SQLITE_INDEX_CONSTRAINT_EQ(3) | Library Functions Manual | SQLITE_INDEX_CONSTRAINT_EQ(3)

# NAME

`SQLITE_INDEX_CONSTRAINT_EQ`, `SQLITE_INDEX_CONSTRAINT_GT`, `SQLITE_INDEX_CONSTRAINT_LE`, `SQLITE_INDEX_CONSTRAINT_LT`, `SQLITE_INDEX_CONSTRAINT_GE`, `SQLITE_INDEX_CONSTRAINT_MATCH`, `SQLITE_INDEX_CONSTRAINT_LIKE`, `SQLITE_INDEX_CONSTRAINT_GLOB`, `SQLITE_INDEX_CONSTRAINT_REGEXP`, `SQLITE_INDEX_CONSTRAINT_NE`, `SQLITE_INDEX_CONSTRAINT_ISNOT`, `SQLITE_INDEX_CONSTRAINT_ISNOTNULL`, `SQLITE_INDEX_CONSTRAINT_ISNULL`, `SQLITE_INDEX_CONSTRAINT_IS`, `SQLITE_INDEX_CONSTRAINT_LIMIT`, `SQLITE_INDEX_CONSTRAINT_OFFSET`, `SQLITE_INDEX_CONSTRAINT_FUNCTION` — virtual table constraint operator codes

# SYNOPSIS

`#include <sqlite3.h>`

`#define SQLITE_INDEX_CONSTRAINT_EQ`
`#define SQLITE_INDEX_CONSTRAINT_GT`
`#define SQLITE_INDEX_CONSTRAINT_LE`
`#define SQLITE_INDEX_CONSTRAINT_LT`
`#define SQLITE_INDEX_CONSTRAINT_GE`
`#define SQLITE_INDEX_CONSTRAINT_MATCH`
`#define SQLITE_INDEX_CONSTRAINT_LIKE`
`#define SQLITE_INDEX_CONSTRAINT_GLOB`
`#define SQLITE_INDEX_CONSTRAINT_REGEXP`
`#define SQLITE_INDEX_CONSTRAINT_NE`
`#define SQLITE_INDEX_CONSTRAINT_ISNOT`
`#define SQLITE_INDEX_CONSTRAINT_ISNOTNULL`
`#define SQLITE_INDEX_CONSTRAINT_ISNULL`
`#define SQLITE_INDEX_CONSTRAINT_IS`
`#define SQLITE_INDEX_CONSTRAINT_LIMIT`
`#define SQLITE_INDEX_CONSTRAINT_OFFSET`
`#define SQLITE_INDEX_CONSTRAINT_FUNCTION`

# DESCRIPTION

These macros define the allowed values for the sqlite3_index_info.aConstraint[].op field. Each value represents an operator that is part of a constraint term in the WHERE clause of a query that uses a virtual table.

The left-hand operand of the operator is given by the corresponding aConstraint[].iColumn field. An iColumn of -1 indicates the left-hand operand is the rowid. The SQLITE_INDEX_CONSTRAINT_LIMIT and SQLITE_INDEX_CONSTRAINT_OFFSET operators have no left-hand operand, and so for those operators the corresponding aConstraint[].iColumn is meaningless and should not be used.

All operator values from SQLITE_INDEX_CONSTRAINT_FUNCTION through value 255 are reserved to represent functions that are overloaded by the xFindFunction method of the virtual table implementation.

The right-hand operands for each constraint might be accessible using the `sqlite3_vtab_rhs_value`() interface. Usually the right-hand operand is only available if it appears as a single constant literal in the input SQL. If the right-hand operand is another column or an expression (even a constant expression) or a parameter, then the sqlite3_vtab_rhs_value() probably will not be able to extract it. The SQLITE_INDEX_CONSTRAINT_ISNULL and SQLITE_INDEX_CONSTRAINT_ISNOTNULL operators have no right-hand operand and hence calls to sqlite3_vtab_rhs_value() for those operators will always return SQLITE_NOTFOUND.

The collating sequence to be used for comparison can be found using the `sqlite3_vtab_collation`() interface. For most real-world virtual tables, the collating sequence of constraints does not matter (for example because the constraints are numeric) and so the sqlite3_vtab_collation() interface is not commonly needed.

# IMPLEMENTATION NOTES

These declarations were extracted from the interface documentation at line 7474.

    #define SQLITE_INDEX_CONSTRAINT_EQ          2
    #define SQLITE_INDEX_CONSTRAINT_GT          4
    #define SQLITE_INDEX_CONSTRAINT_LE          8
    #define SQLITE_INDEX_CONSTRAINT_LT         16
    #define SQLITE_INDEX_CONSTRAINT_GE         32
    #define SQLITE_INDEX_CONSTRAINT_MATCH      64
    #define SQLITE_INDEX_CONSTRAINT_LIKE       65
    #define SQLITE_INDEX_CONSTRAINT_GLOB       66
    #define SQLITE_INDEX_CONSTRAINT_REGEXP     67
    #define SQLITE_INDEX_CONSTRAINT_NE         68
    #define SQLITE_INDEX_CONSTRAINT_ISNOT      69
    #define SQLITE_INDEX_CONSTRAINT_ISNOTNULL  70
    #define SQLITE_INDEX_CONSTRAINT_ISNULL     71
    #define SQLITE_INDEX_CONSTRAINT_IS         72
    #define SQLITE_INDEX_CONSTRAINT_LIMIT      73
    #define SQLITE_INDEX_CONSTRAINT_OFFSET     74
    #define SQLITE_INDEX_CONSTRAINT_FUNCTION  150

# SEE ALSO

sqlite3_index_info(3), sqlite3_vtab_collation(3), sqlite3_vtab_rhs_value(3)

January 24, 2024 | NetBSD 11.0