diff --git a/converters/thoughtspot/src/ossie_thoughtspot/expressions/catalog.py b/converters/thoughtspot/src/ossie_thoughtspot/expressions/catalog.py
index 321321e0f..1ed33f1b6 100644
--- a/converters/thoughtspot/src/ossie_thoughtspot/expressions/catalog.py
+++ b/converters/thoughtspot/src/ossie_thoughtspot/expressions/catalog.py
@@ -1729,7 +1729,8 @@ def _split_table_row(line: str) -> list[str]:
 
     The document contains at least one cell whose code span itself contains a
     pipe character - the `||` concatenation operator, written as
-    `` `str1 || str2` `` - which a naive `str.split("|")` would shred into
+    `` `str1 \\|\\| str2` `` (GitHub-Flavored Markdown requires escaping pipes
+    even inside a code span) - which a naive `str.split("|")` would shred into
     extra empty cells. Backticks otherwise never appear as literal (non-code)
     content in this document's tables, so "toggle on backtick" is a safe,
     general rule rather than a special case for that one row.
@@ -1756,8 +1757,9 @@ def _split_table_row(line: str) -> list[str]:
 
 
 def _clean(cell: str) -> str:
-    """Strip markdown code-span backticks, leaving the underlying syntax text."""
-    return cell.replace("`", "").strip()
+    """Strip markdown code-span backticks and unescape pipes, leaving the
+    underlying syntax text."""
+    return cell.replace("`", "").replace("\\|", "|").strip()
 
 
 def _is_section_excluded(heading_stack: dict[int, str]) -> bool:
diff --git a/core-spec/expression_language.md b/core-spec/expression_language.md
index cc847e53a..92e62251c 100644
--- a/core-spec/expression_language.md
+++ b/core-spec/expression_language.md
@@ -407,7 +407,7 @@ a dialect extension.
 | Function | Syntax | Description |
 | :---- | :---- | :---- |
 | `CONCAT` | `CONCAT(str1, str2, ...)` | Concatenate strings |
-| `||` | `str1 || str2` | Concatenation operator |
+| `\|\|` | `str1 \|\| str2` | Concatenation operator |
 | `LENGTH` | `LENGTH(str)` | String length in characters |
 | `LOWER` | `LOWER(str)` | Convert to lowercase |
 | `UPPER` | `UPPER(str)` | Convert to uppercase |
@@ -673,7 +673,7 @@ expression:
 | :---- | :---- | :---- | :---- | :---- | :---- |
 | Date truncation | `DATE_TRUNC('month', d)` | `DATE_TRUNC('month', d)` | `DATE_TRUNC(d, MONTH)` | `DATE_TRUNC('month', d)` | `DATE_TRUNC('month', d)` |
 | Date add | `DATEADD(day, 7, d)` | `DATEADD(day, 7, d)` | `DATE_ADD(d, INTERVAL 7 DAY)` | `DATE_ADD(d, 7)` | `d + INTERVAL '7 days'` |
-| String concat | `CONCAT(a, b)` | `CONCAT(a, b)` | `CONCAT(a, b)` | `CONCAT(a, b)` | `a || b` |
+| String concat | `CONCAT(a, b)` | `CONCAT(a, b)` | `CONCAT(a, b)` | `CONCAT(a, b)` | `a \|\| b` |
 | Null coalesce | `COALESCE(a, b)` | `COALESCE(a, b)` or `NVL(a, b)` | `COALESCE(a, b)` or `IFNULL(a, b)` | `COALESCE(a, b)` | `COALESCE(a, b)` |
 | Current timestamp | `CURRENT_TIMESTAMP` | `CURRENT_TIMESTAMP()` | `CURRENT_TIMESTAMP()` | `CURRENT_TIMESTAMP()` | `CURRENT_TIMESTAMP` |
 | Substring | `SUBSTRING(s, start, len)` | `SUBSTR(s, start, len)` | `SUBSTR(s, start, len)` | `SUBSTRING(s, start, len)` | `SUBSTRING(s, start, len)` |