+
+  visitWithClause(ctx: WithClauseContext): string {
+    return this.getTextFromContext(ctx);
+  }
+
+  visitTopClause(ctx: TopClauseContext): string {
+    return this.getTextFromContext(ctx);
+  }
+
+  visitArrayJoinClause(ctx: ArrayJoinClauseContext): string {
+    return this.getTextFromContext(ctx);
+  }
+
+  visitPrewhereClause(ctx: PrewhereClauseContext): string {
+    return this.getTextFromContext(ctx);
+  }
+
+  visitWindowClause(ctx: WindowClauseContext): string {
+    return this.getTextFromContext(ctx);
+  }
+
+  /**
+   * Extract the original text from a parse tree context
+   * This uses the text property which contains the original input text
+   */
+  private getTextFromContext(ctx: ParserRuleContext): string {
+    // The text property exists at runtime but may not be in types
+    return (ctx as any).text || "";
+  }
+
+  // Required by ParseTreeVisitor interface
+  visit(tree: ParseTree): string {
+    // Use the text property which contains the original input text
+    return (tree as any).text || "";
+  }
+
+  visitChildren(node: ParserRuleContext): string {
+    // Visit all children and concatenate their results
+    if (!node.children || node.children.length === 0) {
+      return this.visit(node);
+    }
+    return node.children.map((child: ParseTree) => this.visit(child)).join(" ");
+  }
+
+  // Visit terminal nodes
+  visitTerminal(node: TerminalNode): string {
+    return node.text;
+  }
+
+  visitErrorNode(node: ErrorNode): string {
+    return "";
+  }
+}
diff --git a/internal-packages/tsql/src/query/TQuery.ts b/internal-packages/tsql/src/query/TQuery.ts
new file mode 100644
index 000000000..e9900aca6
--- /dev/null
+++ b/internal-packages/tsql/src/query/TQuery.ts
@@ -0,0 +1,122 @@
+import { CharStreams, CommonTokenStream } from "antlr4ts";
+import { TSQLLexer } from "../grammar/TSQLLexer.js";
+import { TSQLParser } from "../grammar/TSQLParser.js";
+import { ClickHouseQueryVisitor } from "./ClickHouseQueryVisitor.js";
+import type { ClickHouse } from "@internal/clickhouse";
+import { z } from "zod";
+
+export interface TQueryOptions {
+  organizationId: string;
+  projectId: string;
+  environmentId: string;
+}
+
+export class TQuery {
+  private readonly organizationId: string;
+  private readonly projectId: string;
+  private readonly environmentId: string;
+  private readonly clickhouseReader: ClickHouse;
+
+  constructor(clickhouseReader: ClickHouse, options: TQueryOptions) {
+    this.clickhouseReader = clickhouseReader;
+    this.organizationId = options.organizationId;
+    this.projectId = options.projectId;
+    this.environmentId = options.environmentId;
+  }
+
+  /**
+   * Execute a TSQL query and return the results
+   * @param input TSQL query string
+   * @param schema Zod schema for the output rows
+   * @returns Promise with query results
+   */
+  async query<TOutput extends z.ZodSchema<any>>(
+    input: string,
+    schema: TOutput
+  ): Promise<[Error | null, z.output<TOutput>[] | null]> {
+    // Parse the TSQL input
+    const inputStream = CharStreams.fromString(input);
+    const lexer = new TSQLLexer(inputStream);
+    const tokenStream = new CommonTokenStream(lexer as any);
+    const parser = new TSQLParser(tokenStream);
+
+    // Parse as a SELECT statement
+    const tree = parser.select();
+
+    // Convert AST to ClickHouse SQL
+    const visitor = new ClickHouseQueryVisitor();
+    let clickhouseQuery = visitor.visit(tree);
+
+    // Add WHERE clauses for scoping
+    clickhouseQuery = this.addScopingWhereClauses(clickhouseQuery);
+
+    // Execute the query using ClickHouse client
+    const queryFunction = this.clickhouseReader.reader.query({
+      name: "tsql-query",
+      query: clickhouseQuery,
+      params: z.object({
+        organizationId: z.string(),
+        projectId: z.string(),
+        environmentId: z.string(),
+      }),
+      schema,
+    });
+
+    return await queryFunction({
+      organizationId: this.organizationId,
+      projectId: this.projectId,
+      environmentId: this.environmentId,
+    });
+  }
+
+  /**
+   * Add WHERE clauses for organization_id, project_id, and environment_id
+   * If the query already has a WHERE clause, we add AND conditions
+   */
+  private addScopingWhereClauses(query: string): string {
+    const scopingConditions = [
+      "organization_id = {organizationId: String}",
+      "project_id = {projectId: String}",
+      "environment_id = {environmentId: String}",
+    ].join(" AND ");
+
+    const upperQuery = query.toUpperCase();
+
+    // Check if query already has a WHERE clause
+    const whereIndex = upperQuery.indexOf(" WHERE ");
+    if (whereIndex !== -1) {
+      // Find the end of the WHERE clause (before GROUP BY, HAVING, ORDER BY, LIMIT, etc.)
+      const groupByIndex = upperQuery.indexOf(" GROUP BY ", whereIndex);
+      const havingIndex = upperQuery.indexOf(" HAVING ", whereIndex);
+      const orderByIndex = upperQuery.indexOf(" ORDER BY ", whereIndex);
+      const limitIndex = upperQuery.indexOf(" LIMIT ", whereIndex);
+
+      let whereEndIndex = query.length;
+      if (groupByIndex !== -1) whereEndIndex = Math.min(whereEndIndex, groupByIndex);
+      if (havingIndex !== -1) whereEndIndex = Math.min(whereEndIndex, havingIndex);
+      if (orderByIndex !== -1) whereEndIndex = Math.min(whereEndIndex, orderByIndex);
+      if (limitIndex !== -1) whereEndIndex = Math.min(whereEndIndex, limitIndex);
+
+      // Insert AND conditions before the end of WHERE clause
+      const beforeWhereEnd = query.substring(0, whereEndIndex);
+      const afterWhereEnd = query.substring(whereEndIndex);
+      return `${beforeWhereEnd} AND ${scopingConditions}${afterWhereEnd}`;
+    } else {
+      // Add WHERE clause before GROUP BY, HAVING, ORDER BY, LIMIT, etc.
+      const groupByIndex = upperQuery.indexOf(" GROUP BY ");
+      const havingIndex = upperQuery.indexOf(" HAVING ");
+      const orderByIndex = upperQuery.indexOf(" ORDER BY ");
+      const limitIndex = upperQuery.indexOf(" LIMIT ");
+
+      let insertIndex = query.length;
+      if (groupByIndex !== -1) insertIndex = Math.min(insertIndex, groupByIndex);
+      if (havingIndex !== -1) insertIndex = Math.min(insertIndex, havingIndex);
+      if (orderByIndex !== -1) insertIndex = Math.min(insertIndex, orderByIndex);
+      if (limitIndex !== -1) insertIndex = Math.min(insertIndex, limitIndex);
+
+      return `${query.substring(0, insertIndex)} WHERE ${scopingConditions}${query.substring(
+        insertIndex
+      )}`;
+    }
+  }
+}
diff --git a/internal-packages/tsql/tsconfig.json b/internal-packages/tsql/tsconfig.json
index 010433962..98c833a18 100644
--- a/internal-packages/tsql/tsconfig.json
+++ b/internal-packages/tsql/tsconfig.json
@@ -2,8 +2,8 @@
   "compilerOptions": {
     "target": "ES2019",
     "lib": ["ES2019", "DOM", "DOM.Iterable", "DOM.AsyncIterable"],
-    "module": "Node16",
-    "moduleResolution": "Node16",
+    "module": "ESNext",
+    "moduleResolution": "node",
     "moduleDetection": "force",
     "verbatimModuleSyntax": false,
     "types": ["vitest/globals"],
@@ -16,7 +16,9 @@
     "strict": true,
     "paths": {
       "@trigger.dev/core": ["../../packages/core/src/index"],
-      "@trigger.dev/core/*": ["../../packages/core/src/*"]
+      "@trigger.dev/core/*": ["../../packages/core/src/*"],
+      "@internal/clickhouse": ["../clickhouse/src/index"],
+      "@internal/clickhouse/*": ["../clickhouse/src/*"]
     }
   },
   "exclude": ["node_modules"]
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 09fcb2c67..cba37a57c 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -1297,12 +1297,18 @@ importers:
 
   internal-packages/tsql:
     dependencies:
+      '@internal/clickhouse':
+        specifier: workspace:*
+        version: link:../clickhouse
       '@trigger.dev/core':
         specifier: workspace:*
         version: link:../../packages/core
       antlr4ts:
         specifier: 0.5.0-alpha.4
         version: 0.5.0-alpha.4
+      zod:
+        specifier: 3.25.76
+        version: 3.25.76
     devDependencies:
       antlr4ts-cli:
         specifier: 0.5.0-alpha.4