allow to set unlimited rows for max_rows_per_postings_list

Author: ahmadov

src/Storages/MergeTree/MergeTreeIndexGin.cpp

@@ -860,7 +860,7 @@ void ginIndexValidator(const IndexDescription & index, bool /*attach*/)
 
     /// Check that max_rows_per_postings_list is valid (if present)
     UInt64 max_rows_per_postings_list = getOption<UInt64>(options, ARGUMENT_MAX_ROWS).value_or(DEFAULT_MAX_ROWS_PER_POSTINGS_LIST);
-    if (max_rows_per_postings_list < MIN_ROWS_PER_POSTINGS_LIST)
+    if (max_rows_per_postings_list != UNLIMITED_ROWS_PER_POSTINGS_LIST && max_rows_per_postings_list < MIN_ROWS_PER_POSTINGS_LIST)
         throw Exception(
             ErrorCodes::INCORRECT_QUERY,
             "GIN index '{}' should not be less than {}", ARGUMENT_MAX_ROWS, MIN_ROWS_PER_POSTINGS_LIST);

tests/queries/0_stateless/02346_gin_index_creation.reference

@@ -4,6 +4,7 @@ Test single tokenizer argument.
 Test ngram_size argument.
 -- ngram size must be between 2 and 8.
 Test max_rows_per_postings_list argument.
+-- max_rows_per_posting_list is set to unlimited rows.
 -- max_rows_per_posting_list should be at least 8192.
 Parameters are shuffled.
 Types are incorrect.

tests/queries/0_stateless/02346_gin_index_creation.sql

@@ -90,6 +90,17 @@ ENGINE = MergeTree
 ORDER BY tuple();
 DROP TABLE tab;
 
+SELECT '-- max_rows_per_posting_list is set to unlimited rows.';
+
+CREATE TABLE tab
+(
+    str String,
+    INDEX idx str TYPE gin(tokenizer = 'default', max_rows_per_postings_list = 0)
+)
+ENGINE = MergeTree
+ORDER BY tuple();
+DROP TABLE tab;
+
 SELECT '-- max_rows_per_posting_list should be at least 8192.';
 
 CREATE TABLE tab