table name

web/locales/cs/main.ftl

@@ -853,6 +853,8 @@ error-identifier-underscore = { $label } nesmí začínat podtržítkem.
 error-identifier-number = { $label } nesmí začínat číslicí.
 error-identifier-too-long = { $label } nesmí být delší než { $limit } znaků.
 error-identifier-charset = { $label } může obsahovat jen malá písmena, číslice a podtržítko.
+error-table-name-charset = { $label } může obsahovat jen ASCII písmena, číslice, podtržítka a pomlčky.
+error-table-name-boundary = { $label } musí začínat a končit písmenem nebo číslicí.
 error-alias-charset = { $label } musí obsahovat písmeno, číslo, interpunkci nebo symbol mimo emoji a nesmí obsahovat řídicí znaky.
 error-alias-too-long = { $label } nesmí být delší než { $limit } bajtů UTF-8.
 error-identifier-reserved = { $label } používá vyhrazený název.

web/locales/en/main.ftl

@@ -838,6 +838,8 @@ error-identifier-underscore = { $label } cannot start with an underscore.
 error-identifier-number = { $label } cannot start with a number.
 error-identifier-too-long = { $label } cannot be longer than { $limit } characters.
 error-identifier-charset = { $label } may only use lowercase letters, digits and underscores.
+error-table-name-charset = { $label } may only use ASCII letters, digits, underscores and hyphens.
+error-table-name-boundary = { $label } must start and end with a letter or number.
 error-alias-charset = { $label } must contain a letter, number, punctuation mark or non-emoji symbol, and cannot contain control characters.
 error-alias-too-long = { $label } cannot be longer than { $limit } UTF-8 bytes.
 error-identifier-reserved = { $label } uses a reserved name.

web/locales/sk/main.ftl

@@ -851,6 +851,8 @@ error-identifier-underscore = { $label } nesmie začínať podčiarkovníkom.
 error-identifier-number = { $label } nesmie začínať číslom.
 error-identifier-too-long = { $label } nesmie byť dlhšie ako { $limit } znakov.
 error-identifier-charset = { $label } môže obsahovať len malé písmená, číslice a podčiarkovník.
+error-table-name-charset = { $label } môže obsahovať len ASCII písmená, číslice, podčiarkovníky a pomlčky.
+error-table-name-boundary = { $label } musí začínať a končiť písmenom alebo číslicou.
 error-alias-charset = { $label } musí obsahovať písmeno, číslo, interpunkciu alebo symbol mimo emoji a nesmie obsahovať riadiace znaky.
 error-alias-too-long = { $label } nesmie byť dlhšie ako { $limit } bajtov UTF-8.
 error-identifier-reserved = { $label } používa vyhradený názov.

web/src/pages/add_table/draft.rs

@@ -224,7 +224,10 @@ impl TableDraft {
     ) {
         self.relation_table_options = options
             .into_iter()
-            .filter(|option| option.name != self.table_name)
+            .filter(|option| {
+                common::alias::canonical_table_name(&option.name)
+                    != common::alias::canonical_table_name(&self.table_name)
+            })
             .collect();
         self.relation_tables = self
             .relation_table_options
@@ -399,7 +402,10 @@ impl TableDraft {
             && self
                 .existing_profile_tables
                 .iter()
-                .any(|name| name == &self.table_name)
+                .any(|name| {
+                    common::alias::canonical_table_name(name)
+                        == common::alias::canonical_table_name(&self.table_name)
+                })
     }
 
     /// Position of `column` among the display columns, counting from 1.

web/src/pages/add_table/loader.rs

@@ -71,7 +71,7 @@ pub(crate) async fn load_page(
     // for, so it is told what that table is on every render rather than left to
     // read a copy that a `refresh` could have moved on from.
     draft.columns.global = draft.global;
-    draft.columns.table_name = draft.table_name.trim().to_ascii_lowercase();
+    draft.columns.table_name = draft.table_name.trim().to_string();
 
     let tree = definitions
         .get_profile_tree(

web/src/pages/add_table/state.rs

@@ -140,7 +140,7 @@ impl BuilderForm {
             // takes no column that posts to one profile's books, and no link
             // may point at the table being created.
             global: self.global,
-            table_name: self.table_name.trim().to_ascii_lowercase(),
+            table_name: self.table_name.trim().to_string(),
         };
 
         // Drop display columns whose column is gone, so a stale post cannot

web/src/schema/mod.rs

@@ -579,7 +579,7 @@ impl ColumnDraft {
             return Ok(None);
         }
         if self.catalog.is_link(&column_type) {
-            let target = self.link_table_input.trim().to_ascii_lowercase();
+            let target = self.link_table_input.trim();
             return Ok((!target.is_empty()).then(|| format!("{column_type}({target})")));
         }
         let Some(group) = self.pending_group() else {
@@ -1209,8 +1209,28 @@ pub(crate) fn validate_table_name(
     locale: crate::i18n::Locale,
     value: &str,
 ) -> Option<String> {
-    if let Some(error) = validate_identifier(locale, value, "label-table-name", true) {
-        return Some(error);
+    let label = crate::tr!(locale, "label-table-name");
+    if value.is_empty() {
+        return Some(crate::tr!(locale, "error-identifier-empty", "label" => label));
+    }
+    if value != value.trim() {
+        return Some(crate::tr!(locale, "error-identifier-whitespace", "label" => label));
+    }
+    if !value.chars().all(|character| {
+        character.is_ascii_alphanumeric() || matches!(character, '_' | '-')
+    }) {
+        return Some(crate::tr!(locale, "error-table-name-charset", "label" => label));
+    }
+    if !value
+        .chars()
+        .next()
+        .is_some_and(|character| character.is_ascii_alphanumeric())
+        || !value
+            .chars()
+            .last()
+            .is_some_and(|character| character.is_ascii_alphanumeric())
+    {
+        return Some(crate::tr!(locale, "error-table-name-boundary", "label" => label));
     }
     if value.len() > MAX_TABLE_NAME_LENGTH {
         // The limit is arithmetic, not a literal: it moves when a system column
@@ -1221,7 +1241,10 @@ pub(crate) fn validate_table_name(
             "limit" => MAX_TABLE_NAME_LENGTH as i64,
         ));
     }
-    if RESERVED_TABLE_NAMES.contains(&value) {
+    let canonical = common::alias::canonical_table_name(value);
+    if RESERVED_TABLE_NAMES.contains(&canonical.as_str())
+        || crate::system_column::is_system_column(&canonical)
+    {
         return Some(crate::tr!(
             locale,
             "schema-err-table-name-reserved",
@@ -2305,6 +2328,12 @@ pub(crate) mod tests {
                 .unwrap_or_else(|| panic!("`{name}` should be reserved"));
             assert!(error.contains(name), "{error}");
         }
+        assert_eq!(validate_table_name(crate::i18n::Locale::default(), "Custom_Exchange_Rates"),
+            validate_table_name(crate::i18n::Locale::default(), "custom_exchange_rates"));
+        assert_eq!(validate_table_name(crate::i18n::Locale::default(), "2026-Sales_Q4"), None);
+        for name in ["_sales", "sales_", "-sales", "sales-"] {
+            assert!(validate_table_name(crate::i18n::Locale::default(), name).is_some());
+        }
         assert_eq!(validate_table_name(crate::i18n::Locale::default(), "invoice"), None);
     }
 }