[tarantool-patches] [PATCH v5 4/6] sql: fix "PRAGMA case_sensitive_like" result

[imeevma@tarantool.org]

Currently PRAGMA case_sensitive_like returns nothing. This seems
wrong, since other similar pragmas return their status. Fixed in
the current patch.
---
 src/box/sql/pragma.c    | 23 +++++++++--------------
 src/box/sql/pragma.h    |  7 +++----
 src/box/sql/sqliteInt.h |  2 ++
 test/sql/misc.result    | 17 +++++++++++++++++
 test/sql/misc.test.lua  | 10 ++++++++++
 5 files changed, 41 insertions(+), 18 deletions(-)

diff --git a/src/box/sql/pragma.c b/src/box/sql/pragma.c
index 5e276b4..a610345 100644
--- a/src/box/sql/pragma.c
+++ b/src/box/sql/pragma.c
@@ -487,6 +487,15 @@ sqlite3Pragma(Parse * pParse, Token * pId,	/* First part of [schema.]id field */
 					sqlite3ParserTrace(0, 0);
 			}
 #endif
+			/*
+			 * Reinstall the LIKE and functions. The
+			 * variant of LIKE * used will be case
+			 * sensitive or not depending on the RHS.
+			 */
+			if (mask == LIKE_CASE_SENS_FLAG) {
+				sqlite3RegisterLikeFunctions(db,
+							     !is_pragma_set);
+			}
 		}
 		break;
 	}
@@ -567,20 +576,6 @@ sqlite3Pragma(Parse * pParse, Token * pId,	/* First part of [schema.]id field */
 		break;
 	}
 
-		/*
-		 * Reinstall the LIKE and functions. The variant
-		 * of LIKE * used will be case sensitive or not
-		 * depending on the RHS.
-		 */
-	case PragTyp_CASE_SENSITIVE_LIKE:{
-			if (zRight) {
-				int is_like_ci =
-					!(sqlite3GetBoolean(zRight, 0));
-				sqlite3RegisterLikeFunctions(db, is_like_ci);
-			}
-			break;
-		}
-
 	case PragTyp_DEFAULT_ENGINE: {
 		if (zRight == NULL) {
 			const char *engine_name =
diff --git a/src/box/sql/pragma.h b/src/box/sql/pragma.h
index 4837923..6ccf720 100644
--- a/src/box/sql/pragma.h
+++ b/src/box/sql/pragma.h
@@ -6,7 +6,6 @@
 
 /* The various pragma types */
 #define PragTyp_BUSY_TIMEOUT                   1
-#define PragTyp_CASE_SENSITIVE_LIKE            2
 #define PragTyp_COLLATION_LIST                 3
 #define PragTyp_FLAG                           5
 #define PragTyp_FOREIGN_KEY_LIST               9
@@ -92,10 +91,10 @@ static const PragmaName aPragmaName[] = {
 	 /* ColNames:  */ 31, 1,
 	 /* iArg:      */ 0},
 	{ /* zName:     */ "case_sensitive_like",
-	 /* ePragTyp:  */ PragTyp_CASE_SENSITIVE_LIKE,
-	 /* ePragFlg:  */ PragFlg_NoColumns,
+	 /* ePragTyp:  */ PragTyp_FLAG,
+	 /* ePragFlg:  */ PragFlg_Result0 | PragFlg_NoColumns1,
 	 /* ColNames:  */ 0, 0,
-	 /* iArg:      */ 0},
+	 /* iArg:      */ LIKE_CASE_SENS_FLAG},
 	{ /* zName:     */ "collation_list",
 	 /* ePragTyp:  */ PragTyp_COLLATION_LIST,
 	 /* ePragFlg:  */ PragFlg_Result0,
diff --git a/src/box/sql/sqliteInt.h b/src/box/sql/sqliteInt.h
index 740db9f..026fada 100644
--- a/src/box/sql/sqliteInt.h
+++ b/src/box/sql/sqliteInt.h
@@ -1550,6 +1550,8 @@ struct sqlite3 {
 /* Debug print info about SQL query as it parsed */
 #define PARSER_TRACE_FLAG     0x00000002
 #define SQLITE_FullColNames   0x00000004	/* Show full column names on SELECT */
+/* True if LIKE is case sensitive. */
+#define LIKE_CASE_SENS_FLAG   0x00000008
 #define SQLITE_ShortColNames  0x00000040	/* Show short columns names */
 #define SQLITE_CountRows      0x00000080	/* Count rows changed by INSERT, */
 					  /*   DELETE, or UPDATE and return */
diff --git a/test/sql/misc.result b/test/sql/misc.result
index ef104c1..3496fab 100644
--- a/test/sql/misc.result
+++ b/test/sql/misc.result
@@ -40,3 +40,20 @@ box.sql.execute('\n\n\n\t\t\t   ')
 ---
 - error: 'syntax error: empty request'
 ...
+--
+-- gh-3832: Some statements do not return column type
+-- Check that "PRAGMA case_sensitive_like" returns 0 or 1 if
+-- called without parameter.
+result = box.sql.execute('PRAGMA case_sensitive_like')
+---
+...
+box.sql.execute('PRAGMA case_sensitive_like = 1')
+---
+...
+box.sql.execute('PRAGMA case_sensitive_like')
+---
+- - [1]
+...
+box.sql.execute('PRAGMA case_sensitive_like = '.. result[1][1])
+---
+...
diff --git a/test/sql/misc.test.lua b/test/sql/misc.test.lua
index 994e64f..9d4abf5 100644
--- a/test/sql/misc.test.lua
+++ b/test/sql/misc.test.lua
@@ -11,3 +11,13 @@ box.sql.execute(';')
 box.sql.execute('')
 box.sql.execute('     ;')
 box.sql.execute('\n\n\n\t\t\t   ')
+
+--
+-- gh-3832: Some statements do not return column type
+
+-- Check that "PRAGMA case_sensitive_like" returns 0 or 1 if
+-- called without parameter.
+result = box.sql.execute('PRAGMA case_sensitive_like')
+box.sql.execute('PRAGMA case_sensitive_like = 1')
+box.sql.execute('PRAGMA case_sensitive_like')
+box.sql.execute('PRAGMA case_sensitive_like = '.. result[1][1])
-- 
2.7.4