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From: imeevma@tarantool.org
To: v.shpilevoy@tarantool.org
Cc: tarantool-patches@dev.tarantool.org
Subject: [Tarantool-patches] [PATCH 5/5] sql: refactor PRAGMA-related code
Date: Wed, 27 Nov 2019 13:13:36 +0300	[thread overview]
Message-ID: <5d3e3b710810bee2f6c802993c44735bc85dcc3c.1574849451.git.imeevma@gmail.com> (raw)
In-Reply-To: <cover.1574849451.git.imeevma@gmail.com>

---
 src/box/sql/parse.y              |  33 +----
 src/box/sql/pragma.c             | 252 +++++++++++++++++++--------------------
 src/box/sql/pragma.h             | 101 ++++++----------
 src/box/sql/sqlInt.h             |  16 ++-
 test/sql-tap/index-info.test.lua |   2 +-
 5 files changed, 177 insertions(+), 227 deletions(-)

diff --git a/src/box/sql/parse.y b/src/box/sql/parse.y
index 9f8118e..40cec53 100644
--- a/src/box/sql/parse.y
+++ b/src/box/sql/parse.y
@@ -1547,37 +1547,14 @@ cmd ::= SET nm(X) EQ term(Y).  {
 ///////////////////////////// The PRAGMA command /////////////////////////////
 //
 cmd ::= PRAGMA nm(X).                        {
-    sqlPragma(pParse,&X,0,0,0);
+    sqlPragma(pParse,&X,0,0);
 }
-cmd ::= PRAGMA nm(X) EQ nmnum(Y).  {
-    sqlPragma(pParse,&X,&Y,0,0);
-}
-cmd ::= PRAGMA nm(X) LP nmnum(Y) RP.         {
-    sqlPragma(pParse,&X,&Y,0,0);
-}
-cmd ::= PRAGMA nm(X) EQ minus_num(Y).        {
-    sqlPragma(pParse,&X,&Y,0,1);
-}
-cmd ::= PRAGMA nm(X) LP minus_num(Y) RP.     {
-    sqlPragma(pParse,&X,&Y,0,1);
+cmd ::= PRAGMA nm(X) LP nm(Y) RP.         {
+    sqlPragma(pParse,&X,&Y,0);
 }
 cmd ::= PRAGMA nm(X) LP nm(Z) DOT nm(Y) RP.  {
-    sqlPragma(pParse,&X,&Y,&Z,0);
-}
-
-nmnum(A) ::= plus_num(A).
-nmnum(A) ::= STRING(A).
-nmnum(A) ::= TRUE(A).
-nmnum(A) ::= FALSE(A).
-nmnum(A) ::= nm(A).
-nmnum(A) ::= ON(A).
-nmnum(A) ::= DELETE(A).
-nmnum(A) ::= DEFAULT(A).
-
-%token_class number INTEGER|FLOAT.
-plus_num(A) ::= PLUS number(X).       {A = X;}
-plus_num(A) ::= number(A).
-minus_num(A) ::= MINUS number(X).     {A = X;}
+    sqlPragma(pParse,&X,&Y,&Z);
+}
 //////////////////////////// The CREATE TRIGGER command /////////////////////
 
 cmd ::= createkw trigger_decl(A) BEGIN trigger_cmd_list(S) END(Z). {
diff --git a/src/box/sql/pragma.c b/src/box/sql/pragma.c
index 0eaa2ca..a12612b 100644
--- a/src/box/sql/pragma.c
+++ b/src/box/sql/pragma.c
@@ -43,22 +43,6 @@
 #include "vdbeInt.h"
 #include "box/schema.h"
 #include "box/session.h"
-
-/*
- ************************************************************************
- * pragma.h contains several pragmas, including utf's pragmas.
- * All that is not utf-8 should be omitted
- ************************************************************************
- */
-
-/***************************************************************************
- * The "pragma.h" include file is an automatically generated file that
- * that includes the PragType_XXXX macro definitions and the aPragmaName[]
- * object.  This ensures that the aPragmaName[] table is arranged in
- * lexicographical order to facility a binary search of the pragma name.
- * Do not edit pragma.h directly.  Edit and rerun the script in at
- * ../tool/mkpragmatab.tcl.
- */
 #include "pragma.h"
 #include "tarantoolInt.h"
 
@@ -80,7 +64,7 @@ vdbe_set_pragma_result_columns(struct Vdbe *v, const struct PragmaName *pragma)
 /*
  * Locate a pragma in the aPragmaName[] array.
  */
-static const PragmaName *
+static const struct PragmaName *
 pragmaLocate(const char *zName)
 {
 	int upr, lwr, mid, rc;
@@ -202,7 +186,7 @@ sql_pragma_table_stats(struct space *space, void *data)
  */
 static void
 sql_pragma_index_info(struct Parse *parse,
-		      MAYBE_UNUSED const PragmaName *pragma,
+		      MAYBE_UNUSED const struct PragmaName *pragma,
 		      const char *tbl_name, const char *idx_name)
 {
 	if (idx_name == NULL || tbl_name == NULL)
@@ -241,12 +225,54 @@ sql_pragma_index_info(struct Parse *parse,
 }
 
 /**
+ * This function handles PRAGMA collation_list.
+ *
+ * Return a list of available collations.
+ *
+ * - seqno: Zero-based column id within the index.
+ * - name: Collation name.
+ *
+ * @param parse_context Current parsing content.
+ */
+static void
+sql_pragma_collation_list(struct Parse *parse_context)
+{
+	struct Vdbe *v = sqlGetVdbe(parse_context);
+	assert(v != NULL);
+	int i = 0;
+	struct space *space = space_by_name("_collation");
+	/* 16 is enough to encode 0 len array */
+	char key_buf[16];
+	char *key_end = key_buf;
+	key_end = mp_encode_array(key_end, 0);
+	box_tuple_t *tuple;
+	box_iterator_t* it;
+	it = box_index_iterator(space->def->id, 0, ITER_ALL, key_buf, key_end);
+	if (it == NULL) {
+		parse_context->is_aborted = true;
+		return;
+	}
+	int rc = box_iterator_next(it, &tuple);
+	assert(rc == 0);
+	(void) rc;
+	for (i = 0; tuple != NULL; i++, box_iterator_next(it, &tuple)) {
+		/* 1 is name field number */
+		const char *str = tuple_field_cstr(tuple, 1);
+		assert(str != NULL);
+		/* this procedure should reallocate and copy str */
+		sqlVdbeMultiLoad(v, 1, "is", i, str);
+		sqlVdbeAddOp2(v, OP_ResultRow, 1, 2);
+	}
+	box_iterator_free(it);
+}
+
+/**
  * This function handles PRAGMA INDEX_LIST statement.
  *
  * @param parse Current parsing content.
  * @param table_name Name of table to display list of indexes.
  */
-void
+static void
 sql_pragma_index_list(struct Parse *parse, const char *tbl_name)
 {
 	if (tbl_name == NULL)
@@ -264,156 +290,120 @@ sql_pragma_index_list(struct Parse *parse, const char *tbl_name)
 	}
 }
 
-/*
- * Process a pragma statement.
- *
- * Pragmas are of this form:
- *
- *      PRAGMA [schema.]id [= value]
- *
- * The identifier might also be a string.  The value is a string, and
- * identifier, or a number.  If minusFlag is true, then the value is
- * a number that was preceded by a minus sign.
+/**
+ * This function handles PRAGMA foreign_key_list(<table>).
  *
- * If the left side is "database.id" then pId1 is the database name
- * and pId2 is the id.  If the left side is just "id" then pId1 is the
- * id and pId2 is any empty string.
+ * @param parse_context Current parsing content.
+ * @param table_name Name of table to display list of FK.
  */
+static void
+sql_pragma_foreign_key_list(struct Parse *parse_context, const char *table_name)
+{
+	if (table_name == NULL)
+		return;
+	struct space *space = space_by_name(table_name);
+	if (space == NULL)
+		return;
+	struct Vdbe *v = sqlGetVdbe(parse_context);
+	assert(v != NULL);
+	int i = 0;
+	parse_context->nMem = 8;
+	struct fk_constraint *fk_c;
+	rlist_foreach_entry(fk_c, &space->child_fk_constraint, in_child_space) {
+		struct fk_constraint_def *fk_def = fk_c->def;
+		for (uint32_t j = 0; j < fk_def->field_count; j++) {
+			struct space *parent = space_by_id(fk_def->parent_id);
+			assert(parent != NULL);
+			uint32_t ch_fl = fk_def->links[j].child_field;
+			const char *child_col = space->def->fields[ch_fl].name;
+			uint32_t pr_fl = fk_def->links[j].parent_field;
+			const char *parent_col =
+				parent->def->fields[pr_fl].name;
+			const char *on_delete_action =
+				fk_constraint_action_strs[fk_def->on_delete];
+			const char *on_update_action =
+				fk_constraint_action_strs[fk_def->on_update];
+			sqlVdbeMultiLoad(v, 1, "iissssss", i, j,
+					 parent->def->name, child_col,
+					 parent_col, on_delete_action,
+					 on_update_action, "NONE");
+			sqlVdbeAddOp2(v, OP_ResultRow, 1, 8);
+		}
+		++i;
+	}
+}
+
 void
-sqlPragma(Parse * pParse, Token * pId,	/* First part of [schema.]id field */
-	      Token * pValue,	/* Token for <value>, or NULL */
-	      Token * pValue2,	/* Token for <value2>, or NULL */
-	      int minusFlag	/* True if a '-' sign preceded <value> */
-    )
+sqlPragma(Parse *pParse, Token *pragma, Token *table, Token *index)
 {
-	char *zLeft = 0;	/* Nul-terminated UTF-8 string <id> */
-	char *zRight = 0;	/* Nul-terminated UTF-8 string <value>, or NULL */
-	char *zTable = 0;	/* Nul-terminated UTF-8 string <value2> or NULL */
-	sql *db = pParse->db;	/* The database connection */
-	Vdbe *v = sqlGetVdbe(pParse);	/* Prepared statement */
-	const PragmaName *pPragma;	/* The pragma */
+	char *pragma_name = NULL;
+	char *table_name = NULL;
+	char *index_name = NULL;
+	sql *db = pParse->db;
+	Vdbe *v = sqlGetVdbe(pParse);
+	const struct PragmaName *pPragma;
 
-	if (v == 0)
+	if (v == NULL)
 		return;
 	sqlVdbeRunOnlyOnce(v);
 	pParse->nMem = 2;
 
-	zLeft = sql_name_from_token(db, pId);
-	if (zLeft == NULL) {
+	pragma_name = sql_name_from_token(db, pragma);
+	if (pragma_name == NULL) {
 		pParse->is_aborted = true;
 		goto pragma_out;
 	}
-	if (minusFlag) {
-		zRight = sqlMPrintf(db, "-%T", pValue);
-	} else if (pValue != NULL) {
-		zRight = sql_name_from_token(db, pValue);
-		if (zRight == NULL) {
+	if (table != NULL) {
+		table_name = sql_name_from_token(db, table);
+		if (table_name == NULL) {
 			pParse->is_aborted = true;
 			goto pragma_out;
 		}
 	}
-	if (pValue2 != NULL) {
-		zTable = sql_name_from_token(db, pValue2);
-		if (zTable == NULL) {
+	if (index != NULL) {
+		index_name = sql_name_from_token(db, index);
+		if (index_name == NULL) {
 			pParse->is_aborted = true;
 			goto pragma_out;
 		}
 	}
+
 	/* Locate the pragma in the lookup table */
-	pPragma = pragmaLocate(zLeft);
+	pPragma = pragmaLocate(pragma_name);
 	if (pPragma == 0) {
-		diag_set(ClientError, ER_SQL_NO_SUCH_PRAGMA, zLeft);
+		diag_set(ClientError, ER_SQL_NO_SUCH_PRAGMA, pragma_name);
 		pParse->is_aborted = true;
 		goto pragma_out;
 	}
 	/* Register the result column names for pragmas that return results */
 	vdbe_set_pragma_result_columns(v, pPragma);
+
 	/* Jump to the appropriate pragma handler */
 	switch (pPragma->ePragTyp) {
-
-	case PragTyp_TABLE_INFO:
-		sql_pragma_table_info(pParse, zRight);
+	case PRAGMA_TABLE_INFO:
+		sql_pragma_table_info(pParse, table_name);
 		break;
-	case PragTyp_STATS:
+	case PRAGMA_STATS:
 		space_foreach(sql_pragma_table_stats, (void *) pParse);
 		break;
-	case PragTyp_INDEX_INFO:
-		sql_pragma_index_info(pParse, pPragma, zTable, zRight);
+	case PRAGMA_INDEX_INFO:
+		sql_pragma_index_info(pParse, pPragma, index_name, table_name);
 		break;
-	case PragTyp_INDEX_LIST:
-		sql_pragma_index_list(pParse, zRight);
+	case PRAGMA_INDEX_LIST:
+		sql_pragma_index_list(pParse, table_name);
 		break;
-
-	case PragTyp_COLLATION_LIST:{
-		int i = 0;
-		struct space *space = space_by_name("_collation");
-		char key_buf[16]; /* 16 is enough to encode 0 len array */
-		char *key_end = key_buf;
-		key_end = mp_encode_array(key_end, 0);
-		box_tuple_t *tuple;
-		box_iterator_t* iter;
-		iter = box_index_iterator(space->def->id, 0,ITER_ALL, key_buf, key_end);
-		if (iter == NULL) {
-			pParse->is_aborted = true;
-			goto pragma_out;
-		}
-		int rc = box_iterator_next(iter, &tuple);
-		(void) rc;
-		assert(rc == 0);
-		for (i = 0; tuple!=NULL; i++, box_iterator_next(iter, &tuple)){
-			/* 1 is name field number */
-			const char *str = tuple_field_cstr(tuple, 1);
-			assert(str != NULL);
-			/* this procedure should reallocate and copy str */
-			sqlVdbeMultiLoad(v, 1, "is", i, str);
-			sqlVdbeAddOp2(v, OP_ResultRow, 1, 2);
-		}
-		box_iterator_free(iter);
+	case PRAGMA_COLLATION_LIST:
+		sql_pragma_collation_list(pParse);
 		break;
-	}
-
-	case PragTyp_FOREIGN_KEY_LIST:{
-		if (zRight == NULL)
-			break;
-		struct space *space = space_by_name(zRight);
-		if (space == NULL)
-			break;
-		int i = 0;
-		pParse->nMem = 8;
-		struct fk_constraint *fk_c;
-		rlist_foreach_entry(fk_c, &space->child_fk_constraint,
-				    in_child_space) {
-
-			struct fk_constraint_def *fk_def = fk_c->def;
-			for (uint32_t j = 0; j < fk_def->field_count; j++) {
-				struct space *parent =
-					space_by_id(fk_def->parent_id);
-				assert(parent != NULL);
-				uint32_t ch_fl = fk_def->links[j].child_field;
-				const char *child_col =
-					space->def->fields[ch_fl].name;
-				uint32_t pr_fl = fk_def->links[j].parent_field;
-				const char *parent_col =
-					parent->def->fields[pr_fl].name;
-				sqlVdbeMultiLoad(v, 1, "iissssss", i, j,
-						     parent->def->name,
-						     child_col, parent_col,
-						     fk_constraint_action_strs[fk_def->on_delete],
-						     fk_constraint_action_strs[fk_def->on_update],
-						     "NONE");
-				sqlVdbeAddOp2(v, OP_ResultRow, 1, 8);
-			}
-			++i;
-		}
+	case PRAGMA_FOREIGN_KEY_LIST:
+		sql_pragma_foreign_key_list(pParse, table_name);
 		break;
-	}
-
 	default:
 		unreachable();
-	}			/* End of the PRAGMA switch */
+	}
 
  pragma_out:
-	sqlDbFree(db, zLeft);
-	sqlDbFree(db, zRight);
-	sqlDbFree(db, zTable);
+	sqlDbFree(db, pragma_name);
+	sqlDbFree(db, table_name);
+	sqlDbFree(db, index_name);
 }
diff --git a/src/box/sql/pragma.h b/src/box/sql/pragma.h
index 6c66d97..178746b 100644
--- a/src/box/sql/pragma.h
+++ b/src/box/sql/pragma.h
@@ -1,23 +1,19 @@
-/* DO NOT EDIT!
- * This file is automatically generated by the script at
- * ../tool/mkpragmatab.tcl.  To update the set of pragmas, edit
- * that script and rerun it.
- */
-
-/* The various pragma types */
-#define PragTyp_COLLATION_LIST                 3
-#define PragTyp_FOREIGN_KEY_LIST               9
-#define PragTyp_INDEX_INFO                    10
-#define PragTyp_INDEX_LIST                    11
-#define PragTyp_STATS                         15
-#define PragTyp_TABLE_INFO                    17
-
-/* Property flags associated with various pragma. */
-#define PragFlg_NeedSchema 0x01	/* Force schema load before running */
-#define PragFlg_Result0    0x10	/* Acts as query when no argument */
-#define PragFlg_Result1    0x20	/* Acts as query when has one argument */
-#define PragFlg_SchemaOpt  0x40	/* Schema restricts name search if present */
-#define PragFlg_SchemaReq  0x80	/* Schema required - "main" is default */
+/** List of ID of pragmas. */
+enum
+{
+	/** Pragma collation_list. */
+	PRAGMA_COLLATION_LIST = 0,
+	/** Pragma foreign_key_list. */
+	PRAGMA_FOREIGN_KEY_LIST,
+	/** Pragma index_info. */
+	PRAGMA_INDEX_INFO,
+	/** Pragma index_list. */
+	PRAGMA_INDEX_LIST,
+	/** Pragma stats. */
+	PRAGMA_STATS,
+	/** Pragma table_info. */
+	PRAGMA_TABLE_INFO,
+};
 
 /**
  * Column names and types for pragmas. The type of the column is
@@ -90,54 +86,27 @@ static const char *const pragCName[] = {
 	/*  57 */ "text",
 };
 
-/* Definitions of all built-in pragmas */
-typedef struct PragmaName {
-	const char *const zName;	/* Name of pragma */
-	u8 ePragTyp;		/* PragTyp_XXX value */
-	u8 mPragFlg;		/* Zero or more PragFlg_XXX values */
-	u8 iPragCName;		/* Start of column names in pragCName[] */
-	u8 nPragCName;		/* Num of col names. */
-	u32 iArg;		/* Extra argument */
-} PragmaName;
+/** Definitions of all built-in pragmas */
+struct PragmaName {
+	/** Name of pragma. */
+	const char *const zName;
+	/** Id of pragma. */
+	u8 ePragTyp;
+	/** Start of column names in pragCName[] */
+	u8 iPragCName;
+	/** Number of column names. */
+	u8 nPragCName;
+};
+
 /**
  * The order of pragmas in this array is important: it has
  * to be sorted. For more info see pragma_locate function.
  */
-static const PragmaName aPragmaName[] = {
-	{ /* zName:     */ "collation_list",
-	 /* ePragTyp:  */ PragTyp_COLLATION_LIST,
-	 /* ePragFlg:  */ PragFlg_Result0,
-	 /* ColNames:  */ 38, 2,
-	 /* iArg:      */ 0},
-	{ /* zName:     */ "foreign_key_list",
-	 /* ePragTyp:  */ PragTyp_FOREIGN_KEY_LIST,
-	 /* ePragFlg:  */
-	 PragFlg_NeedSchema | PragFlg_Result1 | PragFlg_SchemaOpt,
-	 /* ColNames:  */ 42, 8,
-	 /* iArg:      */ 0},
-	{ /* zName:     */ "index_info",
-	 /* ePragTyp:  */ PragTyp_INDEX_INFO,
-	 /* ePragFlg:  */
-	 PragFlg_NeedSchema | PragFlg_Result1 | PragFlg_SchemaOpt,
-	 /* ColNames:  */ 20, 6,
-	 /* iArg:      */ 1},
-	{ /* zName:     */ "index_list",
-	 /* ePragTyp:  */ PragTyp_INDEX_LIST,
-	 /* ePragFlg:  */
-	 PragFlg_NeedSchema | PragFlg_Result1 | PragFlg_SchemaOpt,
-	 /* ColNames:  */ 32, 3,
-	 /* iArg:      */ 0},
-	{ /* zName:     */ "stats",
-	 /* ePragTyp:  */ PragTyp_STATS,
-	 /* ePragFlg:  */
-	 PragFlg_NeedSchema | PragFlg_Result0 | PragFlg_SchemaReq,
-	 /* ColNames:  */ 12, 4,
-	 /* iArg:      */ 0},
-	{ /* zName:     */ "table_info",
-	 /* ePragTyp:  */ PragTyp_TABLE_INFO,
-	 /* ePragFlg:  */
-	 PragFlg_NeedSchema | PragFlg_Result1 | PragFlg_SchemaOpt,
-	 /* ColNames:  */ 0, 6,
-	 /* iArg:      */ 0},
+static const struct PragmaName aPragmaName[] = {
+	{"collation_list", PRAGMA_COLLATION_LIST, 38, 2},
+	{"foreign_key_list", PRAGMA_FOREIGN_KEY_LIST, 42, 8},
+	{"index_info", PRAGMA_INDEX_INFO, 20, 6},
+	{"index_list", PRAGMA_INDEX_LIST, 32, 3},
+	{"stats", PRAGMA_STATS, 12, 4},
+	{"table_info", PRAGMA_TABLE_INFO, 0, 6},
 };
-/* Number of pragmas: 36 on by default, 47 total. */
diff --git a/src/box/sql/sqlInt.h b/src/box/sql/sqlInt.h
index 927c674..850127c 100644
--- a/src/box/sql/sqlInt.h
+++ b/src/box/sql/sqlInt.h
@@ -2759,7 +2759,21 @@ void sqlExprListSetSpan(Parse *, ExprList *, ExprSpan *);
 u32 sqlExprListFlags(const ExprList *);
 int sqlInit(sql *);
 
-void sqlPragma(Parse *, Token *, Token *, Token *, int);
+/*
+ * Process a pragma statement.
+ *
+ * Pragmas are of this form:
+ * PRAGMA <pragma_name>;
+ * PRAGMA <pragma_name>(<table_name>);
+ * PRAGMA <pragma_name>(<table_name>.<index_name>);
+ *
+ * @param pParse Parse context.
+ * @param pragma Name of the pragma.
+ * @param table Name of the table.
+ * @param index Name of the index.
+ */
+void
+sqlPragma(Parse *pParse, Token *pragma, Token *table, Token *index);
 
 /**
  * Return true if given column is part of primary key.
diff --git a/test/sql-tap/index-info.test.lua b/test/sql-tap/index-info.test.lua
index a5ed9a9..69eac39 100755
--- a/test/sql-tap/index-info.test.lua
+++ b/test/sql-tap/index-info.test.lua
@@ -26,7 +26,7 @@ test:do_catchsql_test(
     "index-info-1.2",
     "PRAGMA index_info = t1.a;",
     {
-        1, "Syntax error near '.'",
+        1, "Syntax error near '='",
     })
 
 -- Case: single column index with an integer column.
-- 
2.7.4

      parent reply	other threads:[~2019-11-27 10:13 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-27 10:13 [Tarantool-patches] [PATCH 0/5] Introduce SQL SET statement imeevma
2019-11-27 10:13 ` [Tarantool-patches] [PATCH 1/5] sql: remove PRAGMA "count_changes" imeevma
2019-11-27 10:13 ` [Tarantool-patches] [PATCH 2/5] sql: remove PRAGMA "short_column_names" imeevma
2019-11-27 10:13 ` [Tarantool-patches] [PATCH 3/5] temporary: disable boolean.test.sql imeevma
2019-11-27 10:13 ` [Tarantool-patches] [PATCH 4/5] sql: replace control pragmas by SET imeevma
2019-11-27 10:45   ` Mergen Imeev
2019-11-27 10:51   ` Konstantin Osipov
2019-11-27 11:05     ` Mergen Imeev
2019-11-27 11:10       ` Konstantin Osipov
2019-11-27 11:24         ` Mergen Imeev
2019-11-27 11:39           ` Konstantin Osipov
2019-11-27 12:21             ` Mergen Imeev
2019-11-27 12:49               ` Konstantin Osipov
2019-11-27 13:01                 ` Mergen Imeev
2019-11-27 14:03                   ` Nikita Pettik
2019-11-27 21:50                     ` Konstantin Osipov
2019-11-27 23:22                   ` Vladislav Shpilevoy
2019-11-28 12:31                     ` Konstantin Osipov
2019-11-28 14:01                       ` Nikita Pettik
2019-11-28 15:52                         ` Konstantin Osipov
2019-11-27 23:18       ` Vladislav Shpilevoy
2019-11-27 10:13 ` imeevma [this message]

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