database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-11-11 01:42:22 +03:00
Code Activity

Working prototype.

Browse Source 
FossilOrigin-Name: b7ef4dc21f187ff4ff679e823782535188c3814aa6ce720b3a01c6d3ba4ef9f5
This commit is contained in:
drh
2021-01-29 19:32:17 +00:00
parent 2c99b84c95
commit b835247954
10 changed files with 117 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
src/sqliteInt.h
View File

@@ -1159,6 +1159,7 @@ typedef struct ParseCleanup ParseCleanup;
typedef struct PreUpdate PreUpdate;
typedef struct PrintfArguments PrintfArguments;
typedef struct RenameToken RenameToken;
typedef struct Returning Returning;
typedef struct RowSet RowSet;
typedef struct Savepoint Savepoint;
typedef struct Select Select;
@@ -3429,6 +3430,7 @@ struct Parse {
u32 oldmask; /* Mask of old.* columns referenced */
u32 newmask; /* Mask of new.* columns referenced */
u8 eTriggerOp; /* TK_UPDATE, TK_INSERT or TK_DELETE */
u8 bReturning; /* Coding a RETURNING trigger */
u8 eOrconf; /* Default ON CONFLICT policy for trigger steps */
u8 disableTriggers; /* True to disable triggers */
@@ -3441,7 +3443,6 @@ struct Parse {
int aTempReg[8]; /* Holding area for temporary registers */
Token sNameToken; /* Token with unqualified schema object name */
ExprList *pReturning; /* The RETURNING clause, if any */
/************************************************************************
** Above is constant between recursions. Below is reset before and after
@@ -3579,6 +3580,7 @@ struct Trigger {
char *table; /* The table or view to which the trigger applies */
u8 op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT */
u8 tr_tm; /* One of TRIGGER_BEFORE, TRIGGER_AFTER */
u8 bReturning; /* This trigger implements a RETURNING clause */
Expr *pWhen; /* The WHEN clause of the expression (may be NULL) */
IdList *pColumns; /* If this is an UPDATE OF <column-list> trigger,
the <column-list> is stored here */
@@ -3639,6 +3641,7 @@ struct Trigger {
struct TriggerStep {
u8 op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT, TK_SELECT */
u8 orconf; /* OE_Rollback etc. */
u8 eTrigDest; /* SRT_ destination value for SELECT */
Trigger *pTrig; /* The trigger that this step is a part of */
Select *pSelect; /* SELECT statement or RHS of INSERT INTO SELECT ... */
char *zTarget; /* Target table for DELETE, UPDATE, INSERT */
@@ -3652,6 +3655,18 @@ struct TriggerStep {
TriggerStep *pLast; /* Last element in link-list. Valid for 1st elem only */
};
/*
** Information about a RETURNING clause
*/
struct Returning {
Parse *pParse; /* The parse that includes the RETURNING clause */
ExprList *pReturnEL; /* List of expressions to return */
Trigger retTrig; /* The transient trigger that implements RETURNING */
TriggerStep retTStep; /* The trigger step */
Select retSel; /* The SELECT statement that implements RETURNING */
u64 retSrcList; /* The empty FROM clause of the SELECT */
};
/*
** An objected used to accumulate the text of a string where we
** do not necessarily know how big the string will be in the end.